(function ($)
{

    var methods = {

        init: function ()
        {
            return this.each(function ()
            {
                var $this = $(this);
                if ($this.hasClass("DLTreeMenu") === false)
                {
                    $this.hide();
                    $(this).addClass("DLTreeMenu");
                    $this.children("li").each(function ()
                    {
                        methods.buildNode($(this));
                    });
                    $(this).show();
                }
            });
        },

        buildNode: function ($li)
        {
            if ($li.children("ul").length > 0)
            {
                $li.children("ul").hide();
                $li.children("ul").find("li a").each(function ()
                {
                    if ($(this).hasClass("active"))
                    {
                        $li.children("ul").show();
                        $li.addClass("expanded");
                        return;
                    }
                });

//                if (!$li.hasClass("expanded"))
//                {
//                    $li.children("ul").hide();
//                }

                $li.addClass("Node").click(function (event)
                {
                    var $t = $(this);
                    if ($t.hasClass("expanded"))
                    {
                        $t.removeClass("expanded");
                        $t.children("ul").slideUp();
                    }
                    else
                    {
                        $t.addClass("expanded");
                        $t.children("ul").slideDown();
                    }
                    event.stopPropagation();
                });

                $li.children("ul").children("li").each(function ()
                {
                    methods.buildNode($(this));
                });
            }
            else
            {
                $li.addClass("Leaf").click(function (event)
                {
                    event.stopPropagation();
                });
                return;
            }
        },

        expandToNode: function ($li)
        {
            if ($li.parent().hasClass("simpleTreeMenu"))
            {
                if (!$li.hasClass("expanded"))
                {
                    $li.addClass("expanded");
                    $li.children("ul").show();
                }
            }
            $li.parents("li", "ul.simpleTreeMenu").each(function ()
            {
                var $t = jQuery(this);
                if (!$t.hasClass("expanded"))
                {
                    $t.addClass("expanded");
                    $t.children("ul").show();
                }
            });
        },

        expandAll: function ()
        {
            jQuery(this).find("li.Node").each(function ()
            {
                $t = jQuery(this);
                if (!$t.hasClass("expanded"))
                {
                    $t.addClass("expanded");
                    $t.children("ul").show();
                }
            });
        },

        closeAll: function ()
        {
            jQuery("ul", jQuery(this)).hide();
            var $li = jQuery("li.Node");
            if ($li.hasClass("expanded"))
            {
                $li.removeClass("expanded");
            }
        }

    };

    $.fn.DLTreeMenu = function (method)
    {
        if (methods[method])
        {
            return methods[method].apply(this, Array.prototype.slice.call(arguments, 1));
        } else if (typeof method === 'object' || !method)
        {
            return methods.init.apply(this, arguments);
        } else
        {
            $.error('Method ' + method + ' does not exist on jQuery.DLTreeMenu');
        }
    };

})(jQuery);