/**
 * @name: index
 * @author: Administrator
 * @date: 2022-07-11 10:31
 * @description：index
 * @update: 2022-07-11 10:31
 */

import Measure from "../index"

class MeasureDistance extends Measure {
  /**
   * @constructor
   * @param sdk 
   * @description 距离测量
   * */
  constructor(sdk, options = {}) {
    super(sdk, options)
    this.options.color = this.options.color || "#00ffff"
    this.start_id = ""
    this.end_id = ""
    this.polyline_id = ""
    this.clampPositions = []
  }

  async clampToGroundMeasure(meters, cb) {
    let positions = []
    this.ids.forEach((id, index) => {
      let p = this.viewer.entities.getById(id).position.getValue()
      positions.push(this.cartesian3Towgs84(p, this.viewer))
    })
    let res = this.chunkLine(positions, meters)
    let coordinates = []
    res.forEach((Feature, index) => {
      if (index === 0) {
        coordinates = [...Feature.geometry.coordinates]
      } else {
        coordinates.push(Feature.geometry.coordinates[1])
      }
    })
    let total = coordinates.length

    for (const item of coordinates) {
      const index = coordinates.indexOf(item);
      let r = await this.getHeight({lng: item[0], lat: item[1], alt: 0}, index, total,)
      cb(null, r)
    }
  }

  async computeDisByTowPoint(p1, p2) {
    let d = this.computeDistance([p1, p2])
    let meters = 10
    let createLabel = (distance) => {
      if(this._isDestroy) {
        return
      }
      let label = this.getLabel("贴地距离：" + Number(distance).toFixed(2) + "米")
      label.pixelOffset = new Cesium.Cartesian2(
        0, -(32)
      )
      this.ids.push(MeasureDistance.create_point(Cesium.Cartesian3.fromDegrees(p2.lng, p2.lat, p2.alt), {label: label}, this))
    }
    let start = async (meters) => {
      let res = this.chunkLine([p1, p2], meters)
      let coordinates = []
      res.forEach((Feature, index) => {
        if (index === 0) {
          coordinates = [...Feature.geometry.coordinates]
        } else {
          coordinates.push(Feature.geometry.coordinates[1])
        }
      })
      let arr = []
      for (const item of coordinates) {
        const index = coordinates.indexOf(item);
        let r = await this.sampleHeight({lng: item[0], lat: item[1], alt: 0}, index)
        arr.push(r)
      }
      let total_length = 0
      let l = arr.length - 1
      arr.forEach((item, index) => {
        if (index !== l) {
          let d1 = this.computeDistance([item.position, arr[index + 1].position])
          let d2 = Math.abs(item.position.alt - arr[index + 1].position.alt)
          let d3 = Math.sqrt(d1 * d1 + d2 * d2)
          total_length += d3
        }
      })
      createLabel(total_length)
    }


    //暂时固定取20个点
    if (d > 20) {//大于20m时，固定取20个点
      meters = d / 20
      await start(meters)
    } else if (d < 1) {
      //不计算
      createLabel(d)
    } else {//小于20m的时候
      meters = 1
      await start(meters)
    }

  }


  async sampleHeight(p1, index) {
    let p2 = await this.sampleHeightMostDetailed([p1])
    p1.alt = p2[0].height
    return {position: p1, index}
  }


  async getHeight(p1, index, total) {
    let p2 = await this.sampleHeightMostDetailed([p1])
    p1.alt = p2[0].height
    this.clampPositions.push({position: p1, index})
    if (total === this.clampPositions.length) {
      let total_length = this.startCompute()
      return {total, current: this.clampPositions.length, total_length}
    }
    return {total, current: this.clampPositions.length,}
  }

  startCompute() {
    this.clampPositions.sort(function (a, b) {
      return a.index < b.index
    })
    let total_length = 0
    let l = this.clampPositions.length - 1
    this.clampPositions.forEach((item, index) => {
      if (index !== l) {
        let d1 = this.computeDistance([item.position, this.clampPositions[index + 1].position])
        let d2 = Math.abs(item.position.alt - this.clampPositions[index + 1].position.alt)
        let d3 = Math.sqrt(d1 * d1 + d2 * d2)
        total_length += d3
      }
    })
    return Number(total_length.toFixed(2))
  }


  static createPolyline(that) {
    let id = that.randomString()
    that.viewer.entities.add(new Cesium.Entity({
      id,
      polyline: {
        positions: new Cesium.CallbackProperty(() => {
          return that.positions
        }, false),
        clampToGround: true,
        width: 3,
        material: new Cesium.PolylineDashMaterialProperty({
          color: new Cesium.Color.fromCssColorString(that.options.color || that.defaultColor),
          dashLength: 20, //短划线长度
        }),
        zIndex: 99999999
      }
    }))
    return id
  }

  static create_point(cartesian, {
    label, image = "point.png",
    width,
    height
  }, that) {
    let id = that.randomString()
    let p = that.cartesian3Towgs84(cartesian, that.viewer)
    if (label) {
      label.pixelOffset = new Cesium.Cartesian2(
        0, -(height || 32)
      )
    }
    that.viewer.entities.add(
      new Cesium.Entity({
        id: id,
        label,
        position: Cesium.Cartesian3.fromDegrees(p.lng, p.lat, p.alt),
        billboard: {
          image: that.getSourceRootPath() + '/img/' + image,
          verticalOrigin: Cesium.VerticalOrigin.BOTTOM,
          disableDepthTestDistance: Number.POSITIVE_INFINITY,
          width,
          height
        }
      })
    )
    return id
  }

  getLabel(text) {
    return {
      text: text || '',
      //标注文字描述
      font: '20px Microsoft YaHei',
      fillColor: Cesium.Color.fromCssColorString('#f1e605'),
      style: Cesium.LabelStyle.FILL_AND_OUTLINE,
      //标注的遮挡距离设置为100则视角与标注的距离大于100米时会有遮挡
      // distanceDisplayCondition: this.distanceDisplayCondition,
      scale: 1,
      horizontalOrigin: Cesium.HorizontalOrigin.CENTER,
      verticalOrigin: Cesium.VerticalOrigin.BOTTOM,
      disableDepthTestDistance: Number.POSITIVE_INFINITY,

      // disableDepthTestDistance: this.disableDepthTestDistance,
    }
  }

  /**
   * 开始测量
   */
  start() {
    if (!YJ.Measure.GetMeasureStatus()) {
      super.start()
      this.positions = []
      this.cachePositions = []


      let leftEvent = async (movement, car) => {
        if (this.ids.length === 0) {
          this.polyline_id = (MeasureDistance.createPolyline(this))
          this.start_id = MeasureDistance.create_point(car, {
            image: "start1.png", width: 30, height: 38, label: this.getLabel("")
          }, this)
          //创建起点
        }

        this.tip.setPosition(car, movement.position.x, movement.position.y)
        this.positions = this.cachePositions.concat(car)

        if (this.ids.length !== 0) {
          let cur_point = this.cartesian3Towgs84(car, this.viewer)
          let pre_p = this.cartesian3Towgs84(this.cachePositions[this.cachePositions.length - 1], this.viewer)
          this.cachePositions.push(car)
          await this.computeDisByTowPoint(pre_p, cur_point)
        } else {
          this.cachePositions.push(car)
          this.ids.push(MeasureDistance.create_point(car, {}, this))
          let startPoint = this.viewer.entities.getById(this.ids[0])
          if(startPoint) {
            startPoint.billboard.show = false
          }
        }
      }
      let rightEvent = (movement, car) => {
        if (this.cachePositions.length) {
          this.positions = this.cachePositions
          this.end_id = MeasureDistance.create_point(this.cachePositions[this.cachePositions.length - 1], {
            image: "end1.png",
            width: 30,
            height: 38,
          }, this)
          let endPoint = this.viewer.entities.getById(this.ids[this.ids.length-1])
          if(endPoint) {
            endPoint.billboard.show = false
          }
        }
        if (this.cachePositions.length < 2) {
          this.destroy()
          YJ.Measure.Measures.pop()//弹出测量实体
        }
        this.end()
      }
      this.event.mouse_left(leftEvent)
      this.event.mouse_move((movement, car) => {
        this.tip.setPosition(car, movement.endPosition.x, movement.endPosition.y)
        this.positions = this.cachePositions.concat(car)
        // if (this.cachePositions.length) {
        //   let cur_point = this.cartesian3Towgs84(car, this.viewer)
        //   let pre_p = this.cartesian3Towgs84(this.cachePositions[this.cachePositions.length - 1], this.viewer)
        //   let cur_len = this.computeDistance([cur_point, pre_p])
        //   let text = "当前投影距离：" + cur_len + " 米"
        //   // this.tip.set_text(text)
        // }
      })
      this.event.mouse_right(rightEvent)

      this.event.gesture_pinck_start((movement, cartesian) => {
        let startTime = new Date()
        let pos = {
          position: {
            x: (movement.position1.x + movement.position2.x) / 2,
            y: (movement.position1.y + movement.position2.y) / 2
          }
        }
        this.event.gesture_pinck_end(() => {
          let endTime = new Date()
          if (endTime - startTime >= 500) {
            // 长按取消
            rightEvent(pos, cartesian)
          }
          else {
            leftEvent(pos, cartesian)
          }
        })
      })
    }
  }

  /**
   * 清除测量
   */
  destroy() {
    [this.polyline_id, this.end_id, this.start_id, ...this.ids].forEach(id => {
      this.remove_entity(id)
    })
    super.destroy()
  }


  /**
   * 结束测量
   */
  end() {
    // YJ.Measure.SetMeasureStatus(false)
    // this.tip.destroy()
    // this.event.destroy()
    super.end()
    // this.setPickStatus(this.pickStatus.pick)

  }
}

export default MeasureDistance