import * as Cesium from 'cesium';
import data2 from '@/assets/images/home/homeRight/data2.png';
import data1 from '@/assets/images/home/homeRight/data1.png';
import jiangxishi from '@/assets/geojson/jiangxishi.json';
import jiangxi from '@/assets/geojson/jiangxi.json';
import zg from '@/assets/geojson/zg.json';
import MapPopUpBox from '@/views/Home/MapPopUpBox.vue';
import { render } from 'vue';

/**
 * 机巢聚合功能
 */
export const useAggregation = () => {
  const scalingJudgment = [
    { name: '县', value: [0, 48651], gJson: null },
    { name: '市', value: [48651, 314863], gJson: jiangxishi },
    { name: '省', value: [314863, 1169651], gJson: jiangxi },
    { name: '国', value: [1169651, 37962800], gJson: zg },
  ];
  let viewer = null;
  const active = ref('');
  let handler = null;
  let labelDiv = null;
  let positionC3 = null;
  const init = () => {
    determineScaling();
    viewer.camera.moveEnd.addEventListener(() => {
      determineScaling();
    });
  };

  // 确定缩放比例
  const determineScaling = () => {
    let height = viewer.camera.positionCartographic.height;
    // 根据高度展示对应的 gJson
    for (let item of scalingJudgment) {
      if (height > item.value[0] && height <= item.value[1]) {
        if (active.value !== item.name) {
          removeEntities();
          removeLabel();
          active.value = item.name;
          item.gJson ? aggregation(item) : splashed();
        }
        break;
      }
    }
  };

  //散点机巢
  function splashed() {
    for (let i = 0; i < 50; i++) {
      viewer.entities.add({
        position: Cesium.Cartesian3.fromDegrees(
          115.89 + Math.random() * 0.2,
          28.68 + Math.random() * 0.2
        ),
        label: {
          // 随机整数
          text: Math.floor(Math.random() * 100) + '号机巢',
          font: '14pt monospace',
          fillColor: Cesium.Color.WHITE,
          outlineColor: Cesium.Color.BLACK,
          outlineWidth: 2,
          style: Cesium.LabelStyle.FILL_AND_OUTLINE,
          verticalOrigin: Cesium.VerticalOrigin.BOTTOM,
          pixelOffset: new Cesium.Cartesian2(0, -9),
        },
        billboard: {
          image: new Cesium.ConstantProperty(data1),
          width: 24,
          height: 24,
        },
      });
    }
  }

  // 聚合机巢
  const aggregation = item => {
    const featuresList = item.gJson.features.map(item => ({
      name: item.properties.name,
      position: item.properties.center,
    }));
    // 遍历特征并添加实体
    featuresList.forEach(feature => {
      if (!feature.position) return;
      const position = Cesium.Cartesian3.fromDegrees(feature.position[0], feature.position[1]);
      viewer.entities.add({
        id: feature.id,
        position: position,
        label: {
          // 随机整数
          text: feature.name + Math.floor(Math.random() * 100),
          font: '14pt monospace',
          fillColor: Cesium.Color.WHITE,
          outlineColor: Cesium.Color.BLACK,
          outlineWidth: 2,
          style: Cesium.LabelStyle.FILL_AND_OUTLINE,
          verticalOrigin: Cesium.VerticalOrigin.BOTTOM,
          pixelOffset: new Cesium.Cartesian2(0, -9),
        },
        billboard: {
          image: new Cesium.ConstantProperty(data2),
          width: 24,
          height: 24,
        },
        properties: {
          id: feature.id,
          customData: {
            name: feature.name,
          },
        },
      });
    });
    // 加载新的 GeoJSON 数据
    Cesium.GeoJsonDataSource.load(item.gJson).then(dataSource => {
      viewer.dataSources.add(dataSource);
      item.dataSource = dataSource; // 保存数据源以便后续删除
      // 获取数据源中的实体
      const entities = dataSource.entities.values;
      entities.forEach(entity => {
        entity.polygon.material = new Cesium.ColorMaterialProperty(
          Cesium.Color.YELLOW.withAlpha(0) // 透明填充
        );
        entity.polygon.outline = new Cesium.ConstantProperty(true); // 显示边框
        entity.polygon.outlineColor = new Cesium.ConstantProperty(Cesium.Color.YELLOW); // 黑色边框
      });
    });
  };

  const getLabelDom = () => {
    const vNode = h(MapPopUpBox, { data: '参数',removeLabel });
    const tooltipContainer = document.createElement('div');
    tooltipContainer.style.position = 'absolute';
    tooltipContainer.style.transform = 'translateY(-50%)';
    tooltipContainer.style.pointerEvents = 'none';
    document.querySelector('.page-index').append(tooltipContainer);
    render(vNode, tooltipContainer);
    return tooltipContainer;
  };

  const labelBox = () => {
    if (!labelDiv) {
      labelDiv = getLabelDom();
    }
    const screenPosition = viewer.scene.cartesianToCanvasCoordinates(positionC3);
    if (screenPosition) {
      labelDiv.style.left = `${screenPosition.x}px`;
      labelDiv.style.top = `${screenPosition.y}px`;
    }
  };

  const clickFun = click => {
    const pickedObject = viewer.scene.pick(click.position);
    if (Cesium.defined(pickedObject) && pickedObject.id) {
      const entity = pickedObject.id;
      positionC3 = entity.position._value;
      viewer.scene.postRender.addEventListener(labelBox);
    }
  };

  const removeEntities = () => {
    viewer.dataSources.removeAll(true);
    viewer.entities.removeAll();
  };
  const removeLabel = () => {
    viewer.scene.postRender.removeEventListener(labelBox);
    if (labelDiv && labelDiv.parentNode) {
      labelDiv.parentNode.removeChild(labelDiv);
      labelDiv = null;
    }
  };

  onUnmounted(() => {
    removeEntities();
    removeLabel();
    handler?.removeInputAction(Cesium.ScreenSpaceEventType.LEFT_CLICK);
  });

  onMounted(() => {
    nextTick(() => {
      viewer = window.$viewer;
      handler = new Cesium.ScreenSpaceEventHandler(viewer.scene.canvas);
      handler.setInputAction(clickFun, Cesium.ScreenSpaceEventType.LEFT_CLICK);
      init();
    });
  });
};