import * as mars3d from "mars3d"

export let map // mars3d.Map三维地图对象
export let graphicLayer // 矢量图层对象

// 需要覆盖config.json中地图属性参数（当前示例框架中自动处理合并）
export const mapOptions = {
  scene: {
    center: {
      lat: 31.799613,
      lng: 117.27357,
      alt: 72.55,
      heading: 59.8,
      pitch: -18,
      roll: 0
    }
  },
  control: {
    clockAnimate: true, // 时钟动画控制(左下角)
    timeline: true, // 是否显示时间线控件
    compass: { bottom: "380px", left: "5px" }
  }
}

export const eventTarget = new mars3d.BaseClass() // 事件对象，用于抛出事件到面板中

// 时间控制参数
const args = {
  space: 100,
  time: 5,
  martTimeInter: null,
  cleanTimeInter: null
}

/**
 * 初始化地图业务，生命周期钩子函数（必须）
 * 框架在地图初始化完成后自动调用该函数
 * @param {mars3d.Map} mapInstance 地图对象
 * @returns {void} 无
 */
export function onMounted(mapInstance) {
  map = mapInstance // 记录map
  map.toolbar.style.bottom = "55px" // 修改toolbar控件的样式

  addLayer()
}

/**
 * 释放当前地图业务的生命周期函数
 * @returns {void} 无
 */
export function onUnmounted() {
  map = null
}

function addLayer() {
  // 创建Graphic图层
  graphicLayer = new mars3d.layer.GraphicLayer()
  map.addLayer(graphicLayer)

  // 合肥高铁
  const coors = [
    [117.277697, 31.800233, 45],
    [117.262022, 31.798983, 45],
    [117.229506, 31.793351, 45],
    [117.215719, 31.791085, 45],
    [117.207234, 31.79079, 45],
    [117.180246, 31.790688, 45],
    [117.168311, 31.789785, 45],
    [117.152322, 31.789855, 45],
    [117.125297, 31.788849, 45],
    [117.091144, 31.787516, 45]
  ]

  const positions = mars3d.PointTrans.lonlats2cartesians(coors)

  // 插值求新路线（按固定间隔米数插值） positions输入的值需为笛卡尔空间xyz坐标数组
  const positionsNew = mars3d.PolyUtil.interLine(positions, {
    minDistance: 20 // 间隔20米
  })

  // 求对比的贴地地面高度（用于echarts展示）
  mars3d.PolyUtil.computeSurfacePoints({
    scene: map.scene,
    positions: positionsNew // 需要计算的源路线坐标数组
  }).then((result) => {
    // raisedPositions为含高程信息的新坐标数组，noHeight为标识是否存在无地形数据。
    console.log("含高程信息的新坐标数组", result.positions)

    inintRoad(positionsNew, result.positions)
  })
}

// 构造动态高铁   positions:设计的路线    positionsTD地面的贴地路线（用于比较）
function inintRoad(positionsSJ, positionsTD) {
  const heightArray = []
  const heightTDArray = []
  const mpoints = []
  for (let i = 0; i < positionsSJ.length; i++) {
    const position = positionsSJ[i]
    const carto = Cesium.Cartographic.fromCartesian(position)
    const x = Cesium.Math.toDegrees(carto.longitude)
    const y = Cesium.Math.toDegrees(carto.latitude)

    const height = mars3d.Util.formatNum(carto.height) // 设计高度  当小数点后面的数字一致时，会省略小数点，不显示
    const tdHeight = mars3d.Util.formatNum(Cesium.Cartographic.fromCartesian(positionsTD[i]).height) // 地面高度

    heightArray.push(height)
    heightTDArray.push(tdHeight)
    mpoints.push([x, y, height, tdHeight])
  }

  //  距离数组
  const positionsLineFirst = positionsTD[0]
  const distanceArray = positionsTD.map(function (data) {
    return Math.round(Cesium.Cartesian3.distance(data, positionsLineFirst)) // 计算两点之间的距离,返回距离
  })

  // 显示echarts
  eventTarget.fire("dataLoaded", { heightArray, heightTDArray, distanceArray })
  //  画线
  const primitive = new mars3d.graphic.PolylinePrimitive({
    id: "设计路线",
    positions: positionsSJ,
    style: {
      width: 3,
      color: Cesium.Color.RED,
      materialType: mars3d.MaterialType.PolylineDash, // 虚线
      dashLength: 20
    }
  })
  graphicLayer.addGraphic(primitive)

  const primitiveTD = new mars3d.graphic.PolylinePrimitive({
    id: "贴地路线",
    positions: positionsTD,
    style: {
      width: 3,
      color: Cesium.Color.YELLOW
    }
  })
  graphicLayer.addGraphic(primitiveTD)

  // =================计算路线====================
  const start = map.clock.currentTime.clone()

  const counts = mpoints.length

  const arrProperty = []

  // 16组车身+头尾2个车头 共18组
  for (let j = 0; j < 18; j++) {
    const stime = Cesium.JulianDate.addSeconds(start, j, new Cesium.JulianDate()) // 每隔j秒，添加一次时间

    const property = new Cesium.SampledPositionProperty()

    for (let i = 0; i < counts; i++) {
      const time = Cesium.JulianDate.addSeconds(stime, i + 1, new Cesium.JulianDate())
      const point = Cesium.Cartesian3.fromDegrees(mpoints[i][0], mpoints[i][1], mpoints[i][2] + 0.5)
      property.addSample(time, point) // 添加新样本，时间、位置
    }

    property.setInterpolationOptions({
      interpolationDegree: 1,
      interpolationAlgorithm: Cesium.LinearApproximation
    })

    arrProperty.push(property)
  }

  // =================时间相关====================

  const stop = Cesium.JulianDate.addSeconds(start, counts + 60, new Cesium.JulianDate())
  map.clock.startTime = start.clone()
  map.clock.stopTime = stop.clone()
  map.clock.currentTime = start.clone()
  map.clock.multiplier = 1 // 当前速度，默认为1
  map.clock.shouldAnimate = true // 是否开启时钟动画，默认true
  //  map.clock.clockRange = Cesium.ClockRange.LOOP_STOP; // 到达终止时间后循环

  if (map.controls.timeline) {
    map.controls.timeline.zoomTo(start, stop)
  }

  const availability = new Cesium.TimeIntervalCollection([
    new Cesium.TimeInterval({
      start: start,
      stop: Cesium.JulianDate.addSeconds(start, counts, new Cesium.JulianDate())
    })
  ])

  // =================添加高铁车头================
  const graphicHead = addTrainHead(arrProperty[0], availability)
  map.trackedEntity = graphicHead.entity // 设置相机的视角跟随的Entity实例

  // =================添加车身====================
  const len = arrProperty.length
  for (let j = 1; j < len - 1; j++) {
    addTrainBody(arrProperty[j], availability)
  }

  // =================添加高铁车尾================
  addTrainHead(arrProperty[len - 1], availability, true) // 车尾部的反向车头

  // ==============添加铁路，定时更新================
  addRailway(graphicHead, mpoints)

  // ==============更新echarts================
  let lastDistance

  function locTrain() {
    const t = parseInt(map.clock.currentTime.secondsOfDay - map.clock.startTime.secondsOfDay) // 时间差

    if (t >= heightArray.length) {
      // 高铁运行结束之后
      clearInterval(args.martTimeInter)
      clearInterval(args.cleanTimeInter)
      return
    }
    if (lastDistance === t) {
      return
    }
    lastDistance = t
    updateEchartsDistance(t, heightArray[t])
  }
  args.martTimeInter = setInterval(locTrain, 100)
}

// 添加车头
function addTrainHead(position, availability, rotatePI) {
  const graphicModel = new mars3d.graphic.ModelEntity({
    name: "和谐号车头",
    position: position,
    orientation: new Cesium.VelocityOrientationProperty(position),
    availability: availability,
    style: {
      url: "//data.mars3d.cn/gltf/mars/train/heada.glb",
      scale: 0.001,
      minimumPixelSize: 16,
      heading: rotatePI ? 90 : -90
    }
  })
  graphicLayer.addGraphic(graphicModel)
  return graphicModel
}

// 添加车身
function addTrainBody(position, availability) {
  const graphicModel = new mars3d.graphic.ModelEntity({
    name: "和谐号车身",
    position: position,
    orientation: new Cesium.VelocityOrientationProperty(position),
    availability: availability,
    style: {
      url: "//data.mars3d.cn/gltf/mars/train/body.glb",
      scale: 0.001,
      minimumPixelSize: 16,
      heading: -90
    }
  })
  graphicLayer.addGraphic(graphicModel)
  return graphicModel
}

// 添加铁路，定时更新
function addRailway(graphicHead, mpoints) {
  const positions = []
  const orientations = []

  const times = graphicHead.position._property._times
  const start = times[0].clone()
  const counts = times.length

  for (let k = 1; k < counts; k++) {
    const time = times[k]

    const position = graphicHead.position.getValue(time)
    positions.push(position)

    const orientation = graphicHead.orientation.getValue(time)
    orientations.push(orientation)
  }

  let i = 0
  const roadNum = 80

  function addroad() {
    const space = Math.round(map.clock.currentTime.secondsOfDay - map.clock.startTime.secondsOfDay)
    let spa = space + args.space
    if (spa > counts) {
      spa = counts
    }
    for (; i < spa; i++) {
      const availability = new Cesium.TimeIntervalCollection([
        new Cesium.TimeInterval({
          start: Cesium.JulianDate.addSeconds(start, -roadNum + i, new Cesium.JulianDate()),
          stop: Cesium.JulianDate.addSeconds(start, roadNum + i, new Cesium.JulianDate())
        })
      ])

      //  当高度在地下时，添加地下隧道
      if (mpoints[i][2] - mpoints[i][3] < -20 || (i > 2 && mpoints[i - 3][2] - mpoints[i - 3][3] < -20)) {
        //  mpoints[i][2] -- 设计高度；mpoints[i][3] -- 贴地高度
        const id = "s" + i
        const graphic = graphicLayer.getGraphicById(id)
        if (!graphic) {
          const graphicModel = new mars3d.graphic.ModelEntity({
            id: id,
            position: positions[i],
            orientation: orientations[i],
            availability: availability,
            style: {
              url: "//data.mars3d.cn/gltf/mars/railway/suidao.glb",
              scale: 0.001
            }
          })
          graphicLayer.addGraphic(graphicModel)
        } else {
          graphic.entity.availability._intervals[0].stop.secondsOfDay = availability._intervals[0].stop.secondsOfDay
        }
      }

      //  添加轨道地面
      const id = "xl" + i
      const graphic = graphicLayer.getGraphicById(id)
      if (!graphic) {
        const graphicModel = new mars3d.graphic.ModelEntity({
          id: id,
          position: positions[i],
          orientation: orientations[i],
          availability: availability,
          style: {
            url: "//data.mars3d.cn/gltf/mars/railway/railway.glb",
            scale: 0.001
          }
        })
        graphicLayer.addGraphic(graphicModel)
      } else {
        graphic.entity.availability._intervals[0].stop.secondsOfDay = availability._intervals[0].stop.secondsOfDay
      }

      // 添加轨道支架
      if (mpoints[i][2] - mpoints[i][3] > 20 && i % 5 === 0) {
        const id = "xq" + i
        const graphic = graphicLayer.getGraphicById(id)
        if (!graphic) {
          const graphicModel = new mars3d.graphic.ModelEntity({
            id: id,
            position: positions[i],
            orientation: orientations[i],
            availability: availability,
            style: {
              url: "//data.mars3d.cn/gltf/mars/railway/bridge.glb",
              scale: 0.001
            }
          })
          graphicLayer.addGraphic(graphicModel)
        } else {
          graphic.entity.availability._intervals[0].stop.secondsOfDay = availability._intervals[0].stop.secondsOfDay
        }
      }

      // 添加轨道边的柱子
      if (i % 12 === 0) {
        const id = "xd" + i
        const graphic = graphicLayer.getGraphicById(id)
        if (!graphic) {
          const graphicModel = new mars3d.graphic.ModelEntity({
            id: id,
            position: positions[i],
            orientation: orientations[i],
            availability: availability,
            style: {
              url: "//data.mars3d.cn/gltf/mars/railway/jiazi.glb",
              scale: 0.001
            }
          })
          graphicLayer.addGraphic(graphicModel)
        } else {
          graphic.entity.availability._intervals[0].stop.secondsOfDay = availability._intervals[0].stop.secondsOfDay
        }
      }
    }

    // 移除铁路
    for (let j = args.statate; j < args.statate - args.space; j++) {
      removeGraphic("s" + j)
      removeGraphic("xl" + j)
      removeGraphic("xq" + j)
      removeGraphic("xd" + j)
      args.statate = j
    }
  }

  addroad()

  args.cleanTimeInter = setInterval(addroad, args.time)
  args.statate = 0
}

function removeGraphic(id) {
  const graphic = graphicLayer.getGraphicById(id)
  if (graphic) {
    if (graphic.entity.availability._intervals[0].stop.secondsOfDay < map.clock.currentTime.secondsOfDay) {
      graphic.remove(true)
    }
  }
}

function updateEchartsDistance(loc, height) {
  eventTarget.fire("dataUpdated", { loc, height })
}