/*
* jQuery widget to create themable Tree Lists
* 
* http://jordivila.net/code/js/jquery/ui-widgetTreeList/widgetTreeList.htm
*
*/
var url = "/Disease/GetNodes/";

(function ($) {
    $.widget("jv.treeList", {
        options: { selectable: true },
        _create: function () {
            
            var w = this;
            $.getJSON(url, {}, function (data) {
                $.each(data, function (index, optionData) {
                    if (optionData.hasChildren) {
                        $(w.element).append($("<li></li>")
                        .attr("id", optionData.id)
                        .text(optionData.text).append($("<ul></ul>")));
                    }
                    else {
                        $(w.element).append($("<li></li>")
                        .attr("id", optionData.id)
                        .text(optionData.text));
                    }

                });

                w._initItem($(w.element).children("li"));
                w._initChildList($(w.element).children("li").children("ul"));


            });





            var $lisOpen = $(this.element).find("li[class*='ui-treeList-open']");
            // w.openNode($lisOpen);
            // w.openNode($lisOpen.parents('li'));

            $(this.element)
                .addClass('ui-treeList ui-widget ui-widget-content ui-corner-all')
                .bind('click', function (e) {
                    var $t = $(e.target);
                    if ($t.hasClass('ui-treeList-toggle')) {
                        var b = $t.siblings('ul').is(':visible');
                        if (b) w.closeNode($t.parents('li:first'));
                        else w.openNode($t.parents('li:first'));
                    }
                    if ($t.hasClass('ui-treeList-item')) {
                        w.selected($t);
                    }
                    //return false;
                })
                .disableSelection();
        },
        destroy: function () {

            $(this.element)
            .unbind('click')
            .removeClass('ui-treeList ui-widget ui-widget-content ui-corner-all')
            .find('li')
                .unbind('mouseenter mouseleave')
                .removeClass('ui-treeList-item ui-widget-content ui-corner-all ui-state-default ui-state-active ui-state-hover')
                .children('div.ui-treeList-toggle')
                    .remove()
                .end()
                .find('ul')
                    .unbind('mouseenter mouseleave')
                    .removeClass('ui-treeList-childs');

            $.Widget.prototype.destroy.call(this);
        },
        _initItem: function ($lis) {
            $lis.addClass('ui-treeList-item ui-widget-content ui-corner-all ui-state-default')
                  .hover(
                        function () { $(this).addClass('ui-state-hover').parents('li').removeClass('ui-state-hover'); ; return false; }
                        , function () { $(this).removeClass('ui-state-hover'); return false; }
                    );
        },
        _initChildList: function ($uls) {
            $uls.addClass('ui-treeList-childs')
                    .hide()
                    .before('<div class="ui-treeList-toggle ui-widget ui-widget-content ui-corner-all ui-icon ui-icon-plus"></div>');
        },
        openNode: function ($lisOpen) {
            if ($lisOpen) {
                var w = this;
                var node = $lisOpen.children('ul');

                //                w._initItem($lisOpen.children('ul').children("li"));
                //                w._initChildList($lisOpen.children('ul').children("li").children("ul[class='']"));
                $lisOpen.children('ul')
                                .show()
                                .siblings('div.ui-treeList-toggle')
                                    .removeClass('ui-icon-plus')
                                    .addClass('ui-icon ui-icon-minus')
                                    .end()
                                .end()
                                .find('ul:has(li)')
                                    .parents('li')
                                        .removeClass('ui-state-default');
                if(node.children('li').length==0)
                {
                        $.getJSON(url, { root: $lisOpen.attr("id") }, function (data) {
                        $.each(data, function (index, optionData) {
                            if (optionData.hasChildren) {
                                $(node).append($("<li></li>")
                            .attr("id", optionData.id)
                            .text(optionData.text).append($("<ul></ul>")));
                            }
                            else {
                                $(node).append($("<li></li>")
                            .attr("id", optionData.id)
                            .text(optionData.text));
                            }

                        });
                        w._initItem($(node).children("li"));
                        w._initChildList($(node).children("li").children("ul"));
                        $lisOpen.children('ul')
                                .show()
                                .siblings('div.ui-treeList-toggle')
                                    .removeClass('ui-icon-plus')
                                    .addClass('ui-icon ui-icon-minus')
                                    .end()
                                .end()
                                .find('ul:has(li)')
                                    .parents('li')
                                        .removeClass('ui-state-default');
                    });
                }
            }
        }
        ,
        closeNode: function ($lisClose) {
            if ($lisClose) {
                $lisClose.addClass('ui-state-default')
                                .children('ul')
                                .hide()
                                .siblings('div.ui-treeList-toggle').removeClass('ui-icon-minus').addClass('ui-icon ui-icon-plus');
            }
        }
        , selected: function ($lis) {
            if ($lis) {
                $(this.element).find('li').removeClass('ui-state-active');
                $lis.addClass('ui-state-active');
                this._trigger('onSelect');
            }
            else {
                return $(this.element).find('li.ui-state-active');
            }
        }
    });

})(jQuery);