'use strict';

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

!function ($) {

  /**
   * Drilldown module.
   * @module foundation.drilldown
   * @requires foundation.util.keyboard
   * @requires foundation.util.motion
   * @requires foundation.util.nest
   */

  var Drilldown = function () {
    /**
     * Creates a new instance of a drilldown menu.
     * @class
     * @param {jQuery} element - jQuery object to make into an accordion menu.
     * @param {Object} options - Overrides to the default plugin settings.
     */
    function Drilldown(element, options) {
      _classCallCheck(this, Drilldown);

      this.$element = element;
      this.options = $.extend({}, Drilldown.defaults, this.$element.data(), options);

      Foundation.Nest.Feather(this.$element, 'drilldown');

      this._init();

      Foundation.registerPlugin(this, 'Drilldown');
      Foundation.Keyboard.register('Drilldown', {
        'ENTER': 'open',
        'SPACE': 'open',
        'ARROW_RIGHT': 'next',
        'ARROW_UP': 'up',
        'ARROW_DOWN': 'down',
        'ARROW_LEFT': 'previous',
        'ESCAPE': 'close',
        'TAB': 'down',
        'SHIFT_TAB': 'up'
      });
    }

    /**
     * Initializes the drilldown by creating jQuery collections of elements
     * @private
     */


    _createClass(Drilldown, [{
      key: '_init',
      value: function _init() {
        this.$submenuAnchors = this.$element.find('li.is-drilldown-submenu-parent').children('a');
        this.$submenus = this.$submenuAnchors.parent('li').children('[data-submenu]');
        this.$menuItems = this.$element.find('li').not('.js-drilldown-back').attr('role', 'menuitem').find('a');
        this.$element.attr('data-mutate', this.$element.attr('data-drilldown') || Foundation.GetYoDigits(6, 'drilldown'));

        this._prepareMenu();
        this._registerEvents();

        this._keyboardEvents();
      }

      /**
       * prepares drilldown menu by setting attributes to links and elements
       * sets a min height to prevent content jumping
       * wraps the element if not already wrapped
       * @private
       * @function
       */

    }, {
      key: '_prepareMenu',
      value: function _prepareMenu() {
        var _this = this;
        // if(!this.options.holdOpen){
        //   this._menuLinkEvents();
        // }
        this.$submenuAnchors.each(function () {
          var $link = $(this);
          var $sub = $link.parent();
          if (_this.options.parentLink) {
            $link.clone().prependTo($sub.children('[data-submenu]')).wrap('<li class="is-submenu-parent-item is-submenu-item is-drilldown-submenu-item" role="menu-item"></li>');
          }
          $link.data('savedHref', $link.attr('href')).removeAttr('href').attr('tabindex', 0);
          $link.children('[data-submenu]').attr({
            'aria-hidden': true,
            'tabindex': 0,
            'role': 'menu'
          });
          _this._events($link);
        });
        this.$submenus.each(function () {
          var $menu = $(this),
              $back = $menu.find('.js-drilldown-back');
          if (!$back.length) {
            switch (_this.options.backButtonPosition) {
              case "bottom":
                $menu.append(_this.options.backButton);
                break;
              case "top":
                $menu.prepend(_this.options.backButton);
                break;
              default:
                console.error("Unsupported backButtonPosition value '" + _this.options.backButtonPosition + "'");
            }
          }
          _this._back($menu);
        });

        this.$submenus.addClass('invisible');
        if (!this.options.autoHeight) {
          this.$submenus.addClass('drilldown-submenu-cover-previous');
        }

        // create a wrapper on element if it doesn't exist.
        if (!this.$element.parent().hasClass('is-drilldown')) {
          this.$wrapper = $(this.options.wrapper).addClass('is-drilldown');
          if (this.options.animateHeight) this.$wrapper.addClass('animate-height');
          this.$element.wrap(this.$wrapper);
        }
        // set wrapper
        this.$wrapper = this.$element.parent();
        this.$wrapper.css(this._getMaxDims());
      }
    }, {
      key: '_resize',
      value: function _resize() {
        this.$wrapper.css({ 'max-width': 'none', 'min-height': 'none' });
        // _getMaxDims has side effects (boo) but calling it should update all other necessary heights & widths
        this.$wrapper.css(this._getMaxDims());
      }

      /**
       * Adds event handlers to elements in the menu.
       * @function
       * @private
       * @param {jQuery} $elem - the current menu item to add handlers to.
       */

    }, {
      key: '_events',
      value: function _events($elem) {
        var _this = this;

        $elem.off('click.zf.drilldown').on('click.zf.drilldown', function (e) {
          if ($(e.target).parentsUntil('ul', 'li').hasClass('is-drilldown-submenu-parent')) {
            e.stopImmediatePropagation();
            e.preventDefault();
          }

          // if(e.target !== e.currentTarget.firstElementChild){
          //   return false;
          // }
          _this._show($elem.parent('li'));

          if (_this.options.closeOnClick) {
            var $body = $('body');
            $body.off('.zf.drilldown').on('click.zf.drilldown', function (e) {
              if (e.target === _this.$element[0] || $.contains(_this.$element[0], e.target)) {
                return;
              }
              e.preventDefault();
              _this._hideAll();
              $body.off('.zf.drilldown');
            });
          }
        });
        this.$element.on('mutateme.zf.trigger', this._resize.bind(this));
      }

      /**
       * Adds event handlers to the menu element.
       * @function
       * @private
       */

    }, {
      key: '_registerEvents',
      value: function _registerEvents() {
        if (this.options.scrollTop) {
          this._bindHandler = this._scrollTop.bind(this);
          this.$element.on('open.zf.drilldown hide.zf.drilldown closed.zf.drilldown', this._bindHandler);
        }
      }

      /**
       * Scroll to Top of Element or data-scroll-top-element
       * @function
       * @fires Drilldown#scrollme
       */

    }, {
      key: '_scrollTop',
      value: function _scrollTop() {
        var _this = this;
        var $scrollTopElement = _this.options.scrollTopElement != '' ? $(_this.options.scrollTopElement) : _this.$element,
            scrollPos = parseInt($scrollTopElement.offset().top + _this.options.scrollTopOffset);
        $('html, body').stop(true).animate({ scrollTop: scrollPos }, _this.options.animationDuration, _this.options.animationEasing, function () {
          /**
            * Fires after the menu has scrolled
            * @event Drilldown#scrollme
            */
          if (this === $('html')[0]) _this.$element.trigger('scrollme.zf.drilldown');
        });
      }

      /**
       * Adds keydown event listener to `li`'s in the menu.
       * @private
       */

    }, {
      key: '_keyboardEvents',
      value: function _keyboardEvents() {
        var _this = this;

        this.$menuItems.add(this.$element.find('.js-drilldown-back > a, .is-submenu-parent-item > a')).on('keydown.zf.drilldown', function (e) {
          var $element = $(this),
              $elements = $element.parent('li').parent('ul').children('li').children('a'),
              $prevElement,
              $nextElement;

          $elements.each(function (i) {
            if ($(this).is($element)) {
              $prevElement = $elements.eq(Math.max(0, i - 1));
              $nextElement = $elements.eq(Math.min(i + 1, $elements.length - 1));
              return;
            }
          });

          Foundation.Keyboard.handleKey(e, 'Drilldown', {
            next: function () {
              if ($element.is(_this.$submenuAnchors)) {
                _this._show($element.parent('li'));
                $element.parent('li').one(Foundation.transitionend($element), function () {
                  $element.parent('li').find('ul li a').filter(_this.$menuItems).first().focus();
                });
                return true;
              }
            },
            previous: function () {
              _this._hide($element.parent('li').parent('ul'));
              $element.parent('li').parent('ul').one(Foundation.transitionend($element), function () {
                setTimeout(function () {
                  $element.parent('li').parent('ul').parent('li').children('a').first().focus();
                }, 1);
              });
              return true;
            },
            up: function () {
              $prevElement.focus();
              // Don't tap focus on first element in root ul
              return !$element.is(_this.$element.find('> li:first-child > a'));
            },
            down: function () {
              $nextElement.focus();
              // Don't tap focus on last element in root ul
              return !$element.is(_this.$element.find('> li:last-child > a'));
            },
            close: function () {
              // Don't close on element in root ul
              if (!$element.is(_this.$element.find('> li > a'))) {
                _this._hide($element.parent().parent());
                $element.parent().parent().siblings('a').focus();
              }
            },
            open: function () {
              if (!$element.is(_this.$menuItems)) {
                // not menu item means back button
                _this._hide($element.parent('li').parent('ul'));
                $element.parent('li').parent('ul').one(Foundation.transitionend($element), function () {
                  setTimeout(function () {
                    $element.parent('li').parent('ul').parent('li').children('a').first().focus();
                  }, 1);
                });
                return true;
              } else if ($element.is(_this.$submenuAnchors)) {
                _this._show($element.parent('li'));
                $element.parent('li').one(Foundation.transitionend($element), function () {
                  $element.parent('li').find('ul li a').filter(_this.$menuItems).first().focus();
                });
                return true;
              }
            },
            handled: function (preventDefault) {
              if (preventDefault) {
                e.preventDefault();
              }
              e.stopImmediatePropagation();
            }
          });
        }); // end keyboardAccess
      }

      /**
       * Closes all open elements, and returns to root menu.
       * @function
       * @fires Drilldown#closed
       */

    }, {
      key: '_hideAll',
      value: function _hideAll() {
        var $elem = this.$element.find('.is-drilldown-submenu.is-active').addClass('is-closing');
        if (this.options.autoHeight) this.$wrapper.css({ height: $elem.parent().closest('ul').data('calcHeight') });
        $elem.one(Foundation.transitionend($elem), function (e) {
          $elem.removeClass('is-active is-closing');
        });
        /**
         * Fires when the menu is fully closed.
         * @event Drilldown#closed
         */
        this.$element.trigger('closed.zf.drilldown');
      }

      /**
       * Adds event listener for each `back` button, and closes open menus.
       * @function
       * @fires Drilldown#back
       * @param {jQuery} $elem - the current sub-menu to add `back` event.
       */

    }, {
      key: '_back',
      value: function _back($elem) {
        var _this = this;
        $elem.off('click.zf.drilldown');
        $elem.children('.js-drilldown-back').on('click.zf.drilldown', function (e) {
          e.stopImmediatePropagation();
          // console.log('mouseup on back');
          _this._hide($elem);

          // If there is a parent submenu, call show
          var parentSubMenu = $elem.parent('li').parent('ul').parent('li');
          if (parentSubMenu.length) {
            _this._show(parentSubMenu);
          }
        });
      }

      /**
       * Adds event listener to menu items w/o submenus to close open menus on click.
       * @function
       * @private
       */

    }, {
      key: '_menuLinkEvents',
      value: function _menuLinkEvents() {
        var _this = this;
        this.$menuItems.not('.is-drilldown-submenu-parent').off('click.zf.drilldown').on('click.zf.drilldown', function (e) {
          // e.stopImmediatePropagation();
          setTimeout(function () {
            _this._hideAll();
          }, 0);
        });
      }

      /**
       * Opens a submenu.
       * @function
       * @fires Drilldown#open
       * @param {jQuery} $elem - the current element with a submenu to open, i.e. the `li` tag.
       */

    }, {
      key: '_show',
      value: function _show($elem) {
        if (this.options.autoHeight) this.$wrapper.css({ height: $elem.children('[data-submenu]').data('calcHeight') });
        $elem.attr('aria-expanded', true);
        $elem.children('[data-submenu]').addClass('is-active').removeClass('invisible').attr('aria-hidden', false);
        /**
         * Fires when the submenu has opened.
         * @event Drilldown#open
         */
        this.$element.trigger('open.zf.drilldown', [$elem]);
      }
    }, {
      key: '_hide',


      /**
       * Hides a submenu
       * @function
       * @fires Drilldown#hide
       * @param {jQuery} $elem - the current sub-menu to hide, i.e. the `ul` tag.
       */
      value: function _hide($elem) {
        if (this.options.autoHeight) this.$wrapper.css({ height: $elem.parent().closest('ul').data('calcHeight') });
        var _this = this;
        $elem.parent('li').attr('aria-expanded', false);
        $elem.attr('aria-hidden', true).addClass('is-closing');
        $elem.addClass('is-closing').one(Foundation.transitionend($elem), function () {
          $elem.removeClass('is-active is-closing');
          $elem.blur().addClass('invisible');
        });
        /**
         * Fires when the submenu has closed.
         * @event Drilldown#hide
         */
        $elem.trigger('hide.zf.drilldown', [$elem]);
      }

      /**
       * Iterates through the nested menus to calculate the min-height, and max-width for the menu.
       * Prevents content jumping.
       * @function
       * @private
       */

    }, {
      key: '_getMaxDims',
      value: function _getMaxDims() {
        var maxHeight = 0,
            result = {},
            _this = this;
        this.$submenus.add(this.$element).each(function () {
          var numOfElems = $(this).children('li').length;
          var height = Foundation.Box.GetDimensions(this).height;
          maxHeight = height > maxHeight ? height : maxHeight;
          if (_this.options.autoHeight) {
            $(this).data('calcHeight', height);
            if (!$(this).hasClass('is-drilldown-submenu')) result['height'] = height;
          }
        });

        if (!this.options.autoHeight) result['min-height'] = maxHeight + 'px';

        result['max-width'] = this.$element[0].getBoundingClientRect().width + 'px';

        return result;
      }

      /**
       * Destroys the Drilldown Menu
       * @function
       */

    }, {
      key: 'destroy',
      value: function destroy() {
        if (this.options.scrollTop) this.$element.off('.zf.drilldown', this._bindHandler);
        this._hideAll();
        this.$element.off('mutateme.zf.trigger');
        Foundation.Nest.Burn(this.$element, 'drilldown');
        this.$element.unwrap().find('.js-drilldown-back, .is-submenu-parent-item').remove().end().find('.is-active, .is-closing, .is-drilldown-submenu').removeClass('is-active is-closing is-drilldown-submenu').end().find('[data-submenu]').removeAttr('aria-hidden tabindex role');
        this.$submenuAnchors.each(function () {
          $(this).off('.zf.drilldown');
        });

        this.$submenus.removeClass('drilldown-submenu-cover-previous');

        this.$element.find('a').each(function () {
          var $link = $(this);
          $link.removeAttr('tabindex');
          if ($link.data('savedHref')) {
            $link.attr('href', $link.data('savedHref')).removeData('savedHref');
          } else {
            return;
          }
        });
        Foundation.unregisterPlugin(this);
      }
    }]);

    return Drilldown;
  }();

  Drilldown.defaults = {
    /**
     * Markup used for JS generated back button. Prepended  or appended (see backButtonPosition) to submenu lists and deleted on `destroy` method, 'js-drilldown-back' class required. Remove the backslash (`\`) if copy and pasting.
     * @option
     * @type {string}
     * @default '<li class="js-drilldown-back"><a tabindex="0">Back</a></li>'
     */
    backButton: '<li class="js-drilldown-back"><a tabindex="0">Back</a></li>',
    /**
     * Position the back button either at the top or bottom of drilldown submenus. Can be `'left'` or `'bottom'`.
     * @option
     * @type {string}
     * @default top
     */
    backButtonPosition: 'top',
    /**
     * Markup used to wrap drilldown menu. Use a class name for independent styling; the JS applied class: `is-drilldown` is required. Remove the backslash (`\`) if copy and pasting.
     * @option
     * @type {string}
     * @default '<div></div>'
     */
    wrapper: '<div></div>',
    /**
     * Adds the parent link to the submenu.
     * @option
     * @type {boolean}
     * @default false
     */
    parentLink: false,
    /**
     * Allow the menu to return to root list on body click.
     * @option
     * @type {boolean}
     * @default false
     */
    closeOnClick: false,
    /**
     * Allow the menu to auto adjust height.
     * @option
     * @type {boolean}
     * @default false
     */
    autoHeight: false,
    /**
     * Animate the auto adjust height.
     * @option
     * @type {boolean}
     * @default false
     */
    animateHeight: false,
    /**
     * Scroll to the top of the menu after opening a submenu or navigating back using the menu back button
     * @option
     * @type {boolean}
     * @default false
     */
    scrollTop: false,
    /**
     * String jquery selector (for example 'body') of element to take offset().top from, if empty string the drilldown menu offset().top is taken
     * @option
     * @type {string}
     * @default ''
     */
    scrollTopElement: '',
    /**
     * ScrollTop offset
     * @option
     * @type {number}
     * @default 0
     */
    scrollTopOffset: 0,
    /**
     * Scroll animation duration
     * @option
     * @type {number}
     * @default 500
     */
    animationDuration: 500,
    /**
     * Scroll animation easing. Can be `'swing'` or `'linear'`.
     * @option
     * @type {string}
     * @see {@link https://api.jquery.com/animate|JQuery animate}
     * @default 'swing'
     */
    animationEasing: 'swing'
    // holdOpen: false
  };

  // Window exports
  Foundation.plugin(Drilldown, 'Drilldown');
}(jQuery);