/* BoxWidget()
 * ======
 * Adds box widget functions to boxes.
 *
 * @Usage: $('.my-box').boxWidget(options)
 *         This plugin auto activates on any element using the `.box` class
 *         Pass any option as data-option="value"
 */
+function ($) {
  'use strict';

  var DataKey = 'lte.boxwidget';

  var Default = {
    animationSpeed : 500,
    collapseTrigger: '[data-widget="collapse"]',
    removeTrigger  : '[data-widget="remove"]',
    collapseIcon   : 'fa-minus',
    expandIcon     : 'fa-plus',
    removeIcon     : 'fa-times'
  };

  var Selector = {
    data     : '.box',
    collapsed: '.collapsed-box',
    header   : '.box-header',
    body     : '.box-body',
    footer   : '.box-footer',
    tools    : '.box-tools'
  };

  var ClassName = {
    collapsed: 'collapsed-box'
  };

  var Event = {
        collapsing: 'collapsing.boxwidget',
        collapsed: 'collapsed.boxwidget',
        expanding: 'expanding.boxwidget',
        expanded: 'expanded.boxwidget',
        removing: 'removing.boxwidget',
        removed: 'removed.boxwidget'        
    };

  // BoxWidget Class Definition
  // =====================
  var BoxWidget = function (element, options) {
    this.element = element;
    this.options = options;

    this._setUpListeners();
  };

  BoxWidget.prototype.toggle = function () {
    var isOpen = !$(this.element).is(Selector.collapsed);

    if (isOpen) {
      this.collapse();
    } else {
      this.expand();
    }
  };

  BoxWidget.prototype.expand = function () {
    var expandedEvent = $.Event(Event.expanded);
    var expandingEvent = $.Event(Event.expanding);
    var collapseIcon  = this.options.collapseIcon;
    var expandIcon    = this.options.expandIcon;

    $(this.element).removeClass(ClassName.collapsed);

    $(this.element)
      .children(Selector.header + ', ' + Selector.body + ', ' + Selector.footer)
      .children(Selector.tools)
      .find('.' + expandIcon)
      .removeClass(expandIcon)
      .addClass(collapseIcon);

    $(this.element).children(Selector.body + ', ' + Selector.footer)
      .slideDown(this.options.animationSpeed, function () {
        $(this.element).trigger(expandedEvent);
      }.bind(this))
      .trigger(expandingEvent);
  };

  BoxWidget.prototype.collapse = function () {
    var collapsedEvent = $.Event(Event.collapsed);
    var collapsingEvent = $.Event(Event.collapsing);
    var collapseIcon   = this.options.collapseIcon;
    var expandIcon     = this.options.expandIcon;

    $(this.element)
      .children(Selector.header + ', ' + Selector.body + ', ' + Selector.footer)
      .children(Selector.tools)
      .find('.' + collapseIcon)
      .removeClass(collapseIcon)
      .addClass(expandIcon);

    $(this.element).children(Selector.body + ', ' + Selector.footer)
      .slideUp(this.options.animationSpeed, function () {
        $(this.element).addClass(ClassName.collapsed);
        $(this.element).trigger(collapsedEvent);
      }.bind(this))
      .trigger(expandingEvent);
  };

  BoxWidget.prototype.remove = function () {
    var removedEvent = $.Event(Event.removed);
    var removingEvent = $.Event(Event.removing);

    $(this.element).slideUp(this.options.animationSpeed, function () {
      $(this.element).trigger(removedEvent);
      $(this.element).remove();
    }.bind(this))
    .trigger(removingEvent);
  };

  // Private

  BoxWidget.prototype._setUpListeners = function () {
    var that = this;

    $(this.element).on('click', this.options.collapseTrigger, function (event) {
      if (event) event.preventDefault();
      that.toggle($(this));
      return false;
    });

    $(this.element).on('click', this.options.removeTrigger, function (event) {
      if (event) event.preventDefault();
      that.remove($(this));
      return false;
    });
  };

  // Plugin Definition
  // =================
  function Plugin(option) {
    return this.each(function () {
      var $this = $(this);
      var data  = $this.data(DataKey);

      if (!data) {
        var options = $.extend({}, Default, $this.data(), typeof option == 'object' && option);
        $this.data(DataKey, (data = new BoxWidget($this, options)));
      }

      if (typeof option == 'string') {
        if (typeof data[option] == 'undefined') {
          throw new Error('No method named ' + option);
        }
        data[option]();
      }
    });
  }

  var old = $.fn.boxWidget;

  $.fn.boxWidget             = Plugin;
  $.fn.boxWidget.Constructor = BoxWidget;

  // No Conflict Mode
  // ================
  $.fn.boxWidget.noConflict = function () {
    $.fn.boxWidget = old;
    return this;
  };

  // BoxWidget Data API
  // ==================
  $(window).on('load', function () {
    $(Selector.data).each(function () {
      Plugin.call($(this));
    });
  });
}(jQuery);
