var arrow = {
	isActivate: false,
	drawArr: [],
	handler: null,
	viewer: null,
	init: function(viewer) {
		if (!this.isActivate) {
			this.isActivate = true;
			this.viewer = viewer;
			this.bindEdit();
		}
	},
	disable: function() {
		if (this.isActivate) {
			this.isActivate = false;
			for (var i = 0; i < this.drawArr.length; i++) {
				this.drawArr[i].disable();
			}
			this.drawArr = [];
			if (this.handler) {
				this.handler.destroy();
				this.handler = null;
			}
			this.viewer = null;
		}
	},
	draw: function(type) {
		switch (type) {
			case "straightArrow":
				var straightArrow = new StraightArrow(viewer);
				straightArrow.startDraw();
				this.drawArr.push(straightArrow);
				break;
			case "attackArrow":
				var attackArrow = new AttackArrow(viewer);
				attackArrow.startDraw();
				this.drawArr.push(attackArrow);
				break;
			case "pincerArrow":
				var pincerArrow = new PincerArrow(viewer);
				pincerArrow.startDraw();
				this.drawArr.push(pincerArrow);
			default:
				break;
		}
	},
	saveData: function() { //保存用户数据
		var jsonData = {
			straightArrowData: [],
			attackArrowData: [],
			pincerArrowData: []
		}
		for (var step = 0; step < this.drawArr.length; step++) {
			var item = this.drawArr[step];
			var positions = item.getLnglats();
			if (item.type == "StraightArrow") {
				jsonData.straightArrowData.push(positions);
			} else if (item.type == "AttackArrow") {
				jsonData.attackArrowData.push(positions);
			} else {
				jsonData.pincerArrowData.push(positions);
			}
		}
		console.log("保存的数据：" + JSON.stringify(jsonData));
	},
	showData: function(jsonData) { //展示用户保存的数据
		if(!jsonData) return ;
		var straightArrowArr = jsonData.straightArrowData;
		var attackArrowArr = jsonData.attackArrowData;
		var pincerArrowArr = jsonData.pincerArrowData;
		//展示直线箭头
		for(var i=0;i<straightArrowArr.length;i++){
			var item = straightArrowArr[i];
			var straightArrow = new StraightArrow(viewer);
			straightArrow.createByData(item);
			this.drawArr.push(straightArrow);
		}
		//展示攻击箭头
		for(var j=0;j<attackArrowArr.length;j++){
			var item = attackArrowArr[j];
			var attackArrow = new AttackArrow(viewer);
			attackArrow.createByData(item);
			this.drawArr.push(attackArrow);
		}
		//展示钳击箭头
		for(var z=0;z<pincerArrowArr.length;z++){
			var item = pincerArrowArr[z];
			var pincerArrow = new PincerArrow(viewer);
			pincerArrow.createByData(item);
			this.drawArr.push(pincerArrow);
		}
		
	},
	nowArrowObj: null,
	bindEdit: function() {
		var $this = this;
		this.handler = new Cesium.ScreenSpaceEventHandler(this.viewer.scene.canvas);
		this.handler.setInputAction(function(evt) { //单机开始绘制
			var pick = $this.viewer.scene.pick(evt.position);
			if (Cesium.defined(pick) && pick.id) {
				if ($this.nowArrowObj) {
					if ($this.nowArrowObj.state != -1) {
						console.log("上一步操作未结束，请继续完成上一步！");
						return;
					}
				}
				for (var i = 0; i < $this.drawArr.length; i++) {
					if (pick.id.objId == $this.drawArr[i].objId) {
						$this.nowArrowObj = $this.drawArr[i];
						$this.drawArr[i].startModify();
						break;
					}
				}
			}
		}, Cesium.ScreenSpaceEventType.LEFT_CLICK);
	},
	clearOne: function() {
		var $this = this;
		this.handler.setInputAction(function(evt) { //单机开始绘制
			var pick = viewer.scene.pick(evt.position);
			if (Cesium.defined(pick) && pick.id) {
				for (var i = 0; i < $this.drawArr.length; i++) {
					if (pick.id.objId == $this.drawArr[i].objId) {
						$this.drawArr[i].clear();
						$this.drawArr.splice(i, 1);
						break;
					}
				}
				$this.handler.destroy();
				$this.bindEdit();
			}
		}, Cesium.ScreenSpaceEventType.LEFT_CLICK);
	},
	clearAll:function(){
		for (var i = 0; i < this.drawArr.length; i++) {
			this.drawArr[i].clear();
		}
	}
}