import * as Cesium from 'cesium'
import * as turf from '@turf/turf'
const { VITE_APP_BASE, VITE_APP_ENV, VITE_APP_REGION_URL } = import.meta.env

export const getLngLatDistance = (lat1, lng1, lat2, lng2) => {
	const radLat1 = (lat1 * Math.PI) / 180.0
	const radLat2 = (lat2 * Math.PI) / 180.0
	const a = radLat1 - radLat2
	const b = (lng1 * Math.PI) / 180.0 - (lng2 * Math.PI) / 180.0
	let s =
		2 *
		Math.asin(
			Math.sqrt(Math.pow(Math.sin(a / 2), 2) + Math.cos(radLat1) * Math.cos(radLat2) * Math.pow(Math.sin(b / 2), 2))
		)
	s = s * 6378.137 // EARTH_RADIUS;
	s = Math.round(s * 10000) / 10000
	return s * 1000
}

// 获取限polyline长度
export const getPolylineLength = entity => {
	let length = 0

	// 获取Polyline的所有顶点位置
	const positions = entity.polyline.positions.getValue()

	for (let i = 0; i < positions.length - 1; ++i) {
		const startPosition = positions[i]
		const endPosition = positions[i + 1]

		// 使用Cesium提供的distanceBetween函数计算两个顶点之间的距离
		const distance = Cesium.Cartesian3.distance(startPosition, endPosition)

		// 将每个顶点之间的距离相加得到总长度
		length += distance
	}

	return length
}

// 创建三角广告牌
export const createTriangleMarker = (title, color) => {
	// 创建canvas绘制广告牌
	const billboard = document.createElement('canvas')
	billboard.width = 30
	billboard.height = 30
	const ctx = billboard.getContext('2d')
	ctx.beginPath()
	ctx.moveTo(0, 0)
	ctx.lineTo(30, 0)
	ctx.lineTo(15, 22)
	ctx.fillStyle = color
	ctx.fill()
	ctx.font = '18px serif'
	ctx.fillStyle = '#ffffff'
	ctx.fillText(title, 10, 15)
	ctx.closePath()
	return billboard
}

export const createCircleBillboard = (title, color) => {
	const billboard = document.createElement('canvas')
	const ctx = billboard.getContext('2d')
	ctx.beginPath()
	ctx.ellipse(150, 90, 11, 11, 0, 0, Math.PI * 2)
	ctx.fillStyle = color
	ctx.fill()
	ctx.font = 'bold 15px serif'
	ctx.textAlign = 'center'
	ctx.fillStyle = '#ffffff'
	ctx.fillText(title, 150, 95)
	ctx.closePath()
	return billboard
}

// 获取当前经纬度海拔
export const getHaeHeight = (start, end) => {
	const ellipsoid = Cesium.Ellipsoid.WGS84 // 选择合适的椭圆体模型
	// const { longitude, latitude, height } = start
	// const { longitude: endLng, latitude: endLat, height: endHeight } = end
	// const startC3Position = new Cesium.Cartographic(longitude, latitude, height)
	// const endC3Position = new Cesium.Cartographic(endLng, endLat, endHeight)
	// const startCartesianPosition = ellipsoid.cartographicToCartesian(startC3Position)
	// const endCartesianPosition = ellipsoid.cartographicToCartesian(endC3Position)
	// // 计算两个位置之间的距离
	// const distance = new Cesium.EllipsoidGeodesic(startCartesianPosition, endCartesianPosition, ellipsoid)
	// return distance
	const { longitude, latitude, height } = end
	const cartographic = Cesium.Cartographic.fromDegrees(longitude, latitude, height)
	const cartesianPosition = ellipsoid.cartographicToCartesian(cartographic)
	const haeHeight = ellipsoid.cartesianToCartographic(cartesianPosition).height
	return haeHeight
}

// Cesium Cartesian3 转正常经纬度
export const cartesian3Convert = (cartesian3Position, viewer) => {
	// 转换为经纬度
	const ellipsoid = viewer.scene.globe.ellipsoid
	const cartographicPosition = Cesium.Cartographic.fromCartesian(cartesian3Position, ellipsoid)
	const longitude = Cesium.Math.toDegrees(cartographicPosition.longitude)
	const latitude = Cesium.Math.toDegrees(cartographicPosition.latitude)
	const height = cartographicPosition.height

	//   console.log('经度: ' + longitude);
	//   console.log('纬度: ' + latitude);
	//   console.log('高度: ' + height);

	return {
		longitude,
		latitude,
		height,
	}
}

// Cesium Cartesian2 转正常经纬度
export const cartesian2Convert = (position, viewer) => {
	const ellipsoid = viewer.scene.globe.ellipsoid
	const c3Position = viewer.scene.globe.pick(viewer.camera.getPickRay(position), viewer.scene)
	const c2Postion = ellipsoid.cartesianToCartographic(c3Position)
	const longitude = Cesium.Math.toDegrees(c2Postion.longitude)
	const latitude = Cesium.Math.toDegrees(c2Postion.latitude)
	return { longitude, latitude }
}

// 根据经纬度获取距离
export const getLnglatDist = (lng1, lat1, lng2, lat2) => {
	const start = new Cesium.Cartesian3.fromDegrees(Number(lng1), Number(lat1), 0)
	const end = new Cesium.Cartesian3.fromDegrees(Number(lng2), Number(lat2), 0)
	return Cesium.Cartesian3.distance(start, end)
}

/**
 * 地点坐标计算中心点
 * @param coordinateList {Array<Array<Object>>} [[{lat, lng}]]
 * @return { Object } {lat lng}
 */
export const getCenterPoint = coordinateList => {
	coordinateList = coordinateList.map(item => {
		const [lng, lat] = item
		return [{ lat, lng }]
	})
	const geoCoordinateListFlat = coordinateList.reduce((s, v) => {
		return (s = s.concat(v))
	}, [])
	const total = geoCoordinateListFlat.length
	let X = 0
	let Y = 0
	let Z = 0
	for (const g of geoCoordinateListFlat) {
		const lat = (g.lat * Math.PI) / 180
		const lon = (g.lng * Math.PI) / 180
		const x = Math.cos(lat) * Math.cos(lon)
		const y = Math.cos(lat) * Math.sin(lon)
		const z = Math.sin(lat)
		X += x
		Y += y
		Z += z
	}

	X = X / total
	Y = Y / total
	Z = Z / total
	const Lon = Math.atan2(Y, X)
	const Hyp = Math.sqrt(X * X + Y * Y)
	const Lat = Math.atan2(Z, Hyp)

	return { lng: (Lon * 180) / Math.PI, lat: (Lat * 180) / Math.PI }
}

/**
 * @description: 计算两组经纬度中距离最短的两个点
 * @param {*} lnglat1 [[xxx,xxx]]
 * @param {*} lnglat2 [[xxx,xxx]]
 * @return {*} { index: 1 }
 */
export const getShortestDistance = (lnglat1, lnglat2) => {
	const arr = []
	lnglat1.forEach((v, i) => {
		const [lng, lat] = v
		lnglat2.forEach((s, i2) => {
			const [vLng, vLat] = s
			const distance = getLnglatDist(lng, lat, vLng, vLat)
			arr.push({
				distance,
				index: [i, i2],
				lnglat: [v, s],
			})
		})
	})
	const newArr = arr.sort((a, b) => a.distance - b.distance)
	return newArr[0]
}

// 获取当前经纬度地形数据
export const getLnglatAltitude = (longitude, latitude, viewer) => {
	return new Promise((resolve, reject) => {
		// 假设 viewer 已经初始化并且 terrainProvider 是有效的
		const terrainProvider = viewer?.terrainProvider

		// 创建 Cartographic 对象
		const cartographic = Cesium.Cartographic.fromDegrees(longitude, latitude)

		// 获取地形数据的Promise
		const promise = Cesium.sampleTerrainMostDetailed(terrainProvider, [cartographic])

		// 使用 Cesium.when 处理 Promise
		promise
			.then(function (updatedPositions) {
				// updatedPositions 是一个数组，包含更新后的 Cartographic 对象
				const updatedPosition = updatedPositions[0]
				const height = updatedPosition.height
				const cartesian3 = Cesium.Cartesian3.fromDegrees(longitude, latitude, height)
				resolve({
					longitude,
					latitude,
					height,
					cartesian3,
				})
				// 在这里，你可以使用 height 值进行后续操作
			})
			.catch(function (error) {
				console.error('获取高程时发生错误:', error)
				reject(error)
			})
	})
}

// 批量获取航线经纬度对应高度信息
export const getPositionsHeight = (data, viewer, droneHeight = null) => {
	return new Promise((resolve, reject) => {
		if (!data || !data.length) {
			resolve([])

			return
		}

		// 假设 viewer 已经初始化并且 terrainProvider 是有效的
		const terrainProvider = viewer?.terrainProvider

		// 创建 Cartographic 对象
		const cartographics = data.map(item => {
			const [lng, lat] = item?.['Point']?.['coordinates']?.['#text'].split(',')

			return Cesium.Cartographic.fromDegrees(Number(lng), Number(lat))
		})

		// 获取地形数据的Promise
		const promise = Cesium.sampleTerrainMostDetailed(terrainProvider, cartographics)

		// 使用 Cesium.when 处理 Promise
		promise
			.then(function (updatedPositions) {
				// updatedPositions 是一个数组，包含更新后的 Cartographic 对象
				const newPosition = updatedPositions.map((item, index) => {
					const longitude = Cesium.Math.toDegrees(item.longitude)
					const latitude = Cesium.Math.toDegrees(item.latitude)

					let FinalHeight = Number(data[index]?.['ellipsoidHeight']?.['#text']) + Number(item.height)

					if (droneHeight) {
						FinalHeight = Number(data[index]?.['ellipsoidHeight']?.['#text']) + droneHeight
					}

					return {
						...data[index],
						longitude,
						latitude,
						FinalHeight,
						customHeight: Number(item.height),
					}
				})

				resolve(newPosition)
				// 在这里，你可以使用 height 值进行后续操作
			})
			.catch(function (error) {
				// console.error('获取高程时发生错误:', error);
				reject(error)
			})
	})
}

// 批量获取点数组经纬度对应高度信息
export const getPointPositionsHeight = (data, viewer, droneHeight = null) => {
	return new Promise((resolve, reject) => {
		if (!data || !data.length) {
			resolve([])

			return
		}

		// 假设 viewer 已经初始化并且 terrainProvider 是有效的
		const terrainProvider = viewer?.terrainProvider

		// 创建 Cartographic 对象
		const cartographics = data.map(item => {
			const { lng, lat } = item

			return Cesium.Cartographic.fromDegrees(Number(lng), Number(lat))
		})

		// 获取地形数据的Promise
		const promise = Cesium.sampleTerrainMostDetailed(terrainProvider, cartographics)

		// 使用 Cesium.when 处理 Promise
		promise
			.then(function (updatedPositions) {
				// updatedPositions 是一个数组，包含更新后的 Cartographic 对象
				const newPosition = updatedPositions.map((item, index) => {
					const longitude = Cesium.Math.toDegrees(item.longitude)
					const latitude = Cesium.Math.toDegrees(item.latitude)

					let pointData = {
						...data[index],
						longitude,
						latitude,
						ASL: Number(item.height),
						customHeight: Number(item.height),
					}

					if (droneHeight) pointData.TH = Number(item.height) + Number(droneHeight)

					return pointData
				})

				resolve(newPosition)
				// 在这里，你可以使用 height 值进行后续操作
			})
			.catch(function (error) {
				// console.error('获取高程时发生错误:', error);
				reject(error)
			})
	})
}

// 获取面中最高点
export const getPolygonMaxHeight = (turfPolygon, viewer) => {
	return new Promise((resolve, reject) => {
		const turfExtent = turf.bbox(turfPolygon)

		const turfSamplePoints = turf.pointGrid(turfExtent, 0.01, {
			units: 'kilometers',
			mask: turfPolygon,
		})

		// 假设 viewer 已经初始化并且 terrainProvider 是有效的
		const terrainProvider = viewer?.terrainProvider

		const cesiumSamplePoints = []
		for (let i = 0; i < turfSamplePoints.features.length; i++) {
			const coord = turfSamplePoints.features[i].geometry.coordinates
			cesiumSamplePoints.push(Cesium.Cartographic.fromDegrees(coord[0], coord[1]))
		}

		// 获取地形数据的Promise
		const promise = Cesium.sampleTerrainMostDetailed(terrainProvider, cesiumSamplePoints)

		promise
			.then(function (updatedPositions) {
				const newPosition = updatedPositions.map(item => Number(item.height))

				resolve(Math.max(...newPosition))
			})
			.catch(function (error) {
				reject(error)
			})
	})
}

// 展示当前的高度
export const getWaylineShowHeight = positions => {
	const { lng, lat } = getCenterPoint(positions)
	let maxDist = 0
	positions.forEach(item => {
		const [lng1, lat1] = item
		let pointsDist = getLnglatDist(lng1, lat1, lng, lat)
		if (pointsDist > maxDist) {
			maxDist = pointsDist
		}
	})
	return {
		lng,
		lat,
		showHeight: maxDist * 8,
	}
}

// 获取当前面是否有交叉点
export const isIntersection = coordinates => {
	const polyDikuai = turf.polygon([coordinates])
	const result = turf.kinks(polyDikuai)
	const resultFeatures = result.features
	if (resultFeatures.length === 0) {
		//无相交
		return false
	} else {
		//有相交
		return true
	}
}

/**
 * 飞到中心点并且所有点在可视范围
 *  @param positionsData 二维数组，每项为 [lon, lat] 或 三维数组 [lon, lat, height]
 *  @param viewer Cesium.Viewer 实例
 *  @param multiple 缩放倍数-默认为4
 *  @param pitch 俯仰角-默认为-90
 */
export function flyVisual({ positionsData, viewer, multiple = 4, pitch = -90 }) {
	if (!Array.isArray(positionsData) || positionsData.length === 0) return

	const positions = positionsData.map(([lon, lat, height]) =>
		Cesium.Cartesian3.fromDegrees(Number(lon), Number(lat), Number(height || 0))
	)

	// 计算最高高度和中心点经纬度
	let maxHeight = -Infinity
	let sumLon = 0,
		sumLat = 0
	for (const [lon, lat, height] of positionsData) {
		sumLon += Number(lon)
		sumLat += Number(lat)
		maxHeight = Math.max(maxHeight, Number(height || 0))
	}
	const centerLon = sumLon / positionsData.length
	const centerLat = sumLat / positionsData.length
	const boundingSphere = Cesium.BoundingSphere.fromPoints(positions)
	// 暂时飞向 BoundingSphere
	viewer.camera.flyToBoundingSphere(Cesium.BoundingSphere.fromPoints(positions), {
		duration: 0,
		offset: {
			heading: Cesium.Math.toRadians(0),
			pitch: Cesium.Math.toRadians(pitch),
			range: boundingSphere.radius * multiple,
		},
		complete: () => {
			// 飞行完成后检查相机高度是否小于最高点
			const cameraHeight = Cesium.Cartographic.fromCartesian(viewer.camera.position).height
			if (cameraHeight < maxHeight) {
				viewer.camera.flyTo({
					destination: Cesium.Cartesian3.fromDegrees(centerLon, centerLat, maxHeight + 100), // 加100米缓冲
					duration: 1.5,
					orientation: {
						heading: viewer.camera.heading,
						pitch: viewer.camera.pitch,
						roll: viewer.camera.roll,
					},
				})
			}
		},
	})
}

// 获取视口地图中心点
export function getMapCenterPoint(viewer) {
	const centerResult = viewer.camera.pickEllipsoid(
		new Cesium.Cartesian2(viewer.canvas.clientWidth / 2, viewer.canvas.clientHeight / 2)
	)
	const curPosition = Cesium.Ellipsoid.WGS84.cartesianToCartographic(centerResult)
	const longitude = (curPosition.longitude * 180) / Math.PI
	const latitude = (curPosition.latitude * 180) / Math.PI
	return { longitude, latitude }
}

// 获取屏幕四个角经纬度
export const getScreenCorner = viewer => {
	const camera = viewer.scene.camera
	const canvas = viewer.canvas

	// 获取屏幕左下角和右上角的世界坐标
	const leftBottom = new Cesium.Cartesian2(0, canvas.clientHeight)
	const rightTop = new Cesium.Cartesian2(canvas.clientWidth, 0)

	// 将屏幕坐标转为世界坐标
	const leftBottomWorld = camera.pickEllipsoid(leftBottom, viewer.scene.globe.ellipsoid)
	const rightTopWorld = camera.pickEllipsoid(rightTop, viewer.scene.globe.ellipsoid)

	// 将世界坐标转为经纬度
	const leftBottomCartographic = viewer.scene.globe.ellipsoid.cartesianToCartographic(leftBottomWorld)
	const rightTopCartographic = viewer.scene.globe.ellipsoid.cartesianToCartographic(rightTopWorld)

	// 获取经纬度
	const leftBottomLonLat = [
		Cesium.Math.toDegrees(leftBottomCartographic.longitude),
		Cesium.Math.toDegrees(leftBottomCartographic.latitude),
	]
	const rightTopLonLat = [
		Cesium.Math.toDegrees(rightTopCartographic.longitude),
		Cesium.Math.toDegrees(rightTopCartographic.latitude),
	]

	// 返回四个角的经纬度
	return {
		lb: leftBottomLonLat,
		rb: [rightTopLonLat[0], leftBottomLonLat[1]], // 右下角
		rt: rightTopLonLat,
		lt: [leftBottomLonLat[0], rightTopLonLat[1]], // 左上角
	}
}

// areaCode转换为目录结构, 返回数组,
export function areaCodeToArr(code) {
	const codeStr = code.toString()
	const provinceCode = codeStr.slice(0, 2) + '0000'
	const cityCode = codeStr.slice(0, 4) + '00'
	if (codeStr.slice(2, 4) === '00' && codeStr.slice(4, 6) === '00') {
		return [provinceCode]
	} else if (codeStr.slice(4, 6) === '00') {
		return [provinceCode, cityCode]
	}
	return [provinceCode, cityCode, codeStr]
}

// 根据区域code获取轮廓
export const getContourByCode = async areaCode => {
	const defaultDir = `${VITE_APP_REGION_URL}/100000/`
	const hierarchy = areaCodeToArr(areaCode.slice(0, 6))
	const jsonPathPre = hierarchy.slice(0, hierarchy.length - 1).join('/')
	const res = await fetch(`${defaultDir}${jsonPathPre}/index.json`)
	const parentGJson = await res.json()
	let features = parentGJson.features.find(item => item.properties.adcode === Number(hierarchy[hierarchy.length - 1]))
	return { type: 'FeatureCollection', features: [features] }
}

// 辅助函数：创建旋转文字的画布
export function createRotatedTextCanvas(time) {
	const prefix = '预计'
	const suffix = '分钟'
	const canvas = document.createElement('canvas')
	const context = canvas.getContext('2d')
	// 设置字体
	context.font = 'bold 16px Source Han Sans CN'
	// 测量各部分文本宽度
	const prefixWidth = context.measureText(prefix).width
	const timeWidth = context.measureText(time).width
	const suffixWidth = context.measureText(suffix).width
	const totalWidth = prefixWidth + timeWidth + suffixWidth
	const textHeight = 20 // 估算高度
	// 设置画布大小（增加边距）
	canvas.width = totalWidth + 30
	canvas.height = textHeight * 3
	// 重置上下文
	context.font = 'bold 16px Source Han Sans CN'
	context.textBaseline = 'middle'
	context.textAlign = 'left' // 改为左对齐，方便分段绘制
	// 清除画布
	context.clearRect(0, 0, canvas.width, canvas.height)
	// 绘制“预计”（白色）
	context.fillStyle = '#FFFFFF'
	context.fillText(prefix, 10, 15)
	// 绘制时间（蓝色）
	context.font = 'bold 30px Source Han Sans CN'
	context.fillStyle = '#1EE7E7' // 亮蓝色
	context.fillText(time, 10 + prefixWidth, 12)
	// 绘制“分钟”（白色）
	context.font = 'bold 16px Source Han Sans CN'
	context.fillStyle = '#FFFFFF'
	context.fillText(suffix, 20 + prefixWidth + timeWidth, 15)

	return canvas
}