/*!
 * Nestable jQuery Plugin - Copyright (c) 2012 David Bushell - http://dbushell.com/
 * Dual-licensed under the BSD or MIT licenses
 */
;(function($, window, document, undefined)
{
    var hasTouch = 'ontouchstart' in document;

    /**
     * Detect CSS pointer-events property
     * events are normally disabled on the dragging element to avoid conflicts
     * https://github.com/ausi/Feature-detection-technique-for-pointer-events/blob/master/modernizr-pointerevents.js
     */
    var hasPointerEvents = (function()
    {
        var el    = document.createElement('div'),
            docEl = document.documentElement;
        if (!('pointerEvents' in el.style)) {
            return false;
        }
        el.style.pointerEvents = 'auto';
        el.style.pointerEvents = 'x';
        docEl.appendChild(el);
        var supports = window.getComputedStyle && window.getComputedStyle(el, '').pointerEvents === 'auto';
        docEl.removeChild(el);
        return !!supports;
    })();

    var defaults = {
        listNodeName    : 'ol',
        itemNodeName    : 'li',
        rootClass       : 'dd',
        listClass       : 'dd-list',
        itemClass       : 'dd-item',
        dragClass       : 'dd-dragel',
        handleClass     : 'dd-handle',
        collapsedClass  : 'dd-collapsed',
        placeClass      : 'dd-placeholder',
        noDragClass     : 'dd-nodrag',
        emptyClass      : 'dd-empty',
		deleteClass		: 'dd-del',
		itemKey			:'',
		itemName		:'',
		aliasName		:'',
        expandBtnHTML   : '<button data-action="expand" type="button">Expand</button>',
        collapseBtnHTML : '<button data-action="collapse" type="button">Collapse</button>',
        group           : 0,
        maxDepth        : 5,
        threshold       : 20,
		rmSourceItem	:true ,
		addItemCloseBtn	:false,
		dragFlag  :true,
		addItemQuickBtn:false,
		quickKey:'quickKey',
		quickDesc:'quickDesc',
		quickTitle:'快捷',
		quickEnum:[{'key':'是','value':'是'},{'key':'否','value':'否'}],
		data:null,
		dataJsonKey:'json'
    };

    function Plugin(element, options)
    {
        this.w  = $(document);
        this.el = $(element);
        this.options = $.extend({}, defaults, options);
		
        this.init();
    }

    Plugin.prototype = {

        init: function()
        {
            var list = this;
			
			list.buildOl();

            list.reset();

            list.el.data('nestable-group', this.options.group);

            list.placeEl = $('<div class="' + list.options.placeClass + '"/>');

            $.each(this.el.find(list.options.itemNodeName), function(k, el) {
                list.setParent($(el));
            });

            list.el.on('click', 'button', function(e) {
                if (list.dragEl) {
                    return;
                }
                var target = $(e.currentTarget),
                    action = target.data('action'),
                    item   = target.parent(list.options.itemNodeName);
                if (action === 'collapse') {
                    list.collapseItem(item);
                }
                if (action === 'expand') {
                    list.expandItem(item);
                }
            });

            var onStartEvent = function(e)
            {
                var handle = $(e.target);
                if (!handle.hasClass(list.options.handleClass)) {
                    if (handle.closest('.' + list.options.noDragClass).length) {
                        return;
                    }
                    handle = handle.closest('.' + list.options.handleClass);
                }

                if (!handle.length || list.dragEl) {
                    return;
                }

                list.isTouch = /^touch/.test(e.type);
                if (list.isTouch && e.touches.length !== 1) {
                    return;
                }

                e.preventDefault();
                list.dragStart(e.touches ? e.touches[0] : e);
            };

            var onMoveEvent = function(e)
            {
                if (list.dragEl) {
                    e.preventDefault();
                    list.dragMove(e.touches ? e.touches[0] : e);
                }
            };

            var onEndEvent = function(e)
            {
				
                if (list.dragEl) {
                    e.preventDefault();
                    list.dragStop(e.touches ? e.touches[0] : e);
                }
            };

            if (hasTouch) {
                list.el[0].addEventListener('touchstart', onStartEvent, false);
                window.addEventListener('touchmove', onMoveEvent, false);
                window.addEventListener('touchend', onEndEvent, false);
                window.addEventListener('touchcancel', onEndEvent, false);
            }

			if(this.options.dragFlag){
				
				list.el.on('mousedown', onStartEvent);
				list.w.on('mousemove', onMoveEvent);
				list.w.on('mouseup', onEndEvent);
			}
            
			if(this.options.addItemCloseBtn){
				
				list.el.delegate("."+this.options.deleteClass,'click',function(e){
					
					var itemList = $(this).parent().parent();
					
					var length = itemList.children().length;
					
					$(this).parent('.'+list.options.itemClass).remove();
					
					if(length == 1){
						
						itemList.remove();
						
						list.el.append("<div class='"+list.options.emptyClass+"'></div>");
					}
					
				});
			}
			
			//2020年2月19日19:59:49 增加没有数据时插入空图片
			list.el.children().length == 0 && list.el.append("<div class='"+list.options.emptyClass+"'></div>");
			
			$.each(list.el.find("." + list.options.itemClass),function(i,item){
				
				var id = $(item).attr("data-id");
				
				if(id == null || id == undefined || id == ""){
					
					if(util.isNull(list.options.itemKey)){
						
						var num = list.randomNum();
						
						$(item).attr("data-id",num) ;
						
						return true;
					}
					
					
						
					$(item).attr("data-id",$(item).data(list.options.itemKey.toLowerCase())) ;
				}
				
			});
			

        },
		randomNum:function(){
			
			return new Date().getTime()+ parseInt(Math.random()*100000,10);
			
		},

        serialize: function()
        {
            var data,
                depth = 0,
                list  = this;
            step  = function(level, depth)
            {
                var array = [ ],
                    items = level.children(list.options.itemNodeName);
                items.each(function()
                {
                    var li   = $(this),
                        item = $.extend({}, li.data()),
                        sub  = li.children(list.options.listNodeName);
                    if (sub.length) {
                        item.children = step(sub, depth + 1);
                    }
                    array.push(item);
                });
                return array;
            };
            data = step(list.el.find(list.options.listNodeName).first(), depth);
            return data;
        },

        serialise: function()
        {
            return this.serialize();
        },

        reset: function()
        {
            this.mouse = {
                offsetX   : 0,
                offsetY   : 0,
                startX    : 0,
                startY    : 0,
                lastX     : 0,
                lastY     : 0,
                nowX      : 0,
                nowY      : 0,
                distX     : 0,
                distY     : 0,
                dirAx     : 0,
                dirX      : 0,
                dirY      : 0,
                lastDirX  : 0,
                lastDirY  : 0,
                distAxX   : 0,
                distAxY   : 0
            };
            this.isTouch    = false;
            this.moving     = false;
            this.dragEl     = null;
            this.dragRootEl = null;
            this.dragDepth  = 0;
            this.hasNewRoot = false;
            this.pointEl    = null;
			this.sourceIndex  = null;
			this.sourceParent = null;
        },

        expandItem: function(li)
        {
            li.removeClass(this.options.collapsedClass);
            li.children('[data-action="expand"]').hide();
            li.children('[data-action="collapse"]').show();
            li.children(this.options.listNodeName).show();
        },

        collapseItem: function(li)
        {
            var lists = li.children(this.options.listNodeName);
            if (lists.length) {
                li.addClass(this.options.collapsedClass);
                li.children('[data-action="collapse"]').hide();
                li.children('[data-action="expand"]').show();
                li.children(this.options.listNodeName).hide();
            }
        },

        expandAll: function()
        {
            var list = this;
            list.el.find(list.options.itemNodeName).each(function() {
                list.expandItem($(this));
            });
        },

        collapseAll: function()
        {
            var list = this;
            list.el.find(list.options.itemNodeName).each(function() {
                list.collapseItem($(this));
            });
        },

        setParent: function(li)
        {
            if (li.children(this.options.listNodeName).length) {
                li.prepend($(this.options.expandBtnHTML));
                li.prepend($(this.options.collapseBtnHTML));
            }
            li.children('[data-action="expand"]').hide();
        },

        unsetParent: function(li)
        {
            li.removeClass(this.options.collapsedClass);
            li.children('[data-action]').remove();
            li.children(this.options.listNodeName).remove();
        },

        dragStart: function(e)
        {
            var mouse    = this.mouse,
                target   = $(e.target),
                dragItem = target.closest(this.options.itemNodeName);
				
			this.sourceIndex  = dragItem.index();
			
			this.sourceParent  = dragItem.parent();
			
            this.placeEl.css('height', dragItem.height());
			
			
			

            mouse.offsetX = e.offsetX !== undefined ? e.offsetX : e.pageX - target.offset().left;
            mouse.offsetY = e.offsetY !== undefined ? e.offsetY : e.pageY - target.offset().top;
            mouse.startX = mouse.lastX = e.pageX;
            mouse.startY = mouse.lastY = e.pageY;

            this.dragRootEl = this.el;

            this.dragEl = $(document.createElement(this.options.listNodeName)).addClass(this.options.listClass + ' ' + this.options.dragClass);
            this.dragEl.css('width', dragItem.width());

            dragItem.after(this.placeEl);
            dragItem[0].parentNode.removeChild(dragItem[0]);
            dragItem.appendTo(this.dragEl);

            $(document.body).append(this.dragEl);
            this.dragEl.css({
                'left' : e.pageX - mouse.offsetX,
                'top'  : e.pageY - mouse.offsetY
            });
            // total depth of dragging item
            var i, depth,
                items = this.dragEl.find(this.options.itemNodeName);
            for (i = 0; i < items.length; i++) {
                depth = $(items[i]).parents(this.options.listNodeName).length;
                if (depth > this.dragDepth) {
                    this.dragDepth = depth;
                }
            }
        },
		
		getCloseBtnFlag:function(){
			
			return this.options.addItemCloseBtn;
		},
		getQuickBtn:function(){
			
			return this.options.addItemQuickBtn;
		},
		getItems:function(){
			
			return this.el.find("."+this.options.itemClass);
		},
		
		getItemData: function(){
			
			var arr = new Array();
			
			var that =this;
			
			$.each(that.getItems(),function(i,item){
				
				var d = $(item).data("json");
				
				var quickFlag = that.options.quickEnum[1].key;
				
				var checkbox = $(item).find("input[type=checkbox][name="+that.options.quickKey+"]:checked");
				
				if(checkbox.length > 0 ){
					
					quickFlag = that.options.quickEnum[0].key;
				}
				
				d[that.options.quickKey] = checkbox.length > 0 ?  that.options.quickEnum[0].key : that.options.quickEnum[1].key;
				
				d[that.options.quickDesc] = checkbox.length > 0 ?  that.options.quickEnum[0].value : that.options.quickEnum[1].value;
				
				arr.push(d);
				
			});
			
			return arr;
			
		},
		
		getQuickHtml:function(flag){
			
			return  '<div style="float:right;margin-top:-35px;"><input type="checkbox" name="'+this.options.quickKey+'" '+(flag ? 'checked="checked"': '')+' />'+this.options.quickTitle+'</div> ';
		},
		getCloseBtnHtml:function(flag){
			
			var f = flag ? flag :this.options.addItemQuickBtn;
			
			return '<i class="layui-icon layui-icon-delete '+this.options.deleteClass+'" style="font-size: 30px; color:red ;float:right;margin-top:-35px;'+(f?'margin-right:50px;':'')+'"></i> ';
			
		},
		
        dragStop: function(e)
        {
			
			
            var el = this.dragEl.children(this.options.itemNodeName).first();
			
				
            el[0].parentNode.removeChild(el[0]);
			
			var plceRoot = this.placeEl.parents("."+this.options.rootClass);
			
			var item = plceRoot.find("[data-id="+el.attr("data-id")+"]");
			
			if(item.length == 0){
				
				var clone = el.clone();
				
				if(plceRoot.nestable('getQuickBtn') &&  this.el.attr("id")!= plceRoot.attr("id")){
					clone.append(plceRoot.nestable('getQuickHtml'));
				}
				
				if(plceRoot.nestable('getCloseBtnFlag') && this.el.attr("id")!= plceRoot.attr("id")){
					
					clone.append(this.getCloseBtnHtml(plceRoot.nestable('getQuickBtn')));
				}
				
				this.placeEl.replaceWith(clone);
			
			}else{
				this.placeEl.remove();
			}
            this.dragEl.remove();
			
            this.el.trigger('change');
            if (this.hasNewRoot) {
                this.dragRootEl.trigger('change');
            }
			
		
			
			if( !this.options.rmSourceItem){
				
				 var sourceItem = this.el.find("[data-id="+el.attr("data-id")+"]");
				 
				 sourceItem.length == 0 && this.addItem(el);
				
			}
            this.reset();
        },
		addItem :function (el){
				 
				 if(this.sourceParent.children().length == 0){
					 
					 this.sourceParent.append(el.clone());
					 
					 return ;
				 }
				 
				 if(this.sourceIndex == this.sourceParent.children().length){
					 
					 this.sourceParent.append(el.clone());
					 
					 return ;
				 }
				 
				 this.sourceParent.children().eq(this.sourceIndex).before(el.clone());
							 
							 
		},
		buildOl :function (){
			
			var that = this;
			
			if(!util.isNull(that.options.data) && that.options.data.length > 0){
				
				var ol = $('<ol class="dd-list"></ol>');
				
				$.each(that.options.data,function(i,item){
					
					var li = $('<li class="dd-item" ></div>');
					
					li.attr("data-"+that.options.dataJsonKey,JSON.stringify(item));
					li.attr("data-"+that.options.itemKey.toLowerCase(),item[that.options.itemKey]);
					
					var div = $('<div class="dd-handle">'+(util.isNull(item[that.options.aliasName]) ? item[that.options.itemName] : item[that.options.aliasName])+'</div>');
					
					li.append(div);
					
					if(that.options.addItemQuickBtn){
						
						li.append(that.getQuickHtml(item[that.options.quickKey] == that.options.quickEnum[0].key ? true :false));
						
					}
					
					if(that.options.addItemCloseBtn){
						
						li.append(that.getCloseBtnHtml(true));
					}
					
					ol.append(li);
					
				});
				
				that.el.append(ol);
				
			}
		},

        dragMove: function(e)
        {
            var list, parent, prev, next, depth,
                opt   = this.options,
                mouse = this.mouse;

            this.dragEl.css({
                'left' : e.pageX - mouse.offsetX,
                'top'  : e.pageY - mouse.offsetY
            });

            // mouse position last events
            mouse.lastX = mouse.nowX;
            mouse.lastY = mouse.nowY;
            // mouse position this events
            mouse.nowX  = e.pageX;
            mouse.nowY  = e.pageY;
            // distance mouse moved between events
            mouse.distX = mouse.nowX - mouse.lastX;
            mouse.distY = mouse.nowY - mouse.lastY;
            // direction mouse was moving
            mouse.lastDirX = mouse.dirX;
            mouse.lastDirY = mouse.dirY;
            // direction mouse is now moving (on both axis)
            mouse.dirX = mouse.distX === 0 ? 0 : mouse.distX > 0 ? 1 : -1;
            mouse.dirY = mouse.distY === 0 ? 0 : mouse.distY > 0 ? 1 : -1;
            // axis mouse is now moving on
            var newAx   = Math.abs(mouse.distX) > Math.abs(mouse.distY) ? 1 : 0;

            // do nothing on first move
            if (!mouse.moving) {
                mouse.dirAx  = newAx;
                mouse.moving = true;
                return;
            }

            // calc distance moved on this axis (and direction)
            if (mouse.dirAx !== newAx) {
                mouse.distAxX = 0;
                mouse.distAxY = 0;
            } else {
                mouse.distAxX += Math.abs(mouse.distX);
                if (mouse.dirX !== 0 && mouse.dirX !== mouse.lastDirX) {
                    mouse.distAxX = 0;
                }
                mouse.distAxY += Math.abs(mouse.distY);
                if (mouse.dirY !== 0 && mouse.dirY !== mouse.lastDirY) {
                    mouse.distAxY = 0;
                }
            }
            mouse.dirAx = newAx;

            /**
             * move horizontal
             */
            if (mouse.dirAx && mouse.distAxX >= opt.threshold) {
                // reset move distance on x-axis for new phase
                mouse.distAxX = 0;
                prev = this.placeEl.prev(opt.itemNodeName);
                // increase horizontal level if previous sibling exists and is not collapsed
                if (mouse.distX > 0 && prev.length && !prev.hasClass(opt.collapsedClass)) {
                    // cannot increase level when item above is collapsed
                    list = prev.find(opt.listNodeName).last();
                    // check if depth limit has reached
                    depth = this.placeEl.parents(opt.listNodeName).length;
                    if (depth + this.dragDepth <= opt.maxDepth) {
                        // create new sub-level if one doesn't exist
                        if (!list.length) {
                            list = $('<' + opt.listNodeName + '/>').addClass(opt.listClass);
                            list.append(this.placeEl);
                            prev.append(list);
                            this.setParent(prev);
                        } else {
                            // else append to next level up
                            list = prev.children(opt.listNodeName).last();
                            list.append(this.placeEl);
                        }
                    }
                }
                // decrease horizontal level
                if (mouse.distX < 0) {
                    // we can't decrease a level if an item preceeds the current one
                    next = this.placeEl.next(opt.itemNodeName);
                    if (!next.length) {
                        parent = this.placeEl.parent();
                        this.placeEl.closest(opt.itemNodeName).after(this.placeEl);
                        if (!parent.children().length) {
                            this.unsetParent(parent.parent());
                        }
                    }
                }
            }

            var isEmpty = false;

            // find list item under cursor
            if (!hasPointerEvents) {
                this.dragEl[0].style.visibility = 'hidden';
            }
            this.pointEl = $(document.elementFromPoint(e.pageX - document.body.scrollLeft, e.pageY - (window.pageYOffset || document.documentElement.scrollTop)));
            if (!hasPointerEvents) {
                this.dragEl[0].style.visibility = 'visible';
            }
            if (this.pointEl.hasClass(opt.handleClass)) {
                this.pointEl = this.pointEl.parent(opt.itemNodeName);
            }
            if (this.pointEl.hasClass(opt.emptyClass)) {
                isEmpty = true;
            }
            else if (!this.pointEl.length || !this.pointEl.hasClass(opt.itemClass)) {
                return;
            }

            // find parent list of item under cursor
            var pointElRoot = this.pointEl.closest('.' + opt.rootClass),
                isNewRoot   = this.dragRootEl.data('nestable-id') !== pointElRoot.data('nestable-id');

            /**
             * move vertical
             */
            if (!mouse.dirAx || isNewRoot || isEmpty) {
                // check if groups match if dragging over new root
                if (isNewRoot && opt.group !== pointElRoot.data('nestable-group')) {
                    return;
                }
                // check depth limit
                depth = this.dragDepth - 1 + this.pointEl.parents(opt.listNodeName).length;
                if (depth > opt.maxDepth) {
                    return;
                }
                var before = e.pageY < (this.pointEl.offset().top + this.pointEl.height() / 2);
                parent = this.placeEl.parent();
                // if empty create new list to replace empty placeholder
                if (isEmpty) {
                    list = $(document.createElement(opt.listNodeName)).addClass(opt.listClass);
                    list.append(this.placeEl);
                    this.pointEl.replaceWith(list);
                }
                else if (before) {
                    this.pointEl.before(this.placeEl);
                }
                else {
                    this.pointEl.after(this.placeEl);
                }
                if (!parent.children().length) {
                    this.unsetParent(parent.parent());
                }
                if (!this.dragRootEl.find(opt.itemNodeName).length) {
                    this.dragRootEl.append('<div class="' + opt.emptyClass + '"/>');
                }
                // parent root list has changed
                if (isNewRoot) {
                    this.dragRootEl = pointElRoot;
                    this.hasNewRoot = this.el[0] !== this.dragRootEl[0];
                }
            }
        }

    };

    $.fn.nestable = function(params)
    {
        var lists  = this,
            retval = this;

        lists.each(function()
        {
            var plugin = $(this).data("nestable");

            if (!plugin) {
                $(this).data("nestable", new Plugin(this, params));
                $(this).data("nestable-id", new Date().getTime());
            } else {
                if (typeof params === 'string' && typeof plugin[params] === 'function') {
                    retval = plugin[params]();
                }
            }
        });

        return retval || lists;
    };

})(window.jQuery || window.Zepto, window, document);