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
export const kgUtil = window.kgUtil

// 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: 31.516143, lng: 117.282937, alt: 46242, heading: 2, pitch: -49 }
  }
}

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

/**
 * 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({
    hasEdit: true,
    isAutoEditing: true // 绘制完成后是否自动激活编辑
  })
  map.addLayer(graphicLayer)

  bindLayerEvent() // 对图层绑定相关事件
  bindLayerContextMenu() // 在图层绑定右键菜单,对所有加到这个图层的矢量数据都生效
}

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

// 绘制
export function drawPolygon(type) {
  graphicLayer.startDraw({
    type: type,
    edittype: "polygon",
    style: {
      color: "#ff0000",
      opacity: 0.6,
      outline: true,
      outlineWidth: 3,
      outlineColor: "#ffffff",
      clampToGround: true
    }
  })
}

// 绘制(带高度)
export function drawExtrudedPolygon(type) {
  graphicLayer.startDraw({
    type: type,
    edittype: "polygon",
    style: {
      color: "#ffd500",
      opacity: 0.4,
      diffHeight: 300
    }
  })
}

// 在图层级处理一些事物
function bindLayerEvent() {
  // 在layer上绑定监听事件
  graphicLayer.on(mars3d.EventType.click, function (event) {
    console.log("监听layer，单击了矢量对象", event)
  })
  /* graphicLayer.on(mars3d.EventType.mouseOver, function (event) {
    console.log("监听layer，鼠标移入了矢量对象", event)
  })
  graphicLayer.on(mars3d.EventType.mouseOut, function (event) {
    console.log("监听layer，鼠标移出了矢量对象", event)
  }) */

  // 数据编辑相关事件，用于属性弹窗的交互
  graphicLayer.on(mars3d.EventType.drawCreated, function (e) {
    if (graphicLayer.hasEdit) {
      eventTarget.fire("graphicEditor-start", e)
    }
  })
  graphicLayer.on(
    [mars3d.EventType.editStart, mars3d.EventType.editMovePoint, mars3d.EventType.editStyle, mars3d.EventType.editRemovePoint],
    function (e) {
      eventTarget.fire("graphicEditor-update", e)
    }
  )
  graphicLayer.on([mars3d.EventType.editStop, mars3d.EventType.removeGraphic], function (e) {
    eventTarget.fire("graphicEditor-stop", e)
  })
}

// 在图层绑定Popup弹窗
export function bindLayerPopup() {
  graphicLayer.bindPopup(function (event) {
    const attr = event.graphic.attr || {}
    attr["类型"] = event.graphic.type
    attr["来源"] = "我是layer上绑定的Popup"
    attr["备注"] = "我支持鼠标交互"

    return mars3d.Util.getTemplateHtml({ title: "矢量图层", template: "all", attr: attr })
  })
}

// 绑定右键菜单
export function bindLayerContextMenu() {
  graphicLayer.bindContextMenu([
    {
      text: "开始编辑对象",
      icon: "fa fa-edit",
      show: function (e) {
        const graphic = e.graphic
        if (!graphic || !graphic.startEditing) {
          return false
        }
        return !graphic.isEditing
      },
      callback: function (e) {
        const graphic = e.graphic
        if (!graphic) {
          return false
        }
        if (graphic) {
          graphicLayer.startEditing(graphic)
        }
      }
    },
    {
      text: "停止编辑对象",
      icon: "fa fa-edit",
      show: function (e) {
        const graphic = e.graphic
        if (!graphic) {
          return false
        }
        return graphic.isEditing
      },
      callback: function (e) {
        const graphic = e.graphic
        if (!graphic) {
          return false
        }
        if (graphic) {
          graphicLayer.stopEditing(graphic)
        }
      }
    },
    {
      text: "删除对象",
      icon: "fa fa-trash-o",
      show: (event) => {
        const graphic = event.graphic
        if (!graphic || graphic.isDestroy) {
          return false
        } else {
          return true
        }
      },
      callback: function (e) {
        const graphic = e.graphic
        if (!graphic) {
          return
        }
        const parent = graphic._parent // 右击是编辑点时
        graphicLayer.removeGraphic(graphic)
        if (parent) {
          graphicLayer.removeGraphic(parent)
        }
      }
    },

    {
      text: "计算周长",
      icon: "fa fa-medium",
      callback: function (e) {
        const graphic = e.graphic
        const strDis = mars3d.MeasureUtil.formatDistance(graphic.distance)
        globalAlert("该对象的周长为:" + strDis)
      }
    },
    {
      text: "计算面积",
      icon: "fa fa-reorder",
      callback: function (e) {
        const graphic = e.graphic
        const strArea = mars3d.MeasureUtil.formatArea(graphic.area)
        globalAlert("该对象的面积为:" + strArea)
      }
    }
  ])
}

export function updateLayerHasEdit(val) {
  graphicLayer.hasEdit = val
}

// 保存GeoJSON
export function downloadJsonFile() {
  const geojson = graphicLayer.toGeoJSON()
  mars3d.Util.downloadFile("我的标注.json", JSON.stringify(geojson))
}

/**
 * 打开geojson文件
 *
 * @export
 * @param {FileInfo} file 文件
 * @returns {void} 无
 */
export function openGeoJSON(file) {
  const fileName = file.name
  const fileType = fileName?.substring(fileName.lastIndexOf(".") + 1, fileName.length).toLowerCase()

  if (fileType === "json" || fileType === "geojson") {
    const reader = new FileReader()
    reader.readAsText(file, "UTF-8")
    reader.onloadend = function (e) {
      let geojson = this.result
      geojson = simplifyGeoJSON(geojson) // 简化geojson的点
      graphicLayer.loadGeoJSON(geojson, {
        flyTo: true
      })
    }
  } else if (fileType === "kml") {
    const reader = new FileReader()
    reader.readAsText(file, "UTF-8")
    reader.onloadend = function (e) {
      const strkml = this.result
      kgUtil.toGeoJSON(strkml).then((geojson) => {
        geojson = simplifyGeoJSON(geojson) // 简化geojson的点
        console.log("kml2geojson", geojson)

        graphicLayer.loadGeoJSON(geojson, {
          flyTo: true
        })
      })
    }
  } else if (fileType === "kmz") {
    // 加载input文件控件的二进制流
    kgUtil.toGeoJSON(file).then((geojson) => {
      geojson = simplifyGeoJSON(geojson) // 简化geojson的点
      console.log("kmz2geojson", geojson)

      graphicLayer.loadGeoJSON(geojson, {
        flyTo: true
      })
    })
  } else {
    globalMsg("暂不支持 " + fileType + " 文件类型的数据！")
  }
}



// 简化geojson的坐标
function simplifyGeoJSON(geojson) {
  try {
    geojson = turf.simplify(geojson, { tolerance: 0.000001, highQuality: true, mutate: true })
  } catch (e) {
    console.log("加载出错", e)
  }
  return geojson
}