/**
 * @author 张慧华 z@j-ui.com
 */
(function($){
	DWZ.miscDrag = {
		start:function($sortBox, $item, event, op){

			var $helper = $item.clone();
			var position = $item.position();

			$helper.addClass('sortDragHelper').css({
				position:'absolute',
				top:position.top+$sortBox.scrollTop(),
				left:position.left,
				zIndex:op.zIndex,
				minWidth:$item.width()+'px',
				height:$item.height()+'px'
			}).jDrag({
				drag:this.drag,
				stop:this.stop,
				event:event
			});
			$helper.data('$sortBox', $sortBox);

			$item.before($helper);
			return false;
		},
		drag:function(el, event){
		},
		stop:function(el, event){
			var $helper = $(arguments[0]),
				$sortBox = $helper.data('$sortBox'),
				$overBox = DWZ.miscDrag._getOverSortBox($sortBox.find($sortBox.attr('drag-rel')), $helper);

			if ($overBox.length > 0){ //移动到指定容器

				var $dragBox = $helper.appendTo($overBox).mousedown(function(event){
					$(this).jDrag({event:event});
				});

				var txt = $dragBox.html(),
					icon = $dragBox.attr('data-icon'),
					sn = $dragBox.attr('data-sn'),
					sequence = $overBox.find('> div').size();

				var overBoxPos = $overBox.position(),
					dragBoxPos = $dragBox.position();

				var content = icon ? '<img src="'+icon+'" />' : txt;
				$dragBox.attr('data-sequence', sequence).html(' <h2>' + sequence + '</h2>' + content).css({
					height: 'auto',
					top:(dragBoxPos.top - overBoxPos.top) + 'px',
					left:(dragBoxPos.left - overBoxPos.left) + 'px'
				});

				var rel = $sortBox.attr('rel');
				if (rel) {
					$('<div class="sortDrag" data-sn="'+sn+'"><h2>'+sequence+'</h2></div>').appendTo(rel);
				}
			} else {
				$helper.remove();
			}
		},

		_getOverSortBox:function($sortBox, $item){
			var itemPos = $item.position();
			var y = itemPos.top+($item.height()/2), x = itemPos.left+($item.width()/2);
			return $sortBox.filter(':visible').filter(function(){
				var $sortBox = $(this), sortBoxPos = $sortBox.offset(),
					sortBoxH = $sortBox.height(), sortBoxW = $sortBox.width();
				return DWZ.isOver(y, x, sortBoxPos.top, sortBoxPos.left, sortBoxH, sortBoxW);
			});
		},
		_createPlaceholder:function($item){
			return $('<'+$item[0].nodeName+' class="sortDragPlaceholder"/>').css({
				// width:$item.outerWidth()+'px',
				height:$item.outerHeight()+'px',
				marginTop:$item.css('marginTop'),
				marginRight:$item.css('marginRight'),
				marginBottom:$item.css('marginBottom'),
				marginLeft:$item.css('marginLeft')
			});
		},
		startSortDrag:function($sortBox, $item, event, op){
			var $placeholder = this._createPlaceholder($item);
			var $helper = $item.clone();
			var position = $item.position();
			$helper.data('$sortBox', $sortBox).data('op', op).data('$item', $item).data('$placeholder', $placeholder);
			$helper.addClass('sortDragHelper').css({
				position:'absolute',
				top:position.top+$sortBox.scrollTop(),
				left:position.left,
				zIndex:op.zIndex,
				width:$item.width()+'px',
				height:$item.height()+'px'
			}).jDrag({
				drag:this.dragSortDrag,
				stop:this.stopSortDrag,
				event:event
			});

			$item.before($helper).before($placeholder);
			return false;
		},
		dragSortDrag:function(el, event){
			var $helper = $(arguments[0]), $sortBox = $helper.data('$sortBox'),
				$placeholder = $helper.data('$placeholder');

			// 修复出现滚动条拖拽位置
			var $unitBox = $helper.parents(".unitBox:first"),
				position = $helper.offset();
			$helper.css({
				top:position.top+$unitBox.scrollTop()
			});

			var $dragList = $($sortBox.attr('drag-rel'));

			for (var i=0; i<$dragList.size(); i++) {

				var $overBox = DWZ.miscDrag._getOverSortBox($dragList.eq(i), $helper);

				if ($overBox.length > 0 && $overBox[0] != $sortBox[0]){ //移动到其他容器
					$placeholder.appendTo($overBox);
				}
			}

		},
		stopSortDrag:function(){
			var $helper = $(arguments[0]), $sortBox = $helper.data('$sortBox'),
				$placeholder = $helper.data('$placeholder'), $item = $helper.data('$item');

			if ($placeholder && $placeholder.is(':visible')) {
				var position = $placeholder.offset();

				$helper.animate({
						top: (position.top+$sortBox.scrollTop()) + "px",
						left: position.left + "px"
					},
					{
						complete: function(){
							//复制到目标容器
							var $destBox = $placeholder.parents(".sortDrag:first");
							//var html = $helper.html()+'<span class="close">×</span>';
							var html = $helper.html();

							$destBox.append('<div class="dragItem" data-sn="'+$helper.attr('data-sn')+'" data-name="'+$helper.attr('data-name')+'">'+html+'</div>');

							$placeholder.remove();
							$helper.remove();
							if ($sortBox.attr('data-duplicate') != 1) {$item.remove();}

							//从新绑定sortDrag
							$destBox.sortDrag({refresh:true});
						},
						duration: 300
					}
				);
			} else {
				$placeholder.remove();
				$helper.remove();
			}

		}
	};

	$.fn.extend({
		miscDrag: function(options){
			var op = $.extend({
				cursor: 'move', // selector 的鼠标手势
				sortBoxs: 'div.miscDrag', //拖动排序项父容器
				replace: false, //2个sortBox之间拖动替换
				items: '> dt .dragBox', //拖动排序项选择器
				zIndex: 1000
			}, options);

			return this.each(function(){
				var $box = $(this);
				$box.find(op.items).each(function(i){
					var $item = $(this);
					$item.mousedown(function(event){
						DWZ.miscDrag.start($box, $item, event, op);

						event.preventDefault();
					});
				});
			});
		},
		miscDragData: function(){
			var $miscDrag = $(this),
				$miscSortDrag = $($miscDrag.attr('rel')),
				$dragBoxList = $miscDrag.find('dd .dragBox'),
				$sortDragList = $miscSortDrag.find('.sortDrag');

			var data = [];
			for (var i=0; i<$dragBoxList.size(); i++) {
				var $dragBox = $dragBoxList.eq(i), $sortDrag = $sortDragList.eq(i),
					$dragBoxPos = $dragBox.position();

				var dataItem = {
					sn: $dragBox.attr('data-sn'),
					sequence: $dragBox.attr('data-sequence'),
					top: parseInt($dragBoxPos.top),
					left: parseInt($dragBoxPos.left),
					items: []
				};

				$sortDrag.find('.dragItem').each(function(index){
					var $dragItem = $(this),
						$dragItemPos = $dragItem.position();
					dataItem.items.push({
						sn: $dragItem.attr('data-sn'),
						sequence: index + 1
					});
				});

				data.push(dataItem)
			}

			return data;
		},

		miscSortDragData: function(){
			var $miscSortDrag = $(this),
				$sortDragList = $miscSortDrag.find('.sortDrag');

			var data = [];
			for (var i=0; i<$sortDragList.size(); i++) {
				var $sortDrag = $sortDragList.eq(i)

				var dataItem = {
					sn: $sortDrag.attr('data-sn'),
					name: $sortDrag.attr('data-name') || '',
					sequence: i+1,
					items: []
				};

				$sortDrag.find('.dragItem').each(function(index){
					var $dragItem = $(this);
					var itemData = {
						sn: $dragItem.attr('data-sn'),
						name: $dragItem.attr('data-name') || '',
						sequence: index + 1
					};

					$dragItem.find('.ctl-label :checkbox').each(function(){
						var $lable = $(this), lableName = $lable.attr('name');
						if (lableName) {
							itemData[lableName] = $lable.is(":checked");
						}
					});

					dataItem.items.push(itemData);
				});

				data.push(dataItem);
			}

			return data;
		},

		miscSortDrag: function(options){
			var op = $.extend({
				cursor: 'move', // selector 的鼠标手势
				sortBoxs: 'dl.miscSortDrag', //拖动排序项父容器
				replace: false, //2个sortBox之间拖动替换
				items: '> dt .dragItem', //拖动排序项选择器
				zIndex: 1000
			}, options);

			return this.each(function(){

				var $sortBox = $(this);

				$sortBox.find(op.items).each(function(i){
					var $item = $(this);

					$item.mousedown(function(event){
						DWZ.miscDrag.startSortDrag($sortBox, $item, event, op);

						event.preventDefault();
					});
				});

			});
		}
	});
})(jQuery);