import { ref, onUnmounted } from 'vue'
import { useI18n } from 'vue-i18n'
import { useProgress } from './useProgress'
import useUserStore from '@/stores/use-user-store'
import { ucardApi } from '@/api/ucard'
import { userToken } from '@/composables/config'
import config from '@/config'
import { trim } from 'lodash'

// ================== 类型声明 ==================

declare const plus: any
declare const uni: any

interface PlusDownloaderDownload {
  filename: string
  pause?: () => void
  resume?: () => void
  start: () => void
  abort: () => void
  addEventListener: (event: string, callback: (data: any) => void) => void
  removeEventListener?: (event: string, callback: (data: any) => void) => void
}

// ================== 常量定义 ==================

/** 存储键名 */
const STORAGE_KEYS = {
  LAST_CHECK: 'last_update_check_time',
  SKIP_VERSION: 'skip_update_version',
  DOWNLOAD_CACHE: 'app_download_cache',
} as const

/** 下载状态码 */
enum DownloadState {
  DOWNLOADING = 3, // 下载中
  COMPLETED = 4    // 下载完成
}

/** HTTP 成功状态码 */
enum HttpStatus {
  OK = 200,            // 成功
  PARTIAL_CONTENT = 206 // 部分内容（断点续传）
}

/** 下载配置 */
const DOWNLOAD_CONFIG = {
  FILE_PATH: '_downloads/app_update.wgt',
  MAX_RETRY: 3,              // 最大重试次数
  RETRY_DELAY: 2000,         // 重试延迟（毫秒）
  TOAST_DURATION: 2000,       // Toast 显示时长
} as const

// ================== 类型定义 ==================

/** 更新信息 */
interface UpdateInfo {
  version: string
  forceUpdate: boolean
  wgtUrl?: string
  iosStoreUrl?: string
}

/** 下载缓存 */
interface DownloadCache {
  url: string
  progress: number
  time: number
}

/** API 响应 */
interface ApiResponse<T = any> {
  code: number
  data?: T
  message?: string
}

/** 下载状态变化事件 */
interface DownloadStateEvent {
  state: number
  downloadedSize: number
  totalSize: number
}

/** 平台类型 */
type PlatformType = 'ios' | 'android'

/** 设备类型 */
type EquipmentType = 'ios' | 'Android'

// ================== 工具函数 ==================

/**
 * 获取当前应用版本
 */
function getCurrentVersion(): Promise<string> {
  return new Promise((resolve, reject) => {
    // #ifdef APP-PLUS
    try {
      plus.runtime.getProperty(plus.runtime.appid, (info) => {
        resolve(info.version)
      }, (error) => {
        reject(error)
      })
    } catch (error) {
      reject(error)
    }
    // #endif
    // #ifndef APP-PLUS
    reject(new Error('Not in APP-PLUS environment'))
    // #endif
  })
}

/**
 * 比较版本号
 * @returns 1: v1 > v2, -1: v1 < v2, 0: v1 === v2
 */
function compareVersion(v1: string, v2: string): number {
  const normalizeVersion = (v: string): number[] => {
    return v.split('.').map(segment => parseInt(segment || '0', 10))
  }

  const parts1 = normalizeVersion(v1)
  const parts2 = normalizeVersion(v2)
  const maxLength = Math.max(parts1.length, parts2.length)

  for (let i = 0; i < maxLength; i++) {
    const num1 = parts1[i] || 0
    const num2 = parts2[i] || 0
    if (num1 > num2) return 1
    if (num1 < num2) return -1
  }
  return 0
}

/**
 * 获取平台类型
 */
function getPlatform(): PlatformType {
  // #ifdef APP-PLUS
  try {
    const platform = uni.getSystemInfoSync().platform
    return platform === 'ios' ? 'ios' : 'android'
  } catch (error) {
    //  console.error('获取平台类型失败:', error)
    return 'android'
  }
  // #endif
  // #ifndef APP-PLUS
  return 'android'
  // #endif
}

/**
 * 获取设备类型（API 参数格式）
 */
function getEquipmentType(): EquipmentType {
  return getPlatform() === 'ios' ? 'ios' : 'Android'
}

/**
 * 显示 Toast 提示
 */
function showToast(message: string, duration = DOWNLOAD_CONFIG.TOAST_DURATION): void {
  uni.showToast({
    title: message,
    icon: 'none',
    duration,
  })
}

/**
 * 安全地获取存储值
 */
function getStorageSync<T = any>(key: string, defaultValue: T | null = null): T | null {
  try {
    return uni.getStorageSync(key) || defaultValue
  } catch (error) {
    //  console.warn(`获取存储失败: ${key}`, error)
    return defaultValue
  }
}

/**
 * 安全地设置存储值
 */
function setStorageSync(key: string, value: any): boolean {
  try {
    uni.setStorageSync(key, value)
    return true
  } catch (error) {
    //  console.warn(`设置存储失败: ${key}`, error)
    return false
  }
}

/**
 * 安全地移除存储值
 */
function removeStorageSync(key: string): boolean {
  try {
    uni.removeStorageSync(key)
    return true
  } catch (error) {
    //  console.warn(`移除存储失败: ${key}`, error)
    return false
  }
}

// ================== 主函数 ==================

export function useAppUpdate() {
  const { t } = useI18n()
  const { Host80 } = config
  // 测试环境地址
  // const Host80 = 'https://secure.44a5c8109e4.com/'
  const userStore = useUserStore()
  const progress = useProgress()

  const checking = ref(false)
  const updating = ref(false)

  const lastVersion = ref('')

  let downloadTask: PlusDownloaderDownload | null = null
  let networkListener: ((res: any) => void) | null = null
  let downloadUrl = ''
  let retryCount = 0
  let stateChangeHandler: ((d: any) => void) | null = null

  // ================== 对外入口 ==================

  /**
   * 检查应用更新
   */
  async function checkUpdate(): Promise<void> {
    // #ifdef APP-PLUS
    if (checking.value) {
      //  console.warn('更新检查已在进行中')
      return
    }

    checking.value = true

    try {

      const res = await uni.request({
        url: `${Host80}/wgt/list.json?_t=${Date.now()}`,
        method: 'GET',
        timeout: 5000,
      })

      console.log('up:filedata', res)
      const currentVersion = await getCurrentVersion()
      console.log(currentVersion, 'currentVersion')
      const files = res.data?.files || []
      if (!files.length) return
      const latestFile = files[files.length - 1]
      const latestVersion = latestFile
      console.log('last', latestFile, latestVersion)
      if (!latestFile) return
      lastVersion.value = latestVersion
      const lastInstalled = uni.getStorageSync('lastWgtVersion')
      console.log(lastInstalled, 'lastInstalled')

      if (latestVersion === lastInstalled) return
      console.log('版本对比', compareVersion(latestVersion, currentVersion))
      const needUpdate = compareVersion(latestVersion, currentVersion) > 0

      // 保存版本信息
      userStore.saveAppVersion({
        currentVersion,
        version: latestVersion,
        isUpdate: !needUpdate,
      })

      if (!needUpdate) {
        //  console.log('当前已是最新版本')
        return
      }

      // 检查是否已跳过此版本
      // const skipVersion = getStorageSync<string>(STORAGE_KEYS.SKIP_VERSION)
      // if (!update.forceUpdate && skipVersion === update.version) {
      //     //  console.log('用户已跳过此版本更新')
      //     return
      // }

      // 显示更新提示
      const url = `${Host80}/wgt/CwgApp_${latestVersion}.wgt`
      console.log('url',url)
      showForceUpdate({ version: latestVersion, forceUpdate: true, wgtUrl: url })
    } catch (error) {
      //  console.error('检查更新失败:', error)
      const errorMsg = error instanceof Error ? error.msg : String(error)
      showToast(t('mine.p28') || `检查更新失败: ${errorMsg}`)
    } finally {
      checking.value = false
    }
    // #endif
  }

  // ================== 更新流程 ==================

  /**
   * 显示强制更新弹窗
   */
  function showForceUpdate(update: UpdateInfo): void {
    uni.showModal({
      title: t('mine.p22'),
      content: t('mine.p23'),
      showCancel: false,
      confirmText: t('mine.p35'),
      success: () => doUpdate(update),
    })
  }

  /**
   * 显示可选更新弹窗
   */
  function showOptionalUpdate(update: UpdateInfo): void {
    uni.showModal({
      title: t('mine.p24'),
      content: t('mine.p25', { version: `v${update.version}` }),
      confirmText: t('mine.p35'),
      cancelText: t('mine.p36'),
      success: (res) => {
        if (res.confirm) {
          doUpdate(update)
        } else {
          // 记录跳过的版本
          setStorageSync(STORAGE_KEYS.SKIP_VERSION, update.version)
        }
      },
    })
  }

  /**
   * 执行更新
   */
  function doUpdate(update: UpdateInfo): void {
    console.log(update)
    const platform = getPlatform()

    // ios不走这里面
    if (platform === 'ios') {
      // handleIosUpdate(update)
    } else {
      handleAndroidUpdate(update)
    }
  }

  /**
   * 处理 iOS 更新
   */
  function handleIosUpdate(update: UpdateInfo): void {
    if (!update.iosStoreUrl) {
      showToast(t('mine.p28') || 'iOS 更新链接不存在')
      return
    }

    try {
      plus.runtime.openURL(update.iosStoreUrl)
    } catch (error) {
      //  console.error('打开 App Store 失败:', error)
      showToast(t('mine.p28') || '打开 App Store 失败')
    }
  }

  /**
   * 处理 Android 更新
   */
  function handleAndroidUpdate(update: UpdateInfo): void {
    console.log('up2',update)
    if (!update.wgtUrl) {
        showToast(t('mine.p28') || '更新包链接不存在')
        return
    }

    downloadWgt(update.wgtUrl)
  }

  // ================== 下载核心 ==================

  /**
   * 下载 wgt 更新包
   */
  function downloadWgt(url: string): void {
    // #ifdef APP-PLUS
    if (downloadTask) {
       console.log('下载任务已存在')
      return
    }

    if (!url || !isValidUrl(url)) {
      handleDownloadFail(t('mine.p28') || '下载链接无效')
      return
    }

    downloadUrl = url
    retryCount = 0
    updating.value = true
    progress.show(t('mine.p29'))

    // 初始化网络监听
    initNetworkType()
    startNetworkMonitor()

    createDownloadTask(url)
    // #endif
  }

  /**
   * 创建下载任务
   */
  function createDownloadTask(url: string): void {
    try {
      downloadTask = plus.downloader.createDownload(
        url,
        { filename: DOWNLOAD_CONFIG.FILE_PATH },
        handleDownloadComplete,
      )

      if (!downloadTask) {
        throw new Error('创建下载任务失败')
      }

      // 创建状态变化处理器
      stateChangeHandler = handleDownloadStateChanged
      downloadTask.addEventListener('statechanged', stateChangeHandler)
      downloadTask.start()
    } catch (error) {
      //  console.error('创建下载任务失败:', error)
      downloadTask = null
      handleDownloadFail(t('mine.p28') || '创建下载任务失败')
    }
  }

  /**
   * 验证 URL 格式
   */
  function isValidUrl(url: string): boolean {
    try {
      return /^https?:\/\/.+/.test(url)
    } catch {
      return false
    }
  }

  /**
   * 处理下载完成回调
   */
  function handleDownloadComplete(download: PlusDownloaderDownload, status: number): void {
    const isSuccess = status === HttpStatus.OK || status === HttpStatus.PARTIAL_CONTENT

    if (isSuccess) {
      //  console.log('下载成功，准备安装')
      clearCache()
      stopNetworkMonitor()
      installWgt(download.filename)
    } else {
      //  console.error('下载失败，状态码:', status)
      retryDownload()
    }
  }

  /**
   * 处理下载状态变化
   */
  function handleDownloadStateChanged(event: DownloadStateEvent): void {
    if (event.state === DownloadState.DOWNLOADING && event.totalSize > 0) {
      const percent = Math.min(100, Math.floor((event.downloadedSize / event.totalSize) * 100))
      const progressText = `${t('mine.p29')} ${percent}%`
      progress.update(percent, progressText)
      saveCache(percent)
    }
  }

  /**
   * 重试下载
   */
  function retryDownload(): void {
    if (retryCount >= DOWNLOAD_CONFIG.MAX_RETRY) {
      //  console.error(`下载失败，已重试 ${retryCount} 次`)
      handleDownloadFail(t('mine.p28') || '下载失败')
      return
    }

    retryCount++
    //  console.log(`下载失败，${DOWNLOAD_CONFIG.RETRY_DELAY / 1000}秒后重试 (${retryCount}/${DOWNLOAD_CONFIG.MAX_RETRY})`)

    cleanupDownloadTask()

    setTimeout(() => {
      if (downloadUrl) {
        createDownloadTask(downloadUrl)
      }
    }, DOWNLOAD_CONFIG.RETRY_DELAY)
  }

  /**
   * 初始化网络类型
   */
  function initNetworkType(): void {
    uni.getNetworkType({
      success: (res) => {
        //  console.log('当前网络类型:', res.networkType)
      },
      fail: (error) => {
        //  console.warn('获取网络类型失败:', error)
      },
    })
  }

  // ================== 网络处理 ==================

  /**
   * 启动网络监听
   */
  function startNetworkMonitor(): void {
    // #ifdef APP-PLUS
    if (networkListener) {
      //  console.warn('网络监听已存在')
      return
    }

    networkListener = (res: any) => {
      if (!downloadTask || !updating.value) {
        return
      }

      if (!res.isConnected) {
        // 网络断开，暂停下载
        pauseDownload()
        return
      }

      // 网络恢复，继续下载
      resumeDownload()
    }

    uni.onNetworkStatusChange(networkListener)
    // #endif
  }

  /**
   * 暂停下载
   */
  function pauseDownload(): void {
    if (!downloadTask) return

    try {
      if (typeof downloadTask.pause === 'function') {
        downloadTask.pause()
      }
    } catch (error) {
      //  console.error('暂停下载失败:', error)
    }
  }

  /**
   * 恢复下载
   */
  function resumeDownload(): void {
    if (!downloadTask) return

    try {
      if (typeof downloadTask.resume === 'function') {
        downloadTask.resume()
      } else if (typeof downloadTask.start === 'function') {
        downloadTask.start()
      }
    } catch (error) {
      //  console.error('恢复下载失败，尝试重新开始:', error)
      // 失败时尝试重新开始
      try {
        if (downloadTask.start) {
          downloadTask.start()
        }
      } catch (e2) {
        //  console.error('重新开始下载也失败:', e2)
      }
    }
  }

  /**
   * 停止网络监听
   */
  function stopNetworkMonitor(): void {
    if (networkListener) {
      uni.offNetworkStatusChange(networkListener)
      networkListener = null
    }
  }

  // ================== 安装 ==================

  /**
   * 安装 wgt 更新包
   */
  function installWgt(path: string): void {
    // #ifdef APP-PLUS
    try {
      plus.runtime.install(
        path,
        { force: true },
        () => {
          // 安装成功
          progress.hide()
          updating.value = false
          uni.showModal({
            title: t('mine.p37'),
            content: t('mine.p38'),
            showCancel: false,
            success: () => {
              uni.setStorageSync('lastWgtVersion', lastVersion.value)
              console.log('[wgt] install success:', lastVersion.value)
              uni.setStorageSync('wgtNeedRestart', true)
              plus.runtime.restart()
            },
          })
        },
        (error) => {
          // 安装失败
          //  console.error('安装失败:', error)
          handleDownloadFail(t('mine.p33'))
        },
      )
    } catch (error) {
      //  console.error('安装异常:', error)
      handleDownloadFail(t('mine.p33'))
    }
    // #endif
  }

  // ================== 缓存管理 ==================

  /**
   * 保存下载缓存
   */
  function saveCache(progressPercent: number): void {
    const cache: DownloadCache = {
      url: downloadUrl,
      progress: progressPercent,
      time: Date.now(),
    }
    setStorageSync(STORAGE_KEYS.DOWNLOAD_CACHE, cache)
  }

  /**
   * 清除下载缓存
   */
  function clearCache(): void {
    removeStorageSync(STORAGE_KEYS.DOWNLOAD_CACHE)
  }

  // ================== 错误处理 ==================

  /**
   * 处理下载失败
   */
  function handleDownloadFail(msg: string): void {
    progress.hide()
    updating.value = false
    retryCount = 0
    stopNetworkMonitor()
    cleanupDownloadTask()
    showToast(msg)
  }

  /**
   * 清理下载任务
   */
  function cleanupDownloadTask(): void {
    if (!downloadTask) return

    try {
      // 移除事件监听
      if (stateChangeHandler && downloadTask.removeEventListener) {
        downloadTask.removeEventListener('statechanged', stateChangeHandler)
      }

      // 中止下载
      downloadTask.abort()
    } catch (error) {
      //  console.warn('清理下载任务失败:', error)
    } finally {
      downloadTask = null
      stateChangeHandler = null
    }
  }

  /**
   * 取消更新
   */
  function cancelUpdate(): void {
    if (!updating.value) {
      //  console.warn('当前没有正在进行的更新')
      return
    }

    //  console.log('用户取消更新')
    handleDownloadFail(t('mine.p39') || '已取消更新')
  }

  // ================== 生命周期 ==================

  onUnmounted(() => {
    //  console.log('useAppUpdate 组件卸载，清理资源')
    stopNetworkMonitor()
    cleanupDownloadTask()
    retryCount = 0
  })

  return {
    checkUpdate,
    cancelUpdate,
    checking,
    updating,
  }
}