/**
 * Zmodem IPC Handlers
 * 处理 rz/sz 文件传输
 */

import { ipcMain, IpcMainInvokeEvent, app, dialog } from 'electron'
import fs from 'fs'
import path from 'path'
import type { SSHService } from '../services/ssh-service'
import type { ZmodemService } from '../services/zmodem-service'
import { createLogger } from '../utils/logger'

const logger = createLogger('Zmodem_IPC')

// IPC channel names
export const ZMODEM_CHANNELS = {
  SEND: 'zmodem:send',
  RECEIVE: 'zmodem:receive',
  CANCEL: 'zmodem:cancel',
  PROGRESS: 'zmodem:progress',
  COMPLETE: 'zmodem:complete',
} as const

export interface ZmodemIPCOptions {
  sshService: SSHService
  zmodemService: ZmodemService
  mainWindowGetter: () => Electron.BrowserWindow | null
}

export function registerZmodemIPCHandlers(options: ZmodemIPCOptions): void {
  const { sshService, zmodemService, mainWindowGetter } = options

  // Zmodem send (rz) - send file to server
  ipcMain.handle(ZMODEM_CHANNELS.SEND, async (_event: IpcMainInvokeEvent, shellId: string) => {
    try {
      const mainWindow = mainWindowGetter()
      if (!mainWindow) {
        return { success: false, error: 'Window not available' }
      }

      // Open file dialog to select file
      const result = await dialog.showOpenDialog(mainWindow, {
        title: '选择要发送的文件',
        properties: ['openFile'],
      })

      if (result.canceled || !result.filePaths.length) {
        return { success: false, canceled: true }
      }

      const filePath = result.filePaths[0]
      const fileName = path.basename(filePath)

      // Read file
      const fileData = fs.readFileSync(filePath)

      // Get shell write function
      const shell = sshService.getShell(shellId)
      if (!shell) {
        return { success: false, error: 'Shell not found' }
      }

      // Send file via Zmodem protocol
      const sessionId = zmodemService.sendFile(
        shellId,
        fileName,
        fileData,
        (data) => {
          shell.channel.write(data)
        },
        (progress) => {
          mainWindow.webContents.send(ZMODEM_CHANNELS.PROGRESS, sessionId, progress)
        },
        (success, error) => {
          mainWindow.webContents.send(ZMODEM_CHANNELS.COMPLETE, sessionId, { success, error })
        }
      )

      return { success: true, sessionId, fileName }
    } catch (error: any) {
      logger.error('Zmodem send error:', error)
      return { success: false, error: error.message }
    }
  })

  // Zmodem receive (sz) - receive file from server
  ipcMain.handle(ZMODEM_CHANNELS.RECEIVE, async (_event: IpcMainInvokeEvent, shellId: string) => {
    try {
      const mainWindow = mainWindowGetter()
      if (!mainWindow) {
        return { success: false, error: 'Window not available' }
      }

      // Get shell to monitor for incoming data
      const shell = sshService.getShell(shellId)
      if (!shell) {
        return { success: false, error: 'Shell not found' }
      }

      // Open save dialog to select destination
      const result = await dialog.showSaveDialog(mainWindow, {
        title: '保存文件',
        defaultPath: app.getPath('downloads'),
      })

      if (result.canceled || !result.filePath) {
        return { success: false, canceled: true }
      }

      // Start Zmodem receive session
      const sessionId = zmodemService.receiveFile(
        shellId,
        result.filePath,
        (data) => {
          shell.channel.write(data)
        },
        (progress) => {
          mainWindow.webContents.send(ZMODEM_CHANNELS.PROGRESS, sessionId, progress)
        },
        (success, error) => {
          mainWindow.webContents.send(ZMODEM_CHANNELS.COMPLETE, sessionId, { success, error })
        }
      )

      return { success: true, sessionId }
    } catch (error: any) {
      logger.error('Zmodem receive error:', error)
      return { success: false, error: error.message }
    }
  })

  // Zmodem cancel transfer
  ipcMain.handle(ZMODEM_CHANNELS.CANCEL, async (_event: IpcMainInvokeEvent, sessionId: string) => {
    try {
      zmodemService.cancelSession(sessionId)
      return { success: true }
    } catch (error: any) {
      return { success: false, error: error.message }
    }
  })
}