'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 ($) {

  /**
   * DropdownMenu module.
   * @module foundation.dropdown-menu
   * @requires foundation.util.keyboard
   * @requires foundation.util.box
   * @requires foundation.util.nest
   */

  var DropdownMenu = function () {
    /**
     * Creates a new instance of DropdownMenu.
     * @class
     * @fires DropdownMenu#init
     * @param {jQuery} element - jQuery object to make into a dropdown menu.
     * @param {Object} options - Overrides to the default plugin settings.
     */

    function DropdownMenu(element, options) {
      _classCallCheck(this, DropdownMenu);

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

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

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

    /**
     * Initializes the plugin, and calls _prepareMenu
     * @private
     * @function
     */


    _createClass(DropdownMenu, [{
      key: '_init',
      value: function _init() {
        var subs = this.$element.find('li.is-dropdown-submenu-parent');
        this.$element.children('.is-dropdown-submenu-parent').children('.is-dropdown-submenu').addClass('first-sub');

        this.$menuItems = this.$element.find('[role="menuitem"]');
        this.$tabs = this.$element.children('[role="menuitem"]');
        this.$tabs.find('ul.is-dropdown-submenu').addClass(this.options.verticalClass);

        if (this.$element.hasClass(this.options.rightClass) || this.options.alignment === 'right' || Foundation.rtl() || this.$element.parents('.top-bar-right').is('*')) {
          this.options.alignment = 'right';
          subs.addClass('opens-left');
        } else {
          subs.addClass('opens-right');
        }
        this.changed = false;
        this._events();
      }
    }, {
      key: '_events',

      /**
       * Adds event listeners to elements within the menu
       * @private
       * @function
       */
      value: function _events() {
        var _this = this,
            hasTouch = 'ontouchstart' in window || typeof window.ontouchstart !== 'undefined',
            parClass = 'is-dropdown-submenu-parent';

        // used for onClick and in the keyboard handlers
        var handleClickFn = function (e) {
          var $elem = $(e.target).parentsUntil('ul', '.' + parClass),
              hasSub = $elem.hasClass(parClass),
              hasClicked = $elem.attr('data-is-click') === 'true',
              $sub = $elem.children('.is-dropdown-submenu');

          if (hasSub) {
            if (hasClicked) {
              if (!_this.options.closeOnClick || !_this.options.clickOpen && !hasTouch || _this.options.forceFollow && hasTouch) {
                return;
              } else {
                e.stopImmediatePropagation();
                e.preventDefault();
                _this._hide($elem);
              }
            } else {
              e.preventDefault();
              e.stopImmediatePropagation();
              _this._show($elem.children('.is-dropdown-submenu'));
              $elem.add($elem.parentsUntil(_this.$element, '.' + parClass)).attr('data-is-click', true);
            }
          } else {
            return;
          }
        };

        if (this.options.clickOpen || hasTouch) {
          this.$menuItems.on('click.zf.dropdownmenu touchstart.zf.dropdownmenu', handleClickFn);
        }

        if (!this.options.disableHover) {
          this.$menuItems.on('mouseenter.zf.dropdownmenu', function (e) {
            var $elem = $(this),
                hasSub = $elem.hasClass(parClass);

            if (hasSub) {
              clearTimeout(_this.delay);
              _this.delay = setTimeout(function () {
                _this._show($elem.children('.is-dropdown-submenu'));
              }, _this.options.hoverDelay);
            }
          }).on('mouseleave.zf.dropdownmenu', function (e) {
            var $elem = $(this),
                hasSub = $elem.hasClass(parClass);
            if (hasSub && _this.options.autoclose) {
              if ($elem.attr('data-is-click') === 'true' && _this.options.clickOpen) {
                return false;
              }

              clearTimeout(_this.delay);
              _this.delay = setTimeout(function () {
                _this._hide($elem);
              }, _this.options.closingTime);
            }
          });
        }
        this.$menuItems.on('keydown.zf.dropdownmenu', function (e) {
          var $element = $(e.target).parentsUntil('ul', '[role="menuitem"]'),
              isTab = _this.$tabs.index($element) > -1,
              $elements = isTab ? _this.$tabs : $element.siblings('li').add($element),
              $prevElement,
              $nextElement;

          $elements.each(function (i) {
            if ($(this).is($element)) {
              $prevElement = $elements.eq(i - 1);
              $nextElement = $elements.eq(i + 1);
              return;
            }
          });

          var nextSibling = function () {
            if (!$element.is(':last-child')) {
              $nextElement.children('a:first').focus();
              e.preventDefault();
            }
          },
              prevSibling = function () {
            $prevElement.children('a:first').focus();
            e.preventDefault();
          },
              openSub = function () {
            var $sub = $element.children('ul.is-dropdown-submenu');
            if ($sub.length) {
              _this._show($sub);
              $element.find('li > a:first').focus();
              e.preventDefault();
            } else {
              return;
            }
          },
              closeSub = function () {
            //if ($element.is(':first-child')) {
            var close = $element.parent('ul').parent('li');
            close.children('a:first').focus();
            _this._hide(close);
            e.preventDefault();
            //}
          };
          var functions = {
            open: openSub,
            close: function () {
              _this._hide(_this.$element);
              _this.$menuItems.find('a:first').focus(); // focus to first element
              e.preventDefault();
            },
            handled: function () {
              e.stopImmediatePropagation();
            }
          };

          if (isTab) {
            if (_this.$element.hasClass(_this.options.verticalClass)) {
              // vertical menu
              if (_this.options.alignment === 'left') {
                // left aligned
                $.extend(functions, {
                  down: nextSibling,
                  up: prevSibling,
                  next: openSub,
                  previous: closeSub
                });
              } else {
                // right aligned
                $.extend(functions, {
                  down: nextSibling,
                  up: prevSibling,
                  next: closeSub,
                  previous: openSub
                });
              }
            } else {
              // horizontal menu
              $.extend(functions, {
                next: nextSibling,
                previous: prevSibling,
                down: openSub,
                up: closeSub
              });
            }
          } else {
            // not tabs -> one sub
            if (_this.options.alignment === 'left') {
              // left aligned
              $.extend(functions, {
                next: openSub,
                previous: closeSub,
                down: nextSibling,
                up: prevSibling
              });
            } else {
              // right aligned
              $.extend(functions, {
                next: closeSub,
                previous: openSub,
                down: nextSibling,
                up: prevSibling
              });
            }
          }
          Foundation.Keyboard.handleKey(e, 'DropdownMenu', functions);
        });
      }

      /**
       * Adds an event handler to the body to close any dropdowns on a click.
       * @function
       * @private
       */

    }, {
      key: '_addBodyHandler',
      value: function _addBodyHandler() {
        var $body = $(document.body),
            _this = this;
        $body.off('mouseup.zf.dropdownmenu touchend.zf.dropdownmenu').on('mouseup.zf.dropdownmenu touchend.zf.dropdownmenu', function (e) {
          var $link = _this.$element.find(e.target);
          if ($link.length) {
            return;
          }

          _this._hide();
          $body.off('mouseup.zf.dropdownmenu touchend.zf.dropdownmenu');
        });
      }

      /**
       * Opens a dropdown pane, and checks for collisions first.
       * @param {jQuery} $sub - ul element that is a submenu to show
       * @function
       * @private
       * @fires DropdownMenu#show
       */

    }, {
      key: '_show',
      value: function _show($sub) {
        var idx = this.$tabs.index(this.$tabs.filter(function (i, el) {
          return $(el).find($sub).length > 0;
        }));
        var $sibs = $sub.parent('li.is-dropdown-submenu-parent').siblings('li.is-dropdown-submenu-parent');
        this._hide($sibs, idx);
        $sub.css('visibility', 'hidden').addClass('js-dropdown-active').attr({ 'aria-hidden': false }).parent('li.is-dropdown-submenu-parent').addClass('is-active').attr({ 'aria-expanded': true });
        var clear = Foundation.Box.ImNotTouchingYou($sub, null, true);
        if (!clear) {
          var oldClass = this.options.alignment === 'left' ? '-right' : '-left',
              $parentLi = $sub.parent('.is-dropdown-submenu-parent');
          $parentLi.removeClass('opens' + oldClass).addClass('opens-' + this.options.alignment);
          clear = Foundation.Box.ImNotTouchingYou($sub, null, true);
          if (!clear) {
            $parentLi.removeClass('opens-' + this.options.alignment).addClass('opens-inner');
          }
          this.changed = true;
        }
        $sub.css('visibility', '');
        if (this.options.closeOnClick) {
          this._addBodyHandler();
        }
        /**
         * Fires when the new dropdown pane is visible.
         * @event DropdownMenu#show
         */
        this.$element.trigger('show.zf.dropdownmenu', [$sub]);
      }

      /**
       * Hides a single, currently open dropdown pane, if passed a parameter, otherwise, hides everything.
       * @function
       * @param {jQuery} $elem - element with a submenu to hide
       * @param {Number} idx - index of the $tabs collection to hide
       * @private
       */

    }, {
      key: '_hide',
      value: function _hide($elem, idx) {
        var $toClose;
        if ($elem && $elem.length) {
          $toClose = $elem;
        } else if (idx !== undefined) {
          $toClose = this.$tabs.not(function (i, el) {
            return i === idx;
          });
        } else {
          $toClose = this.$element;
        }
        var somethingToClose = $toClose.hasClass('is-active') || $toClose.find('.is-active').length > 0;

        if (somethingToClose) {
          $toClose.find('li.is-active').add($toClose).attr({
            'aria-expanded': false,
            'data-is-click': false
          }).removeClass('is-active');

          $toClose.find('ul.js-dropdown-active').attr({
            'aria-hidden': true
          }).removeClass('js-dropdown-active');

          if (this.changed || $toClose.find('opens-inner').length) {
            var oldClass = this.options.alignment === 'left' ? 'right' : 'left';
            $toClose.find('li.is-dropdown-submenu-parent').add($toClose).removeClass('opens-inner opens-' + this.options.alignment).addClass('opens-' + oldClass);
            this.changed = false;
          }
          /**
           * Fires when the open menus are closed.
           * @event DropdownMenu#hide
           */
          this.$element.trigger('hide.zf.dropdownmenu', [$toClose]);
        }
      }

      /**
       * Destroys the plugin.
       * @function
       */

    }, {
      key: 'destroy',
      value: function destroy() {
        this.$menuItems.off('.zf.dropdownmenu').removeAttr('data-is-click').removeClass('is-right-arrow is-left-arrow is-down-arrow opens-right opens-left opens-inner');
        $(document.body).off('.zf.dropdownmenu');
        Foundation.Nest.Burn(this.$element, 'dropdown');
        Foundation.unregisterPlugin(this);
      }
    }]);

    return DropdownMenu;
  }();

  /**
   * Default settings for plugin
   */


  DropdownMenu.defaults = {
    /**
     * Disallows hover events from opening submenus
     * @option
     * @example false
     */
    disableHover: false,
    /**
     * Allow a submenu to automatically close on a mouseleave event, if not clicked open.
     * @option
     * @example true
     */
    autoclose: true,
    /**
     * Amount of time to delay opening a submenu on hover event.
     * @option
     * @example 50
     */
    hoverDelay: 50,
    /**
     * Allow a submenu to open/remain open on parent click event. Allows cursor to move away from menu.
     * @option
     * @example true
     */
    clickOpen: false,
    /**
     * Amount of time to delay closing a submenu on a mouseleave event.
     * @option
     * @example 500
     */

    closingTime: 500,
    /**
     * Position of the menu relative to what direction the submenus should open. Handled by JS.
     * @option
     * @example 'left'
     */
    alignment: 'left',
    /**
     * Allow clicks on the body to close any open submenus.
     * @option
     * @example true
     */
    closeOnClick: true,
    /**
     * Class applied to vertical oriented menus, Foundation default is `vertical`. Update this if using your own class.
     * @option
     * @example 'vertical'
     */
    verticalClass: 'vertical',
    /**
     * Class applied to right-side oriented menus, Foundation default is `align-right`. Update this if using your own class.
     * @option
     * @example 'align-right'
     */
    rightClass: 'align-right',
    /**
     * Boolean to force overide the clicking of links to perform default action, on second touch event for mobile.
     * @option
     * @example false
     */
    forceFollow: true
  };

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