/*
* This is plugin built by Karel-Jan
* http://sandbox.tinctuur.be/tree/
* It has been modified to work with jquery ui 1.7.2
* The serialize function has been completely changed.
*/
(function($) {

$.widget("ui.tree", {
	_init: function() {

		var self = this;

		this.element.sortable({
			items: "li",
			distance: this.options.distance,
			placeholder: this.options.placeholder,
			helper: this.options.helper,
			handle: this.options.handle,
			scroll: this.options.scroll,
			appendTo: this.options.appendTo,
			beforeStop: '',
			afterStop: '',
			originalPosition: {},
			cursor: "move",
			start: function(e, ui) {
				ui.item.after('<li class="ui-tree-startpoint" style="display: none"></li>');
			},
			stop: function(e, ui) {

				if(typeof(self.options.beforeStop) == 'function'){
					self.options.beforeStop(e, ui);
				}

				var $prevItem = $(ui.item).prev();

				if($prevItem.hasClass('ui-tree-startpoint')) {
					$prevItem = $(ui.item).prev().prev();
				}

				if(this.revertItem){
					$('.ui-tree-startpoint').after(ui.item);
				}
				else{
					if(this.nestItem){
						var itemBefore = $prevItem;
						var ul = itemBefore.find("ul");
						if(!ul.length) {
							var ul = $("<ul></ul>").appendTo(itemBefore);
						}

						$(ui.item).appendTo(itemBefore.find("> ul") );

						if(ui.item.parents('ul').length + $("ul", ui.item).length >= self.options.maxDepth){
							$('li', ui.item).appendTo(ui.item.parent());
						}
					}
				}

				$('.ui-tree-startpoint').remove();

				if(typeof(self.options.afterStop) == 'function'){
					self.options.afterStop(e, ui);
				}
			},
			sort: function(e, ui) {
				var itemBefore = $(ui.placeholder).prev();
				if(itemBefore.is('.ui-sortable-helper')) itemBefore = $('.ui-sortable-helper').prev();
				if(itemBefore.is('.ui-tree-startpoint')) itemBefore = $('.ui-sortable-helper').prev();
				if(itemBefore.is('li') && !itemBefore.is('.ui-sortable-helper')){
					var itemBeforePosLeft = $('#staticListlinksList > li').position().left;
					if(ui.position.left > itemBeforePosLeft + self.options.tabSize){
						if(self.options.maxDepth > 0 && (ui.placeholder.parents('ul').length + $("ul", ui.placeholder).length) >= self.options.maxDepth){
							this.nestItem = false;
							ui.placeholder.addClass(self.options.maxDepthError);
							ui.placeholder.html(self.options.maxDepthErrorText);
						}
						else{
							this.nestItem = true;
							if(ui.placeholder.hasClass(self.options.maxDepthError)) ui.placeholder.html('');
							ui.placeholder.removeClass(self.options.maxDepthError);
						}
						ui.placeholder.css({marginLeft: self.options.tabSize+"px"});
					}
					else{
						this.nestItem = false;
						ui.placeholder.css({marginLeft: "0px"});
						if(ui.placeholder.hasClass(self.options.maxDepthError)) ui.placeholder.html('');
						ui.placeholder.removeClass(self.options.maxDepthError);
					}

					var level = ui.placeholder.parents('ul').length;
					this.nestItem?level++:level;

					if(self.options.maxItems[level-1]){
						var ul = $(" > ul",itemBefore);
						var currentNrOfItems = this.nestItem ? $(' > li', ul).length+1 : $(' > li', ui.placeholder.parent()).length;

						if($(ui.placeholder).parent().get(0) == $(ui.item).parent().get(0) && !this.nestItem && this.placeholderIndex != 0)currentNrOfItems -= 2;
						if(ul.get(0) == $(ui.item).parent().get(0) && this.nestItem && this.placeholderIndex != 0)currentNrOfItems -= 2;

						if(currentNrOfItems > self.options.maxItems[level-1]){
							ui.placeholder.addClass(self.options.maxItemsError);
							ui.placeholder.html(self.options.maxItemsErrorText);
							this.revertItem = true;
						}
						else{
							if(ui.placeholder.hasClass(self.options.maxItemsError)) ui.placeholder.html('');
							ui.placeholder.removeClass(self.options.maxItemsError);
							this.revertItem = false;
						}

					}
					else{
						if(ui.placeholder.hasClass(self.options.maxItemsError)) ui.placeholder.html('');
						ui.placeholder.removeClass(self.options.maxItemsError);
						this.revertItem = false;
					}
				}
			},
			change: function(e, ui){
				this.placeholderIndex =  $("li",$(ui.placeholder).parent()).index($(ui.placeholder));
				if(this.placeholderIndex == 0){
					this.nestItem = false;
					ui.placeholder.css({marginLeft: "0px"});
					ui.placeholder.removeClass(self.options.maxDepthError);

					var level = ui.placeholder.parents('ul').length;

					if(self.options.maxItems[level-1]){
						var currentNrOfItems = $(' > li', ui.placeholder.parent()).length;

						if($(ui.placeholder).parent().get(0) == $(ui.item).parent().get(0))currentNrOfItems -= 2;

						if(currentNrOfItems > self.options.maxItems[level-1]){
							ui.placeholder.addClass(self.options.maxItemsError);
							ui.placeholder.html(self.options.maxItemsErrorText);
							this.revertItem = true;
						}
						else{
							if(ui.placeholder.hasClass(self.options.maxItemsError)){
								ui.placeholder.html('');
							}
							ui.placeholder.removeClass(self.options.maxItemsError);
							this.revertItem = false;
						}
					}
					else{
						if(ui.placeholder.hasClass(self.options.maxItemsError)) {
							ui.placeholder.html('');
						}
						ui.placeholder.removeClass(self.options.maxItemsError);
						this.revertItem = false;
					}
				}
			}
		});

		//Make certain nodes droppable

		$(this.options.dropOn, this.element).droppable({
			accept: "li",
			tolerance: "guess"
		});
	},
	serialize: function(o) {

		var items = this._getItemsAsjQuery();
		var counter = 1;
		var str = []; o = o || {};

		$(items).each(function() {
			var res = ($(this.item || this).attr(o.attribute || 'id') || '').match(o.expression || (/(.+)[-=_](.+)/));
			if(res){

				var subItems = $('li', this.item || this);
				if(subItems.length > 0){
					 str.push((o.key || res[1]+'['+counter+']')+'='+(o.key && o.expression ? res[1] : res[2])+'_'+subItems.length);
				}
				else{
					str.push((o.key || res[1]+'['+counter+']')+'='+(o.key && o.expression ? res[1] : res[2]));
				}
				counter++;
			}
		});

		return str.join('&');
	},
	toArray: function(o) {

		var items = this._getItemsAsjQuery(o && o.connected);
		var ret = [];

		items.each(function() { ret.push($(this).attr(o.attr || 'id')); });
		return ret;

	},
	_getItemsAsjQuery: function() {

		var items = [];
		var queries = [];
		var sortOn = 'li';

		queries.push([$.isFunction(sortOn) ? sortOn.call(this.element, null, { options: this.options, item: this.currentItem }) : $(sortOn, this.element).not(".ui-sortable-helper"), this]);

		for (var i = queries.length - 1; i >= 0; i--){
			queries[i][0].each(function() {
				items.push(this);
			});
		};

		return $(items);

	}
});

$.extend($.ui.tree, {
	getter: "serialize toArray",
	defaults: {
		tabSize: 40,
		maxDepth: -1,
		afterStop: '',
		beforeStop: '',
		maxDepthError: 'ui-tree-deptherror',
		maxDepthErrorText: 'Only three levels are alowed!',
		maxItems: [],
		maxItemsError: 'ui-tree-limiterror',
		maxItemsErrorText: 'You have reached the maximum number of items for this level!',
		placeholder: 'ui-tree-placeholder'
	}
});

})(jQuery);