import {
 Tangram
} from "./Tangram";
import {
 Point2D
} from "./Point2D";

/**
 * 线几何对象
 * @class Zondy.Object.PolyLine
 * @classdesc 线几何对象
 * @extends Zondy.Object.Tangram
 * @param {Array} [pointArr = new Array()] 一组点几何对象 Array<{@link Zondy.Object.Point2D}>
 * @param {Object} option 属性键值对
 * @param {Number} [option.nearDis = null] 线搜素半径,只在做线查询时需赋值
 */
class PolyLine extends Tangram {
 /// <summary>线几何对象构造函数</summary>
 /// <param name="pointArr" type="Array,Zondy.Object.Point2D in an Array">
 /// 一组点几何对象
 /// </param>
 constructor(pointArr, option) {
 var options = option ? option : {};
 super(options);

 /**
 * @member Zondy.Object.PolyLine.prototype.nearDis
 * @type {Number}
 * @description 线搜素半径double,只在做线查询时需赋值
 * @default null
 */
 this.nearDis = (options.nearDis !== undefined && options.nearDis !== null) ? parseFloat(options.nearDis) : null;

 /**
 * @member Zondy.Object.PolyLine.prototype.pointArr
 * @type {Array}
 * @description 一组点几何对象 Array<{@link Zondy.Object.Point2D}>
 * @default new Array()
 */
 this.pointArr = ((pointArr !== undefined && pointArr !== null) && Array.isArray(pointArr)) ? pointArr : new Array();
 }

 /**
 * @function Zondy.Object.PolyLine.prototype.setByOL
 * @description 通过传入Openlayers的ol.geom.LineString类型来设置参数
 * @param {ol.geom.LineString} openlayersLine Openlayers定义的折线对象
 */
 setByOL(openlayersLine) {
 if (openlayersLine !== undefined && openlayersLine !== null) {
 var dotArr = openlayersLine.getCoordinates();
 var len = dotArr.length;
 for (var i = 0; i < len; i++) {
 this.pointArr[i] = new Point2D(dotArr[i][0], dotArr[i][1]);
 }
 }
 }

 /**
 * @function Zondy.Object.PolyLine.prototype.toString
 * @description 对象转化为字符串
 * @returns {String} 返回一个字符串来表示该折线
 */
 toString() {
 if (this.pointArr === null || this.pointArr.length === 0)
 return "";
 var str = this.pointArr[0].x + ',' + this.pointArr[0].y;
 for (var i = 1; i < this.pointArr.length; i++) {
 str += "," + this.pointArr[i].x + ',' + this.pointArr[i].y;
 }
 if (this.nearDis !== undefined && this.nearDis !== null) {

 str += ";" + this.nearDis;
 }
 return this.Trim(str, "g");
 }

 /**
 * @function Zondy.Object.PolyLine.prototype.getGeometryType
 * @description 获取几何类型名称
 * @returns {String} line
 */
 getGeometryType() {
 return "line";
 }
}
export {
 PolyLine
};
Zondy.Object.PolyLine = PolyLine;