// src/main/ipc/voice-handlers.ts

import { ipcMain } from 'electron'
import { IPC_CHANNELS } from '@d3ro/core/ipc-channels'
import { ipcSuccess, ipcError, ErrorCode } from '@d3ro/core/errors'
import { getVoiceModeService } from '../services/VoiceModeService'
import { getMainWindow } from '../windows/WindowManager'
import type { StartRecordingParams, StopRecordingParams, CancelRecordingParams, SetVoiceModeParams, VoiceErrorEvent } from '@d3ro/core/types'

function safeSendToRenderer(channel: string, data: unknown): void {
  const win = getMainWindow()
  if (win && !win.isDestroyed()) {
    win.webContents.send(channel, data)
  }
}

export function registerVoiceHandlers(): void {
  // 음성 세션 에러/경고를 메인 윈도우로 브로드캐스트 —
  // 모델 미설치/엔진 실패 등의 경고가 recording tip(3초) 외에도
  // 메인 UI에서 명확히 보이도록 (설계서 02 voice:error 이벤트)
  getVoiceModeService().on('error', (payload) => {
    const event: VoiceErrorEvent = {
      sessionId: payload.session?.id ?? null,
      errorCode: payload.error.code,
      message: payload.error.message,
      severity: payload.severity ?? 'error',
    }
    safeSendToRenderer(IPC_CHANNELS.VOICE.ERROR, event)
  })

  ipcMain.handle(IPC_CHANNELS.VOICE.START_RECORDING, async (_event, params: StartRecordingParams) => {
    try {
      const voice = getVoiceModeService()
      await voice.startSession('dictation')
      const session = voice.currentSession
      return ipcSuccess({ sessionId: session?.id ?? params.sessionId ?? '' })
    } catch (error) {
      const message = error instanceof Error ? error.message : String(error)
      return ipcError(ErrorCode.AudioCaptureStartFailed, `Failed to start recording: ${message}`)
    }
  })

  ipcMain.handle(IPC_CHANNELS.VOICE.STOP_RECORDING, async (_event, params: StopRecordingParams) => {
    try {
      const voice = getVoiceModeService()
      await voice.stopSession()
      return ipcSuccess({
        sessionId: params.sessionId,
        text: voice.currentSession?.transcription ?? '',
        durationMs: voice.currentSession ? Date.now() - voice.currentSession.startedAt : 0
      })
    } catch (error) {
      const message = error instanceof Error ? error.message : String(error)
      return ipcError(ErrorCode.STTTranscriptionFailed, `Failed to stop recording: ${message}`)
    }
  })

  ipcMain.handle(IPC_CHANNELS.VOICE.CANCEL_RECORDING, async (_event, _params: CancelRecordingParams) => {
    getVoiceModeService().cancelSession()
    return ipcSuccess(undefined)
  })

  ipcMain.handle(IPC_CHANNELS.VOICE.GET_STATE, async () => {
    return ipcSuccess(getVoiceModeService().getState())
  })

  ipcMain.handle(IPC_CHANNELS.VOICE.SET_MODE, async (_event, params: SetVoiceModeParams) => {
    // Phase 2: 모드만 설정에 저장 (실제 모드 전환은 핫키에서 처리)
    return ipcSuccess(undefined)
  })

  ipcMain.handle(IPC_CHANNELS.VOICE.GET_MODE, async () => {
    const voice = getVoiceModeService()
    return ipcSuccess(voice.currentSession?.mode ?? 'dictation')
  })
}