<template>
  <div id="cesiumContainer" style="width: 100%; height: 100%;"></div>
  
  <!-- POI详情弹窗 -->
  <div v-if="showPopup" class="poi-popup" :style="popupStyle">
    <div class="popup-header">
      <span class="popup-title">{{ poiData.name }} <a href="#" class="popup-detail" @click.prevent="goToTwinStation">详情</a></span>
      <button class="popup-close" @click="closePopup">×</button>
    </div>
    <div class="popup-content">
      <div class="popup-section">
        <div class="popup-label">实时数据</div>
        <div class="popup-value">水位: {{ poiData.waterLevel }}m</div>
        <div class="popup-value">流量: {{ poiData.flow }}m³/s</div>
        <div class="popup-value">降雨量: {{ poiData.rainfall }}mm/h</div>
      </div>
      <div class="popup-section">
        <div class="popup-label">历史同期值</div>
        <div class="popup-value">水位: {{ poiData.historyWaterLevel }}m</div>
        <div class="popup-value">流量: {{ poiData.historyFlow }}m³/s</div>
      </div>
    </div>
  </div>
</template>

<script setup>
import { ref, onMounted, onUnmounted, computed } from 'vue'
import * as Cesium from 'cesium'
import 'cesium/Build/CesiumUnminified/Widgets/widgets.css'
import { useRouter } from 'vue-router'

const emit = defineEmits(['toggleMap'])

const viewer = ref(null)
const showPopup = ref(false)
const popupPosition = ref({ x: 0, y: 0 })

const router = useRouter()

const poiData = ref({
  name: '黑林水文站',
  waterLevel: '3.25',
  flow: '12.5',
  rainfall: '0.5',
  historyWaterLevel: '3.10',
  historyFlow: '11.8',
  device: 'HL-Sensor-001'
})

const popupStyle = computed(() => {
  return {
    left: popupPosition.value.x + 'px',
    top: popupPosition.value.y + 'px'
  }
})

let blinkInterval = null

const addPoiMarker = () => {
    // 添加黑林水文站POI
    const heilinPosition = Cesium.Cartesian3.fromDegrees(118.8770798, 35.0320627)
    
    // 创建一个不可见的点实体，用于扩大点击区域
    const clickEntity = viewer.value.entities.add({
      id: 'heilin-station-click',
      position: heilinPosition,
      point: {
        pixelSize: 30,
        color: Cesium.Color.TRANSPARENT,
        outlineColor: Cesium.Color.TRANSPARENT,
        outlineWidth: 0
      }
    })
    
    const entity = viewer.value.entities.add({
      id: 'heilin-station',
      position: heilinPosition,
      billboard: {
        image: '/src/assets/images/水文站.png',
        verticalOrigin: Cesium.VerticalOrigin.BOTTOM,
        horizontalOrigin: Cesium.HorizontalOrigin.CENTER,
        pixelOffset: new Cesium.Cartesian2(0, -15),
        scale: 0.8,
        width: 30,
        height: 37.5,
        disableDepthTestDistance: Number.POSITIVE_INFINITY
      },
      label: {
        text: '水位 3.25m\n流量 12.5m³/s\n降雨量 0.5mm/h',
        font: 'bold 14px 黑体',
        fillColor: Cesium.Color.WHITE,
        outlineColor: Cesium.Color.fromCssColorString('#003860'),
        outlineWidth: 2,
        style: Cesium.LabelStyle.FILL_AND_OUTLINE,
        verticalOrigin: Cesium.VerticalOrigin.BOTTOM,
        horizontalOrigin: Cesium.HorizontalOrigin.LEFT,
        pixelOffset: new Cesium.Cartesian2(0, -30),
        showBackground: true,
        backgroundColor: new Cesium.Color(0, 0.3, 0.5, 0.7),
        backgroundPadding: new Cesium.Cartesian2(8, 4),
        disableDepthTestDistance: Number.POSITIVE_INFINITY
      }
    })
    
    // 添加标题标签
    viewer.value.entities.add({
      id: 'heilin-station-title',
      position: heilinPosition,
      label: {
        text: '黑林水文站',
        font: 'bold 14px sans-serif',
        fillColor: Cesium.Color.WHITE,
        outlineColor: Cesium.Color.fromCssColorString('#003860'),
        outlineWidth: 2,
        style: Cesium.LabelStyle.FILL_AND_OUTLINE,
        verticalOrigin: Cesium.VerticalOrigin.BOTTOM,
        horizontalOrigin: Cesium.HorizontalOrigin.LEFT,
        pixelOffset: new Cesium.Cartesian2(0, -85),
        showBackground: true,
        backgroundColor: new Cesium.Color(0, 0.2, 0.4, 0.9),
        backgroundPadding: new Cesium.Cartesian2(22, 4),
        disableDepthTestDistance: Number.POSITIVE_INFINITY
      }
    })

    // 添加塔山小水库POI
    const reservoirPosition = Cesium.Cartesian3.fromDegrees(118.9540555, 34.9355329)
    
    const reservoirEntity = viewer.value.entities.add({
      id: 'tashan-reservoir',
      position: reservoirPosition,
      billboard: {
        image: '/src/assets/images/水库蓝.png',
        verticalOrigin: Cesium.VerticalOrigin.BOTTOM,
        horizontalOrigin: Cesium.HorizontalOrigin.CENTER,
        pixelOffset: new Cesium.Cartesian2(0, -15),
        scale: 0.8,
        width: 30,
        height: 30,
        disableDepthTestDistance: Number.POSITIVE_INFINITY
      },
      label: {
        text: '库水位 18.5m\n库容 2350.8万m³\n汛限 20.0m',
        font: 'bold 14px 黑体',
        fillColor: Cesium.Color.WHITE,
        outlineColor: Cesium.Color.fromCssColorString('#003860'),
        outlineWidth: 2,
        style: Cesium.LabelStyle.FILL_AND_OUTLINE,
        verticalOrigin: Cesium.VerticalOrigin.BOTTOM,
        horizontalOrigin: Cesium.HorizontalOrigin.LEFT,
        pixelOffset: new Cesium.Cartesian2(0, -30),
        showBackground: true,
        backgroundColor: new Cesium.Color(0, 0.3, 0.5, 0.7),
        backgroundPadding: new Cesium.Cartesian2(8, 4),
        disableDepthTestDistance: Number.POSITIVE_INFINITY
      }
    })
    
    // 添加标题标签
    viewer.value.entities.add({
      id: 'tashan-reservoir-title',
      position: reservoirPosition,
      label: {
        text: '小塔山水库',
        font: 'bold 14px sans-serif',
        fillColor: Cesium.Color.WHITE,
        outlineColor: Cesium.Color.fromCssColorString('#003860'),
        outlineWidth: 2,
        style: Cesium.LabelStyle.FILL_AND_OUTLINE,
        verticalOrigin: Cesium.VerticalOrigin.BOTTOM,
        horizontalOrigin: Cesium.HorizontalOrigin.LEFT,
        pixelOffset: new Cesium.Cartesian2(0, -85),
        showBackground: true,
        backgroundColor: new Cesium.Color(0, 0.2, 0.4, 0.9),
        backgroundPadding: new Cesium.Cartesian2(22, 4),
        disableDepthTestDistance: Number.POSITIVE_INFINITY
      }
    })

    const handler = new Cesium.ScreenSpaceEventHandler(viewer.value.scene.canvas)
    
    handler.setInputAction((movement) => {
      // 尝试拾取所有对象
      const pickedObjects = viewer.value.scene.drillPick(movement.position)
      for (let i = 0; i < pickedObjects.length; i++) {
        const pickedObj = pickedObjects[i]
        if (Cesium.defined(pickedObj) && pickedObj.id) {
          if (pickedObj.id.id === 'heilin-station' || pickedObj.id.id === 'heilin-station-click') {
            showPopup.value = true
            popupPosition.value = { x: movement.position.x - 120, y: movement.position.y - 150 }
            break
          }
        }
      }
    }, Cesium.ScreenSpaceEventType.LEFT_CLICK)

    // 移除闪烁效果
    entity.billboard.scale = 0.8
    reservoirEntity.billboard.scale = 0.8
  }

const createPoiImage = () => {
  const canvas = document.createElement('canvas')
  canvas.width = 40
  canvas.height = 50
  const ctx = canvas.getContext('2d')
  
  ctx.beginPath()
  ctx.moveTo(20, 0)
  ctx.lineTo(40, 30)
  ctx.lineTo(20, 50)
  ctx.lineTo(0, 30)
  ctx.closePath()
  
  const gradient = ctx.createRadialGradient(20, 25, 5, 20, 25, 25)
  gradient.addColorStop(0, '#00ffff')
  gradient.addColorStop(1, '#0066ff')
  ctx.fillStyle = gradient
  ctx.fill()
  
  ctx.strokeStyle = '#ffffff'
  ctx.lineWidth = 2
  ctx.stroke()
  
  return canvas
}

const closePopup = () => {
  showPopup.value = false
}

const goToTwinStation = () => {
  // 执行平滑flyto动画到黑林水文站位置
  const heilinPosition = Cesium.Cartesian3.fromDegrees(118.8770798, 35.0320627, 10000)
  viewer.value.camera.flyTo({
    destination: heilinPosition,
    duration: 2.0,
    easingFunction: Cesium.EasingFunction.SINE_IN_OUT
  })
  
  // 延迟跳转到水文站详情页面
  setTimeout(() => {
    router.push('/heilin-station')
  }, 2000)
  
  closePopup()
}

onMounted(async () => {
  viewer.value = new Cesium.Viewer('cesiumContainer', {
    terrainProvider: await Cesium.createWorldTerrainAsync(),
    animation: false,
    baseLayerPicker: false,
    fullscreenButton: false,
    geocoder: false,
    homeButton: false,
    infoBox: false,
    sceneModePicker: false,
    selectionIndicator: false,
    timeline: false,
    navigationHelpButton: false,
    navigationInstructionsInitiallyVisible: false,
    shouldAnimate: false,
    showRenderLoopErrors: false
  })
  
  if (viewer.value.cesiumWidget.creditContainer) {
    viewer.value.cesiumWidget.creditContainer.style.display = 'none'
  }
  
  const toolbar = viewer.value._element.querySelector('.cesium-viewer-toolbar')
  if (toolbar) toolbar.style.display = 'none'
  
  const animationContainer = viewer.value._element.querySelector('.cesium-viewer-animationContainer')
  if (animationContainer) animationContainer.style.display = 'none'
  
  const timelineContainer = viewer.value._element.querySelector('.cesium-viewer-timelineContainer')
  if (timelineContainer) timelineContainer.style.display = 'none'

  try {
    // 加载流域边界GeoJSON
    const response = await fetch('/Heilin.geojson')
    const geojson = await response.json()
    
    const dataSource = await Cesium.GeoJsonDataSource.load(geojson, {
      stroke: Cesium.Color.fromCssColorString('#00d5ff'),
      strokeWidth: 3,
      fill: Cesium.Color.fromCssColorString('#00d5ff').withAlpha(0.1)
    })
    
    viewer.value.dataSources.add(dataSource)
    
    // 加载水系GeoJSON
    try {
      const waterResponse = await fetch('/黑林水系.geojson')
      const waterGeojson = await waterResponse.json()
      
      const waterDataSource = await Cesium.GeoJsonDataSource.load(waterGeojson, {
        stroke: Cesium.Color.fromCssColorString('#62f6fb'),
        strokeWidth: 2,
        fill: Cesium.Color.fromCssColorString('#62f6fb').withAlpha(0.2)
      })
      
      viewer.value.dataSources.add(waterDataSource)
    } catch (waterError) {
      console.error('加载水系GeoJSON失败:', waterError)
    }
    
    // 加载小塔山水库GeoJSON
    try {
      const reservoirResponse = await fetch('/小塔山水库.geojson')
      const reservoirGeojson = await reservoirResponse.json()
      
      const reservoirDataSource = await Cesium.GeoJsonDataSource.load(reservoirGeojson, {
        stroke: Cesium.Color.fromCssColorString('#00d4ff'),
        strokeWidth: 2,
        fill: Cesium.Color.fromCssColorString('#00d4ff').withAlpha(0.3)
      })
      
      viewer.value.dataSources.add(reservoirDataSource)
    } catch (reservoirError) {
      console.error('加载小塔山水库GeoJSON失败:', reservoirError)
    }
    
    const entities = dataSource.entities.values
    if (entities.length > 0) {
      let minLat = 90, maxLat = -90, minLon = 180, maxLon = -180
      
      for (const entity of entities) {
        if (entity.polygon && entity.polygon.hierarchy) {
          const hierarchy = entity.polygon.hierarchy.getValue()
          const positions = hierarchy.positions
          
          for (const pos of positions) {
            const cartographic = Cesium.Cartographic.fromCartesian(pos)
            const lat = Cesium.Math.toDegrees(cartographic.latitude)
            const lon = Cesium.Math.toDegrees(cartographic.longitude)
            
            minLat = Math.min(minLat, lat)
            maxLat = Math.max(maxLat, lat)
            minLon = Math.min(minLon, lon)
            maxLon = Math.max(maxLon, lon)
          }
        }
      }
      
      viewer.value.camera.flyTo({
        destination: Cesium.Cartesian3.fromDegrees(118.9019, 34.985, 33000),
        duration: 0
      })
    }
  } catch (error) {
    console.error('加载GeoJSON失败:', error)
    viewer.value.camera.flyTo({
        destination: Cesium.Cartesian3.fromDegrees(118.9019, 34.985, 33000),
        duration: 0
      })
  }

  addPoiMarker()
})

onUnmounted(() => {
  if (blinkInterval) {
    clearInterval(blinkInterval)
  }
  if (viewer.value) {
    viewer.value.destroy()
  }
})
</script>

<style scoped>
.poi-popup {
  position: fixed;
  width: 240px;
  background: rgba(0, 20, 40, 0.95);
  border: 1px solid rgba(0, 213, 255, 0.6);
  border-radius: 8px;
  box-shadow: 0 0 20px rgba(0, 213, 255, 0.4);
  z-index: 10;
  pointer-events: auto;
  overflow: hidden;
}

.popup-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 15px;
  background: linear-gradient(90deg, rgba(0, 60, 120, 0.9), rgba(0, 100, 150, 0.7));
  border-bottom: 1px solid rgba(0, 213, 255, 0.4);
}

.popup-title {
  font-size: 16px;
  font-weight: bold;
  color: #00ffff;
  text-shadow: 0 0 5px rgba(0, 255, 255, 0.5);
}

.popup-detail {
  font-size: 12px;
  color: #62f6fb;
  text-decoration: none;
  margin-left: 8px;
  cursor: pointer;
  transition: color 0.3s;
}

.popup-detail:hover {
  color: #ffffff;
  text-decoration: underline;
}

.popup-close {
  background: none;
  border: none;
  color: #7bbef6;
  font-size: 20px;
  cursor: pointer;
  padding: 0;
  line-height: 1;
  transition: color 0.3s;
}

.popup-close:hover {
  color: #ffffff;
}

.popup-content {
  padding: 15px;
}

.popup-section {
  margin-bottom: 15px;
}

.popup-section:last-child {
  margin-bottom: 0;
}

.popup-label {
  font-size: 14px;
  font-weight: bold;
  color: #62f6fb;
  margin-bottom: 8px;
  text-shadow: 0 0 3px rgba(0, 212, 255, 0.5);
}

.popup-value {
  font-size: 13px;
  color: #e0fcff;
  margin-bottom: 5px;
  line-height: 1.5;
}
</style>
