/**
 * Created by FDD on 2017年5月24日.
 * @desc 规则矩形
 * @Inherits ol.geom.Polygon
 */

import {RECTANGLE} from '../../Utils/PlotTypes'
class RectAngle extends (ol.geom.Polygon) {
 constructor (points, params) {
 super()
 ol.geom.Polygon.call(this, [])
 this.type = RECTANGLE
 this.fixPointCount = 2
 this.set('params', params)
 this.setPoints(points)
 this.isFill = ((params['isFill'] === false) ? params['isFill'] : true)
 }

 /**
 * 执行动作
 */
 generate () {
 if (this.points.length === 2) {
 let coordinates = []
 if (this.isFill) {
 let extent = ol.extent.boundingExtent(this.points)
 let polygon = ol.geom.Polygon.fromExtent(extent)
 coordinates = polygon.getCoordinates()
 } else {
 let start = this.points[0]
 let end = this.points[1]
 coordinates = [start, [start[0], end[1]], end, [end[0], start[1]], start]
 }
 this.setCoordinates(coordinates)
 }
 }

 /**
 * 设置地图对象
 * @param map
 */
 setMap (map) {
 if (map && map instanceof ol.Map) {
 this.map = map
 } else {
 throw new Error('传入的不是地图对象!')
 }
 }

 /**
 * 获取当前地图对象
 * @returns {ol.Map|*}
 */
 getMap () {
 return this.map
 }

 /**
 * 判断是否是Plot
 * @returns {boolean}
 */
 isPlot () {
 return true
 }

 /**
 * 设置坐标点
 * @param value
 */
 setPoints (value) {
 this.points = !value ? [] : value
 if (this.points.length >= 1) {
 this.generate()
 }
 }

 /**
 * 获取坐标点
 * @returns {Array.<T>}
 */
 getPoints () {
 return this.points.slice(0)
 }

 /**
 * 获取点数量
 * @returns {Number}
 */
 getPointCount () {
 return this.points.length
 }

 /**
 * 更新当前坐标
 * @param point
 * @param index
 */
 updatePoint (point, index) {
 if (index >= 0 && index < this.points.length) {
 this.points[index] = point
 this.generate()
 }
 }

 /**
 * 更新最后一个坐标
 * @param point
 */
 updateLastPoint (point) {
 this.updatePoint(point, this.points.length - 1)
 }

 /**
 * 结束绘制
 */
 finishDrawing () {
 }
}

export default RectAngle