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
let arrData

// 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: 24.688611, lng: 119.260277, alt: 1673759, heading: 348, pitch: -69 }
  }
}

/**
 * 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

  // 创建矢量数据图层
  graphicLayer = new mars3d.layer.GraphicLayer({
    // 点的聚合配置
    clustering: {
      enabled: true,
      pixelRange: 20
      // opacity: 1,
      // getImage: function (count) {   //getImage是完全自定义方式
      //   let colorIn
      //   if (count < 10) {
      //     colorIn = 'rgba(110, 204, 57, 0.6)'
      //   } else if (count < 100) {
      //     colorIn = 'rgba(240, 194, 12,  0.6)'
      //   } else {
      //     colorIn = 'rgba(241, 128, 23,  0.6)'
      //   }
      //   return mars3d.Util.getCircleImage(count, {
      //     color: colorIn,
      //     radius: 30,
      //   })
      // },
    }
    // tooltip: '{text}',
  })
  map.addLayer(graphicLayer)

  // 访问后端接口，取数据
  mars3d.Util.fetchJson({ url: "//data.mars3d.cn/file/apidemo/mudi.json" })
    .then(function (res) {
      arrData = res.data
      addFeature(graphicLayer, arrData)
    })
    .catch(function (error) {
      console.log("加载JSON出错", error)
    })
}

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

  graphicLayer.remove()
  graphicLayer = null
}

function addFeature(graphicLayer, arr) {
  graphicLayer.bindPopup(function (event) {
    const item = event.graphic?.attr
    if (!item) {
      return false
    }
    const inthtml = `<table style="width: auto;">
                  <tr>
                    <th scope="col" colspan="2" style="text-align:center;font-size:15px;">${item.text} </th>
                  </tr>
                  <tr>
                    <td>省：</td><td>${item.province}</td>
                  </tr>
                  <tr>
                    <td>市：</td> <td>${item.city}</td>
                  </tr>
                  <tr>
                    <td>县/区：</td> <td>${item.district}</td>
                  </tr>
                  <tr>
                    <td>地址：</td> <td>${item.address}</td>
                  </tr>
                  <tr>
                    <td>视频：</td> <td><video src='http://data.mars3d.cn/file/video/lukou.mp4' controls autoplay style="width: 300px;" ></video></td>
                  </tr>
                </table>`
    return inthtml
  })

  // 单击事件
  graphicLayer.on(mars3d.EventType.click, function (event) {
    console.log("你单击了", event)

    if (map.camera.positionCartographic.height > 90000) {
      const graphic = event.graphic
      // graphic.closePopup()
      if (graphic) {
        // 单击了具体的点对象
        const position = graphic.positionShow
        map.flyToPoint(position, {
          radius: 5000, // 距离目标点的距离
          duration: 4,
          complete: function (e) {
            // 飞行完成回调方法
            // graphic.openPopup()
          }
        })
      } else {
        // 单击了聚合的点
        const arrEntity = event.pickedObject.id
        map.flyTo(arrEntity)
      }
    }
  })

  for (let i = 0, len = arr.length; i < len; i++) {
    const item = arr[i]

    const graphic = new mars3d.graphic.BillboardEntity({
      position: new mars3d.LngLatPoint(item.lng, item.lat, item.z || 0),
      style: {
        image: "img/marker/mark3.png",
        horizontalOrigin: Cesium.HorizontalOrigin.CENTER,
        verticalOrigin: Cesium.VerticalOrigin.BOTTOM,
        scaleByDistance: new Cesium.NearFarScalar(1000, 0.7, 5000000, 0.3),
        label: {
          text: item.text,
          font_size: 19,
          color: Cesium.Color.AZURE,
          outline: true,
          outlineColor: Cesium.Color.BLACK,
          outlineWidth: 2,
          horizontalOrigin: Cesium.HorizontalOrigin.LEFT,
          verticalOrigin: Cesium.VerticalOrigin.BOTTOM,
          pixelOffset: new Cesium.Cartesian2(10, 0), // 偏移量
          distanceDisplayCondition: new Cesium.DistanceDisplayCondition(0.0, 80000)
        }
      },
      attr: item
    })

    graphicLayer.addGraphic(graphic)
  }
}

// 计算贴地高度示例代码，可以将获取到的高度更新到数据库内，后续不用重复计算。
export function getDataSurfaceHeight() {
  if (!arrData) {
    globalMsg("数据尚未加载成功！")
    return
  }

  const lonCol = "lng"
  const latCol = "lat"
  const heightCol = "z"

  const positions = []
  for (let i = 0, len = arrData.length; i < len; i++) {
    const item = arrData[i]

    // 所在经纬度坐标及海拔高度
    const longitude = Number(item[lonCol])
    const latitude = Number(item[latCol])
    const height = Number(item[heightCol] || 0)

    const position = Cesium.Cartesian3.fromDegrees(longitude, latitude, height)
    positions.push(position)
  }

  showLoading()

  mars3d.PolyUtil.computeSurfacePoints({
    map: map,
    positions: positions
  }).then((result) => {
    hideLoading()
    if (result.noHeight) {
      console.log("部分数据未获取到高度值，贴地高度计算存在误差")
    }

    for (let i = 0, len = arrData.length; i < len; i++) {
      const item = arrData[i]
      const point = mars3d.LngLatPoint.fromCartesian(result.positions[i])

      item[lonCol] = point.lng
      item[latCol] = point.lat
      item[heightCol] = point.alt // 得到计算的高度值
    }

    mars3d.Util.downloadFile("point.json", JSON.stringify({ data: arrData }))
  })
}

export function enabledAggressive(val) {
  graphicLayer.clustering = val
}