import {Cartesian3, Entity, Color, Viewer, Cartesian2, HorizontalOrigin, VerticalOrigin, HeightReference} from "cesium";

/**
 文件描述：文本标注
 创建时间：2024/4/16 11:44
 创建人：Zhaipeixiu
 */
export type textLabelOptions = {
 showBackground?: boolean,  //显示背景
 backgroundColor?: Color, //背景色
 backgroundPadding?: any,   //padding值
 fillColor: Color,
 horizontalOrigin?: any, //水平对齐方式
 verticalOrigin?: any,   //竖直对齐方式
 outlineColor?: any,
 outlineWidth?: any
}

export class TextLabel{
 _viewer: Viewer|undefined = undefined
 _defaultStyle: textLabelOptions = {
  showBackground: true, //显示背景
  backgroundColor: Color.BLACK, //背景色
  backgroundPadding: new Cartesian2(10, 10), //padding值
  fillColor: Color.WHITE,
  outlineColor: Color.WHITESMOKE,
  outlineWidth: 1.0,
  horizontalOrigin: HorizontalOrigin.CENTER,//对齐方式
  verticalOrigin: VerticalOrigin.CENTER,
 }
 _cesiumLabel: Entity|undefined = undefined

 // 构造函数，新建label并显示
 constructor(viewer: Viewer, position: Cartesian3, text: string, options?: textLabelOptions) {
  this._viewer = viewer
  this._defaultStyle = {...this._defaultStyle, ...options}

  this._cesiumLabel = new Entity({
   position: position,
   name: 'default',
   label: {
    text: text,
    scale: .6,
    pixelOffset:  new Cartesian2(20, -20),
    showBackground: this._defaultStyle.showBackground, //显示背景
    backgroundColor: this._defaultStyle.backgroundColor, //背景色
    backgroundPadding: this._defaultStyle.backgroundPadding, //padding值
    fillColor: this._defaultStyle.fillColor,
    outlineColor: this._defaultStyle.outlineColor,
    outlineWidth: this._defaultStyle.outlineWidth,
    horizontalOrigin: this._defaultStyle.horizontalOrigin, //对齐方式
    verticalOrigin: this._defaultStyle.verticalOrigin,
    heightReference: HeightReference.CLAMP_TO_GROUND
   }
  })
  this._viewer.entities.add(this._cesiumLabel)
 }

 //移除label
 public remove(){
  if(this._cesiumLabel !== undefined && this._viewer!==null)
   this._viewer.entities.remove(this._cesiumLabel)
 }
}