var H5P = H5P || {};
/**
 * Transition contains helper function relevant for transitioning
 */
H5P.Transition = (function ($) {

  /**
   * @class
   * @namespace H5P
   */
  Transition = {};

  /**
   * @private
   */
  Transition.transitionEndEventNames = {
    'WebkitTransition': 'webkitTransitionEnd',
    'transition':       'transitionend',
    'MozTransition':    'transitionend',
    'OTransition':      'oTransitionEnd',
    'msTransition':     'MSTransitionEnd'
  };

  /**
   * @private
   */
  Transition.cache = [];

  /**
   * Get the vendor property name for an event
   *
   * @function H5P.Transition.getVendorPropertyName
   * @static
   * @private
   * @param  {string} prop Generic property name
   * @return {string}      Vendor specific property name
   */
  Transition.getVendorPropertyName = function (prop) {

    if (Transition.cache[prop] !== undefined) {
      return Transition.cache[prop];
    }

    var div = document.createElement('div');

    // Handle unprefixed versions (FF16+, for example)
    if (prop in div.style) {
      Transition.cache[prop] = prop;
    }
    else {
      var prefixes = ['Moz', 'Webkit', 'O', 'ms'];
      var prop_ = prop.charAt(0).toUpperCase() + prop.substr(1);

      if (prop in div.style) {
        Transition.cache[prop] = prop;
      }
      else {
        for (var i = 0; i < prefixes.length; ++i) {
          var vendorProp = prefixes[i] + prop_;
          if (vendorProp in div.style) {
            Transition.cache[prop] = vendorProp;
            break;
          }
        }
      }
    }

    return Transition.cache[prop];
  };

  /**
   * Get the name of the transition end event
   *
   * @static
   * @private
   * @return {string}  description
   */
  Transition.getTransitionEndEventName = function () {
    return Transition.transitionEndEventNames[Transition.getVendorPropertyName('transition')] || undefined;
  };

  /**
   * Helper function for listening on transition end events
   *
   * @function H5P.Transition.onTransitionEnd
   * @static
   * @param  {domElement} $element The element which is transitioned
   * @param  {function} callback The callback to be invoked when transition is finished
   * @param  {number} timeout  Timeout in milliseconds. Fallback if transition event is never fired
   */
  Transition.onTransitionEnd = function ($element, callback, timeout) {
    // Fallback on 1 second if transition event is not supported/triggered
    timeout = timeout || 1000;
    Transition.transitionEndEventName = Transition.transitionEndEventName || Transition.getTransitionEndEventName();
    var callbackCalled = false;

    var doCallback = function () {
      if (callbackCalled) {
        return;
      }
      $element.off(Transition.transitionEndEventName, callback);
      callbackCalled = true;
      clearTimeout(timer);
      callback();
    };

    var timer = setTimeout(function () {
      doCallback();
    }, timeout);

    $element.on(Transition.transitionEndEventName, function () {
      doCallback();
    });
  };

  /**
   * Wait for a transition - when finished, invokes next in line
   *
   * @private
   *
   * @param {Object[]}    transitions             Array of transitions
   * @param {H5P.jQuery}  transitions[].$element  Dom element transition is performed on
   * @param {number=}     transitions[].timeout   Timeout fallback if transition end never is triggered
   * @param {bool=}       transitions[].break     If true, sequence breaks after this transition
   * @param {number}      index                   The index for current transition
   */
  var runSequence = function (transitions, index) {
    if (index >= transitions.length) {
      return;
    }

    var transition = transitions[index];
    H5P.Transition.onTransitionEnd(transition.$element, function () {
      if (transition.end) {
        transition.end();
      }
      if (transition.break !== true) {
        runSequence(transitions, index+1);
      }
    }, transition.timeout || undefined);
  };

  /**
   * Run a sequence of transitions
   *
   * @function H5P.Transition.sequence
   * @static
   * @param {Object[]}    transitions             Array of transitions
   * @param {H5P.jQuery}  transitions[].$element  Dom element transition is performed on
   * @param {number=}     transitions[].timeout   Timeout fallback if transition end never is triggered
   * @param {bool=}       transitions[].break     If true, sequence breaks after this transition
   */
  Transition.sequence = function (transitions) {
    runSequence(transitions, 0);
  };

  return Transition;
})(H5P.jQuery);
;
var H5P = H5P || {};

/**
 * Class responsible for creating a help text dialog
 */
H5P.JoubelHelpTextDialog = (function ($) {

  var numInstances = 0;
  /**
   * Display a pop-up containing a message.
   *
   * @param {H5P.jQuery}  $container  The container which message dialog will be appended to
   * @param {string}      message     The message
   * @param {string}      closeButtonTitle The title for the close button
   * @return {H5P.jQuery}
   */
  function JoubelHelpTextDialog(header, message, closeButtonTitle) {
    H5P.EventDispatcher.call(this);

    var self = this;

    numInstances++;
    var headerId = 'joubel-help-text-header-' + numInstances;
    var helpTextId = 'joubel-help-text-body-' + numInstances;

    var $helpTextDialogBox = $('<div>', {
      'class': 'joubel-help-text-dialog-box',
      'role': 'dialog',
      'aria-labelledby': headerId,
      'aria-describedby': helpTextId
    });

    $('<div>', {
      'class': 'joubel-help-text-dialog-background'
    }).appendTo($helpTextDialogBox);

    var $helpTextDialogContainer = $('<div>', {
      'class': 'joubel-help-text-dialog-container'
    }).appendTo($helpTextDialogBox);

    $('<div>', {
      'class': 'joubel-help-text-header',
      'id': headerId,
      'role': 'header',
      'html': header
    }).appendTo($helpTextDialogContainer);

    $('<div>', {
      'class': 'joubel-help-text-body',
      'id': helpTextId,
      'html': message,
      'role': 'document',
      'tabindex': 0
    }).appendTo($helpTextDialogContainer);

    var handleClose = function () {
      $helpTextDialogBox.remove();
      self.trigger('closed');
    };

    var $closeButton = $('<div>', {
      'class': 'joubel-help-text-remove',
      'role': 'button',
      'title': closeButtonTitle,
      'tabindex': 1,
      'click': handleClose,
      'keydown': function (event) {
        // 32 - space, 13 - enter
        if ([32, 13].indexOf(event.which) !== -1) {
          event.preventDefault();
          handleClose();
        }
      }
    }).appendTo($helpTextDialogContainer);

    /**
     * Get the DOM element
     * @return {HTMLElement}
     */
    self.getElement = function () {
      return $helpTextDialogBox;
    };

    self.focus = function () {
      $closeButton.focus();
    };
  }

  JoubelHelpTextDialog.prototype = Object.create(H5P.EventDispatcher.prototype);
  JoubelHelpTextDialog.prototype.constructor = JoubelHelpTextDialog;

  return JoubelHelpTextDialog;
}(H5P.jQuery));
;
var H5P = H5P || {};

/**
 * Class responsible for creating auto-disappearing dialogs
 */
H5P.JoubelMessageDialog = (function ($) {

  /**
   * Display a pop-up containing a message.
   *
   * @param {H5P.jQuery} $container The container which message dialog will be appended to
   * @param {string} message The message
   * @return {H5P.jQuery}
   */
  function JoubelMessageDialog ($container, message) {
    var timeout;

    var removeDialog = function () {
      $warning.remove();
      clearTimeout(timeout);
      $container.off('click.messageDialog');
    };

    // Create warning popup:
    var $warning = $('<div/>', {
      'class': 'joubel-message-dialog',
      text: message
    }).appendTo($container);

    // Remove after 3 seconds or if user clicks anywhere in $container:
    timeout = setTimeout(removeDialog, 3000);
    $container.on('click.messageDialog', removeDialog);

    return $warning;
  }

  return JoubelMessageDialog;
})(H5P.jQuery);
;
var H5P = H5P || {};

/**
 * Class responsible for creating a circular progress bar
 */

H5P.JoubelProgressCircle = (function ($) {

  /**
   * Constructor for the Progress Circle
   *
   * @param {Number} number The amount of progress to display
   * @param {string} progressColor Color for the progress meter
   * @param {string} backgroundColor Color behind the progress meter
   */
  function ProgressCircle(number, progressColor, fillColor, backgroundColor) {
    progressColor = progressColor || '#1a73d9';
    fillColor = fillColor || '#f0f0f0';
    backgroundColor = backgroundColor || '#ffffff';
    var progressColorRGB = this.hexToRgb(progressColor);

    //Verify number
    try {
      number = Number(number);
      if (number === '') {
        throw 'is empty';
      }
      if (isNaN(number)) {
        throw 'is not a number';
      }
    } catch (e) {
      number = 'err';
    }

    //Draw circle
    if (number > 100) {
      number = 100;
    }

    // We can not use rgba, since they will stack on top of each other.
    // Instead we create the equivalent of the rgba color
    // and applies this to the activeborder and background color.
    var progressColorString = 'rgb(' + parseInt(progressColorRGB.r, 10) +
      ',' + parseInt(progressColorRGB.g, 10) +
      ',' + parseInt(progressColorRGB.b, 10) + ')';

    // Circle wrapper
    var $wrapper = $('<div/>', {
      'class': "joubel-progress-circle-wrapper"
    });

    //Active border indicates progress
    var $activeBorder = $('<div/>', {
      'class': "joubel-progress-circle-active-border"
    }).appendTo($wrapper);

    //Background circle
    var $backgroundCircle = $('<div/>', {
      'class': "joubel-progress-circle-circle"
    }).appendTo($activeBorder);

    //Progress text/number
    $('<span/>', {
      'text': number + '%',
      'class': "joubel-progress-circle-percentage"
    }).appendTo($backgroundCircle);

    var deg = number * 3.6;
    if (deg <= 180) {
      $activeBorder.css('background-image',
        'linear-gradient(' + (90 + deg) + 'deg, transparent 50%, ' + fillColor + ' 50%),' +
        'linear-gradient(90deg, ' + fillColor + ' 50%, transparent 50%)')
        .css('border', '2px solid' + backgroundColor)
        .css('background-color', progressColorString);
    } else {
      $activeBorder.css('background-image',
        'linear-gradient(' + (deg - 90) + 'deg, transparent 50%, ' + progressColorString + ' 50%),' +
        'linear-gradient(90deg, ' + fillColor + ' 50%, transparent 50%)')
        .css('border', '2px solid' + backgroundColor)
        .css('background-color', progressColorString);
    }

    this.$activeBorder = $activeBorder;
    this.$backgroundCircle = $backgroundCircle;
    this.$wrapper = $wrapper;

    this.initResizeFunctionality();

    return $wrapper;
  }

  /**
   * Initializes resize functionality for the progress circle
   */
  ProgressCircle.prototype.initResizeFunctionality = function () {
    var self = this;

    $(window).resize(function () {
      // Queue resize
      setTimeout(function () {
        self.resize();
      });
    });

    // First resize
    setTimeout(function () {
      self.resize();
    }, 0);
  };

  /**
   * Resize function makes progress circle grow or shrink relative to parent container
   */
  ProgressCircle.prototype.resize = function () {
    var $parent = this.$wrapper.parent();

    if ($parent !== undefined && $parent) {

      // Measurements
      var fontSize = parseInt($parent.css('font-size'), 10);

      // Static sizes
      var fontSizeMultiplum = 3.75;
      var progressCircleWidthPx = parseInt((fontSize / 4.5), 10) % 2 === 0 ? parseInt((fontSize / 4.5), 10) + 4 : parseInt((fontSize / 4.5), 10) + 5;
      var progressCircleOffset = progressCircleWidthPx / 2;

      var width = fontSize * fontSizeMultiplum;
      var height = fontSize * fontSizeMultiplum;
      this.$activeBorder.css({
        'width': width,
        'height': height
      });

      this.$backgroundCircle.css({
        'width': width - progressCircleWidthPx,
        'height': height - progressCircleWidthPx,
        'top': progressCircleOffset,
        'left': progressCircleOffset
      });
    }
  };

  /**
   * Hex to RGB conversion
   * @param hex
   * @returns {{r: Number, g: Number, b: Number}}
   */
  ProgressCircle.prototype.hexToRgb = function (hex) {
    var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
    return result ? {
      r: parseInt(result[1], 16),
      g: parseInt(result[2], 16),
      b: parseInt(result[3], 16)
    } : null;
  };

  return ProgressCircle;

}(H5P.jQuery));
;
var H5P = H5P || {};

H5P.SimpleRoundedButton = (function ($) {

  /**
   * Creates a new tip
   */
  function SimpleRoundedButton(text) {

    var $simpleRoundedButton = $('<div>', {
      'class': 'joubel-simple-rounded-button',
      'title': text,
      'role': 'button',
      'tabindex': '0'
    }).keydown(function (e) {
      // 32 - space, 13 - enter
      if ([32, 13].indexOf(e.which) !== -1) {
        $(this).click();
        e.preventDefault();
      }
    });

    $('<span>', {
      'class': 'joubel-simple-rounded-button-text',
      'html': text
    }).appendTo($simpleRoundedButton);

    return $simpleRoundedButton;
  }

  return SimpleRoundedButton;
}(H5P.jQuery));
;
var H5P = H5P || {};

/**
 * Class responsible for creating speech bubbles
 */
H5P.JoubelSpeechBubble = (function ($) {

  var $currentSpeechBubble;
  var $currentContainer;  
  var $tail;
  var $innerTail;
  var removeSpeechBubbleTimeout;
  var currentMaxWidth;

  var DEFAULT_MAX_WIDTH = 400;

  var iDevice = navigator.userAgent.match(/iPod|iPhone|iPad/g) ? true : false;

  /**
   * Creates a new speech bubble
   *
   * @param {H5P.jQuery} $container The speaking object
   * @param {string} text The text to display
   * @param {number} maxWidth The maximum width of the bubble
   * @return {H5P.JoubelSpeechBubble}
   */
  function JoubelSpeechBubble($container, text, maxWidth) {
    maxWidth = maxWidth || DEFAULT_MAX_WIDTH;
    currentMaxWidth = maxWidth;
    $currentContainer = $container;

    this.isCurrent = function ($tip) {
      return $tip.is($currentContainer);
    };

    this.remove = function () {
      remove();
    };

    var fadeOutSpeechBubble = function ($speechBubble) {
      if (!$speechBubble) {
        return;
      }

      // Stop removing bubble
      clearTimeout(removeSpeechBubbleTimeout);

      $speechBubble.removeClass('show');
      setTimeout(function () {
        if ($speechBubble) {
          $speechBubble.remove();
          $speechBubble = undefined;
        }
      }, 500);
    };

    if ($currentSpeechBubble !== undefined) {
      remove();
    }

    var $h5pContainer = getH5PContainer($container);

    // Make sure we fade out old speech bubble
    fadeOutSpeechBubble($currentSpeechBubble);

    // Create bubble
    $tail = $('<div class="joubel-speech-bubble-tail"></div>');
    $innerTail = $('<div class="joubel-speech-bubble-inner-tail"></div>');
    var $innerBubble = $(
      '<div class="joubel-speech-bubble-inner">' +
      '<div class="joubel-speech-bubble-text">' + text + '</div>' +
      '</div>'
    ).prepend($innerTail);

    $currentSpeechBubble = $(
      '<div class="joubel-speech-bubble" aria-live="assertive">'
    ).append([$tail, $innerBubble])
      .appendTo($h5pContainer);

    // Show speech bubble with transition
    setTimeout(function () {
      $currentSpeechBubble.addClass('show');
    }, 0);

    position($currentSpeechBubble, $currentContainer, maxWidth, $tail, $innerTail);

    // Handle click to close
    H5P.$body.on('mousedown.speechBubble', handleOutsideClick);

    // Handle window resizing
    H5P.$window.on('resize', '', handleResize);

    // Handle clicks when inside IV which blocks bubbling.
    $container.parents('.h5p-dialog')
      .on('mousedown.speechBubble', handleOutsideClick);

    if (iDevice) {
      H5P.$body.css('cursor', 'pointer');
    }

    return this;
  }

  // Remove speechbubble if it belongs to a dom element that is about to be hidden
  H5P.externalDispatcher.on('domHidden', function (event) {
    if ($currentSpeechBubble !== undefined && event.data.$dom.find($currentContainer).length !== 0) {
      remove();
    }
  });

  /**
   * Returns the closest h5p container for the given DOM element.
   * 
   * @param {object} $container jquery element
   * @return {object} the h5p container (jquery element)
   */
  function getH5PContainer($container) {
    var $h5pContainer = $container.closest('.h5p-frame');

    // Check closest h5p frame first, then check for container in case there is no frame.
    if (!$h5pContainer.length) {
      $h5pContainer = $container.closest('.h5p-container');
    }

    return $h5pContainer;
  }

  /**
   * Event handler that is called when the window is resized.
   */
  function handleResize() {
    position($currentSpeechBubble, $currentContainer, currentMaxWidth, $tail, $innerTail);
  }

  /**
   * Repositions the speech bubble according to the position of the container.
   * 
   * @param {object} $currentSpeechbubble the speech bubble that should be positioned   
   * @param {object} $container the container to which the speech bubble should point 
   * @param {number} maxWidth the maximum width of the speech bubble
   * @param {object} $tail the tail (the triangle that points to the referenced container)
   * @param {object} $innerTail the inner tail (the triangle that points to the referenced container)
   */
  function position($currentSpeechBubble, $container, maxWidth, $tail, $innerTail) {
    var $h5pContainer = getH5PContainer($container);

    // Calculate offset between the button and the h5p frame
    var offset = getOffsetBetween($h5pContainer, $container);

    var direction = (offset.bottom > offset.top ? 'bottom' : 'top');
    var tipWidth = offset.outerWidth * 0.9; // Var needs to be renamed to make sense
    var bubbleWidth = tipWidth > maxWidth ? maxWidth : tipWidth;

    var bubblePosition = getBubblePosition(bubbleWidth, offset);
    var tailPosition = getTailPosition(bubbleWidth, bubblePosition, offset, $container.width());
    // Need to set font-size, since element is appended to body.
    // Using same font-size as parent. In that way it will grow accordingly
    // when resizing
    var fontSize = 16;//parseFloat($parent.css('font-size'));

    // Set width and position of speech bubble
    $currentSpeechBubble.css(bubbleCSS(
      direction,
      bubbleWidth,
      bubblePosition,
      fontSize
    ));

    var preparedTailCSS = tailCSS(direction, tailPosition);
    $tail.css(preparedTailCSS);
    $innerTail.css(preparedTailCSS);
  }

  /**
   * Static function for removing the speechbubble
   */
  var remove = function () {
    H5P.$body.off('mousedown.speechBubble');
    H5P.$window.off('resize', '', handleResize);
    $currentContainer.parents('.h5p-dialog').off('mousedown.speechBubble');
    if (iDevice) {
      H5P.$body.css('cursor', '');
    }
    if ($currentSpeechBubble !== undefined) {
      // Apply transition, then remove speech bubble
      $currentSpeechBubble.removeClass('show');

      // Make sure we remove any old timeout before reassignment
      clearTimeout(removeSpeechBubbleTimeout);
      removeSpeechBubbleTimeout = setTimeout(function () {
        $currentSpeechBubble.remove();
        $currentSpeechBubble = undefined;
      }, 500);
    }
    // Don't return false here. If the user e.g. clicks a button when the bubble is visible,
    // we want the bubble to disapear AND the button to receive the event
  };

  /**
   * Remove the speech bubble and container reference
   */
  function handleOutsideClick(event) {
    if (event.target === $currentContainer[0]) {
      return; // Button clicks are not outside clicks
    }

    remove();
    // There is no current container when a container isn't clicked
    $currentContainer = undefined;
  }

  /**
   * Calculate position for speech bubble
   *
   * @param {number} bubbleWidth The width of the speech bubble
   * @param {object} offset
   * @return {object} Return position for the speech bubble
   */
  function getBubblePosition(bubbleWidth, offset) {
    var bubblePosition = {};

    var tailOffset = 9;
    var widthOffset = bubbleWidth / 2;

    // Calculate top position
    bubblePosition.top = offset.top + offset.innerHeight;

    // Calculate bottom position
    bubblePosition.bottom = offset.bottom + offset.innerHeight + tailOffset;

    // Calculate left position
    if (offset.left < widthOffset) {
      bubblePosition.left = 3;
    }
    else if ((offset.left + widthOffset) > offset.outerWidth) {
      bubblePosition.left = offset.outerWidth - bubbleWidth - 3;
    }
    else {
      bubblePosition.left = offset.left - widthOffset + (offset.innerWidth / 2);
    }

    return bubblePosition;
  }

  /**
   * Calculate position for speech bubble tail
   *
   * @param {number} bubbleWidth The width of the speech bubble
   * @param {object} bubblePosition Speech bubble position
   * @param {object} offset
   * @param {number} iconWidth The width of the tip icon
   * @return {object} Return position for the tail
   */
  function getTailPosition(bubbleWidth, bubblePosition, offset, iconWidth) {
    var tailPosition = {};
    // Magic numbers. Tuned by hand so that the tail fits visually within
    // the bounds of the speech bubble.
    var leftBoundary = 9;
    var rightBoundary = bubbleWidth - 20;

    tailPosition.left = offset.left - bubblePosition.left + (iconWidth / 2) - 6;
    if (tailPosition.left < leftBoundary) {
      tailPosition.left = leftBoundary;
    }
    if (tailPosition.left > rightBoundary) {
      tailPosition.left = rightBoundary;
    }

    tailPosition.top = -6;
    tailPosition.bottom = -6;

    return tailPosition;
  }

  /**
   * Return bubble CSS for the desired growth direction
   *
   * @param {string} direction The direction the speech bubble will grow
   * @param {number} width The width of the speech bubble
   * @param {object} position Speech bubble position
   * @param {number} fontSize The size of the bubbles font
   * @return {object} Return CSS
   */
  function bubbleCSS(direction, width, position, fontSize) {
    if (direction === 'top') {
      return {
        width: width + 'px',
        bottom: position.bottom + 'px',
        left: position.left + 'px',
        fontSize: fontSize + 'px',
        top: ''
      };
    }
    else {
      return {
        width: width + 'px',
        top: position.top + 'px',
        left: position.left + 'px',
        fontSize: fontSize + 'px',
        bottom: ''
      };
    }
  }

  /**
   * Return tail CSS for the desired growth direction
   *
   * @param {string} direction The direction the speech bubble will grow
   * @param {object} position Tail position
   * @return {object} Return CSS
   */
  function tailCSS(direction, position) {
    if (direction === 'top') {
      return {
        bottom: position.bottom + 'px',
        left: position.left + 'px',
        top: ''
      };
    }
    else {
      return {
        top: position.top + 'px',
        left: position.left + 'px',
        bottom: ''
      };
    }
  }

  /**
   * Calculates the offset between an element inside a container and the
   * container. Only works if all the edges of the inner element are inside the
   * outer element.
   * Width/height of the elements is included as a convenience.
   *
   * @param {H5P.jQuery} $outer
   * @param {H5P.jQuery} $inner
   * @return {object} Position offset
   */
  function getOffsetBetween($outer, $inner) {
    var outer = $outer[0].getBoundingClientRect();
    var inner = $inner[0].getBoundingClientRect();

    return {
      top: inner.top - outer.top,
      right: outer.right - inner.right,
      bottom: outer.bottom - inner.bottom,
      left: inner.left - outer.left,
      innerWidth: inner.width,
      innerHeight: inner.height,
      outerWidth: outer.width,
      outerHeight: outer.height
    };
  }

  return JoubelSpeechBubble;
})(H5P.jQuery);
;
var H5P = H5P || {};

H5P.JoubelThrobber = (function ($) {

  /**
   * Creates a new tip
   */
  function JoubelThrobber() {

    // h5p-throbber css is described in core
    var $throbber = $('<div/>', {
      'class': 'h5p-throbber'
    });

    return $throbber;
  }

  return JoubelThrobber;
}(H5P.jQuery));
;
H5P.JoubelTip = (function ($) {
  var $conv = $('<div/>');

  /**
   * Creates a new tip element.
   *
   * NOTE that this may look like a class but it doesn't behave like one.
   * It returns a jQuery object.
   *
   * @param {string} tipHtml The text to display in the popup
   * @param {Object} [behaviour] Options
   * @param {string} [behaviour.tipLabel] Set to use a custom label for the tip button (you want this for good A11Y)
   * @param {boolean} [behaviour.helpIcon] Set to 'true' to Add help-icon classname to Tip button (changes the icon)
   * @param {boolean} [behaviour.showSpeechBubble] Set to 'false' to disable functionality (you may this in the editor)
   * @param {boolean} [behaviour.tabcontrol] Set to 'true' if you plan on controlling the tabindex in the parent (tabindex="-1")
   * @return {H5P.jQuery|undefined} Tip button jQuery element or 'undefined' if invalid tip
   */
  function JoubelTip(tipHtml, behaviour) {

    // Keep track of the popup that appears when you click the Tip button
    var speechBubble;

    // Parse tip html to determine text
    var tipText = $conv.html(tipHtml).text().trim();
    if (tipText === '') {
      return; // The tip has no textual content, i.e. it's invalid.
    }

    // Set default behaviour
    behaviour = $.extend({
      tipLabel: tipText,
      helpIcon: false,
      showSpeechBubble: true,
      tabcontrol: false
    }, behaviour);

    // Create Tip button
    var $tipButton = $('<div/>', {
      class: 'joubel-tip-container' + (behaviour.showSpeechBubble ? '' : ' be-quiet'),
      'aria-label': behaviour.tipLabel,
      'aria-expanded': false,
      role: 'button',
      tabindex: (behaviour.tabcontrol ? -1 : 0),
      click: function (event) {
        // Toggle show/hide popup
        toggleSpeechBubble();
        event.preventDefault();
      },
      keydown: function (event) {
        if (event.which === 32 || event.which === 13) { // Space & enter key
          // Toggle show/hide popup
          toggleSpeechBubble();
          event.stopPropagation();
          event.preventDefault();
        }
        else { // Any other key
          // Toggle hide popup
          toggleSpeechBubble(false);
        }
      },
      // Add markup to render icon
      html: '<span class="joubel-icon-tip-normal ' + (behaviour.helpIcon ? ' help-icon': '') + '">' +
              '<span class="h5p-icon-shadow"></span>' +
              '<span class="h5p-icon-speech-bubble"></span>' +
              '<span class="h5p-icon-info"></span>' +
            '</span>'
      // IMPORTANT: All of the markup elements must have 'pointer-events: none;'
    });

    const $tipAnnouncer = $('<div>', {
      'class': 'hidden-but-read',
      'aria-live': 'polite',
      appendTo: $tipButton,
    });

    /**
     * Tip button interaction handler.
     * Toggle show or hide the speech bubble popup when interacting with the
     * Tip button.
     *
     * @private
     * @param {boolean} [force] 'true' shows and 'false' hides.
     */
    var toggleSpeechBubble = function (force) {
      if (speechBubble !== undefined && speechBubble.isCurrent($tipButton)) {
        // Hide current popup
        speechBubble.remove();
        speechBubble = undefined;

        $tipButton.attr('aria-expanded', false);
        $tipAnnouncer.html('');
      }
      else if (force !== false && behaviour.showSpeechBubble) {
        // Create and show new popup
        speechBubble = H5P.JoubelSpeechBubble($tipButton, tipHtml);
        $tipButton.attr('aria-expanded', true);
        $tipAnnouncer.html(tipHtml);
      }
    };

    return $tipButton;
  }

  return JoubelTip;
})(H5P.jQuery);
;
var H5P = H5P || {};

H5P.JoubelSlider = (function ($) {

  /**
   * Creates a new Slider
   *
   * @param {object} [params] Additional parameters
   */
  function JoubelSlider(params) {
    H5P.EventDispatcher.call(this);

    this.$slider = $('<div>', $.extend({
      'class': 'h5p-joubel-ui-slider'
    }, params));

    this.$slides = [];
    this.currentIndex = 0;
    this.numSlides = 0;
  }
  JoubelSlider.prototype = Object.create(H5P.EventDispatcher.prototype);
  JoubelSlider.prototype.constructor = JoubelSlider;

  JoubelSlider.prototype.addSlide = function ($content) {
    $content.addClass('h5p-joubel-ui-slide').css({
      'left': (this.numSlides*100) + '%'
    });
    this.$slider.append($content);
    this.$slides.push($content);

    this.numSlides++;

    if(this.numSlides === 1) {
      $content.addClass('current');
    }
  };

  JoubelSlider.prototype.attach = function ($container) {
    $container.append(this.$slider);
  };

  JoubelSlider.prototype.move = function (index) {
    var self = this;

    if(index === 0) {
      self.trigger('first-slide');
    }
    if(index+1 === self.numSlides) {
      self.trigger('last-slide');
    }
    self.trigger('move');

    var $previousSlide = self.$slides[this.currentIndex];
    H5P.Transition.onTransitionEnd(this.$slider, function () {
      $previousSlide.removeClass('current');
      self.trigger('moved');
    });
    this.$slides[index].addClass('current');

    var translateX = 'translateX(' + (-index*100) + '%)';
    this.$slider.css({
      '-webkit-transform': translateX,
      '-moz-transform': translateX,
      '-ms-transform': translateX,
      'transform': translateX
    });

    this.currentIndex = index;
  };

  JoubelSlider.prototype.remove = function () {
    this.$slider.remove();
  };

  JoubelSlider.prototype.next = function () {
    if(this.currentIndex+1 >= this.numSlides) {
      return;
    }

    this.move(this.currentIndex+1);
  };

  JoubelSlider.prototype.previous = function () {
    this.move(this.currentIndex-1);
  };

  JoubelSlider.prototype.first = function () {
    this.move(0);
  };

  JoubelSlider.prototype.last = function () {
    this.move(this.numSlides-1);
  };

  return JoubelSlider;
})(H5P.jQuery);
;
var H5P = H5P || {};

/**
 * @module
 */
H5P.JoubelScoreBar = (function ($) {

  /* Need to use an id for the star SVG since that is the only way to reference
     SVG filters  */
  var idCounter = 0;

  /**
   * Creates a score bar
   * @class H5P.JoubelScoreBar
   * @param {number} maxScore  Maximum score
   * @param {string} [label] Makes it easier for readspeakers to identify the scorebar
   * @param {string} [helpText] Score explanation
   * @param {string} [scoreExplanationButtonLabel] Label for score explanation button
   */
  function JoubelScoreBar(maxScore, label, helpText, scoreExplanationButtonLabel) {
    var self = this;

    self.maxScore = maxScore;
    self.score = 0;
    idCounter++;

    /**
     * @const {string}
     */
    self.STAR_MARKUP = '<svg tabindex="-1" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 63.77 53.87" aria-hidden="true" focusable="false">' +
        '<title>star</title>' +
        '<filter tabindex="-1" id="h5p-joubelui-score-bar-star-inner-shadow-' + idCounter + '" x0="-50%" y0="-50%" width="200%" height="200%">' +
          '<feGaussianBlur in="SourceAlpha" stdDeviation="3" result="blur"></feGaussianBlur>' +
          '<feOffset dy="2" dx="4"></feOffset>' +
          '<feComposite in2="SourceAlpha" operator="arithmetic" k2="-1" k3="1" result="shadowDiff"></feComposite>' +
          '<feFlood flood-color="#ffe95c" flood-opacity="1"></feFlood>' +
          '<feComposite in2="shadowDiff" operator="in"></feComposite>' +
          '<feComposite in2="SourceGraphic" operator="over" result="firstfilter"></feComposite>' +
          '<feGaussianBlur in="firstfilter" stdDeviation="3" result="blur2"></feGaussianBlur>' +
          '<feOffset dy="-2" dx="-4"></feOffset>' +
          '<feComposite in2="firstfilter" operator="arithmetic" k2="-1" k3="1" result="shadowDiff"></feComposite>' +
          '<feFlood flood-color="#ffe95c" flood-opacity="1"></feFlood>' +
          '<feComposite in2="shadowDiff" operator="in"></feComposite>' +
          '<feComposite in2="firstfilter" operator="over"></feComposite>' +
        '</filter>' +
        '<path tabindex="-1" class="h5p-joubelui-score-bar-star-shadow" d="M35.08,43.41V9.16H20.91v0L9.51,10.85,9,10.93C2.8,12.18,0,17,0,21.25a11.22,11.22,0,0,0,3,7.48l8.73,8.53-1.07,6.16Z"/>' +
        '<g tabindex="-1">' +
          '<path tabindex="-1" class="h5p-joubelui-score-bar-star-border" d="M61.36,22.8,49.72,34.11l2.78,16a2.6,2.6,0,0,1,.05.64c0,.85-.37,1.6-1.33,1.6A2.74,2.74,0,0,1,49.94,52L35.58,44.41,21.22,52a2.93,2.93,0,0,1-1.28.37c-.91,0-1.33-.75-1.33-1.6,0-.21.05-.43.05-.64l2.78-16L9.8,22.8A2.57,2.57,0,0,1,9,21.25c0-1,1-1.33,1.81-1.49l16.07-2.35L34.09,2.83c.27-.59.85-1.33,1.55-1.33s1.28.69,1.55,1.33l7.21,14.57,16.07,2.35c.75.11,1.81.53,1.81,1.49A3.07,3.07,0,0,1,61.36,22.8Z"/>' +
          '<path tabindex="-1" class="h5p-joubelui-score-bar-star-fill" d="M61.36,22.8,49.72,34.11l2.78,16a2.6,2.6,0,0,1,.05.64c0,.85-.37,1.6-1.33,1.6A2.74,2.74,0,0,1,49.94,52L35.58,44.41,21.22,52a2.93,2.93,0,0,1-1.28.37c-.91,0-1.33-.75-1.33-1.6,0-.21.05-.43.05-.64l2.78-16L9.8,22.8A2.57,2.57,0,0,1,9,21.25c0-1,1-1.33,1.81-1.49l16.07-2.35L34.09,2.83c.27-.59.85-1.33,1.55-1.33s1.28.69,1.55,1.33l7.21,14.57,16.07,2.35c.75.11,1.81.53,1.81,1.49A3.07,3.07,0,0,1,61.36,22.8Z"/>' +
          '<path tabindex="-1" filter="url(#h5p-joubelui-score-bar-star-inner-shadow-' + idCounter + ')" class="h5p-joubelui-score-bar-star-fill-full-score" d="M61.36,22.8,49.72,34.11l2.78,16a2.6,2.6,0,0,1,.05.64c0,.85-.37,1.6-1.33,1.6A2.74,2.74,0,0,1,49.94,52L35.58,44.41,21.22,52a2.93,2.93,0,0,1-1.28.37c-.91,0-1.33-.75-1.33-1.6,0-.21.05-.43.05-.64l2.78-16L9.8,22.8A2.57,2.57,0,0,1,9,21.25c0-1,1-1.33,1.81-1.49l16.07-2.35L34.09,2.83c.27-.59.85-1.33,1.55-1.33s1.28.69,1.55,1.33l7.21,14.57,16.07,2.35c.75.11,1.81.53,1.81,1.49A3.07,3.07,0,0,1,61.36,22.8Z"/>' +
        '</g>' +
      '</svg>';

    /**
     * @function appendTo
     * @memberOf H5P.JoubelScoreBar#
     * @param {H5P.jQuery}  $wrapper  Dom container
     */
    self.appendTo = function ($wrapper) {
      self.$scoreBar.appendTo($wrapper);
    };

    /**
     * Create the text representation of the scorebar .
     *
     * @private
     * @return {string}
     */
    var createLabel = function (score) {
      if (!label) {
        return '';
      }

      return label.replace(':num', score).replace(':total', self.maxScore);
    };

    /**
     * Creates the html for this widget
     *
     * @method createHtml
     * @private
     */
    var createHtml = function () {
      // Container div
      self.$scoreBar = $('<div>', {
        'class': 'h5p-joubelui-score-bar',
      });

      var $visuals = $('<div>', {
        'class': 'h5p-joubelui-score-bar-visuals',
        appendTo: self.$scoreBar
      });

      // The progress bar wrapper
      self.$progressWrapper = $('<div>', {
        'class': 'h5p-joubelui-score-bar-progress-wrapper',
        appendTo: $visuals
      });

      self.$progress = $('<div>', {
        'class': 'h5p-joubelui-score-bar-progress',
        'html': createLabel(self.score),
        appendTo: self.$progressWrapper
      });

      // The star
      $('<div>', {
        'class': 'h5p-joubelui-score-bar-star',
        html: self.STAR_MARKUP
      }).appendTo($visuals);

      // The score container
      var $numerics = $('<div>', {
        'class': 'h5p-joubelui-score-numeric',
        appendTo: self.$scoreBar,
        'aria-hidden': true
      });

      // The current score
      self.$scoreCounter = $('<span>', {
        'class': 'h5p-joubelui-score-number h5p-joubelui-score-number-counter',
        text: 0,
        appendTo: $numerics
      });

      // The separator
      $('<span>', {
        'class': 'h5p-joubelui-score-number-separator',
        text: '/',
        appendTo: $numerics
      });

      // Max score
      self.$maxScore = $('<span>', {
        'class': 'h5p-joubelui-score-number h5p-joubelui-score-max',
        text: self.maxScore,
        appendTo: $numerics
      });

      if (helpText) {
        H5P.JoubelUI.createTip(helpText, {
          tipLabel: scoreExplanationButtonLabel ? scoreExplanationButtonLabel : helpText,
          helpIcon: true
        }).appendTo(self.$scoreBar);
        self.$scoreBar.addClass('h5p-score-bar-has-help');
      }
    };

    /**
     * Set the current score
     * @method setScore
     * @memberOf H5P.JoubelScoreBar#
     * @param  {number} score
     */
    self.setScore = function (score) {
      // Do nothing if score hasn't changed
      if (score === self.score) {
        return;
      }
      self.score = score > self.maxScore ? self.maxScore : score;
      self.updateVisuals();
    };

    /**
     * Increment score
     * @method incrementScore
     * @memberOf H5P.JoubelScoreBar#
     * @param  {number=}        incrementBy Optional parameter, defaults to 1
     */
    self.incrementScore = function (incrementBy) {
      self.setScore(self.score + (incrementBy || 1));
    };

    /**
     * Set the max score
     * @method setMaxScore
     * @memberOf H5P.JoubelScoreBar#
     * @param  {number}    maxScore The max score
     */
    self.setMaxScore = function (maxScore) {
      self.maxScore = maxScore;
    };

    /**
     * Updates the progressbar visuals
     * @memberOf H5P.JoubelScoreBar#
     * @method updateVisuals
     */
    self.updateVisuals = function () {
      self.$progress.html(createLabel(self.score));
      self.$scoreCounter.text(self.score);
      self.$maxScore.text(self.maxScore);

      setTimeout(function () {
        // Start the progressbar animation
        self.$progress.css({
          width: ((self.score / self.maxScore) * 100) + '%'
        });

        H5P.Transition.onTransitionEnd(self.$progress, function () {
          // If fullscore fill the star and start the animation
          self.$scoreBar.toggleClass('h5p-joubelui-score-bar-full-score', self.score === self.maxScore);
          self.$scoreBar.toggleClass('h5p-joubelui-score-bar-animation-active', self.score === self.maxScore);

          // Only allow the star animation to run once
          self.$scoreBar.one("animationend", function() {
            self.$scoreBar.removeClass("h5p-joubelui-score-bar-animation-active");
          });
        }, 600);
      }, 300);
    };

    /**
     * Removes all classes
     * @method reset
     */
    self.reset = function () {
      self.$scoreBar.removeClass('h5p-joubelui-score-bar-full-score');
    };

    createHtml();
  }

  return JoubelScoreBar;
})(H5P.jQuery);
;
var H5P = H5P || {};

H5P.JoubelProgressbar = (function ($) {

  /**
   * Joubel progressbar class
   * @method JoubelProgressbar
   * @constructor
   * @param  {number}          steps Number of steps
   * @param {Object} [options] Additional options
   * @param {boolean} [options.disableAria] Disable readspeaker assistance
   * @param {string} [options.progressText] A progress text for describing
   *  current progress out of total progress for readspeakers.
   *  e.g. "Slide :num of :total"
   */
  function JoubelProgressbar(steps, options) {
    H5P.EventDispatcher.call(this);
    var self = this;
    this.options = $.extend({
      progressText: 'Slide :num of :total'
    }, options);
    this.currentStep = 0;
    this.steps = steps;

    this.$progressbar = $('<div>', {
      'class': 'h5p-joubelui-progressbar'
    });
    this.$background = $('<div>', {
      'class': 'h5p-joubelui-progressbar-background'
    }).appendTo(this.$progressbar);
  }

  JoubelProgressbar.prototype = Object.create(H5P.EventDispatcher.prototype);
  JoubelProgressbar.prototype.constructor = JoubelProgressbar;

  JoubelProgressbar.prototype.updateAria = function () {
    var self = this;
    if (this.options.disableAria) {
      return;
    }

    if (!this.$currentStatus) {
      this.$currentStatus = $('<div>', {
        'class': 'h5p-joubelui-progressbar-slide-status-text',
        'aria-live': 'assertive'
      }).appendTo(this.$progressbar);
    }
    var interpolatedProgressText = self.options.progressText
      .replace(':num', self.currentStep)
      .replace(':total', self.steps);
    this.$currentStatus.html(interpolatedProgressText);
  };

  /**
   * Appends to a container
   * @method appendTo
   * @param  {H5P.jquery} $container
   */
  JoubelProgressbar.prototype.appendTo = function ($container) {
    this.$progressbar.appendTo($container);
  };

  /**
   * Update progress
   * @method setProgress
   * @param  {number}    step
   */
  JoubelProgressbar.prototype.setProgress = function (step) {
    // Check for valid value:
    if (step > this.steps || step < 0) {
      return;
    }
    this.currentStep = step;
    this.$background.css({
      width: ((this.currentStep/this.steps)*100) + '%'
    });

    this.updateAria();
  };

  /**
   * Increment progress with 1
   * @method next
   */
  JoubelProgressbar.prototype.next = function () {
    this.setProgress(this.currentStep+1);
  };

  /**
   * Reset progressbar
   * @method reset
   */
  JoubelProgressbar.prototype.reset = function () {
    this.setProgress(0);
  };

  /**
   * Check if last step is reached
   * @method isLastStep
   * @return {Boolean}
   */
  JoubelProgressbar.prototype.isLastStep = function () {
    return this.steps === this.currentStep;
  };

  return JoubelProgressbar;
})(H5P.jQuery);
;
var H5P = H5P || {};

/**
 * H5P Joubel UI library.
 *
 * This is a utility library, which does not implement attach. I.e, it has to bee actively used by
 * other libraries
 * @module
 */
H5P.JoubelUI = (function ($) {

  /**
   * The internal object to return
   * @class H5P.JoubelUI
   * @static
   */
  function JoubelUI() {}

  /* Public static functions */

  /**
   * Create a tip icon
   * @method H5P.JoubelUI.createTip
   * @param  {string}  text   The textual tip
   * @param  {Object}  params Parameters
   * @return {H5P.JoubelTip}
   */
  JoubelUI.createTip = function (text, params) {
    return new H5P.JoubelTip(text, params);
  };

  /**
   * Create message dialog
   * @method H5P.JoubelUI.createMessageDialog
   * @param  {H5P.jQuery}               $container The dom container
   * @param  {string}                   message    The message
   * @return {H5P.JoubelMessageDialog}
   */
  JoubelUI.createMessageDialog = function ($container, message) {
    return new H5P.JoubelMessageDialog($container, message);
  };

  /**
   * Create help text dialog
   * @method H5P.JoubelUI.createHelpTextDialog
   * @param  {string}             header  The textual header
   * @param  {string}             message The textual message
   * @param  {string}             closeButtonTitle The title for the close button
   * @return {H5P.JoubelHelpTextDialog}
   */
  JoubelUI.createHelpTextDialog = function (header, message, closeButtonTitle) {
    return new H5P.JoubelHelpTextDialog(header, message, closeButtonTitle);
  };

  /**
   * Create progress circle
   * @method H5P.JoubelUI.createProgressCircle
   * @param  {number}             number          The progress (0 to 100)
   * @param  {string}             progressColor   The progress color in hex value
   * @param  {string}             fillColor       The fill color in hex value
   * @param  {string}             backgroundColor The background color in hex value
   * @return {H5P.JoubelProgressCircle}
   */
  JoubelUI.createProgressCircle = function (number, progressColor, fillColor, backgroundColor) {
    return new H5P.JoubelProgressCircle(number, progressColor, fillColor, backgroundColor);
  };

  /**
   * Create throbber for loading
   * @method H5P.JoubelUI.createThrobber
   * @return {H5P.JoubelThrobber}
   */
  JoubelUI.createThrobber = function () {
    return new H5P.JoubelThrobber();
  };

  /**
   * Create simple rounded button
   * @method H5P.JoubelUI.createSimpleRoundedButton
   * @param  {string}                  text The button label
   * @return {H5P.SimpleRoundedButton}
   */
  JoubelUI.createSimpleRoundedButton = function (text) {
    return new H5P.SimpleRoundedButton(text);
  };

  /**
   * Create Slider
   * @method H5P.JoubelUI.createSlider
   * @param  {Object} [params] Parameters
   * @return {H5P.JoubelSlider}
   */
  JoubelUI.createSlider = function (params) {
    return new H5P.JoubelSlider(params);
  };

  /**
   * Create Score Bar
   * @method H5P.JoubelUI.createScoreBar
   * @param  {number=}       maxScore The maximum score
   * @param {string} [label] Makes it easier for readspeakers to identify the scorebar
   * @return {H5P.JoubelScoreBar}
   */
  JoubelUI.createScoreBar = function (maxScore, label, helpText, scoreExplanationButtonLabel) {
    return new H5P.JoubelScoreBar(maxScore, label, helpText, scoreExplanationButtonLabel);
  };

  /**
   * Create Progressbar
   * @method H5P.JoubelUI.createProgressbar
   * @param  {number=}       numSteps The total numer of steps
   * @param {Object} [options] Additional options
   * @param {boolean} [options.disableAria] Disable readspeaker assistance
   * @param {string} [options.progressText] A progress text for describing
   *  current progress out of total progress for readspeakers.
   *  e.g. "Slide :num of :total"
   * @return {H5P.JoubelProgressbar}
   */
  JoubelUI.createProgressbar = function (numSteps, options) {
    return new H5P.JoubelProgressbar(numSteps, options);
  };

  /**
   * Create standard Joubel button
   *
   * @method H5P.JoubelUI.createButton
   * @param {object} params
   *  May hold any properties allowed by jQuery. If href is set, an A tag
   *  is used, if not a button tag is used.
   * @return {H5P.jQuery} The jquery element created
   */
  JoubelUI.createButton = function(params) {
    var type = 'button';
    if (params.href) {
      type = 'a';
    }
    else {
      params.type = 'button';
    }
    if (params.class) {
      params.class += ' h5p-joubelui-button';
    }
    else {
      params.class = 'h5p-joubelui-button';
    }
    return $('<' + type + '/>', params);
  };

  /**
   * Fix for iframe scoll bug in IOS. When focusing an element that doesn't have
   * focus support by default the iframe will scroll the parent frame so that
   * the focused element is out of view. This varies dependening on the elements
   * of the parent frame.
   */
  if (H5P.isFramed && !H5P.hasiOSiframeScrollFix &&
      /iPad|iPhone|iPod/.test(navigator.userAgent)) {
    H5P.hasiOSiframeScrollFix = true;

    // Keep track of original focus function
    var focus = HTMLElement.prototype.focus;

    // Override the original focus
    HTMLElement.prototype.focus = function () {
      // Only focus the element if it supports it natively
      if ( (this instanceof HTMLAnchorElement ||
            this instanceof HTMLInputElement ||
            this instanceof HTMLSelectElement ||
            this instanceof HTMLTextAreaElement ||
            this instanceof HTMLButtonElement ||
            this instanceof HTMLIFrameElement ||
            this instanceof HTMLAreaElement) && // HTMLAreaElement isn't supported by Safari yet.
          !this.getAttribute('role')) { // Focus breaks if a different role has been set
          // In theory this.isContentEditable should be able to recieve focus,
          // but it didn't work when tested.

        // Trigger the original focus with the proper context
        focus.call(this);
      }
    };
  }

  return JoubelUI;
})(H5P.jQuery);
;
H5P.Tooltip = H5P.Tooltip || function() {};

H5P.Question = (function ($, EventDispatcher, JoubelUI) {

  /**
   * Extending this class make it alot easier to create tasks for other
   * content types.
   *
   * @class H5P.Question
   * @extends H5P.EventDispatcher
   * @param {string} type
   */
  function Question(type) {
    var self = this;

    // Inheritance
    EventDispatcher.call(self);

    // Register default section order
    self.order = ['video', 'image', 'audio', 'introduction', 'content', 'explanation', 'feedback', 'scorebar', 'buttons', 'read'];

    // Keep track of registered sections
    var sections = {};

    // Buttons
    var buttons = {};
    var buttonOrder = [];

    // Wrapper when attached
    var $wrapper;

    // Click element
    var clickElement;

    // ScoreBar
    var scoreBar;

    // Keep track of the feedback's visual status.
    var showFeedback;

    // Keep track of which buttons are scheduled for hiding.
    var buttonsToHide = [];

    // Keep track of which buttons are scheduled for showing.
    var buttonsToShow = [];

    // Keep track of the hiding and showing of buttons.
    var toggleButtonsTimer;
    var toggleButtonsTransitionTimer;
    var buttonTruncationTimer;

    // Keeps track of initialization of question
    var initialized = false;

    /**
     * @type {Object} behaviour Behaviour of Question
     * @property {Boolean} behaviour.disableFeedback Set to true to disable feedback section
     */
    var behaviour = {
      disableFeedback: false,
      disableReadSpeaker: false
    };

    // Keeps track of thumb state
    var imageThumb = true;

    // Keeps track of image transitions
    var imageTransitionTimer;

    // Keep track of whether sections is transitioning.
    var sectionsIsTransitioning = false;

    // Keep track of auto play state
    var disableAutoPlay = false;

    // Feedback transition timer
    var feedbackTransitionTimer;

    // Used when reading messages to the user
    var $read, readText;

    /**
     * Register section with given content.
     *
     * @private
     * @param {string} section ID of the section
     * @param {(string|H5P.jQuery)} [content]
     */
    var register = function (section, content) {
      sections[section] = {};
      var $e = sections[section].$element = $('<div/>', {
        'class': 'h5p-question-' + section,
      });
      if (content) {
        $e[content instanceof $ ? 'append' : 'html'](content);
      }
    };

    /**
     * Update registered section with content.
     *
     * @private
     * @param {string} section ID of the section
     * @param {(string|H5P.jQuery)} content
     */
    var update = function (section, content) {
      if (content instanceof $) {
        sections[section].$element.html('').append(content);
      }
      else {
        sections[section].$element.html(content);
      }
    };

    /**
     * Insert element with given ID into the DOM.
     *
     * @private
     * @param {array|Array|string[]} order
     * List with ordered element IDs
     * @param {string} id
     * ID of the element to be inserted
     * @param {Object} elements
     * Maps ID to the elements
     * @param {H5P.jQuery} $container
     * Parent container of the elements
     */
    var insert = function (order, id, elements, $container) {
      // Try to find an element id should be after
      for (var i = 0; i < order.length; i++) {
        if (order[i] === id) {
          // Found our pos
          while (i > 0 &&
          (elements[order[i - 1]] === undefined ||
          !elements[order[i - 1]].isVisible)) {
            i--;
          }
          if (i === 0) {
            // We are on top.
            elements[id].$element.prependTo($container);
          }
          else {
            // Add after element
            elements[id].$element.insertAfter(elements[order[i - 1]].$element);
          }
          elements[id].isVisible = true;
          break;
        }
      }
    };

    /**
     * Make feedback into a popup and position relative to click.
     *
     * @private
     * @param {string} [closeText] Text for the close button
     */
    var makeFeedbackPopup = function (closeText) {
      var $element = sections.feedback.$element;
      var $parent = sections.content.$element;
      var $click = (clickElement != null ? clickElement.$element : null);

      $element.appendTo($parent).addClass('h5p-question-popup');

      if (sections.scorebar) {
        sections.scorebar.$element.appendTo($element);
      }

      $parent.addClass('h5p-has-question-popup');

      // Draw the tail
      var $tail = $('<div/>', {
        'class': 'h5p-question-feedback-tail'
      }).hide()
        .appendTo($parent);

      // Draw the close button
      var $close = $('<div/>', {
        'class': 'h5p-question-feedback-close',
        'tabindex': 0,
        'title': closeText,
        on: {
          click: function (event) {
            $element.remove();
            $tail.remove();
            event.preventDefault();
          },
          keydown: function (event) {
            switch (event.which) {
              case 13: // Enter
              case 32: // Space
                $element.remove();
                $tail.remove();
                event.preventDefault();
            }
          }
        }
      }).hide().appendTo($element);

      if ($click != null) {
        if ($click.hasClass('correct')) {
          $element.addClass('h5p-question-feedback-correct');
          $close.show();
          sections.buttons.$element.hide();
        }
        else {
          sections.buttons.$element.appendTo(sections.feedback.$element);
        }
      }

      positionFeedbackPopup($element, $click);
    };

    /**
     * Position the feedback popup.
     *
     * @private
     * @param {H5P.jQuery} $element Feedback div
     * @param {H5P.jQuery} $click Visual click div
     */
    var positionFeedbackPopup = function ($element, $click) {
      var $container = $element.parent();
      var $tail = $element.siblings('.h5p-question-feedback-tail');
      var popupWidth = $element.outerWidth();
      var popupHeight = setElementHeight($element);
      var space = 15;
      var disableTail = false;
      var positionY = $container.height() / 2 - popupHeight / 2;
      var positionX = $container.width() / 2 - popupWidth / 2;
      var tailX = 0;
      var tailY = 0;
      var tailRotation = 0;

      if ($click != null) {
        // Edge detection for click, takes space into account
        var clickNearTop = ($click[0].offsetTop < space);
        var clickNearBottom = ($click[0].offsetTop + $click.height() > $container.height() - space);
        var clickNearLeft = ($click[0].offsetLeft < space);
        var clickNearRight = ($click[0].offsetLeft + $click.width() > $container.width() - space);

        // Click is not in a corner or close to edge, calculate position normally
        positionX = $click[0].offsetLeft - popupWidth / 2  + $click.width() / 2;
        positionY = $click[0].offsetTop - popupHeight - space;
        tailX = positionX + popupWidth / 2 - $tail.width() / 2;
        tailY = positionY + popupHeight - ($tail.height() / 2);
        tailRotation = 225;

        // If popup is outside top edge, position under click instead
        if (popupHeight + space > $click[0].offsetTop) {
          positionY = $click[0].offsetTop + $click.height() + space;
          tailY = positionY - $tail.height() / 2 ;
          tailRotation = 45;
        }

        // If popup is outside left edge, position left
        if (positionX < 0) {
          positionX = 0;
        }

        // If popup is outside right edge, position right
        if (positionX + popupWidth > $container.width()) {
          positionX = $container.width() - popupWidth;
        }

        // Special cases such as corner clicks, or close to an edge, they override X and Y positions if met
        if (clickNearTop && (clickNearLeft || clickNearRight)) {
          positionX = $click[0].offsetLeft + (clickNearLeft ? $click.width() : -popupWidth);
          positionY = $click[0].offsetTop + $click.height();
          disableTail = true;
        }
        else if (clickNearBottom && (clickNearLeft || clickNearRight)) {
          positionX = $click[0].offsetLeft + (clickNearLeft ? $click.width() : -popupWidth);
          positionY = $click[0].offsetTop - popupHeight;
          disableTail = true;
        }
        else if (!clickNearTop && !clickNearBottom) {
          if (clickNearLeft || clickNearRight) {
            positionY = $click[0].offsetTop - popupHeight / 2 + $click.width() / 2;
            positionX = $click[0].offsetLeft + (clickNearLeft ? $click.width() + space : -popupWidth + -space);
            // Make sure this does not position the popup off screen
            if (positionX < 0) {
              positionX = 0;
              disableTail = true;
            }
            else {
              tailX = positionX + (clickNearLeft ? - $tail.width() / 2 : popupWidth - $tail.width() / 2);
              tailY = positionY + popupHeight / 2 - $tail.height() / 2;
              tailRotation = (clickNearLeft ? 315 : 135);
            }
          }
        }

        // Contain popup from overflowing bottom edge
        if (positionY + popupHeight > $container.height()) {
          positionY = $container.height() - popupHeight;

          if (popupHeight > $container.height() - ($click[0].offsetTop + $click.height() + space)) {
            disableTail = true;
          }
        }
      }
      else {
        disableTail = true;
      }

      // Contain popup from ovreflowing top edge
      if (positionY < 0) {
        positionY = 0;
      }

      $element.css({top: positionY, left: positionX});
      $tail.css({top: tailY, left: tailX});

      if (!disableTail) {
        $tail.css({
          'left': tailX,
          'top': tailY,
          'transform': 'rotate(' + tailRotation + 'deg)'
        }).show();
      }
      else {
        $tail.hide();
      }
    };

    /**
     * Set element max height, used for animations.
     *
     * @param {H5P.jQuery} $element
     */
    var setElementHeight = function ($element) {
      if (!$element.is(':visible')) {
        // No animation
        $element.css('max-height', 'none');
        return;
      }

      // If this element is shown in the popup, we can't set width to 100%,
      // since it already has a width set in CSS
      var isFeedbackPopup = $element.hasClass('h5p-question-popup');

      // Get natural element height
      var $tmp = $element.clone()
        .css({
          'position': 'absolute',
          'max-height': 'none',
          'width': isFeedbackPopup ? '' : '100%'
        })
        .appendTo($element.parent());

      // Need to take margins into account when calculating available space
      var sideMargins = parseFloat($element.css('margin-left'))
        + parseFloat($element.css('margin-right'));
      var tmpElWidth = $tmp.css('width') ? $tmp.css('width') : '100%';
      $tmp.css('width', 'calc(' + tmpElWidth + ' - ' + sideMargins + 'px)');

      // Apply height to element
      var h = Math.round($tmp.get(0).getBoundingClientRect().height);
      var fontSize = parseFloat($element.css('fontSize'));
      var relativeH = h / fontSize;
      $element.css('max-height', relativeH + 'em');
      $tmp.remove();

      if (h > 0 && sections.buttons && sections.buttons.$element === $element) {
        // Make sure buttons section is visible
        showSection(sections.buttons);

        // Resize buttons after resizing button section
        setTimeout(resizeButtons, 150);
      }
      return h;
    };

    /**
     * Does the actual job of hiding the buttons scheduled for hiding.
     *
     * @private
     * @param {boolean} [relocateFocus] Find a new button to focus
     */
    var hideButtons = function (relocateFocus) {
      for (var i = 0; i < buttonsToHide.length; i++) {
        hideButton(buttonsToHide[i].id);
      }
      buttonsToHide = [];

      if (relocateFocus) {
        self.focusButton();
      }
    };

    /**
     * Does the actual hiding.
     * @private
     * @param {string} buttonId
     */
    var hideButton = function (buttonId) {
      // Using detach() vs hide() makes it harder to cheat.
      buttons[buttonId].$element.detach();
      buttons[buttonId].isVisible = false;
    };

    /**
     * Shows the buttons on the next tick. This is to avoid buttons flickering
     * If they're both added and removed on the same tick.
     *
     * @private
     */
    var toggleButtons = function () {
      // If no buttons section, return
      if (sections.buttons === undefined) {
        return;
      }

      // Clear transition timer, reevaluate if buttons will be detached
      clearTimeout(toggleButtonsTransitionTimer);

      // Show buttons
      for (var i = 0; i < buttonsToShow.length; i++) {
        insert(buttonOrder, buttonsToShow[i].id, buttons, sections.buttons.$element);
        buttons[buttonsToShow[i].id].isVisible = true;
      }
      buttonsToShow = [];

      // Hide buttons
      var numToHide = 0;
      var relocateFocus = false;
      for (var j = 0; j < buttonsToHide.length; j++) {
        var button = buttons[buttonsToHide[j].id];
        if (button.isVisible) {
          numToHide += 1;
        }
        if (button.$element.is(':focus')) {
          // Move focus to the first visible button.
          relocateFocus = true;
        }
      }

      var animationTimer = 150;
      if (sections.feedback && sections.feedback.$element.hasClass('h5p-question-popup')) {
        animationTimer = 0;
      }

      if (numToHide === sections.buttons.$element.children().length) {
        // All buttons are going to be hidden. Hide container using transition.
        hideSection(sections.buttons);
        // Detach buttons
        hideButtons(relocateFocus);
      }
      else {
        hideButtons(relocateFocus);

        // Show button section
        if (!sections.buttons.$element.is(':empty')) {
          showSection(sections.buttons);
          setElementHeight(sections.buttons.$element);

          // Trigger resize after animation
          toggleButtonsTransitionTimer = setTimeout(function () {
            self.trigger('resize');
          }, animationTimer);
        }

        // Resize buttons to fit container
        resizeButtons();
      }

      toggleButtonsTimer = undefined;
    };

    /**
     * Allows for scaling of the question image.
     */
    var scaleImage = function () {
      var $imgSection = sections.image.$element;
      clearTimeout(imageTransitionTimer);

      // Add this here to avoid initial transition of the image making
      // content overflow. Alternatively we need to trigger a resize.
      $imgSection.addClass('animatable');

      if (imageThumb) {

        // Expand image
        $(this).attr('aria-expanded', true);
        $imgSection.addClass('h5p-question-image-fill-width');
        imageThumb = false;

        imageTransitionTimer = setTimeout(function () {
          self.trigger('resize');
        }, 600);
      }
      else {

        // Scale down image
        $(this).attr('aria-expanded', false);
        $imgSection.removeClass('h5p-question-image-fill-width');
        imageThumb = true;

        imageTransitionTimer = setTimeout(function () {
          self.trigger('resize');
        }, 600);
      }
    };

    /**
     * Get scrollable ancestor of element
     *
     * @private
     * @param {H5P.jQuery} $element
     * @param {Number} [currDepth=0] Current recursive calls to ancestor, stop at maxDepth
     * @param {Number} [maxDepth=5] Maximum depth for finding ancestor.
     * @returns {H5P.jQuery} Parent element that is scrollable
     */
    var findScrollableAncestor = function ($element, currDepth, maxDepth) {
      if (!currDepth) {
        currDepth = 0;
      }
      if (!maxDepth) {
        maxDepth = 5;
      }
      // Check validation of element or if we have reached document root
      if (!$element || !($element instanceof $) || document === $element.get(0) || currDepth >= maxDepth) {
        return;
      }

      if ($element.css('overflow-y') === 'auto') {
        return $element;
      }
      else {
        return findScrollableAncestor($element.parent(), currDepth + 1, maxDepth);
      }
    };

    /**
     * Scroll to bottom of Question.
     *
     * @private
     */
    var scrollToBottom = function () {
      if (!$wrapper || ($wrapper.hasClass('h5p-standalone') && !H5P.isFullscreen)) {
        return; // No scroll
      }

      var scrollableAncestor = findScrollableAncestor($wrapper);

      // Scroll to bottom of scrollable ancestor
      if (scrollableAncestor) {
        scrollableAncestor.animate({
          scrollTop: $wrapper.css('height')
        }, "slow");
      }
    };

    /**
     * Resize buttons to fit container width
     *
     * @private
     */
    var resizeButtons = function () {
      if (!buttons || !sections.buttons) {
        return;
      }

      var go = function () {
        // Don't do anything if button elements are not visible yet
        if (!sections.buttons.$element.is(':visible')) {
          return;
        }

        // Width of all buttons
        var buttonsWidth = {
          max: 0,
          min: 0,
          current: 0
        };

        for (var i in buttons) {
          var button = buttons[i];
          if (button.isVisible) {
            setButtonWidth(buttons[i]);
            buttonsWidth.max += button.width.max;
            buttonsWidth.min += button.width.min;
            buttonsWidth.current += button.isTruncated ? button.width.min : button.width.max;
          }
        }

        var makeButtonsFit = function (availableWidth) {
          if (buttonsWidth.max < availableWidth) {
            // It is room for everyone on the right side of the score bar (without truncating)
            if (buttonsWidth.max !== buttonsWidth.current) {
              // Need to make everyone big
              restoreButtonLabels(buttonsWidth.current, availableWidth);
            }
            return true;
          }
          else if (buttonsWidth.min < availableWidth) {
            // Is it room for everyone on the right side of the score bar with truncating?
            if (buttonsWidth.current > availableWidth) {
              removeButtonLabels(buttonsWidth.current, availableWidth);
            }
            else {
              restoreButtonLabels(buttonsWidth.current, availableWidth);
            }
            return true;
          }
          return false;
        };

        toggleFullWidthScorebar(false);

        var buttonSectionWidth = Math.floor(sections.buttons.$element.width()) - 1;

        if (!makeButtonsFit(buttonSectionWidth)) {
          // If we get here we need to wrap:
          toggleFullWidthScorebar(true);
          buttonSectionWidth = Math.floor(sections.buttons.$element.width()) - 1;
          makeButtonsFit(buttonSectionWidth);
        }
      };

      // If visible, resize right away
      if (sections.buttons.$element.is(':visible')) {
        go();
      }
      else { // If not visible, try on the next tick
        // Clear button truncation timer if within a button truncation function
        if (buttonTruncationTimer) {
          clearTimeout(buttonTruncationTimer);
        }
        buttonTruncationTimer = setTimeout(function () {
          buttonTruncationTimer = undefined;
          go();
        }, 0);
      }
    };

    var toggleFullWidthScorebar = function (enabled) {
      if (sections.scorebar &&
          sections.scorebar.$element &&
          sections.scorebar.$element.hasClass('h5p-question-visible')) {
        sections.buttons.$element.addClass('has-scorebar');
        sections.buttons.$element.toggleClass('wrap', enabled);
        sections.scorebar.$element.toggleClass('full-width', enabled);
      }
      else {
        sections.buttons.$element.removeClass('has-scorebar');
      }
    };

    /**
     * Remove button labels until they use less than max width.
     *
     * @private
     * @param {Number} buttonsWidth Total width of all buttons
     * @param {Number} maxButtonsWidth Max width allowed for buttons
     */
    var removeButtonLabels = function (buttonsWidth, maxButtonsWidth) {
      // Reverse traversal
      for (var i = buttonOrder.length - 1; i >= 0; i--) {
        var buttonId = buttonOrder[i];
        var button = buttons[buttonId];
        if (!button.isTruncated && button.isVisible) {
          var $button = button.$element;
          buttonsWidth -= button.width.max - button.width.min;
          // Set tooltip (needed by H5P.Tooltip)
          let buttonText = $button.text();
          $button.attr('data-tooltip', buttonText);

          // Use button text as aria label if a specific one isn't provided
          if (!button.ariaLabel) {
            $button.attr('aria-label', buttonText);
          }
          // Remove label
          $button.html('').addClass('truncated');
          button.isTruncated = true;
          if (buttonsWidth <= maxButtonsWidth) {
            // Buttons are small enough.
            return;
          }
        }
      }
    };

    /**
     * Restore button labels until it fills maximum possible width without exceeding the max width.
     *
     * @private
     * @param {Number} buttonsWidth Total width of all buttons
     * @param {Number} maxButtonsWidth Max width allowed for buttons
     */
    var restoreButtonLabels = function (buttonsWidth, maxButtonsWidth) {
      for (var i = 0; i < buttonOrder.length; i++) {
        var buttonId = buttonOrder[i];
        var button = buttons[buttonId];
        if (button.isTruncated && button.isVisible) {
          // Calculate new total width of buttons with a static pixel for consistency cross-browser
          buttonsWidth += button.width.max - button.width.min + 1;

          if (buttonsWidth > maxButtonsWidth) {
            return;
          }
          // Restore label
          button.$element.html(button.text);

          // Remove tooltip (used by H5P.Tooltip)
          button.$element.removeAttr('data-tooltip');

          // Remove aria-label if a specific one isn't provided
          if (!button.ariaLabel) {
            button.$element.removeAttr('aria-label');
          }

          button.$element.removeClass('truncated');
          button.isTruncated = false;
        }
      }
    };

    /**
     * Helper function for finding index of keyValue in array
     *
     * @param {String} keyValue Value to be found
     * @param {String} key In key
     * @param {Array} array In array
     * @returns {number}
     */
    var existsInArray = function (keyValue, key, array) {
      var i;
      for (i = 0; i < array.length; i++) {
        if (array[i][key] === keyValue) {
          return i;
        }
      }
      return -1;
    };

    /**
     * Show a section
     * @param {Object} section
     */
    var showSection = function (section) {
      section.$element.addClass('h5p-question-visible');
      section.isVisible = true;
    };

    /**
     * Hide a section
     * @param {Object} section
     */
    var hideSection = function (section) {
      section.$element.css('max-height', '');
      section.isVisible = false;

      setTimeout(function () {
        // Only hide if section hasn't been set to visible in the meantime
        if (!section.isVisible) {
          section.$element.removeClass('h5p-question-visible');
        }
      }, 150);
    };

    /**
     * Set behaviour for question.
     *
     * @param {Object} options An object containing behaviour that will be extended by Question
     */
    self.setBehaviour = function (options) {
      $.extend(behaviour, options);
    };

    /**
     * A video to display above the task.
     *
     * @param {object} params
     */
    self.setVideo = function (params) {
      sections.video = {
        $element: $('<div/>', {
          'class': 'h5p-question-video'
        })
      };

      if (disableAutoPlay && params.params.playback) {
        params.params.playback.autoplay = false;
      }

      // Never fit to wrapper
      if (!params.params.visuals) {
        params.params.visuals = {};
      }
      params.params.visuals.fit = false;
      sections.video.instance = H5P.newRunnable(params, self.contentId, sections.video.$element, true);
      var fromVideo = false; // Hack to avoid never ending loop
      sections.video.instance.on('resize', function () {
        fromVideo = true;
        self.trigger('resize');
        fromVideo = false;
      });
      self.on('resize', function () {
        if (!fromVideo) {
          sections.video.instance.trigger('resize');
        }
      });

      return self;
    };

    /**
     * An audio player to display above the task.
     *
     * @param {object} params
     */
    self.setAudio = function (params) {
      params.params = params.params || {};

      sections.audio = {
        $element: $('<div/>', {
          'class': 'h5p-question-audio',
        })
      };

      if (disableAutoPlay) {
        params.params.autoplay = false;
      }
      else if (params.params.playerMode === 'transparent') {
        params.params.autoplay = true; // false doesn't make sense for transparent audio
      }

      sections.audio.instance = H5P.newRunnable(params, self.contentId, sections.audio.$element, true);
      // The height value that is set by H5P.Audio is counter-productive here.
      if (sections.audio.instance.audio) {
        sections.audio.instance.audio.style.height = '';
      }

      return self;
    };

    /**
     * Will stop any playback going on in the task.
     */
    self.pause = function () {
      if (sections.video && sections.video.isVisible) {
        sections.video.instance.pause();
      }
      if (sections.audio && sections.audio.isVisible) {
        sections.audio.instance.pause();
      }
    };

    /**
     * Start playback of video
     */
    self.play = function () {
      if (sections.video && sections.video.isVisible) {
        sections.video.instance.play();
      }
      if (sections.audio && sections.audio.isVisible) {
        sections.audio.instance.play();
      }
    };

    /**
     * Disable auto play, useful in editors.
     */
    self.disableAutoPlay = function () {
      disableAutoPlay = true;
    };

    /**
     * Process HTML escaped string for use as attribute value,
     * e.g. for alt text or title attributes.
     *
     * @param {string} value
     * @return {string} WARNING! Do NOT use for innerHTML.
     */
    self.massageAttributeOutput = function (value) {
      const dparser = new DOMParser().parseFromString(value, 'text/html');
      const div = document.createElement('div');
      div.innerHTML = dparser.documentElement.textContent;;
      return div.textContent || div.innerText || '';
    };

    /**
     * Add task image.
     *
     * @param {string} path Relative
     * @param {Object} [options] Options object
     * @param {string} [options.alt] Text representation
     * @param {string} [options.title] Hover text
     * @param {Boolean} [options.disableImageZooming] Set as true to disable image zooming
     * @param {string} [options.expandImage] Localization strings
     * @param {string} [options.minimizeImage] Localization string

     */
    self.setImage = function (path, options) {
      options = options ? options : {};
      sections.image = {};
      // Image container
      sections.image.$element = $('<div/>', {
        'class': 'h5p-question-image h5p-question-image-fill-width'
      });

      // Inner wrap
      var $imgWrap = $('<div/>', {
        'class': 'h5p-question-image-wrap',
        appendTo: sections.image.$element
      });

      // Image element
      var $img = $('<img/>', {
        src: H5P.getPath(path, self.contentId),
        alt: (options.alt === undefined ? '' : self.massageAttributeOutput(options.alt)),
        title: (options.title === undefined ? '' : self.massageAttributeOutput(options.title)),
        on: {
          load: function () {
            self.trigger('imageLoaded', this);
            self.trigger('resize');
          }
        },
        appendTo: $imgWrap
      });

      // Disable image zooming
      if (options.disableImageZooming) {
        $img.css('maxHeight', 'none');

        // Make sure we are using the correct amount of width at all times
        var determineImgWidth = function () {

          // Remove margins if natural image width is bigger than section width
          var imageSectionWidth = sections.image.$element.get(0).getBoundingClientRect().width;

          // Do not transition, for instant measurements
          $imgWrap.css({
            '-webkit-transition': 'none',
            'transition': 'none'
          });

          // Margin as translateX on both sides of image.
          var diffX = 2 * ($imgWrap.get(0).getBoundingClientRect().left -
            sections.image.$element.get(0).getBoundingClientRect().left);

          if ($img.get(0).naturalWidth >= imageSectionWidth - diffX) {
            sections.image.$element.addClass('h5p-question-image-fill-width');
          }
          else { // Use margin for small res images
            sections.image.$element.removeClass('h5p-question-image-fill-width');
          }

          // Reset transition rules
          $imgWrap.css({
            '-webkit-transition': '',
            'transition': ''
          });
        };

        // Determine image width
        if ($img.is(':visible')) {
          determineImgWidth();
        }
        else {
          $img.on('load', determineImgWidth);
        }

        // Skip adding zoom functionality
        return;
      }

      const setAriaLabel = () => {
        const ariaLabel = $imgWrap.attr('aria-expanded') === 'true'
          ? options.minimizeImage 
          : options.expandImage;
          
          $imgWrap.attr('aria-label', `${ariaLabel} ${options.alt}`);
        };

      var sizeDetermined = false;
      var determineSize = function () {
        if (sizeDetermined || !$img.is(':visible')) {
          return; // Try again next time.
        }

        $imgWrap.addClass('h5p-question-image-scalable')
          .attr('aria-expanded', false)
          .attr('role', 'button')
          .attr('tabIndex', '0')
          .on('click', function (event) {
            if (event.which === 1) {
              scaleImage.apply(this); // Left mouse button click
              setAriaLabel();
            }
          }).on('keypress', function (event) {
            if (event.which === 32) {
              event.preventDefault(); // Prevent default behaviour; page scroll down
              scaleImage.apply(this); // Space bar pressed
              setAriaLabel();
            }
          });

        setAriaLabel();

        sections.image.$element.removeClass('h5p-question-image-fill-width');

        sizeDetermined  = true; // Prevent any futher events
      };

      self.on('resize', determineSize);

      return self;
    };

    /**
     * Add the introduction section.
     *
     * @param {(string|H5P.jQuery)} content
     */
    self.setIntroduction = function (content) {
      register('introduction', content);

      return self;
    };

    /**
     * Add the content section.
     *
     * @param {(string|H5P.jQuery)} content
     * @param {Object} [options]
     * @param {string} [options.class]
     */
    self.setContent = function (content, options) {
      register('content', content);

      if (options && options.class) {
        sections.content.$element.addClass(options.class);
      }

      return self;
    };

    /**
     * Force readspeaker to read text. Useful when you have to use
     * setTimeout for animations.
     */
    self.read = function (content) {
      if (!$read) {
        return; // Not ready yet
      }

      if (readText) {
        // Combine texts if called multiple times
        readText += (readText.substr(-1, 1) === '.' ? ' ' : '. ') + content;
      }
      else {
        readText = content;
      }

      // Set text
      $read.html(readText);

      setTimeout(function () {
        // Stop combining when done reading
        readText = null;
        $read.html('');
      }, 100);
    };

    /**
     * Read feedback
     */
    self.readFeedback = function () {
      var invalidFeedback =
        behaviour.disableReadSpeaker ||
        !showFeedback ||
        !sections.feedback ||
        !sections.feedback.$element;

      if (invalidFeedback) {
        return;
      }

      var $feedbackText = $('.h5p-question-feedback-content-text', sections.feedback.$element);
      if ($feedbackText && $feedbackText.html() && $feedbackText.html().length) {
        self.read($feedbackText.html());
      }
    };

    /**
     * Remove feedback
     *
     * @return {H5P.Question}
     */
    self.removeFeedback = function () {

      clearTimeout(feedbackTransitionTimer);

      if (sections.feedback && showFeedback) {

        showFeedback = false;

        // Hide feedback & scorebar
        hideSection(sections.scorebar);
        hideSection(sections.feedback);

        sectionsIsTransitioning = true;

        // Detach after transition
        feedbackTransitionTimer = setTimeout(function () {
          // Avoiding Transition.onTransitionEnd since it will register multiple events, and there's no way to cancel it if the transition changes back to "show" while the animation is happening.
          if (!showFeedback) {
            sections.feedback.$element.children().detach();
            sections.scorebar.$element.children().detach();

            // Trigger resize after animation
            self.trigger('resize');
          }
          sectionsIsTransitioning = false;
          scoreBar.setScore(0);
        }, 150);

        if ($wrapper) {
          $wrapper.find('.h5p-question-feedback-tail').remove();
        }
      }

      return self;
    };

    /**
     * Set feedback message.
     *
     * @param {string} [content]
     * @param {number} score The score
     * @param {number} maxScore The maximum score for this question
     * @param {string} [scoreBarLabel] Makes it easier for readspeakers to identify the scorebar
     * @param {string} [helpText] Help text that describes the score inside a tip icon
     * @param {object} [popupSettings] Extra settings for popup feedback
     * @param {boolean} [popupSettings.showAsPopup] Should the feedback display as popup?
     * @param {string} [popupSettings.closeText] Translation for close button text
     * @param {object} [popupSettings.click] Element representing where user clicked on screen
     */
    self.setFeedback = function (content, score, maxScore, scoreBarLabel, helpText, popupSettings, scoreExplanationButtonLabel) {
      // Feedback is disabled
      if (behaviour.disableFeedback) {
        return self;
      }

      // Need to toggle buttons right away to avoid flickering/blinking
      // Note: This means content types should invoke hide/showButton before setFeedback
      toggleButtons();

      clickElement = (popupSettings != null && popupSettings.click != null ? popupSettings.click : null);
      clearTimeout(feedbackTransitionTimer);

      var $feedback = $('<div>', {
        'class': 'h5p-question-feedback-container'
      });

      var $feedbackContent = $('<div>', {
        'class': 'h5p-question-feedback-content'
      }).appendTo($feedback);

      // Feedback text
      $('<div>', {
        'class': 'h5p-question-feedback-content-text',
        'html': content
      }).appendTo($feedbackContent);

      var $scorebar = $('<div>', {
        'class': 'h5p-question-scorebar-container'
      });
      if (scoreBar === undefined) {
        scoreBar = JoubelUI.createScoreBar(maxScore, scoreBarLabel, helpText, scoreExplanationButtonLabel);
      }
      scoreBar.appendTo($scorebar);

      $feedbackContent.toggleClass('has-content', content !== undefined && content.length > 0);

      // Feedback for readspeakers
      if (!behaviour.disableReadSpeaker && scoreBarLabel) {
        self.read(scoreBarLabel.replace(':num', score).replace(':total', maxScore) + '. ' + (content ? content : ''));
      }

      showFeedback = true;
      if (sections.feedback) {
        // Update section
        update('feedback', $feedback);
        update('scorebar', $scorebar);
      }
      else {
        // Create section
        register('feedback', $feedback);
        register('scorebar', $scorebar);
        if (initialized && $wrapper) {
          insert(self.order, 'feedback', sections, $wrapper);
          insert(self.order, 'scorebar', sections, $wrapper);
        }
      }

      showSection(sections.feedback);
      showSection(sections.scorebar);

      resizeButtons();

      if (popupSettings != null && popupSettings.showAsPopup == true) {
        makeFeedbackPopup(popupSettings.closeText);
        scoreBar.setScore(score);
      }
      else {
        // Show feedback section
        feedbackTransitionTimer = setTimeout(function () {
          setElementHeight(sections.feedback.$element);
          setElementHeight(sections.scorebar.$element);
          sectionsIsTransitioning = true;

          // Scroll to bottom after showing feedback
          scrollToBottom();

          // Trigger resize after animation
          feedbackTransitionTimer = setTimeout(function () {
            sectionsIsTransitioning = false;
            self.trigger('resize');
            scoreBar.setScore(score);
          }, 150);
        }, 0);
      }

      return self;
    };

    /**
     * Set feedback content (no animation).
     *
     * @param {string} content
     * @param {boolean} [extendContent] True will extend content, instead of replacing it
     */
    self.updateFeedbackContent = function (content, extendContent) {
      if (sections.feedback && sections.feedback.$element) {

        if (extendContent) {
          content = $('.h5p-question-feedback-content', sections.feedback.$element).html() + ' ' + content;
        }

        // Update feedback content html
        $('.h5p-question-feedback-content', sections.feedback.$element).html(content).addClass('has-content');

        // Make sure the height is correct
        setElementHeight(sections.feedback.$element);

        // Need to trigger resize when feedback has finished transitioning
        setTimeout(self.trigger.bind(self, 'resize'), 150);
      }

      return self;
    };

    /**
     * Set the content of the explanation / feedback panel
     *
     * @param {Object} data
     * @param {string} data.correct
     * @param {string} data.wrong
     * @param {string} data.text
     * @param {string} title Title for explanation panel
     *
     * @return {H5P.Question}
     */
    self.setExplanation = function (data, title) {
      if (data) {
        var explainer = new H5P.Question.Explainer(title, data);

        if (sections.explanation) {
          // Update section
          update('explanation', explainer.getElement());
        }
        else {
          register('explanation', explainer.getElement());

          if (initialized && $wrapper) {
            insert(self.order, 'explanation', sections, $wrapper);
          }
        }
      }
      else if (sections.explanation) {
        // Hide explanation section
        sections.explanation.$element.children().detach();
      }

      return self;
    };

    /**
     * Checks to see if button is registered.
     *
     * @param {string} id
     * @returns {boolean}
     */
    self.hasButton = function (id) {
      return (buttons[id] !== undefined);
    };

    /**
     * @typedef {Object} ConfirmationDialog
     * @property {boolean} [enable] Must be true to show confirmation dialog
     * @property {Object} [instance] Instance that uses confirmation dialog
     * @property {jQuery} [$parentElement] Append to this element.
     * @property {Object} [l10n] Translatable fields
     * @property {string} [l10n.header] Header text
     * @property {string} [l10n.body] Body text
     * @property {string} [l10n.cancelLabel]
     * @property {string} [l10n.confirmLabel]
     */

    /**
     * Register buttons for the task.
     *
     * @param {string} id
     * @param {string} text label
     * @param {function} clicked
     * @param {boolean} [visible=true]
     * @param {Object} [options] Options for button
     * @param {Object} [extras] Extra options
     * @param {ConfirmationDialog} [extras.confirmationDialog] Confirmation dialog
     * @param {Object} [extras.contentData] Content data
     * @params {string} [extras.textIfSubmitting] Text to display if submitting
     */
    self.addButton = function (id, text, clicked, visible, options, extras) {
      if (buttons[id]) {
        return self; // Already registered
      }

      if (sections.buttons === undefined)  {
        // We have buttons, register wrapper
        register('buttons');
        if (initialized) {
          insert(self.order, 'buttons', sections, $wrapper);
        }
      }

      extras = extras || {};
      extras.confirmationDialog = extras.confirmationDialog || {};
      options = options || {};

      var confirmationDialog =
        self.addConfirmationDialogToButton(extras.confirmationDialog, clicked);

      /**
       * Handle button clicks through both mouse and keyboard
       * @private
       */
      var handleButtonClick = function () {
        if (extras.confirmationDialog.enable && confirmationDialog) {
          // Show popups section if used
          if (!extras.confirmationDialog.$parentElement) {
            sections.popups.$element.removeClass('hidden');
          }
          confirmationDialog.show($e.position().top);
        }
        else {
          clicked();
        }
      };

      const isSubmitting = extras.contentData && extras.contentData.standalone
        && (extras.contentData.isScoringEnabled || extras.contentData.isReportingEnabled);

      if (isSubmitting && extras.textIfSubmitting) {
        text = extras.textIfSubmitting;
      }

      buttons[id] = {
        isTruncated: false,
        text: text,
        isVisible: false,
        ariaLabel: options['aria-label']
      };

      // The button might be <button> or <a>
      // (dependent on options.href set or not)
      var isAnchorTag = (options.href !== undefined);
      var $e = buttons[id].$element = JoubelUI.createButton($.extend({
        'class': 'h5p-question-' + id,
        html: text,
        on: {
          click: function (event) {
            handleButtonClick();
            if (isAnchorTag) {
              event.preventDefault();
            }
          }
        }
      }, options));
      buttonOrder.push(id);

      H5P.Tooltip($e.get(0), {tooltipSource: 'data-tooltip'});

      // The button might be <button> or <a>. If <a>, the space key is not
      // triggering the click event, must therefore handle this here:
      if (isAnchorTag) {
        $e.on('keypress', function (event) {
          if (event.which === 32) { // Space
            handleButtonClick();
            event.preventDefault();
          }
        });
      }

      if (visible === undefined || visible) {
        // Button should be visible
        $e.appendTo(sections.buttons.$element);
        buttons[id].isVisible = true;
        showSection(sections.buttons);
      }

      return self;
    };

    var setButtonWidth = function (button) {
      var $button = button.$element;
      var $tmp = $button.clone()
        .css({
          'position': 'absolute',
          'white-space': 'nowrap',
          'max-width': 'none'
        }).removeClass('truncated')
        .html(button.text)
        .appendTo($button.parent());

      // Calculate max width (button including text)
      button.width = {
        max: Math.ceil($tmp.outerWidth() + parseFloat($tmp.css('margin-left')) + parseFloat($tmp.css('margin-right')))
      };

      // Calculate min width (truncated, icon only)
      $tmp.html('').addClass('truncated');
      button.width.min = Math.ceil($tmp.outerWidth() + parseFloat($tmp.css('margin-left')) + parseFloat($tmp.css('margin-right')));
      $tmp.remove();
    };

    /**
     * Add confirmation dialog to button
     * @param {ConfirmationDialog} options
     *  A confirmation dialog that will be shown before click handler of button
     *  is triggered
     * @param {function} clicked
     *  Click handler of button
     * @return {H5P.ConfirmationDialog|undefined}
     *  Confirmation dialog if enabled
     */
    self.addConfirmationDialogToButton = function (options, clicked) {
      options = options || {};

      if (!options.enable) {
        return;
      }

      // Confirmation dialog
      var confirmationDialog = new H5P.ConfirmationDialog({
        instance: options.instance,
        headerText: options.l10n.header,
        dialogText: options.l10n.body,
        cancelText: options.l10n.cancelLabel,
        confirmText: options.l10n.confirmLabel
      });

      // Determine parent element
      if (options.$parentElement) {
        const parentElement = options.$parentElement.get(0);
        let dialogParent;
        // If using h5p-content, dialog will not appear on embedded fullscreen
        if (parentElement.classList.contains('h5p-content')) {
          dialogParent = parentElement.querySelector('.h5p-container');
        }

        confirmationDialog.appendTo(dialogParent ?? parentElement);
      }
      else {

        // Create popup section and append to that
        if (sections.popups === undefined) {
          register('popups');
          if (initialized) {
            insert(self.order, 'popups', sections, $wrapper);
          }
          sections.popups.$element.addClass('hidden');
          self.order.push('popups');
        }
        confirmationDialog.appendTo(sections.popups.$element.get(0));
      }

      // Add event listeners
      confirmationDialog.on('confirmed', function () {
        if (!options.$parentElement) {
          sections.popups.$element.addClass('hidden');
        }
        clicked();

        // Trigger to content type
        self.trigger('confirmed');
      });

      confirmationDialog.on('canceled', function () {
        if (!options.$parentElement) {
          sections.popups.$element.addClass('hidden');
        }
        // Trigger to content type
        self.trigger('canceled');
      });

      return confirmationDialog;
    };

    /**
     * Show registered button with given identifier.
     *
     * @param {string} id
     * @param {Number} [priority]
     */
    self.showButton = function (id, priority) {
      var aboutToBeHidden = existsInArray(id, 'id', buttonsToHide) !== -1;
      if (buttons[id] === undefined || (buttons[id].isVisible === true && !aboutToBeHidden)) {
        return self;
      }

      priority = priority || 0;

      // Skip if already being shown
      var indexToShow = existsInArray(id, 'id', buttonsToShow);
      if (indexToShow !== -1) {

        // Update priority
        if (buttonsToShow[indexToShow].priority < priority) {
          buttonsToShow[indexToShow].priority = priority;
        }

        return self;
      }

      // Check if button is going to be hidden on next tick
      var exists = existsInArray(id, 'id', buttonsToHide);
      if (exists !== -1) {

        // Skip hiding if higher priority
        if (buttonsToHide[exists].priority <= priority) {
          buttonsToHide.splice(exists, 1);
          buttonsToShow.push({id: id, priority: priority});
        }

      } // If button is not shown
      else if (!buttons[id].$element.is(':visible')) {

        // Show button on next tick
        buttonsToShow.push({id: id, priority: priority});
      }

      if (!toggleButtonsTimer) {
        toggleButtonsTimer = setTimeout(toggleButtons, 0);
      }

      return self;
    };

    /**
     * Hide registered button with given identifier.
     *
     * @param {string} id
     * @param {number} [priority]
     */
    self.hideButton = function (id, priority) {
      var aboutToBeShown = existsInArray(id, 'id', buttonsToShow) !== -1;
      if (buttons[id] === undefined || (buttons[id].isVisible === false && !aboutToBeShown)) {
        return self;
      }

      priority = priority || 0;

      // Skip if already being hidden
      var indexToHide = existsInArray(id, 'id', buttonsToHide);
      if (indexToHide !== -1) {

        // Update priority
        if (buttonsToHide[indexToHide].priority < priority) {
          buttonsToHide[indexToHide].priority = priority;
        }

        return self;
      }

      // Check if buttons is going to be shown on next tick
      var exists = existsInArray(id, 'id', buttonsToShow);
      if (exists !== -1) {

        // Skip showing if higher priority
        if (buttonsToShow[exists].priority <= priority) {
          buttonsToShow.splice(exists, 1);
          buttonsToHide.push({id: id, priority: priority});
        }
      }
      else if (!buttons[id].$element.is(':visible')) {

        // Make sure it is detached in case the container is hidden.
        hideButton(id);
      }
      else {

        // Hide button on next tick.
        buttonsToHide.push({id: id, priority: priority});
      }

      if (!toggleButtonsTimer) {
        toggleButtonsTimer = setTimeout(toggleButtons, 0);
      }

      return self;
    };

    /**
     * Set focus to the given button. If no button is given the first visible
     * button gets focused. This is useful if you lose focus.
     *
     * @param {string} [id]
     */
    self.focusButton = function (id) {
      if (id === undefined) {
        // Find first button that is visible.
        for (var i = 0; i < buttonOrder.length; i++) {
          var button = buttons[buttonOrder[i]];
          if (button && button.isVisible) {
            // Give that button focus
            button.$element.focus();
            break;
          }
        }
      }
      else if (buttons[id] && buttons[id].$element.is(':visible')) {
        // Set focus to requested button
        buttons[id].$element.focus();
      }

      return self;
    };

    /**
     * Toggle readspeaker functionality
     * @param {boolean} [disable] True to disable, false to enable.
     */
    self.toggleReadSpeaker = function (disable) {
      behaviour.disableReadSpeaker = disable || !behaviour.disableReadSpeaker;
    };

    /**
     * Set new element for section.
     *
     * @param {String} id
     * @param {H5P.jQuery} $element
     */
    self.insertSectionAtElement = function (id, $element) {
      if (sections[id] === undefined) {
        register(id);
      }
      sections[id].parent = $element;

      // Insert section if question is not initialized
      if (!initialized) {
        insert([id], id, sections, $element);
      }

      return self;
    };

    /**
     * Attach content to given container.
     *
     * @param {H5P.jQuery} $container
     */
    self.attach = function ($container) {
      if (self.isRoot()) {
        self.setActivityStarted();
      }

      // The first time we attach we also create our DOM elements.
      if ($wrapper === undefined) {
        if (self.registerDomElements !== undefined &&
           (self.registerDomElements instanceof Function ||
           typeof self.registerDomElements === 'function')) {

          // Give the question type a chance to register before attaching
          self.registerDomElements();
        }

        // Create section for reading messages
        $read = $('<div/>', {
          'aria-live': 'polite',
          'class': 'h5p-hidden-read'
        });
        register('read', $read);
        self.trigger('registerDomElements');
      }

      // Prepare container
      $wrapper = $container;
      $container.html('')
        .addClass('h5p-question h5p-' + type);

      // Add sections in given order
      var $sections = [];
      for (var i = 0; i < self.order.length; i++) {
        var section = self.order[i];
        if (sections[section]) {
          if (sections[section].parent) {
            // Section has a different parent
            sections[section].$element.appendTo(sections[section].parent);
          }
          else {
            $sections.push(sections[section].$element);
          }
          sections[section].isVisible = true;
        }
      }

      // Only append once to DOM for optimal performance
      $container.append($sections);

      // Let others react to dom changes
      self.trigger('domChanged', {
        '$target': $container,
        'library': self.libraryInfo.machineName,
        'contentId': self.contentId,
        'key': 'newLibrary'
      }, {'bubbles': true, 'external': true});

      // ??
      initialized = true;

      return self;
    };

    /**
     * Detach all sections from their parents
     */
    self.detachSections = function () {
      // Deinit Question
      initialized = false;

      // Detach sections
      for (var section in sections) {
        sections[section].$element.detach();
      }

      return self;
    };

    // Listen for resize
    self.on('resize', function () {
      // Allow elements to attach and set their height before resizing
      if (!sectionsIsTransitioning && sections.feedback && showFeedback) {
        // Resize feedback to fit
        setElementHeight(sections.feedback.$element);
      }

      // Re-position feedback popup if in use
      var $element = sections.feedback;
      var $click = clickElement;

      if ($element != null && $element.$element != null && $click != null && $click.$element != null) {
        setTimeout(function () {
          positionFeedbackPopup($element.$element, $click.$element);
        }, 10);
      }

      resizeButtons();
    });
  }

  // Inheritance
  Question.prototype = Object.create(EventDispatcher.prototype);
  Question.prototype.constructor = Question;

  /**
   * Determine the overall feedback to display for the question.
   * Returns empty string if no matching range is found.
   *
   * @param {Object[]} feedbacks
   * @param {number} scoreRatio
   * @return {string}
   */
  Question.determineOverallFeedback = function (feedbacks, scoreRatio) {
    scoreRatio = Math.floor(scoreRatio * 100);

    for (var i = 0; i < feedbacks.length; i++) {
      var feedback = feedbacks[i];
      var hasFeedback = (feedback.feedback !== undefined && feedback.feedback.trim().length !== 0);

      if (feedback.from <= scoreRatio && feedback.to >= scoreRatio && hasFeedback) {
        return feedback.feedback;
      }
    }

    return '';
  };

  return Question;
})(H5P.jQuery, H5P.EventDispatcher, H5P.JoubelUI);
;
H5P.Question.Explainer = (function ($) {
  /**
   * Constructor
   *
   * @class
   * @param {string} title
   * @param {array} explanations
   */
  function Explainer(title, explanations) {
    var self = this;

    /**
     * Create the DOM structure
     */
    var createHTML = function () {
      self.$explanation = $('<div>', {
        'class': 'h5p-question-explanation-container'
      });

      // Add title:
      $('<div>', {
        'class': 'h5p-question-explanation-title',
        role: 'heading',
        html: title,
        appendTo: self.$explanation
      });

      var $explanationList = $('<ul>', {
        'class': 'h5p-question-explanation-list',
        appendTo: self.$explanation
      });

      for (var i = 0; i < explanations.length; i++) {
        var feedback = explanations[i];
        var $explanationItem = $('<li>', {
          'class': 'h5p-question-explanation-item',
          appendTo: $explanationList
        });

        var $content = $('<div>', {
          'class': 'h5p-question-explanation-status'
        });

        if (feedback.correct) {
          $('<span>', {
            'class': 'h5p-question-explanation-correct',
            html: feedback.correct,
            appendTo: $content
          });
        }
        if (feedback.wrong) {
          $('<span>', {
            'class': 'h5p-question-explanation-wrong',
            html: feedback.wrong,
            appendTo: $content
          });
        }
        $content.appendTo($explanationItem);

        if (feedback.text) {
          $('<div>', {
            'class': 'h5p-question-explanation-text',
            html: feedback.text,
            appendTo: $explanationItem
          });
        }
      }
    };

    createHTML();

    /**
     * Return the container HTMLElement
     *
     * @return {HTMLElement}
     */
    self.getElement = function () {
      return self.$explanation;
    };
  }

  return Explainer;

})(H5P.jQuery);
;
(function (Question) {

  /**
   * Makes it easy to add animated score points for your question type.
   *
   * @class H5P.Question.ScorePoints
   */
  Question.ScorePoints = function () {
    var self = this;

    var elements = [];
    var showElementsTimer;

    /**
     * Create the element that displays the score point element for questions.
     *
     * @param {boolean} isCorrect
     * @return {HTMLElement}
     */
    self.getElement = function (isCorrect) {
      var element = document.createElement('div');
      element.classList.add(isCorrect ? 'h5p-question-plus-one' : 'h5p-question-minus-one');
      element.classList.add('h5p-question-hidden-one');
      elements.push(element);

      // Schedule display animation of all added elements
      if (showElementsTimer) {
        clearTimeout(showElementsTimer);
      }
      showElementsTimer = setTimeout(showElements, 0);

      return element;
    };

    /**
     * @private
     */
    var showElements = function () {
      // Determine delay between triggering animations
      var delay = 0;
      var increment = 150;
      var maxTime = 1000;

      if (elements.length && elements.length > Math.ceil(maxTime / increment)) {
        // Animations will run for more than ~1 second, reduce it.
        increment = maxTime / elements.length;
      }

      for (var i = 0; i < elements.length; i++) {
        // Use timer to trigger show
        setTimeout(showElement(elements[i]), delay);

        // Increse delay for next element
        delay += increment;
      }
    };

    /**
     * Trigger transition animation for the given element
     *
     * @private
     * @param {HTMLElement} element
     * @return {function}
     */
    var showElement = function (element) {
      return function () {
        element.classList.remove('h5p-question-hidden-one');
      };
    };
  };

})(H5P.Question);
;
var H5P = H5P || {};
H5P.SingleChoiceSet = H5P.SingleChoiceSet || {};

H5P.SingleChoiceSet.StopWatch = (function () {
  /**
   * @class {H5P.SingleChoiceSet.StopWatch}
   * @constructor
   */
  function StopWatch() {
    /**
     * @property {number} duration in ms
     */
    this.duration = 0;
  }

  /**
   * Starts the stop watch
   *
   * @public
   * @return {H5P.SingleChoiceSet.StopWatch}
   */
  StopWatch.prototype.start = function () {
    /**
     * @property {number}
     */
    this.startTime = Date.now();
    return this;
  };

  /**
   * Stops the stopwatch, and returns the duration in seconds.
   *
   * @public
   * @return {number}
   */
  StopWatch.prototype.stop = function () {
    this.duration = this.duration + Date.now() - this.startTime;
    return this.passedTime();
  };

  /**
   * Sets the duration to 0
   *
   * @public
   */
  StopWatch.prototype.reset = function () {
    this.duration = 0;
  };

  /**
   * Returns the passed time in seconds
   *
   * @public
   * @return {number}
   */
  StopWatch.prototype.passedTime = function () {
    return Math.round(this.duration / 10) / 100;
  };

  return StopWatch;
})();
;
H5P.SingleChoiceSet = H5P.SingleChoiceSet || {};

H5P.SingleChoiceSet.SoundEffects = (function () {
  let isDefined = false;

  const SoundEffects = {
    types: [
      'positive-short',
      'negative-short'
    ]
  };

  const players = {};

  /**
   * Setup defined sounds
   *
   * @param {string} libraryPath
   * @return {boolean} True if setup was successfull, otherwise false
   */
  SoundEffects.setup = function (libraryPath) {
    if (isDefined) {
      return false;
    }
    isDefined = true;

    SoundEffects.types.forEach(async function (type) {
      const player = new Audio();
      const extension = player.canPlayType('audio/ogg') ? 'ogg' : 'mp3';
      const response = await fetch(libraryPath + 'sounds/' + type + '.' + extension);
      const data = await response.blob();
      player.src = URL.createObjectURL(data);
      players[type] = player;
    });

    return true;
  };

  /**
   * Play a sound
   *
   * @param  {string} type  Name of the sound as defined in [SoundEffects.types]{@link H5P.SoundEffects.SoundEffects#types}
   * @param  {number} delay Delay in milliseconds
   */
  SoundEffects.play = function (type, delay) {
    if (!players[type]) {
      return;
    }

    setTimeout(function () {
      players[type].play();
    }, delay || 0);
  };

  return SoundEffects;
})();
;
var H5P = H5P || {};
H5P.SingleChoiceSet = H5P.SingleChoiceSet || {};

H5P.SingleChoiceSet.XApiEventBuilder = (function ($, EventDispatcher) {
  /**
   * @typedef {object} LocalizedString
   * @property {string} en-US
   */

  /**
   * @class {H5P.SingleChoiceSet.XApiEventDefinitionBuilder}
   * @constructor
   */
  function XApiEventDefinitionBuilder() {
    EventDispatcher.call(this);
    /**
     * @property {object} attributes
     * @property {string} attributes.name
     * @property {string} attributes.description
     * @property {string} attributes.interactionType
     * @property {string} attributes.correctResponsesPattern
     * @property {object} attributes.optional
     */
    this.attributes = {};
  }

  XApiEventDefinitionBuilder.prototype = Object.create(EventDispatcher.prototype);
  XApiEventDefinitionBuilder.prototype.constructor = XApiEventDefinitionBuilder;


  /**
   * Sets name
   * @param {string} name
   * @return {XApiEventDefinitionBuilder}
   */
  XApiEventDefinitionBuilder.prototype.name = function (name) {
    this.attributes.name = name;
    return this;
  };

  /**
   * Question text and any additional information to generate the report.
   * @param {string} description
   * @return {XApiEventDefinitionBuilder}
   */
  XApiEventDefinitionBuilder.prototype.description = function (description) {
    this.attributes.description = description;
    return this;
  };

  /**
   * Type of the interaction.
   * @param {string} interactionType
   * @see {@link https://github.com/adlnet/xAPI-Spec/blob/master/xAPI-Data.md#interaction-types|xAPI Spec}
   * @return {XApiEventDefinitionBuilder}
   */
  XApiEventDefinitionBuilder.prototype.interactionType = function (interactionType) {
    this.attributes.interactionType = interactionType;
    return this;
  };

  /**
   * A pattern for determining the correct answers of the interaction
   * @param {string[]} correctResponsesPattern
   * @see {@link https://github.com/adlnet/xAPI-Spec/blob/master/xAPI-Data.md#response-patterns|xAPI Spec}
   * @return {XApiEventDefinitionBuilder}
   */
  XApiEventDefinitionBuilder.prototype.correctResponsesPattern = function (correctResponsesPattern) {
    this.attributes.correctResponsesPattern = correctResponsesPattern;
    return this;
  };

  /**
   * Sets optional attributes
   * @param {object} optional Can have one of the following configuration objects: choices, scale, source, target, steps
   * @return {XApiEventDefinitionBuilder}
   */
  XApiEventDefinitionBuilder.prototype.optional = function (optional) {
    this.attributes.optional = optional;
    return this;
  };

  /**
   * @return {object}
   */
  XApiEventDefinitionBuilder.prototype.build = function () {
    var definition = {};

    // sets attributes
    setAttribute(definition, 'name', localizeToEnUS(this.attributes.name));
    setAttribute(definition, 'description', localizeToEnUS(this.attributes.description));
    setAttribute(definition, 'interactionType', this.attributes.interactionType);
    setAttribute(definition, 'correctResponsesPattern', this.attributes.correctResponsesPattern);
    setAttribute(definition, 'type', 'http://adlnet.gov/expapi/activities/cmi.interaction');

    // adds the optional object to the definition
    if (this.attributes.optional) {
      $.extend(definition, this.attributes.optional);
    }

    return definition;
  };

  // -----------------------------------------------------

  /**
   *
   * @constructor
   */
  function XApiEventResultBuilder() {
    EventDispatcher.call(this);
    /**
     * @property {object} attributes
     * @property {string} attributes.completion
     * @property {boolean} attributes.success
     * @property {boolean} attributes.response
     * @property {number} attributes.rawScore
     * @property {number} attributes.maxScore
     */
    this.attributes = {};
  }

  XApiEventResultBuilder.prototype = Object.create(EventDispatcher.prototype);
  XApiEventResultBuilder.prototype.constructor = XApiEventResultBuilder;

  /**
   * @param {boolean} completion
   * @return {XApiEventResultBuilder}
   */
  XApiEventResultBuilder.prototype.completion = function (completion) {
    this.attributes.completion = completion;
    return this;
  };

  /**
   * @param {boolean} success
   * @return {XApiEventResultBuilder}
   */
  XApiEventResultBuilder.prototype.success = function (success) {
    this.attributes.success = success;
    return this;
  };

  /**
   * @param {number} duration The duraction in seconds
   * @return {XApiEventResultBuilder}
   */
  XApiEventResultBuilder.prototype.duration = function (duration) {
    this.attributes.duration = duration;
    return this;
  };

  /**
   * Sets response
   * @param {string|string[]} response
   * @return {XApiEventResultBuilder}
   */
  XApiEventResultBuilder.prototype.response = function (response) {
    this.attributes.response = (typeof response === 'string') ? response : response.join('[,]');
    return this;
  };

  /**
   * Sets the score, and max score
   * @param {number} score
   * @param {number} maxScore
   * @return {XApiEventResultBuilder}
   */
  XApiEventResultBuilder.prototype.score = function (score, maxScore) {
    this.attributes.rawScore = score;
    this.attributes.maxScore = maxScore;
    return this;
  };

  /**
   * Builds the result object
   * @return {object}
   */
  XApiEventResultBuilder.prototype.build = function () {
    var result = {};

    setAttribute(result, 'response', this.attributes.response);
    setAttribute(result, 'completion', this.attributes.completion);
    setAttribute(result, 'success', this.attributes.success);

    if (isDefined(this.attributes.duration)) {
      setAttribute(result, 'duration','PT' +  this.attributes.duration + 'S');
    }

    // sets score
    if (isDefined(this.attributes.rawScore)) {
      result.score = {};
      setAttribute(result.score, 'raw', this.attributes.rawScore);

      if (isDefined(this.attributes.maxScore) && this.attributes.maxScore > 0) {
        setAttribute(result.score, 'min', 0);
        setAttribute(result.score, 'max', this.attributes.maxScore);
        setAttribute(result.score, 'min', 0);
        setAttribute(result.score, 'scaled', Math.round(this.attributes.rawScore / this.attributes.maxScore * 10000) / 10000);
      }
    }

    return result;
  };

  // -----------------------------------------------------

  /**
   * @class {H5P.SingleChoiceSet.XApiEventBuilder}
   */
  function XApiEventBuilder() {
    EventDispatcher.call(this);
    /**
     * @property {object} attributes
     * @property {string} attributes.contentId
     * @property {string} attributes.subContentId
     */
    this.attributes = {};
  }

  XApiEventBuilder.prototype = Object.create(EventDispatcher.prototype);
  XApiEventBuilder.prototype.constructor = XApiEventBuilder;


  /**
   * @param {object} verb
   *
   * @public
   * @return {H5P.SingleChoiceSet.XApiEventBuilder}
   */
  XApiEventBuilder.prototype.verb = function (verb) {
    this.attributes.verb = verb;
    return this;
  };

  /**
   * @param {string} name
   * @param {string} mbox
   * @param {string} objectType
   *
   * @public
   * @return {H5P.SingleChoiceSet.XApiEventBuilder}
   */
  XApiEventBuilder.prototype.actor = function (name, mbox, objectType) {
    this.attributes.actor = {
      name: name,
      mbox: mbox,
      objectType: objectType
    };

    return this;
  };

  /**
   * Sets contentId
   * @param {string} contentId
   * @param {string} [subContentId]
   * @return {H5P.SingleChoiceSet.XApiEventBuilder}
   */
  XApiEventBuilder.prototype.contentId = function (contentId, subContentId) {
    this.attributes.contentId = contentId;
    this.attributes.subContentId = subContentId;
    return this;
  };

  /**
   * Sets parent in context
   *
   * @param {string} parentContentId
   * @param {string} [parentSubContentId]
   * @return {H5P.SingleChoiceSet.XApiEventBuilder}
   */
  XApiEventBuilder.prototype.context = function (parentContentId, parentSubContentId) {
    this.attributes.parentContentId = parentContentId;
    this.attributes.parentSubContentId = parentSubContentId;
    return this;
  };

  /**
   * @param {object} result
   *
   * @public
   * @return {H5P.SingleChoiceSet.XApiEventBuilder}
   */
  XApiEventBuilder.prototype.result = function (result) {
    this.attributes.result = result;
    return this;
  };

  /**
   * @param {object} objectDefinition
   *
   * @public
   * @return {H5P.SingleChoiceSet.XApiEventBuilder}
   */
  XApiEventBuilder.prototype.objectDefinition = function (objectDefinition) {
    this.attributes.objectDefinition = objectDefinition;
    return this;
  };

  /**
   * Returns the buildt event
   * @public
   * @return {H5P.XAPIEvent}
   */
  XApiEventBuilder.prototype.build = function () {
    var event = new H5P.XAPIEvent();

    event.setActor();
    event.setVerb(this.attributes.verb);

    // sets context
    if (this.attributes.parentContentId || this.attributes.parentSubContentId) {
      event.data.statement.context = {
        'contextActivities': {
          'parent': [
            {
              'id': getContentXAPIId(this.attributes.parentContentId, this.attributes.parentSubContentId),
              'objectType': "Activity"
            }
          ]
        }
      };
    }

    event.data.statement.object = {
      'id': getContentXAPIId(this.attributes.contentId, this.attributes.subContentId),
      'objectType': 'Activity'
    };

    setAttribute(event.data, 'actor', this.attributes.actor);
    setAttribute(event.data.statement, 'result', this.attributes.result);
    setAttribute(event.data.statement.object, 'definition', this.attributes.objectDefinition);

    // sets h5p specific attributes
    if (event.data.statement.object.definition && (this.attributes.contentId || this.attributes.subContentId)) {
      var extensions = event.data.statement.object.definition.extensions = {};
      setAttribute(extensions, 'http://h5p.org/x-api/h5p-local-content-id', this.attributes.contentId);
      setAttribute(extensions, 'http://h5p.org/x-api/h5p-subContentId', this.attributes.subContentId);
    }

    return event;
  };

  /**
   * Creates a Localized String object for en-US
   *
   * @param str
   * @return {LocalizedString}
   */
  var localizeToEnUS = function (str) {
    if (str != undefined) {
      return {
        'en-US': cleanString(str)
      };
    }
  };

  /**
   * Generates an id for the content
   * @param {string} contentId
   * @param {string} [subContentId]
   *
   * @see {@link https://github.com/h5p/h5p-php-library/blob/master/js/h5p-x-api-event.js#L240-L249}
   * @return {string}
   */
  var getContentXAPIId = function (contentId, subContentId) {
    const cid = 'cid-' + contentId;
    if (contentId && H5PIntegration && H5PIntegration.contents && H5PIntegration.contents[cid]) {
      var id =  H5PIntegration.contents[cid].url;

      if (subContentId) {
        id += '?subContentId=' +  subContentId;
      }

      return id;
    }
  };

  /**
   * Removes html elements from string
   *
   * @param {string} str
   * @return {string}
   */
  var cleanString = function (str) {
    return $('<div>' + str + '</div>').text().trim();
  };

  var isDefined = function (val) {
    return typeof val !== 'undefined';
  };

  function setAttribute(obj, key, value, required) {
    if (isDefined(value)) {
      obj[key] = value;
    }
    else if (required) {
      console.error("xApiEventBuilder: No value for [" + key + "] in", obj);
    }
  }

  /**
   * Creates a new XApiEventBuilder
   *
   * @public
   * @static
   * @return {H5P.SingleChoiceSet.XApiEventBuilder}
   */
  XApiEventBuilder.create = function () {
    return new XApiEventBuilder();
  };

  /**
   * Creates a new XApiEventDefinitionBuilder
   *
   * @public
   * @static
   * @return {XApiEventDefinitionBuilder}
   */
  XApiEventBuilder.createDefinition = function () {
    return new XApiEventDefinitionBuilder();
  };

  /**
   * Creates a new XApiEventDefinitionBuilder
   *
   * @public
   * @static
   * @return {XApiEventResultBuilder}
   */
  XApiEventBuilder.createResult = function () {
    return new XApiEventResultBuilder();
  };

  /**
   * Returns choice to be used with 'cmi.interaction' for Activity of type 'choice'
   *
   * @param {string} id
   * @param {string} description
   *
   * @public
   * @static
   * @see {@link https://github.com/adlnet/xAPI-Spec/blob/master/xAPI-Data.md#choice|xAPI-Spec}
   * @return {object}
   */
  XApiEventBuilder.createChoice = function (id, description) {
    return {
      id: id,
      description: localizeToEnUS(description)
    };
  };

  /**
   * Takes an array of correct ids, and joins them to a 'correct response pattern'
   *
   * @param {string[]} ids
   *
   * @public
   * @static
   * @see {@link https://github.com/adlnet/xAPI-Spec/blob/master/xAPI-Data.md#choice|xAPI-Spec}
   * @return {string}
   */
  XApiEventBuilder.createCorrectResponsePattern = function (ids) {
    return ids.join('[,]');
  };

  /**
   * Interaction types
   *
   * @readonly
   * @enum {String}
   */
  XApiEventBuilder.interactionTypes = {
    CHOICE: 'choice',
    COMPOUND: 'compound',
    FILL_IN: 'fill-in',
    MATCHING: 'matching',
    TRUE_FALSE: 'true-false'
  };

  /**
   * Verbs
   *
   * @readonly
   * @enum {String}
   */
  XApiEventBuilder.verbs = {
    ANSWERED: 'answered'
  };

  return XApiEventBuilder;
})(H5P.jQuery, H5P.EventDispatcher);
;
var H5P = H5P || {};
H5P.SingleChoiceSet = H5P.SingleChoiceSet || {};
/**
 * SingleChoiceResultSlide - Represents the result slide
 */
H5P.SingleChoiceSet.ResultSlide = (function ($, EventDispatcher) {

  /**
   * @constructor
   * @param {number} maxscore Max score
   */
  function ResultSlide(maxscore) {
    EventDispatcher.call(this);

    this.$feedbackContainer = $('<div>', {
      'class': 'h5p-sc-feedback-container',
      'tabindex': '-1'
    });

    this.$buttonContainer = $('<div/>', {
      'class': 'h5p-sc-button-container'
    });

    var $resultContainer = $('<div/>', {
      'class': 'h5p-sc-result-container'
    }).append(this.$feedbackContainer)
      .append(this.$buttonContainer);

    this.$resultSlide = $('<div>', {
      'class': 'h5p-sc-slide h5p-sc-set-results',
      'css': {left: (maxscore * 100) + '%'}
    }).append($resultContainer);
  }

  // inherits from EventDispatchers prototype
  ResultSlide.prototype = Object.create(EventDispatcher.prototype);

  // set the constructor
  ResultSlide.prototype.constructor = ResultSlide;

  /**
   * Focus feedback container.
   */
  ResultSlide.prototype.focusScore = function () {
    this.$feedbackContainer.focus();
  };

  /**
   * Append the resultslide to a container
   *
   * @param  {jQuery} $container The container
   * @return {jQuery}            This dom element
   */
  ResultSlide.prototype.appendTo = function ($container) {
    this.$resultSlide.appendTo($container);
    return this.$resultSlide;
  };

  return ResultSlide;
})(H5P.jQuery, H5P.EventDispatcher);
;
var H5P = H5P || {};
H5P.SingleChoiceSet = H5P.SingleChoiceSet || {};

H5P.SingleChoiceSet.SolutionView = (function ($, EventDispatcher) {
  /**
   * Constructor function.
   */
  function SolutionView(id, choices, l10n) {
    EventDispatcher.call(this);
    var self = this;
    self.id = id;
    this.choices = choices;
    self.l10n = l10n;

    this.$solutionView = $('<div>', {
      'class': 'h5p-sc-solution-view'
    });

    // Add header
    this.$header = $('<div>', {
      'class': 'h5p-sc-solution-view-header'
    }).appendTo(this.$solutionView);

    this.$title = $('<div>', {
      'class': 'h5p-sc-solution-view-title',
      'html': l10n.solutionViewTitle,
      'tabindex': '-1'
    });
    this.$title = this.addAriaPunctuation(this.$title);
    this.$header.append(this.$title);

    // Close solution view button
    $('<button>', {
      'role': 'button',
      'aria-label': l10n.closeButtonLabel + '.',
      'class': 'h5p-joubelui-button h5p-sc-close-solution-view',
      'click': function () {
        self.hide();
      }
    }).appendTo(this.$header);

    self.populate();
  }

  /**
   * Will append the solution view to a container DOM
   * @param  {jQuery} $container The DOM object to append to
   */
  SolutionView.prototype.appendTo = function ($container) {
    this.$solutionView.appendTo($container);
  };

  /**
   * Shows the solution view
   */
  SolutionView.prototype.show = function () {
    var self = this;
    self.$solutionView.addClass('visible');
    self.$title.focus();

    $(document).on('keyup.solutionview', function (event) {
      if (event.keyCode === 27) { // Escape
        self.hide();
        $(document).off('keyup.solutionview');
      }
    });
  };

  /**
   * Hides the solution view
   */
  SolutionView.prototype.hide = function () {
    this.$solutionView.removeClass('visible');
    this.trigger('hide', this);
  };


  /**
   * Populates the solution view
   */
  SolutionView.prototype.populate = function () {
    var self = this;
    self.$choices = $('<dl>', {
      'class': 'h5p-sc-solution-choices',
      'tabindex': -1,
    });

    this.choices.forEach(function (choice, index) {
      if (choice.question && choice.answers && choice.answers.length !== 0) {
        var $question = self.addAriaPunctuation($('<dt>', {
          'class': 'h5p-sc-solution-question',
          html: '<span class="h5p-hidden-read">' + self.l10n.solutionListQuestionNumber.replace(':num', index + 1) + '</span>' + choice.question
        }));

        self.$choices.append($question);

        var $answer = self.addAriaPunctuation($('<dd>', {
          'class': 'h5p-sc-solution-answer',
          html: choice.answers[0]
        }));

        self.$choices.append($answer);
      }
    });
    self.$choices.appendTo(this.$solutionView);
  };

  /**
   * If a jQuery elements text is missing punctuation, add an aria-label to the element
   * containing the text, and adding an extra "period"-symbol at the end.
   *
   * @param {jQuery} $element A jQuery-element
   * @returns {jQuery} The mutated jQuery-element
   */
  SolutionView.prototype.addAriaPunctuation = function ($element) {
    var text = $element.text().trim();

    if (!this.hasPunctuation(text)) {
      $element.attr('aria-label', text + '.');
    }

    return $element;
  };

  /**
   * Checks if a string ends with punctuation
   *
   * @private
   * @param {String} text Input string
   */
  SolutionView.prototype.hasPunctuation = function (text) {
    return /[,.?!]$/.test(text);
  };

  return SolutionView;
})(H5P.jQuery, H5P.EventDispatcher);
;
var H5P = H5P || {};
H5P.SingleChoiceSet = H5P.SingleChoiceSet || {};

H5P.SingleChoiceSet.Alternative = (function ($, EventDispatcher) {

  /**
   * @constructor
   *
   * @param {object} options Options for the alternative
   */
  function Alternative(options) {
    EventDispatcher.call(this);
    var self = this;

    this.options = options;

    var triggerAlternativeSelected = function (event) {
      self.trigger('alternative-selected', {
        correct: self.options.correct,
        $element: self.$alternative,
        answerIndex: self.options.answerIndex
      });

      event.preventDefault();
    };

    this.$alternative = $('<li>', {
      'class': 'h5p-sc-alternative h5p-sc-is-' + (this.options.correct ? 'correct' : 'wrong'),
      'role': 'radio',
      'tabindex': -1,
      'on': {
        'keydown': function (event) {
          switch (event.which) {
            case 13: // Enter
            case 32: // Space
              // Answer question
              triggerAlternativeSelected(event);
              break;

            case 35: // End radio button
              // Go to previous Option
              self.trigger('lastOption', event);
              event.preventDefault();
              break;

            case 36: // Home radio button
              // Go to previous Option
              self.trigger('firstOption', event);
              event.preventDefault();
              break;

            case 37: // Left Arrow
            case 38: // Up Arrow
              // Go to previous Option
              self.trigger('previousOption', event);
              event.preventDefault();
              break;

            case 39: // Right Arrow
            case 40: // Down Arrow
              // Go to next Option
              self.trigger('nextOption', event);
              event.preventDefault();
              break;
          }
        }
      },
      'focus': function (event) {
        self.trigger('focus', event);
      },
      'click': triggerAlternativeSelected
    });

    this.$alternative.append($('<div>', {
      'class': 'h5p-sc-progressbar'
    }));

    this.$alternative.append($('<div>', {
      'class': 'h5p-sc-label',
      'html': this.options.text
    }));

    this.$alternative.append($('<div>', {
      'class': 'h5p-sc-status'
    }));
    this.$alternative.append($('<div>', {
      'class': 'h5p-sc-a11y',
      'aria-hidden': 'true'
    }));
  }

  Alternative.prototype = Object.create(EventDispatcher.prototype);
  Alternative.prototype.constructor = Alternative;

  /**
   * Is this alternative the correct one?
   *
   * @return {boolean}  Correct or not?
   */
  Alternative.prototype.isCorrect = function () {
    return this.options.correct;
  };

  /**
   * Move focus to this option.
   */
  Alternative.prototype.focus = function () {
    this.$alternative.focus();
  };

  /**
   * Makes it possible to tab your way to this option.
   */
  Alternative.prototype.tabbable = function () {
    this.$alternative.attr('tabindex', 0);
  };

  /**
   * Make sure it's NOT possible to tab your way to this option.
   */
  Alternative.prototype.notTabbable = function () {
    this.$alternative.attr('tabindex', -1);
  };

  /**
   * Append the alternative to a DOM container
   *
   * @param  {jQuery} $container The Dom element to append to
   * @return {jQuery}            This dom element
   */
  Alternative.prototype.appendTo = function ($container) {
    $container.append(this.$alternative);
    return this.$alternative;
  };

  return Alternative;

})(H5P.jQuery, H5P.EventDispatcher);
;
var H5P = H5P || {};
H5P.SingleChoiceSet = H5P.SingleChoiceSet || {};

H5P.SingleChoiceSet.SingleChoice = (function ($, EventDispatcher, Alternative) {
  /**
   * Constructor function.
   */
  function SingleChoice(options, index, id, isAutoConfinue) {
    EventDispatcher.call(this);
    // Extend defaults with provided options
    this.options = $.extend(true, {}, {
      question: '',
      answers: []
    }, options);
    this.isAutoConfinue = isAutoConfinue;
    // Keep provided id.
    this.index = index;
    this.id = id;
    this.answered = false;

    for (var i = 0; i < this.options.answers.length; i++) {
      this.options.answers[i] = {
        text: this.options.answers[i],
        correct: i === 0,
        answerIndex: i
      };
    }
    // Randomize alternatives
    this.options.answers = H5P.shuffleArray(this.options.answers);
  }

  SingleChoice.prototype = Object.create(EventDispatcher.prototype);
  SingleChoice.prototype.constructor = SingleChoice;

  /**
   * appendTo function invoked to append SingleChoice to container
   *
   * @param {jQuery} $container
   * @param {boolean} isCurrent Current slide we are on
   */
  SingleChoice.prototype.appendTo = function ($container, isCurrent) {
    var self = this;
    this.$container = $container;

    // Index of the currently focused option.
    var focusedOption;

    this.$choice = $('<div>', {
      'class': 'h5p-sc-slide h5p-sc' + (isCurrent ? ' h5p-sc-current-slide' : ''),
      css: {'left': (self.index * 100) + '%'}
    });

    var questionId = 'single-choice-' + self.id + '-question-' + self.index;

    this.$choice.append($('<div>', {
      'id': questionId,
      'class': 'h5p-sc-question',
      'html': this.options.question
    }));

    var $alternatives = $('<ul>', {
      'class': 'h5p-sc-alternatives',
      'role': 'radiogroup',
      'aria-labelledby': questionId
    });

    /**
     * List of Alternatives
     *
     * @type {Alternative[]}
     */
    this.alternatives = self.options.answers.map(function (opts) {
      return new Alternative(opts);
    });

    /**
     * Handles click on an alternative
     */
    var handleAlternativeSelected = function (event) {
      var $element = event.data.$element;
      var correct = event.data.correct;
      var answerIndex = event.data.answerIndex;

      if ($element.parent().hasClass('h5p-sc-selected')) {
        return;
      }

      self.trigger('alternative-selected', {
        correct: correct,
        index: self.index,
        answerIndex: answerIndex,
        currentIndex: $element.index()
      });

      H5P.Transition.onTransitionEnd($element.find('.h5p-sc-progressbar'), function () {
        $element.addClass('h5p-sc-drummed');
        self.showResult(correct, answerIndex);
      }, 700);

      $element.addClass('h5p-sc-selected').parent().addClass('h5p-sc-selected');

      // indicate that this question is anwered
      this.setAnswered(true);
    };

    /**
     * Handles focusing one of the options, making the rest non-tabbable.
     * @private
     */
    var handleFocus = function (answer, index) {
      // Keep track of currently focused option
      focusedOption = index;

      // remove tabbable all alternatives
      self.alternatives.forEach(function (alternative) {
        alternative.notTabbable();
      });
      answer.tabbable();
    };

    /**
     * Handles moving the focus from the current option to the previous option.
     * @private
     */
    var handlePreviousOption = function () {
      if (focusedOption === 0) {
        // wrap around to last
        this.focusOnAlternative(self.alternatives.length - 1);
      }
      else {
        this.focusOnAlternative(focusedOption - 1);
      }
    };

    /**
     * Handles moving the focus from the current option to the next option.
     * @private
     */
    var handleNextOption = function () {
      if ((focusedOption === this.alternatives.length - 1)) {
        // wrap around to first
        this.focusOnAlternative(0);
      }
      else {
        this.focusOnAlternative(focusedOption + 1);
      }
    };

    /**
     * Handles moving the focus to the first option
     * @private
     */
    var handleFirstOption = function () {
      this.focusOnAlternative(0);
    };

    /**
     * Handles moving the focus to the last option
     * @private
     */
    var handleLastOption = function () {
      this.focusOnAlternative(self.alternatives.length - 1);
    };

    for (var i = 0; i < this.alternatives.length; i++) {
      var alternative = this.alternatives[i];

      if (i === 0) {
        alternative.tabbable();
      }

      alternative.appendTo($alternatives);
      alternative.on('focus', handleFocus.bind(this, alternative, i), this);
      alternative.on('alternative-selected', handleAlternativeSelected, this);
      alternative.on('previousOption', handlePreviousOption, this);
      alternative.on('nextOption', handleNextOption, this);
      alternative.on('firstOption', handleFirstOption, this);
      alternative.on('lastOption', handleLastOption, this);

    }

    this.$choice.append($alternatives);
    $container.append(this.$choice);
    return this.$choice;
  };

  /**
   * Focus on an alternative by index
   *
   * @param {Number} index The index of the alternative to focus on
   */
  SingleChoice.prototype.focusOnAlternative = function (index) {
    if (!this.answered || !this.isAutoConfinue) {
      this.alternatives[index].focus();
    }
  };

  /**
   * Sets if the question was answered
   *
   * @param {Boolean} answered If this question was answered
   */
  SingleChoice.prototype.setAnswered = function (answered) {
    this.answered = answered;
  };

  /**
   * Reveals the result for a question
   *
   * @param  {boolean} correct True uf answer was correct, otherwise false
   * @param  {number} answerIndex Original index of answer
   */
  SingleChoice.prototype.showResult = function (correct, answerIndex) {
    var self = this;

    var $correctAlternative = self.$choice.find('.h5p-sc-is-correct');

    H5P.Transition.onTransitionEnd($correctAlternative, function () {
      self.trigger('finished', {
        correct: correct,
        index: self.index,
        answerIndex: answerIndex
      });
      self.setAriaAttributes();
    }, 600);

    // Reveal corrects and wrong
    self.$choice.find('.h5p-sc-is-wrong').addClass('h5p-sc-reveal-wrong');
    $correctAlternative.addClass('h5p-sc-reveal-correct');
  };

  /**
   * Reset a11y text for selected options
   */
  SingleChoice.prototype.resetA11yText = function () {
    var self = this;
    self.$choice.find('.h5p-sc-a11y').text('');
  };

  /**
   * Make a11y text readable for screen reader
   */
  SingleChoice.prototype.setA11yTextReadable = function () {
    var self = this;
    self.$choice.find('.h5p-sc-a11y').attr('aria-hidden', false);
  };

  /**
   * Set aria attributes for choice
   */
  SingleChoice.prototype.setAriaAttributes = function () {
    var self = this;
    // A11y mode is enabled
    if (!self.isAutoConfinue) {
      self.$choice.find('.h5p-sc-alternative.h5p-sc-selected').attr('aria-checked', true);
      self.$choice.find('.h5p-sc-alternative').attr('aria-disabled', true);
    }
  }

  /**
   * Reset aria attributes
   */
  SingleChoice.prototype.resetAriaAttributes = function () {
    var self = this;
    // A11y mode is enabled
    if (!self.isAutoConfinue) {
      const alternative = self.$choice.find('.h5p-sc-alternative');
      alternative.removeAttr('aria-disabled');
      alternative.removeAttr('aria-checked');
    }
  };

  return SingleChoice;

})(H5P.jQuery, H5P.EventDispatcher, H5P.SingleChoiceSet.Alternative);
;
var H5P = H5P || {};

H5P.SingleChoiceSet = (function ($, UI, Question, SingleChoice, SolutionView, ResultSlide, SoundEffects, XApiEventBuilder, StopWatch) {
  /**
   * @constructor
   * @extends Question
   * @param {object} options Options for single choice set
   * @param {string} contentId H5P instance id
   * @param {Object} contentData H5P instance data
   */
  function SingleChoiceSet(options, contentId, contentData) {
    var self = this;

    // Extend defaults with provided options
    this.contentId = contentId;
    this.contentData = contentData;
    /**
     * The users input on the questions. Uses the same index as this.options.choices
     * @type {number[]}
     */
    this.userResponses = [];
    Question.call(this, 'single-choice-set');
    this.options = $.extend(true, {}, {
      choices: [],
      overallFeedback: [],
      behaviour: {
        autoContinue: true,
        timeoutCorrect: 2000,
        timeoutWrong: 3000,
        soundEffectsEnabled: true,
        enableRetry: true,
        enableSolutionsButton: true,
        passPercentage: 100
      }
    }, options);
    if (contentData && contentData.previousState !== undefined) {
      this.currentIndex = contentData.previousState.progress;
      this.results = contentData.previousState.answers;
      this.userResponses = contentData.previousState.userResponses !== undefined
        ? contentData.previousState.userResponses
        : [];
    }
    this.currentIndex = this.currentIndex || 0;
    this.results = this.results || {
      corrects: 0,
      wrongs: 0
    };

    if (!this.options.behaviour.autoContinue) {
      this.options.behaviour.timeoutCorrect = 0;
      this.options.behaviour.timeoutWrong = 0;
    }

    /**
     * @property {StopWatch[]} Stop watches for tracking duration of slides
     */
    this.stopWatches = [];
    this.startStopWatch(this.currentIndex);

    this.muted = (this.options.behaviour.soundEffectsEnabled === false);

    this.l10n = H5P.jQuery.extend({
      correctText: 'Correct!',
      incorrectText: 'Incorrect!',
      shouldSelect: "Should have been selected",
      shouldNotSelect: "Should not have been selected",
      nextButtonLabel: 'Next question',
      showSolutionButtonLabel: 'Show solution',
      retryButtonLabel: 'Retry',
      closeButtonLabel: 'Close',
      solutionViewTitle: 'Solution',
      slideOfTotal: 'Slide :num of :total',
      muteButtonLabel: "Mute feedback sound",
      scoreBarLabel: 'You got :num out of :total points',
      solutionListQuestionNumber: 'Question :num',
      a11yShowSolution: 'Show the solution. The task will be marked with its correct solution.',
      a11yRetry: 'Retry the task. Reset all responses and start the task over again.',
    }, options.l10n !== undefined ? options.l10n : {});

    this.$container = $('<div>', {
      'class': 'h5p-sc-set-wrapper navigatable' + (!this.options.behaviour.autoContinue ? ' next-button-mode' : '')
    });

    this.$slides = [];
    // An array containing the SingleChoice instances
    this.choices = [];

    /**
     * Keeps track of buttons that will be hidden
     * @type {Array}
     */
    self.buttonsToBeHidden = [];

    /**
     * The solution dialog
     * @type {SolutionView}
     */
    this.solutionView = new SolutionView(contentId, this.options.choices, this.l10n);

    this.$choices = $('<div>', {
      'class': 'h5p-sc-set h5p-sc-animate'
    });

    // sometimes an empty object is in the choices
    this.options.choices = this.options.choices.filter(function (choice) {
      return choice !== undefined && !!choice.answers;
    });

    var numQuestions = this.options.choices.length;

    // Create progressbar
    self.progressbar = UI.createProgressbar(numQuestions + 1, {
      progressText: this.l10n.slideOfTotal
    });
    self.progressbar.setProgress(this.currentIndex);

    for (var i = 0; i < this.options.choices.length; i++) {
      var choice = new SingleChoice(this.options.choices[i], i, this.contentId, this.options.behaviour.autoContinue);
      choice.on('finished', this.handleQuestionFinished, this);
      choice.on('alternative-selected', this.handleAlternativeSelected, this);
      choice.appendTo(this.$choices, (i === this.currentIndex));
      this.choices.push(choice);
      this.$slides.push(choice.$choice);
    }

    this.resultSlide = new ResultSlide(this.options.choices.length);
    this.resultSlide.appendTo(this.$choices);
    this.resultSlide.on('retry', function() {
      self.resetTask(true);
    }, this);
    this.resultSlide.on('view-solution', this.handleViewSolution, this);
    this.$slides.push(this.resultSlide.$resultSlide);
    this.on('resize', this.resize, this);

    // Use the correct starting slide
    this.recklessJump(this.currentIndex);

    if (this.options.choices.length === this.currentIndex) {
      // Make sure results slide is displayed
      this.resultSlide.$resultSlide.addClass('h5p-sc-current-slide');
      this.setScore(this.results.corrects, true);
    }

    if (!this.muted) {
      setTimeout(function () {
        SoundEffects.setup(self.getLibraryFilePath(''));
      }, 1);
    }

    /**
     * Override Question's hideButton function
     * to be able to hide buttons after delay
     *
     * @override
     * @param {string} id
     */
    this.superHideButton = self.hideButton;
    this.hideButton = (function () {
      return function (id) {

        if (!self.scoreTimeout) {
          return self.superHideButton(id);
        }

        self.buttonsToBeHidden.push(id);
        return this;
      };
    })();
  }

  SingleChoiceSet.prototype = Object.create(Question.prototype);
  SingleChoiceSet.prototype.constructor = SingleChoiceSet;

  /**
   * Set if a element is tabbable or not
   *
   * @param {jQuery} $element The element
   * @param {boolean} tabbable If element should be tabbable
   * @returns {jQuery} The element
   */
  SingleChoiceSet.prototype.setTabbable = function ($element, tabbable) {
    if ($element) {
      $element.attr('tabindex', tabbable ? 0 : -1);
    }
  };

  /**
   * Handle alternative selected, i.e play sound if sound effects are enabled
   *
   * @method handleAlternativeSelected
   * @param  {Object} event Event that was fired
   */
  SingleChoiceSet.prototype.handleAlternativeSelected = function (event) {
    var self = this;
    this.lastAnswerIsCorrect = event.data.correct;

    self.toggleNextButton(true);

    // Keep track of num correct/wrong answers
    this.results[this.lastAnswerIsCorrect ? 'corrects' : 'wrongs']++;

    self.triggerXAPI('interacted');

    // Read and set a11y friendly texts 
    self.readA11yFriendlyText(event.data.index, event.data.currentIndex)

    if (!this.muted) {
      // Can't play it after the transition end is received, since this is not
      // accepted on iPad. Therefore we are playing it here with a delay instead
      SoundEffects.play(this.lastAnswerIsCorrect ? 'positive-short' : 'negative-short', 700);
    }
  };

  /**
   * Handler invoked when question is done
   *
   * @param  {object} event An object containing a single boolean property: "correct".
   */
  SingleChoiceSet.prototype.handleQuestionFinished = function (event) {
    var self = this;

    var index = event.data.index;

    // saves user response
    var userResponse = self.userResponses[index] = event.data.answerIndex;

    // trigger answered event
    var duration = this.stopStopWatch(index);
    var xapiEvent = self.createXApiAnsweredEvent(self.options.choices[index], userResponse, duration);

    self.trigger(xapiEvent);

    self.continue(index);
  };

  /**
   * Setup auto continue
   */
  SingleChoiceSet.prototype.continue = function (index) {
    var self = this;

    self.choices[index].setA11yTextReadable();
    if (!self.options.behaviour.autoContinue) {
      // Set focus to next button
      self.$nextButton.focus();
      return;
    }

    var timeout;
    var letsMove = function () {
      // Handle impatient users
      self.$container.off('click.impatient keydown.impatient');
      clearTimeout(timeout);
      self.next();
    };

    timeout = setTimeout(function () {
      letsMove();
    }, self.lastAnswerIsCorrect ? self.options.behaviour.timeoutCorrect : self.options.behaviour.timeoutWrong);

    self.onImpatientUser(letsMove);
  };

  /**
   * Listen to impatience
   * @param  {Function} action Callback
   */
  SingleChoiceSet.prototype.onImpatientUser = function (action) {
    this.$container.off('click.impatient keydown.impatient');

    this.$container.one('click.impatient', action);
    this.$container.one('keydown.impatient', function (event) {
      // If return, space or right arrow
      if ([13,32,39].indexOf(event.which)) {
        action();
      }
    });
  };

  /**
   * Go to next slide
   */
  SingleChoiceSet.prototype.next = function () {
    this.move(this.currentIndex + 1);
  };

  /**
   * Creates an xAPI answered event
   *
   * @param {object} question
   * @param {number} userAnswer
   * @param {number} duration
   *
   * @return {H5P.XAPIEvent}
   */
  SingleChoiceSet.prototype.createXApiAnsweredEvent = function (question, userAnswer, duration) {
    var self = this;
    var types = XApiEventBuilder.interactionTypes;

    // creates the definition object
    var definition = XApiEventBuilder.createDefinition()
      .interactionType(types.CHOICE)
      .description(question.question)
      .correctResponsesPattern(self.getXApiCorrectResponsePattern())
      .optional( self.getXApiChoices(question.answers))
      .build();

    // create the result object
    var result = XApiEventBuilder.createResult()
      .response(userAnswer.toString())
      .duration(duration)
      .score((userAnswer === 0) ? 1 : 0, 1)
      .completion(true)
      .success(userAnswer === 0)
      .build();

    return XApiEventBuilder.create()
      .verb(XApiEventBuilder.verbs.ANSWERED)
      .objectDefinition(definition)
      .context(self.contentId, self.subContentId)
      .contentId(self.contentId, question.subContentId)
      .result(result)
      .build();
  };

  /**
   * Returns the 'correct response pattern' for xApi
   *
   * @return {string[]}
   */
  SingleChoiceSet.prototype.getXApiCorrectResponsePattern = function () {
    return [XApiEventBuilder.createCorrectResponsePattern([(0).toString()])]; // is always '0' for SCS
  };

  /**
   * Returns the choices array for xApi statements
   *
   * @param {String[]} answers
   *
   * @return {{ choices: []}}
   */
  SingleChoiceSet.prototype.getXApiChoices = function (answers) {
    var choices = answers.map(function (answer, index) {
      return XApiEventBuilder.createChoice(index.toString(), answer);
    });

    return {
      choices: choices
    };
  };

  /**
   * Handles buttons that are queued for hiding
   */
  SingleChoiceSet.prototype.handleQueuedButtonChanges = function () {
    var self = this;

    if (self.buttonsToBeHidden.length) {
      self.buttonsToBeHidden.forEach(function (id) {
        self.superHideButton(id);
      });
    }
    self.buttonsToBeHidden = [];
  };

  /**
   * Set score and feedback
   *
   * @params {Number} score Number of correct answers
   */
  SingleChoiceSet.prototype.setScore = function (score, noXAPI) {
    var self = this;

    if (!self.choices.length) {
      return;
    }

    var feedbackText = determineOverallFeedback(self.options.overallFeedback , score / self.options.choices.length)
      .replace(':numcorrect', score)
      .replace(':maxscore', self.options.choices.length.toString());

    self.setFeedback(feedbackText, score, self.options.choices.length, self.l10n.scoreBarLabel);

    if (score === self.options.choices.length) {
      self.hideButton('try-again');
      self.hideButton('show-solution');
    }
    else {
      self.showButton('try-again');
      self.showButton('show-solution');
    }
    self.handleQueuedButtonChanges();
    self.scoreTimeout = undefined;

    if (!noXAPI) {
      self.triggerXAPIScored(score, self.options.choices.length, 'completed', true, (100 * score / self.options.choices.length) >= self.options.behaviour.passPercentage);
    }

    self.trigger('resize');
  };

  /**
   * Handler invoked when view solution is selected
   */
  SingleChoiceSet.prototype.handleViewSolution = function () {
    var self = this;

    var $tryAgainButton = $('.h5p-question-try-again', self.$container);
    var $showSolutionButton = $('.h5p-question-show-solution', self.$container);
    var buttons = [self.$muteButton, $tryAgainButton, $showSolutionButton];

    // remove tabbable for buttons in result view
    buttons.forEach(function (button) {
      self.setTabbable(button, false);
    });

    self.solutionView.on('hide', function () {
      // re-add tabbable for buttons in result view
      buttons.forEach(function (button) {
        self.setTabbable(button, true);
      });
      self.toggleAriaVisibility(true);
      // Focus on first button when closing solution view
      self.focusButton();
    });

    self.solutionView.show();
    self.toggleAriaVisibility(false);
  };

  /**
   * Toggle elements visibility to Assistive Technologies
   *
   * @param {boolean} enable Make elements visible
   */
  SingleChoiceSet.prototype.toggleAriaVisibility = function (enable) {
    var self = this;
    var ariaHidden = enable ? '' : 'true';
    if (self.$muteButton) {
      self.$muteButton.attr('aria-hidden', ariaHidden);
    }
    self.progressbar.$progressbar.attr('aria-hidden', ariaHidden);
    self.$choices.attr('aria-hidden', ariaHidden);
  };

  /**
   * Register DOM elements before they are attached.
   * Called from H5P.Question.
   */
  SingleChoiceSet.prototype.registerDomElements = function () {
    // Register task content area.
    this.setContent(this.createQuestion());

    // Register buttons with question.
    this.addButtons();

    // Insert feedback and buttons section on the result slide
    this.insertSectionAtElement('feedback', this.resultSlide.$feedbackContainer);
    this.insertSectionAtElement('scorebar', this.resultSlide.$feedbackContainer);
    this.insertSectionAtElement('buttons', this.resultSlide.$buttonContainer);

    // Question is finished
    if (this.options.choices.length === this.currentIndex) {
      this.trigger('question-finished');
    }

    this.trigger('resize');
  };

  /**
   * Add Buttons to question.
   */
  SingleChoiceSet.prototype.addButtons = function () {
    var self = this;

    if (this.options.behaviour.enableRetry) {
      this.addButton('try-again', this.l10n.retryButtonLabel, function () {
        self.resetTask(true);
      }, self.results.corrects !== self.options.choices.length, {
        'aria-label': this.l10n.a11yRetry,
      });
    }

    if (this.options.behaviour.enableSolutionsButton) {
      this.addButton('show-solution', this.l10n.showSolutionButtonLabel, function () {
        self.showSolutions();
      }, self.results.corrects !== self.options.choices.length, {
        'aria-label': this.l10n.a11yShowSolution,
      });
    }
  };

  /**
   * Create main content
   */
  SingleChoiceSet.prototype.createQuestion = function () {
    var self = this;

    self.progressbar.appendTo(self.$container);
    self.$container.append(self.$choices);

    function toggleMute(event) {
      var $button = $(event.target);
      event.preventDefault();
      self.muted = !self.muted;
      $button.attr('aria-pressed', self.muted);
    }

    // Keep this out of H5P.Question, since we are moving the button & feedback
    // region to the last slide
    if (!this.options.behaviour.autoContinue) {

      var handleNextClick = function () {
        if (self.$nextButton.attr('aria-disabled') !== 'true') {
          self.next();
        }
      };

      self.$nextButton = UI.createButton({
        'class': 'h5p-ssc-next-button',
        'aria-label': self.l10n.nextButtonLabel,
        click: handleNextClick,
        keydown: function (event) {
          switch (event.which) {
            case 13: // Enter
            case 32: // Space
              handleNextClick();
              event.preventDefault();
          }
        },
        appendTo: self.$container
      });
      self.toggleNextButton(false);
    }

    if (self.options.behaviour.soundEffectsEnabled) {
      self.$muteButton = $('<div>', {
        'class': 'h5p-sc-sound-control',
        'tabindex': 0,
        'role': 'button',
        'aria-label': self.l10n.muteButtonLabel,
        'aria-pressed': false,
        'on': {
          'keydown': function (event) {
            switch (event.which) {
              case 13: // Enter
              case 32: // Space
                toggleMute(event);
                break;
            }
          }
        },
        'click': toggleMute,
        prependTo: self.$container
      });
    }

    // Append solution view - hidden by default:
    self.solutionView.appendTo(self.$container);

    self.resize();

    // Hide all other slides than the current one:
    self.$container.addClass('initialized');

    return self.$container;
  };

  /**
   * Resize if something outside resizes
   */
  SingleChoiceSet.prototype.resize = function () {
    var self = this;
    var maxHeight = 0;
    self.choices.forEach(function (choice) {
      var choiceHeight = choice.$choice.outerHeight();
      maxHeight = choiceHeight > maxHeight ? choiceHeight : maxHeight;
    });

    // Set minimum height for choices
    self.$choices.css({minHeight: maxHeight + 'px'});
  };

  /**
   * Disable/enable the next button
   * @param  {boolean} enable
   */
  SingleChoiceSet.prototype.toggleNextButton = function (enable) {
    if (this.$nextButton) {
      this.$nextButton.attr('aria-disabled', !enable);
    }
  };

  /**
   * Will jump to the given slide without any though to animations,
   * current slide etc.
   *
   * @public
   */
  SingleChoiceSet.prototype.recklessJump = function (index) {
    var tX = 'translateX(' + (-index * 100) + '%)';
    this.$choices.css({
      '-webkit-transform': tX,
      '-moz-transform': tX,
      '-ms-transform': tX,
      'transform': tX
    });
    this.progressbar.setProgress(index + 1);
  };

  /**
   * Move to slide n
   * @param  {number} index The slide number    to move to
   * @param {boolean} moveFocus True to set focus on first alternative
   */
  SingleChoiceSet.prototype.move = function (index, moveFocus = true) {
    var self = this;
    if (index === this.currentIndex || index > self.$slides.length-1) {
      return;
    }

    var $previousSlide = self.$slides[self.currentIndex];
    var $currentChoice = self.choices[index];
    var $currentSlide = self.$slides[index];
    var isResultSlide = (index >= self.choices.length);

    self.toggleNextButton(false);

    H5P.Transition.onTransitionEnd(self.$choices, function () {
      $previousSlide.removeClass('h5p-sc-current-slide');

      // on slides with answers focus on first alternative
      // if content is root and not on result slide - always move focus
      if (!isResultSlide && (moveFocus || self.isRoot())) {
        $currentChoice.focusOnAlternative(0);
      }
      // on last slide, focus on try again button
      else {
        self.resultSlide.focusScore();
      }
    }, 600);

    // if should show result slide
    if (isResultSlide) {
      self.setScore(self.results.corrects);
    }

    self.$container.toggleClass('navigatable', !isResultSlide);

    // start timing of new slide
    this.startStopWatch(index);

    // move to slide
    $currentSlide.addClass('h5p-sc-current-slide');
    self.recklessJump(index);

    self.currentIndex = index;
  };

  /**
   * Starts a stopwatch for indexed slide
   *
   * @param {number} index
   */
  SingleChoiceSet.prototype.startStopWatch = function (index) {
    this.stopWatches[index] = this.stopWatches[index] || new StopWatch();
    this.stopWatches[index].start();
  };

  /**
   * Stops a stopwatch for indexed slide
   *
   * @param {number} index
   */
  SingleChoiceSet.prototype.stopStopWatch = function (index) {
    if (this.stopWatches[index]) {
      this.stopWatches[index].stop();
    }
  };

  /**
   * Returns the passed time in seconds of a stopwatch on an indexed slide,
   * or 0 if not existing
   *
   * @param {number} index
   * @return {number}
   */
  SingleChoiceSet.prototype.timePassedInStopWatch = function (index) {
    if (this.stopWatches[index] !== undefined) {
      return this.stopWatches[index].passedTime();
    }
    else {
      // if not created, return no passed time,
      return 0;
    }
  };

  /**
   * Returns the time the user has spent on all questions so far
   *
   * @return {number}
   */
  SingleChoiceSet.prototype.getTotalPassedTime = function () {
    return this.stopWatches
      .filter(function (watch) {
        return watch != undefined;
      })
      .reduce(function (sum, watch) {
        return sum + watch.passedTime();
      }, 0);
  };

  /**
   * The following functions implements the CP and IV - Contracts v 1.0 documented here:
   * http://h5p.org/node/1009
   */
  SingleChoiceSet.prototype.getScore = function () {
    return this.results.corrects;
  };

  SingleChoiceSet.prototype.getMaxScore = function () {
    return this.options.choices.length;
  };

  SingleChoiceSet.prototype.getAnswerGiven = function () {
    return (this.results.corrects + this.results.wrongs) > 0;
  };

  SingleChoiceSet.prototype.getTitle = function () {
    return H5P.createTitle((this.contentData && this.contentData.metadata && this.contentData.metadata.title) ? this.contentData.metadata.title : 'Single Choice Set');
  };

  /**
   * Retrieves the xAPI data necessary for generating result reports.
   *
   * @return {object}
   */
  SingleChoiceSet.prototype.getXAPIData = function () {
    var self = this;

    // create array with userAnswer
    var children =  self.options.choices.map(function (question, index) {
      var userResponse = self.userResponses[index] >= 0 ? self.userResponses[index] : '';
      var duration = self.timePassedInStopWatch(index);
      var event = self.createXApiAnsweredEvent(question, userResponse, duration);

      return {
        statement: event.data.statement
      };
    });

    var result = XApiEventBuilder.createResult()
      .score(self.getScore(), self.getMaxScore())
      .duration(self.getTotalPassedTime())
      .build();

    // creates the definition object
    var definition = XApiEventBuilder.createDefinition()
      .interactionType(XApiEventBuilder.interactionTypes.COMPOUND)
      .build();

    var xAPIEvent = XApiEventBuilder.create()
      .verb(XApiEventBuilder.verbs.ANSWERED)
      .contentId(self.contentId, self.subContentId)
      .context(self.getParentAttribute('contentId'), self.getParentAttribute('subContentId'))
      .objectDefinition(definition)
      .result(result)
      .build();

    return {
      statement: xAPIEvent.data.statement,
      children: children
    };
  };

  /**
   * Returns an attribute from this.parent if it exists
   *
   * @param {string} attributeName
   * @return {*|undefined}
   */
  SingleChoiceSet.prototype.getParentAttribute = function (attributeName) {
    var self = this;

    if (self.parent !== undefined) {
      return self.parent[attributeName];
    }
  };

  SingleChoiceSet.prototype.showSolutions = function () {
    this.handleViewSolution();
  };

  /**
   * Reset all answers. This is equal to refreshing the quiz
   * @param {boolean} moveFocus True to move the focus
   * This prevents loss of focus if reset from within content
   */
  SingleChoiceSet.prototype.resetTask = function (moveFocus = false) {
    var self = this;

    // Close solution view if visible:
    this.solutionView.hide();

    // Reset the user's answers
    var classes = ['h5p-sc-reveal-wrong', 'h5p-sc-reveal-correct', 'h5p-sc-selected', 'h5p-sc-drummed', 'h5p-sc-correct-answer'];
    for (var i = 0; i < classes.length; i++) {
      this.$choices.find('.' + classes[i]).removeClass(classes[i]);
    }
    this.results = {
      corrects: 0,
      wrongs: 0
    };

    this.choices.forEach(function (choice) {
      choice.setAnswered(false);
      choice.resetA11yText();
      choice.resetAriaAttributes();
    });

    this.stopWatches.forEach(function (stopWatch) {
      if (stopWatch) {
        stopWatch.reset();
      }
    });

    this.move(0, moveFocus);

    // Reset userResponses as well
    this.userResponses = [];

    // Wait for transition, then remove feedback.
    H5P.Transition.onTransitionEnd(this.$choices, function () {
      self.removeFeedback();
    }, 600);
  };

  /**
   * Clever comment.
   *
   * @public
   * @returns {object}
   */
  SingleChoiceSet.prototype.getCurrentState = function () {
    return this.userResponses.length > 0
      ? {
        progress: this.currentIndex,
        answers: this.results,
        userResponses: this.userResponses
      }
      : undefined;
  };

  /**
   * Generate A11y friendly text
   * 
   * @param  {number} index
   * @param  {number} currentIndex 
   */
  SingleChoiceSet.prototype.readA11yFriendlyText = function (index, currentIndex) {
    var self = this;
    var correctAnswer = self.$choices.find('.h5p-sc-is-correct')[index].textContent.replace(/[\n\r]+|[\s]{2,}/g, ' ').trim();
    let selectedOptionText = this.lastAnswerIsCorrect ? self.l10n.correctText : self.l10n.incorrectText;
    // Announce by ARIA label
    if (!self.options.behaviour.autoContinue) {
      // Set text for a11y
      selectedOptionText = this.lastAnswerIsCorrect ? self.l10n.correctText + self.l10n.shouldSelect : self.l10n.incorrectText + self.l10n.shouldNotSelect;
      self.$choices.find('.h5p-sc-current-slide .h5p-sc-is-correct .h5p-sc-a11y').text(self.l10n.shouldSelect);
      self.$choices.find('.h5p-sc-current-slide .h5p-sc-is-wrong .h5p-sc-a11y').text(self.l10n.shouldNotSelect);
      self.$choices.find('.h5p-sc-current-slide .h5p-sc-alternative').eq(currentIndex).find('.h5p-sc-a11y').text(selectedOptionText);

      // Utilize same variable for the read text
      selectedOptionText = this.lastAnswerIsCorrect ? self.l10n.correctText : self.l10n.incorrectText + correctAnswer + self.l10n.shouldSelect;
    }
    self.read(selectedOptionText);
  };

  /**
   * Determine the overall feedback to display for the question.
   * Returns empty string if no matching range is found.
   *
   * @param {Object[]} feedbacks
   * @param {number} scoreRatio
   * @return {string}
   */
  var determineOverallFeedback = function (feedbacks, scoreRatio) {
    scoreRatio = Math.floor(scoreRatio * 100);

    for (var i = 0; i < feedbacks.length; i++) {
      var feedback = feedbacks[i];
      var hasFeedback = (feedback.feedback !== undefined && feedback.feedback.trim().length !== 0);

      if (feedback.from <= scoreRatio && feedback.to >= scoreRatio && hasFeedback) {
        return feedback.feedback;
      }
    }

    return '';
  };

  return SingleChoiceSet;
})(H5P.jQuery, H5P.JoubelUI, H5P.Question, H5P.SingleChoiceSet.SingleChoice, H5P.SingleChoiceSet.SolutionView, H5P.SingleChoiceSet.ResultSlide, H5P.SingleChoiceSet.SoundEffects, H5P.SingleChoiceSet.XApiEventBuilder, H5P.SingleChoiceSet.StopWatch);
;