import { app, BrowserWindow, ipcMain, nativeTheme } from 'electron'
import { Worker } from 'worker_threads'
import { join } from 'path'
import { autoUpdater } from 'electron-updater'
import { readFile, writeFile, mkdir } from 'fs/promises'
import { existsSync } from 'fs'
import { ConfigService } from './services/config'
import { dbPathService } from './services/dbPathService'
import { wcdbService } from './services/wcdbService'
import { chatService } from './services/chatService'
import { imageDecryptService } from './services/imageDecryptService'
import { imagePreloadService } from './services/imagePreloadService'
import { analyticsService } from './services/analyticsService'
import { groupAnalyticsService } from './services/groupAnalyticsService'
import { annualReportService } from './services/annualReportService'
import { exportService, ExportOptions } from './services/exportService'
import { KeyService } from './services/keyService'


// 配置自动更新
autoUpdater.autoDownload = false
autoUpdater.autoInstallOnAppQuit = true
autoUpdater.disableDifferentialDownload = true  // 禁用差分更新，强制全量下载
const AUTO_UPDATE_ENABLED =
  process.env.AUTO_UPDATE_ENABLED === 'true' ||
  process.env.AUTO_UPDATE_ENABLED === '1' ||
  (process.env.AUTO_UPDATE_ENABLED == null && !process.env.VITE_DEV_SERVER_URL)

// 单例服务
let configService: ConfigService | null = null

// 协议窗口实例
let agreementWindow: BrowserWindow | null = null
let onboardingWindow: BrowserWindow | null = null
const keyService = new KeyService()

let mainWindowReady = false
let shouldShowMain = true

function createWindow(options: { autoShow?: boolean } = {}) {
  // 获取图标路径 - 打包后在 resources 目录
  const { autoShow = true } = options
  const isDev = !!process.env.VITE_DEV_SERVER_URL
  const iconPath = isDev
    ? join(__dirname, '../public/icon.ico')
    : join(process.resourcesPath, 'icon.ico')

  const win = new BrowserWindow({
    width: 1400,
    height: 900,
    minWidth: 1000,
    minHeight: 700,
    icon: iconPath,
    webPreferences: {
      preload: join(__dirname, 'preload.js'),
      contextIsolation: true,
      nodeIntegration: false
    },
    titleBarStyle: 'hidden',
    titleBarOverlay: {
      color: '#00000000',
      symbolColor: '#1a1a1a',
      height: 40
    },
    show: false
  })

  // 窗口准备好后显示
  win.once('ready-to-show', () => {
    mainWindowReady = true
    if (autoShow || shouldShowMain) {
      win.show()
    }
  })

  // 开发环境加载 vite 服务器
  if (process.env.VITE_DEV_SERVER_URL) {
    win.loadURL(process.env.VITE_DEV_SERVER_URL)

    // 开发环境下按 F12 或 Ctrl+Shift+I 打开开发者工具
    win.webContents.on('before-input-event', (event, input) => {
      if (input.key === 'F12' || (input.control && input.shift && input.key === 'I')) {
        if (win.webContents.isDevToolsOpened()) {
          win.webContents.closeDevTools()
        } else {
          win.webContents.openDevTools()
        }
        event.preventDefault()
      }
    })
  } else {
    win.loadFile(join(__dirname, '../dist/index.html'))
  }

  return win
}

/**
 * 创建用户协议窗口
 */
function createAgreementWindow() {
  // 如果已存在，聚焦
  if (agreementWindow && !agreementWindow.isDestroyed()) {
    agreementWindow.focus()
    return agreementWindow
  }

  const isDev = !!process.env.VITE_DEV_SERVER_URL
  const iconPath = isDev
    ? join(__dirname, '../public/icon.ico')
    : join(process.resourcesPath, 'icon.ico')

  const isDark = nativeTheme.shouldUseDarkColors

  agreementWindow = new BrowserWindow({
    width: 700,
    height: 600,
    minWidth: 500,
    minHeight: 400,
    icon: iconPath,
    webPreferences: {
      preload: join(__dirname, 'preload.js'),
      contextIsolation: true,
      nodeIntegration: false
    },
    titleBarStyle: 'hidden',
    titleBarOverlay: {
      color: '#00000000',
      symbolColor: isDark ? '#FFFFFF' : '#333333',
      height: 32
    },
    show: false,
    backgroundColor: isDark ? '#1A1A1A' : '#FFFFFF'
  })

  agreementWindow.once('ready-to-show', () => {
    agreementWindow?.show()
  })

  if (process.env.VITE_DEV_SERVER_URL) {
    agreementWindow.loadURL(`${process.env.VITE_DEV_SERVER_URL}#/agreement-window`)
  } else {
    agreementWindow.loadFile(join(__dirname, '../dist/index.html'), { hash: '/agreement-window' })
  }

  agreementWindow.on('closed', () => {
    agreementWindow = null
  })

  return agreementWindow
}

/**
 * 创建首次引导窗口
 */
function createOnboardingWindow() {
  if (onboardingWindow && !onboardingWindow.isDestroyed()) {
    onboardingWindow.focus()
    return onboardingWindow
  }

  const isDev = !!process.env.VITE_DEV_SERVER_URL
  const iconPath = isDev
    ? join(__dirname, '../public/icon.ico')
    : join(process.resourcesPath, 'icon.ico')

  onboardingWindow = new BrowserWindow({
    width: 1100,
    height: 720,
    minWidth: 900,
    minHeight: 600,
    frame: false,
    transparent: true,
    backgroundColor: '#00000000',
    hasShadow: false,
    icon: iconPath,
    webPreferences: {
      preload: join(__dirname, 'preload.js'),
      contextIsolation: true,
      nodeIntegration: false
    },
    show: false
  })

  onboardingWindow.once('ready-to-show', () => {
    onboardingWindow?.show()
  })

  if (process.env.VITE_DEV_SERVER_URL) {
    onboardingWindow.loadURL(`${process.env.VITE_DEV_SERVER_URL}#/onboarding-window`)
  } else {
    onboardingWindow.loadFile(join(__dirname, '../dist/index.html'), { hash: '/onboarding-window' })
  }

  onboardingWindow.on('closed', () => {
    onboardingWindow = null
  })

  return onboardingWindow
}

function showMainWindow() {
  shouldShowMain = true
  if (mainWindowReady) {
    mainWindow?.show()
  }
}

// 注册 IPC 处理器
function registerIpcHandlers() {
  // 配置相关
  ipcMain.handle('config:get', async (_, key: string) => {
    return configService?.get(key as any)
  })

  ipcMain.handle('config:set', async (_, key: string, value: any) => {
    return configService?.set(key as any, value)
  })

  ipcMain.handle('config:clear', async () => {
    configService?.clear()
    return true
  })

  // 文件对话框
  ipcMain.handle('dialog:openFile', async (_, options) => {
    const { dialog } = await import('electron')
    return dialog.showOpenDialog(options)
  })

  ipcMain.handle('dialog:openDirectory', async (_, options) => {
    const { dialog } = await import('electron')
    return dialog.showOpenDialog({
      properties: ['openDirectory', 'createDirectory'],
      ...options
    })
  })

  ipcMain.handle('dialog:saveFile', async (_, options) => {
    const { dialog } = await import('electron')
    return dialog.showSaveDialog(options)
  })

  ipcMain.handle('shell:openPath', async (_, path: string) => {
    const { shell } = await import('electron')
    return shell.openPath(path)
  })

  ipcMain.handle('shell:openExternal', async (_, url: string) => {
    const { shell } = await import('electron')
    return shell.openExternal(url)
  })

  ipcMain.handle('app:getDownloadsPath', async () => {
    return app.getPath('downloads')
  })

  ipcMain.handle('app:getVersion', async () => {
    return app.getVersion()
  })

  ipcMain.handle('log:getPath', async () => {
    return join(app.getPath('userData'), 'logs', 'wcdb.log')
  })

  ipcMain.handle('log:read', async () => {
    try {
      const logPath = join(app.getPath('userData'), 'logs', 'wcdb.log')
      const content = await readFile(logPath, 'utf8')
      return { success: true, content }
    } catch (e) {
      return { success: false, error: String(e) }
    }
  })

  ipcMain.handle('app:checkForUpdates', async () => {
    if (!AUTO_UPDATE_ENABLED) {
      return { hasUpdate: false }
    }
    try {
      const result = await autoUpdater.checkForUpdates()
      if (result && result.updateInfo) {
        const currentVersion = app.getVersion()
        const latestVersion = result.updateInfo.version
        if (latestVersion !== currentVersion) {
          return {
            hasUpdate: true,
            version: latestVersion,
            releaseNotes: result.updateInfo.releaseNotes as string || ''
          }
        }
      }
      return { hasUpdate: false }
    } catch (error) {
      console.error('检查更新失败:', error)
      return { hasUpdate: false }
    }
  })

  ipcMain.handle('app:downloadAndInstall', async (event) => {
    if (!AUTO_UPDATE_ENABLED) {
      throw new Error('自动更新已暂时禁用')
    }
    const win = BrowserWindow.fromWebContents(event.sender)

    // 监听下载进度
    autoUpdater.on('download-progress', (progress) => {
      win?.webContents.send('app:downloadProgress', progress.percent)
    })

    // 下载完成后自动安装
    autoUpdater.on('update-downloaded', () => {
      autoUpdater.quitAndInstall(false, true)
    })

    try {
      await autoUpdater.downloadUpdate()
    } catch (error) {
      console.error('下载更新失败:', error)
      throw error
    }
  })

  // 窗口控制
  ipcMain.on('window:minimize', (event) => {
    BrowserWindow.fromWebContents(event.sender)?.minimize()
  })

  ipcMain.on('window:maximize', (event) => {
    const win = BrowserWindow.fromWebContents(event.sender)
    if (win?.isMaximized()) {
      win.unmaximize()
    } else {
      win?.maximize()
    }
  })

  ipcMain.on('window:close', (event) => {
    BrowserWindow.fromWebContents(event.sender)?.close()
  })

  // 更新窗口控件主题色
  ipcMain.on('window:setTitleBarOverlay', (event, options: { symbolColor: string }) => {
    const win = BrowserWindow.fromWebContents(event.sender)
    if (win) {
      try {
        win.setTitleBarOverlay({
          color: '#00000000',
          symbolColor: options.symbolColor,
          height: 40
        })
      } catch (error) {
        console.warn('TitleBarOverlay not enabled for this window:', error)
      }
    }
  })

  // 数据库路径相关
  ipcMain.handle('dbpath:autoDetect', async () => {
    return dbPathService.autoDetect()
  })

  ipcMain.handle('dbpath:scanWxids', async (_, rootPath: string) => {
    return dbPathService.scanWxids(rootPath)
  })

  ipcMain.handle('dbpath:getDefault', async () => {
    return dbPathService.getDefaultPath()
  })

  // WCDB 数据库相关
  ipcMain.handle('wcdb:testConnection', async (_, dbPath: string, hexKey: string, wxid: string) => {
    return wcdbService.testConnection(dbPath, hexKey, wxid)
  })

  ipcMain.handle('wcdb:open', async (_, dbPath: string, hexKey: string, wxid: string) => {
    return wcdbService.open(dbPath, hexKey, wxid)
  })

  ipcMain.handle('wcdb:close', async () => {
    wcdbService.close()
    return true
  })



  // 聊天相关
  ipcMain.handle('chat:connect', async () => {
    return chatService.connect()
  })

  ipcMain.handle('chat:getSessions', async () => {
    return chatService.getSessions()
  })

  ipcMain.handle('chat:enrichSessionsContactInfo', async (_, usernames: string[]) => {
    return chatService.enrichSessionsContactInfo(usernames)
  })

  ipcMain.handle('chat:getMessages', async (_, sessionId: string, offset?: number, limit?: number) => {
    return chatService.getMessages(sessionId, offset, limit)
  })

  ipcMain.handle('chat:getLatestMessages', async (_, sessionId: string, limit?: number) => {
    return chatService.getLatestMessages(sessionId, limit)
  })

  ipcMain.handle('chat:getContact', async (_, username: string) => {
    return chatService.getContact(username)
  })

  ipcMain.handle('chat:getContactAvatar', async (_, username: string) => {
    return chatService.getContactAvatar(username)
  })

  ipcMain.handle('chat:getCachedMessages', async (_, sessionId: string) => {
    return chatService.getCachedSessionMessages(sessionId)
  })

  ipcMain.handle('chat:getMyAvatarUrl', async () => {
    return chatService.getMyAvatarUrl()
  })

  ipcMain.handle('chat:downloadEmoji', async (_, cdnUrl: string, md5?: string) => {
    return chatService.downloadEmoji(cdnUrl, md5)
  })

  ipcMain.handle('chat:close', async () => {
    chatService.close()
    return true
  })

  ipcMain.handle('chat:getSessionDetail', async (_, sessionId: string) => {
    return chatService.getSessionDetail(sessionId)
  })

  ipcMain.handle('chat:getImageData', async (_, sessionId: string, msgId: string) => {
    return chatService.getImageData(sessionId, msgId)
  })

  ipcMain.handle('chat:getVoiceData', async (_, sessionId: string, msgId: string) => {
    return chatService.getVoiceData(sessionId, msgId)
  })

  ipcMain.handle('chat:getMessageById', async (_, sessionId: string, localId: number) => {
    return chatService.getMessageById(sessionId, localId)
  })

  // 私聊克隆


  ipcMain.handle('image:decrypt', async (_, payload: { sessionId?: string; imageMd5?: string; imageDatName?: string; force?: boolean }) => {
    return imageDecryptService.decryptImage(payload)
  })
  ipcMain.handle('image:resolveCache', async (_, payload: { sessionId?: string; imageMd5?: string; imageDatName?: string }) => {
    return imageDecryptService.resolveCachedImage(payload)
  })
  ipcMain.handle('image:preload', async (_, payloads: Array<{ sessionId?: string; imageMd5?: string; imageDatName?: string }>) => {
    imagePreloadService.enqueue(payloads || [])
    return true
  })

  // 导出相关
  ipcMain.handle('export:exportSessions', async (_, sessionIds: string[], outputDir: string, options: ExportOptions) => {
    return exportService.exportSessions(sessionIds, outputDir, options)
  })

  ipcMain.handle('export:exportSession', async (_, sessionId: string, outputPath: string, options: ExportOptions) => {
    return exportService.exportSessionToChatLab(sessionId, outputPath, options)
  })

  // 数据分析相关
  ipcMain.handle('analytics:getOverallStatistics', async (_, force?: boolean) => {
    return analyticsService.getOverallStatistics(force)
  })

  ipcMain.handle('analytics:getContactRankings', async (_, limit?: number) => {
    return analyticsService.getContactRankings(limit)
  })

  ipcMain.handle('analytics:getTimeDistribution', async () => {
    return analyticsService.getTimeDistribution()
  })

  // 群聊分析相关
  ipcMain.handle('groupAnalytics:getGroupChats', async () => {
    return groupAnalyticsService.getGroupChats()
  })

  ipcMain.handle('groupAnalytics:getGroupMembers', async (_, chatroomId: string) => {
    return groupAnalyticsService.getGroupMembers(chatroomId)
  })

  ipcMain.handle('groupAnalytics:getGroupMessageRanking', async (_, chatroomId: string, limit?: number, startTime?: number, endTime?: number) => {
    return groupAnalyticsService.getGroupMessageRanking(chatroomId, limit, startTime, endTime)
  })

  ipcMain.handle('groupAnalytics:getGroupActiveHours', async (_, chatroomId: string, startTime?: number, endTime?: number) => {
    return groupAnalyticsService.getGroupActiveHours(chatroomId, startTime, endTime)
  })

  ipcMain.handle('groupAnalytics:getGroupMediaStats', async (_, chatroomId: string, startTime?: number, endTime?: number) => {
    return groupAnalyticsService.getGroupMediaStats(chatroomId, startTime, endTime)
  })

  // 打开协议窗口
  ipcMain.handle('window:openAgreementWindow', async () => {
    createAgreementWindow()
    return true
  })

  // 完成引导，关闭引导窗口并显示主窗口
  ipcMain.handle('window:completeOnboarding', async () => {
    try {
      configService?.set('onboardingDone', true)
    } catch (e) {
      console.error('保存引导完成状态失败:', e)
    }

    if (onboardingWindow && !onboardingWindow.isDestroyed()) {
      onboardingWindow.close()
    }
    showMainWindow()
    return true
  })

  // 重新打开首次引导窗口，并隐藏主窗口
  ipcMain.handle('window:openOnboardingWindow', async () => {
    shouldShowMain = false
    if (mainWindow && !mainWindow.isDestroyed()) {
      mainWindow.hide()
    }
    createOnboardingWindow()
    return true
  })

  // 年度报告相关
  ipcMain.handle('annualReport:getAvailableYears', async () => {
    const cfg = configService || new ConfigService()
    configService = cfg
    return annualReportService.getAvailableYears({
      dbPath: cfg.get('dbPath'),
      decryptKey: cfg.get('decryptKey'),
      wxid: cfg.get('myWxid')
    })
  })

  ipcMain.handle('annualReport:generateReport', async (_, year: number) => {
    const cfg = configService || new ConfigService()
    configService = cfg

    const dbPath = cfg.get('dbPath')
    const decryptKey = cfg.get('decryptKey')
    const wxid = cfg.get('myWxid')
    const logEnabled = cfg.get('logEnabled')

    const resourcesPath = app.isPackaged
      ? join(process.resourcesPath, 'resources')
      : join(app.getAppPath(), 'resources')
    const userDataPath = app.getPath('userData')

    const workerPath = join(__dirname, 'annualReportWorker.js')

    return await new Promise((resolve) => {
      const worker = new Worker(workerPath, {
        workerData: { year, dbPath, decryptKey, myWxid: wxid, resourcesPath, userDataPath, logEnabled }
      })

      const cleanup = () => {
        worker.removeAllListeners()
      }

      worker.on('message', (msg: any) => {
        if (msg && msg.type === 'annualReport:progress') {
          for (const win of BrowserWindow.getAllWindows()) {
            if (!win.isDestroyed()) {
              win.webContents.send('annualReport:progress', msg.data)
            }
          }
          return
        }
        if (msg && (msg.type === 'annualReport:result' || msg.type === 'done')) {
          cleanup()
          void worker.terminate()
          resolve(msg.data ?? msg.result)
          return
        }
        if (msg && (msg.type === 'annualReport:error' || msg.type === 'error')) {
          cleanup()
          void worker.terminate()
          resolve({ success: false, error: msg.error || '年度报告生成失败' })
        }
      })

      worker.on('error', (err) => {
        cleanup()
        resolve({ success: false, error: String(err) })
      })

      worker.on('exit', (code) => {
        if (code !== 0) {
          cleanup()
          resolve({ success: false, error: `年度报告线程异常退出: ${code}` })
        }
      })
    })
  })

  ipcMain.handle('annualReport:exportImages', async (_, payload: { baseDir: string; folderName: string; images: Array<{ name: string; dataUrl: string }> }) => {
    try {
      const { baseDir, folderName, images } = payload
      if (!baseDir || !folderName || !Array.isArray(images) || images.length === 0) {
        return { success: false, error: '导出参数无效' }
      }

      let targetDir = join(baseDir, folderName)
      if (existsSync(targetDir)) {
        let idx = 2
        while (existsSync(`${targetDir}_${idx}`)) idx++
        targetDir = `${targetDir}_${idx}`
      }

      await mkdir(targetDir, { recursive: true })

      for (const img of images) {
        const dataUrl = img.dataUrl || ''
        const commaIndex = dataUrl.indexOf(',')
        if (commaIndex <= 0) continue
        const base64 = dataUrl.slice(commaIndex + 1)
        const buffer = Buffer.from(base64, 'base64')
        const filePath = join(targetDir, img.name)
        await writeFile(filePath, buffer)
      }

      return { success: true, dir: targetDir }
    } catch (e) {
      return { success: false, error: String(e) }
    }
  })

  // 密钥获取
  ipcMain.handle('key:autoGetDbKey', async (event) => {
    return keyService.autoGetDbKey(60_000, (message, level) => {
      event.sender.send('key:dbKeyStatus', { message, level })
    })
  })

  ipcMain.handle('key:autoGetImageKey', async (event, manualDir?: string) => {
    return keyService.autoGetImageKey(manualDir, (message) => {
      event.sender.send('key:imageKeyStatus', { message })
    })
  })

}

// 主窗口引用
let mainWindow: BrowserWindow | null = null

// 启动时自动检测更新
function checkForUpdatesOnStartup() {
  if (!AUTO_UPDATE_ENABLED) return
  // 开发环境不检测更新
  if (process.env.VITE_DEV_SERVER_URL) return

  // 延迟3秒检测，等待窗口完全加载
  setTimeout(async () => {
    try {
      const result = await autoUpdater.checkForUpdates()
      if (result && result.updateInfo) {
        const currentVersion = app.getVersion()
        const latestVersion = result.updateInfo.version
        if (latestVersion !== currentVersion && mainWindow) {
          // 通知渲染进程有新版本
          mainWindow.webContents.send('app:updateAvailable', {
            version: latestVersion,
            releaseNotes: result.updateInfo.releaseNotes || ''
          })
        }
      }
    } catch (error) {
      console.error('启动时检查更新失败:', error)
    }
  }, 3000)
}

app.whenReady().then(() => {
  configService = new ConfigService()
  const candidateResources = app.isPackaged
    ? join(process.resourcesPath, 'resources')
    : join(app.getAppPath(), 'resources')
  const fallbackResources = join(process.cwd(), 'resources')
  const resourcesPath = existsSync(candidateResources) ? candidateResources : fallbackResources
  const userDataPath = app.getPath('userData')
  wcdbService.setPaths(resourcesPath, userDataPath)
  wcdbService.setLogEnabled(configService.get('logEnabled') === true)
  registerIpcHandlers()
  const onboardingDone = configService.get('onboardingDone')
  shouldShowMain = onboardingDone === true
  mainWindow = createWindow({ autoShow: shouldShowMain })

  if (!onboardingDone) {
    createOnboardingWindow()
  }

  // 启动时检测更新
  checkForUpdatesOnStartup()

  app.on('activate', () => {
    if (BrowserWindow.getAllWindows().length === 0) {
      mainWindow = createWindow()
    }
  })
})

app.on('window-all-closed', () => {
  if (process.platform !== 'darwin') {
    app.quit()
  }
})