// electron-updater is CommonJS with a lazy getter for `autoUpdater`, so a named
// ESM import fails at runtime under Node ESM (cjs-module-lexer can't detect it).
// Use the default interop import and access the instance lazily inside initUpdater
// (after app.whenReady), matching the original intended evaluation timing.
import electronUpdater from 'electron-updater'
import { BrowserWindow, ipcMain } from 'electron'

let mainWindow: BrowserWindow | null = null

export function initUpdater(win: BrowserWindow): void {
  mainWindow = win
  const autoUpdater = electronUpdater.autoUpdater

  // 检查更新
  ipcMain.handle('updater:check', async () => {
    try {
      const result = await autoUpdater.checkForUpdates()
      return result?.updateInfo ? { available: true, version: result.updateInfo.version } : { available: false }
    } catch {
      return { available: false }
    }
  })

  // 下载更新
  ipcMain.handle('updater:download', async () => {
    try {
      await autoUpdater.downloadUpdate()
      return { success: true }
    } catch (err: any) {
      return { success: false, error: err.message }
    }
  })

  // 安装更新
  ipcMain.handle('updater:install', () => {
    autoUpdater.quitAndInstall()
  })

  autoUpdater.autoDownload = false

  autoUpdater.on('checking-for-update', () => {
    mainWindow?.webContents.send('updater:status', { status: 'checking' })
  })

  autoUpdater.on('update-available', (info) => {
    mainWindow?.webContents.send('updater:status', {
      status: 'available',
      version: info.version,
      releaseNotes: info.releaseNotes,
    })
  })

  autoUpdater.on('update-not-available', () => {
    mainWindow?.webContents.send('updater:status', { status: 'not-available' })
  })

  autoUpdater.on('download-progress', (progress) => {
    mainWindow?.webContents.send('updater:status', {
      status: 'downloading',
      percent: progress.percent,
      transferred: progress.transferred,
      total: progress.total,
      bytesPerSecond: progress.bytesPerSecond,
    })
  })

  autoUpdater.on('update-downloaded', () => {
    mainWindow?.webContents.send('updater:status', { status: 'downloaded' })
  })

  autoUpdater.on('error', (err) => {
    mainWindow?.webContents.send('updater:status', { status: 'error', message: err.message })
  })
}