// tests/main/services/VoiceModeService.test.ts
// 상태 머신 전이 + 이중 조건 플러시 + accidentalPress 테스트

import { describe, it, expect, beforeEach, vi } from 'vitest'
import { EventEmitter } from 'events'
import { RecognitionState, AudioState } from '@d3ro/core/types'
import { TIMING } from '@d3ro/core/constants'

// 모든 하위 서비스 모킹
vi.mock('../../../src/main/services/LoggerService', () => ({
  getLogger: () => ({
    info: vi.fn(),
    warn: vi.fn(),
    error: vi.fn(),
    debug: vi.fn()
  })
}))

const mockSTT = {
  initialize: vi.fn(() => Promise.resolve()),
  transcribe: vi.fn(() =>
    Promise.resolve({ text: '테스트 전사', segments: [], language: 'ko', duration: 2, processingTime: 500 })
  ),
  getStatus: vi.fn(() => ({ state: 'ready', modelId: 'base', uptime: 0 })),
  // 프리플라이트 검증(모델 설치 여부)용 — 기본은 설치된 상태로 목킹
  getModels: vi.fn(() => [
    { id: 'base', name: 'Base', sizeBytes: 0, downloaded: true, languages: [], accuracy: 2, speed: 4 },
  ]),
  on: vi.fn(),
  off: vi.fn()
}

vi.mock('../../../src/main/services/LocalSTTService', () => ({
  getLocalSTTService: () => mockSTT,
  resetLocalSTTServiceForTests: () => undefined,
}))

const audioBus = new EventEmitter()
const mockAudio = {
  start: vi.fn(() => Promise.resolve()),
  stop: vi.fn(() => Promise.resolve()),
  on: vi.fn((ev: string, fn: (...args: unknown[]) => void) => {
    audioBus.on(ev, fn)
  }),
  off: vi.fn((ev: string, fn: (...args: unknown[]) => void) => {
    audioBus.off(ev, fn)
  }),
}

vi.mock('../../../src/main/services/AudioCaptureService', () => ({
  getAudioCaptureService: () => mockAudio
}))

const mockKeyBinding = {
  on: vi.fn(),
  off: vi.fn()
}

vi.mock('../../../src/main/services/KeyBindingService', () => ({
  getKeyBindingService: () => mockKeyBinding
}))

const CONFIG_DEFAULTS: Record<string, unknown> = {
  sttModelId: 'base',
  defaultLLMAction: 'refine',
  ollamaServerUrl: 'http://localhost:11434',
  llmModelId: 'gemma4:e4b'
}

const config = vi.hoisted(() => ({ values: {} as Record<string, unknown> }))

vi.mock('../../../src/main/services/ConfigService', () => ({
  configGet: vi.fn((key: string) => config.values[key])
}))

const instructionStore = vi.hoisted(() => ({
  byId: {} as Record<string, { id: string; name: string; prompt: string }>
}))

vi.mock('../../../src/main/services/CustomInstructionService', () => ({
  getCustomInstructionService: () => ({
    getById: (id: string) => instructionStore.byId[id] ?? null
  })
}))

// 음성 단축키(두 번째 진입점) — 기본은 비활성
const voiceCommand = vi.hoisted(() => ({
  enabled: false,
  instructionId: null as string | null,
  cleanedText: ''
}))

vi.mock('../../../src/main/services/VoiceCommandService', () => ({
  getVoiceCommandService: () => ({
    isEnabled: () => voiceCommand.enabled,
    match: (text: string) =>
      voiceCommand.enabled && voiceCommand.instructionId
        ? {
            matched: true,
            ruleId: 'rule-1',
            instructionId: voiceCommand.instructionId,
            cleanedText: voiceCommand.cleanedText || text,
            matchedKeyword: '번역'
          }
        : { matched: false, ruleId: null, instructionId: null, cleanedText: text, matchedKeyword: null }
  })
}))

const mockTextInsert = {
  insertText: vi.fn(() => Promise.resolve({ success: true, method: 'clipboard', textLength: 10, durationMs: 50 }))
}

vi.mock('../../../src/main/services/TextInsertService', () => ({
  getTextInsertService: () => mockTextInsert
}))

const mockLLM = {
  isAvailable: vi.fn(() => false),
  processText: vi.fn(() => Promise.resolve('다듬어진 텍스트')),
  on: vi.fn(),
  off: vi.fn()
}

vi.mock('../../../src/main/services/LocalLLMService', () => ({
  getLocalLLMService: () => mockLLM
}))

let getVoiceModeService: () => ReturnType<typeof import('../../../src/main/services/VoiceModeService')['getVoiceModeService']>

beforeEach(async () => {
  vi.resetModules()
  vi.clearAllMocks()
  audioBus.removeAllListeners()
  config.values = { ...CONFIG_DEFAULTS }
  instructionStore.byId = {}
  voiceCommand.enabled = false
  voiceCommand.instructionId = null
  voiceCommand.cleanedText = ''
  mockSTT.initialize.mockResolvedValue(undefined as never)
  mockSTT.transcribe.mockResolvedValue({
    text: '테스트 전사',
    segments: [],
    language: 'ko',
    duration: 2,
    processingTime: 500,
  } as never)
  mockLLM.processText.mockResolvedValue('다듬어진 텍스트' as never)
  const mod = await import('../../../src/main/services/VoiceModeService')
  mod.resetVoiceModeServiceForTests()
  getVoiceModeService = mod.getVoiceModeService
})

describe('VoiceModeService', () => {
  describe('상태 머신', () => {
    it('초기 상태는 IDLE이다', () => {
      const svc = getVoiceModeService()
      const state = svc.getState()

      expect(state.recognitionState).toBe(RecognitionState.IDLE)
      expect(state.audioState).toBe(AudioState.IDLE)
      expect(state.sessionId).toBeNull()
    })

    it('startSession 호출 시 PREPARING으로 전이한다', async () => {
      const svc = getVoiceModeService()
      const stateChanges: RecognitionState[] = []

      svc.on('recognition-state-changed', (payload: { current: RecognitionState }) => {
        stateChanges.push(payload.current)
      })

      await svc.startSession('dictation')

      // PREPARING → CONNECTING → READY 순서
      expect(stateChanges[0]).toBe(RecognitionState.PREPARING)
      expect(stateChanges).toContain(RecognitionState.CONNECTING)
    })

    it('isActive는 세션이 활성일 때 true이다', async () => {
      const svc = getVoiceModeService()
      expect(svc.isActive).toBe(false)

      // startSession은 완전 비동기이므로 await 후 세션 활성 확인
      await svc.startSession('dictation')
      expect(svc.isActive).toBe(true)
    })
  })

  describe('accidentalPress', () => {
    it('700ms 미만 세션은 자동 취소된다', async () => {
      const svc = getVoiceModeService()
      let cancelReason: string | null = null

      svc.on('session-cancelled', (payload: { reason: string }) => {
        cancelReason = payload.reason
      })

      // 세션 시작 즉시 종료 (700ms 미만)
      await svc.startSession('dictation')
      await svc.stopSession()

      expect(cancelReason).toBe('too-short')
    })
  })

  describe('STT 준비 대기', () => {
    it('전사가 시작된 뒤에는 readiness timeout 으로 세션을 취소하지 않는다', async () => {
      let resolveInit: (() => void) | undefined
      mockSTT.initialize.mockImplementation(
        () =>
          new Promise<void>((resolve) => {
            resolveInit = resolve
          }),
      )
      mockSTT.transcribe.mockResolvedValue({
        text: '안녕하세요',
        segments: [],
        language: 'ko',
        duration: 2,
        processingTime: 50,
      } as never)

      const svc = getVoiceModeService()
      let cancelReason: string | null = null
      let completed = false
      svc.on('session-cancelled', (payload: { reason: string }) => {
        cancelReason = payload.reason
      })
      const completedPromise = new Promise<void>((resolve) => {
        svc.once('session-completed', () => {
          completed = true
          resolve()
        })
      })

      await svc.startSession('dictation')
      audioBus.emit('audio-data', { buffer: Buffer.alloc(16000 * 2) })
      await new Promise((r) => setTimeout(r, 850))
      await svc.stopSession()

      resolveInit?.()
      await Promise.race([completedPromise, new Promise((r) => setTimeout(r, 1000))])

      expect(cancelReason).not.toBe('timeout')
      expect(completed).toBe(true)
    })
  })

  describe('cancelSession', () => {
    it('user 취소로 세션을 종료한다', async () => {
      const svc = getVoiceModeService()
      let cancelReason: string | null = null

      svc.on('session-cancelled', (payload: { reason: string }) => {
        cancelReason = payload.reason
      })

      await svc.startSession('dictation')
      svc.cancelSession()

      expect(cancelReason).toBe('user')
    })
  })

  describe('LLM 후처리 인자 전달', () => {
    const TRANSCRIPT = '회의 끝나고 배포하자'

    /** 한 세션을 끝까지 돌린다. */
    async function runSession(): Promise<void> {
      mockSTT.transcribe.mockResolvedValue({
        text: TRANSCRIPT,
        segments: [],
        language: 'ko',
        duration: 2,
        processingTime: 50,
      } as never)

      const svc = getVoiceModeService()
      const settled = new Promise<void>((resolve) => {
        svc.once('session-completed', () => resolve())
        svc.once('session-cancelled', () => resolve())
      })

      await svc.startSession('dictation')
      audioBus.emit('audio-data', { buffer: Buffer.alloc(16000 * 2) })
      await new Promise((r) => setTimeout(r, 850))
      await svc.stopSession()
      await Promise.race([settled, new Promise((r) => setTimeout(r, 2000))])
    }

    function registerInstruction(inst: { id: string; name: string; prompt: string }): void {
      instructionStore.byId[inst.id] = inst
    }

    // ── 고친 경로: 커스텀 지시문 ───────────────────────────
    describe('커스텀 지시문 경로 (고친 경로)', () => {
      it('{{text}} 없는 지시문은 시스템 프롬프트로, 전사 텍스트는 처리 대상으로 전달한다', async () => {
        registerInstruction({
          id: 'builtin-summarize',
          name: '요약',
          prompt: '다음 텍스트의 핵심 내용을 3줄 이내로 요약해주세요.\n요약문만 출력하세요.',
        })
        config.values.defaultLLMAction = 'custom'
        config.values.activeInstructionId = 'builtin-summarize'

        await runSession()

        expect(mockLLM.processText).toHaveBeenCalledTimes(1)
        const [text, action, targetLanguage, systemPrompt] = mockLLM.processText.mock.calls[0]

        expect(text).toBe(TRANSCRIPT)
        expect(action).toBe('custom')
        expect(targetLanguage).toBeUndefined()
        expect(systemPrompt).toBe(
          '다음 텍스트의 핵심 내용을 3줄 이내로 요약해주세요.\n요약문만 출력하세요.',
        )
      })

      it('builtin-translate의 {{targetLanguage}}를 치환해 시스템 프롬프트로 전달한다', async () => {
        registerInstruction({
          id: 'builtin-translate',
          name: '번역',
          prompt:
            '다음 텍스트를 {{targetLanguage}}로 번역해주세요.\n자연스럽고 정확한 번역만 출력하세요.',
        })
        config.values.defaultLLMAction = 'custom'
        config.values.activeInstructionId = 'builtin-translate'

        await runSession()
        const [text, , , systemPrompt] = mockLLM.processText.mock.calls[0]

        expect(text).toBe(TRANSCRIPT)
        expect(systemPrompt).toContain('English로 번역')
        expect(systemPrompt).not.toContain('{{')
      })

      it('builtin-free-prompt의 {{userPrompt}}를 전사 텍스트로 치환한다', async () => {
        registerInstruction({
          id: 'builtin-free-prompt',
          name: '자유 프롬프트',
          prompt: '{{userPrompt}}',
        })
        config.values.defaultLLMAction = 'custom'
        config.values.activeInstructionId = 'builtin-free-prompt'

        await runSession()
        const [text, , , systemPrompt] = mockLLM.processText.mock.calls[0]

        expect(text).toBe(TRANSCRIPT)
        expect(systemPrompt).toBe(TRANSCRIPT)
      })

      it('{{text}}를 쓰는 사용자 정의 지시문은 치환 결과를 처리 대상 텍스트로 넘긴다', async () => {
        registerInstruction({
          id: 'user-bullets',
          name: '불릿 정리',
          prompt: '아래 내용을 불릿으로 정리해줘:\n{{text}}',
        })
        config.values.defaultLLMAction = 'custom'
        config.values.activeInstructionId = 'user-bullets'

        await runSession()
        const [text, action, , systemPrompt] = mockLLM.processText.mock.calls[0]

        expect(text).toBe(`아래 내용을 불릿으로 정리해줘:\n${TRANSCRIPT}`)
        expect(action).toBe('custom')
        expect(systemPrompt).toBeUndefined()
      })

      it('지시문을 찾지 못하면 전사 텍스트만 전달한다', async () => {
        config.values.defaultLLMAction = 'custom'
        config.values.activeInstructionId = 'does-not-exist'

        await runSession()
        const [text, action, , systemPrompt] = mockLLM.processText.mock.calls[0]

        expect(text).toBe(TRANSCRIPT)
        expect(action).toBe('custom')
        expect(systemPrompt).toBeUndefined()
      })
    })

    // ── 두 번째 진입점: 음성 단축키 ────────────────────────
    describe('음성 단축키 진입점 (overrideInstructionId)', () => {
      it('음성 명령으로 지목된 지시문도 시스템 프롬프트로 전달한다', async () => {
        registerInstruction({
          id: 'builtin-translate',
          name: '번역',
          prompt: '다음 텍스트를 {{targetLanguage}}로 번역해주세요.',
        })
        voiceCommand.enabled = true
        voiceCommand.instructionId = 'builtin-translate'
        voiceCommand.cleanedText = '회의 끝나고 배포하자'
        config.values.defaultLLMAction = 'refine'

        await runSession()
        const [text, action, , systemPrompt] = mockLLM.processText.mock.calls[0]

        expect(text).toBe(TRANSCRIPT)
        expect(action).toBe('custom')
        expect(systemPrompt).toBe('다음 텍스트를 English로 번역해주세요.')
      })

      it("defaultLLMAction이 'none'이어도 음성 명령은 스킵되지 않는다", async () => {
        registerInstruction({
          id: 'builtin-summarize',
          name: '요약',
          prompt: '다음 텍스트의 핵심 내용을 3줄 이내로 요약해주세요.',
        })
        voiceCommand.enabled = true
        voiceCommand.instructionId = 'builtin-summarize'
        config.values.defaultLLMAction = 'none'

        await runSession()

        expect(mockLLM.processText).toHaveBeenCalledTimes(1)
        const [text, action, , systemPrompt] = mockLLM.processText.mock.calls[0]

        expect(text).toBe(TRANSCRIPT)
        expect(action).toBe('custom')
        expect(systemPrompt).toBe('다음 텍스트의 핵심 내용을 3줄 이내로 요약해주세요.')
      })

      it("음성 명령이 없으면 'none'은 기존대로 LLM을 건너뛴다", async () => {
        config.values.defaultLLMAction = 'none'

        await runSession()

        expect(mockLLM.processText).not.toHaveBeenCalled()
      })
    })

    // ── 안 고친 경로: 일반 액션이 원래 맞았고 계속 맞다 ────
    describe('일반 액션 경로 (수정 대상 아님 — 계속 정상이어야 한다)', () => {
      it.each(['refine', 'summarize', 'grammar', 'expand'])(
        "'%s' 액션은 전사 텍스트를 text로 넘기고 customPrompt를 넘기지 않는다",
        async (action) => {
          config.values.defaultLLMAction = action
          // 활성 지시문이 있어도 일반 액션 경로는 지시문을 타지 않아야 한다.
          registerInstruction({ id: 'builtin-summarize', name: '요약', prompt: '요약해줘' })
          config.values.activeInstructionId = 'builtin-summarize'

          await runSession()

          expect(mockLLM.processText).toHaveBeenCalledTimes(1)
          const [text, passedAction, targetLanguage, systemPrompt] =
            mockLLM.processText.mock.calls[0]

          expect(text).toBe(TRANSCRIPT)
          expect(passedAction).toBe(action)
          expect(targetLanguage).toBeUndefined()
          expect(systemPrompt).toBeUndefined()
        },
      )

      it("'translate' 액션은 대상 언어를 함께 넘긴다", async () => {
        config.values.defaultLLMAction = 'translate'

        await runSession()
        const [text, action, targetLanguage, systemPrompt] = mockLLM.processText.mock.calls[0]

        expect(text).toBe(TRANSCRIPT)
        expect(action).toBe('translate')
        expect(targetLanguage).toBe('English')
        expect(systemPrompt).toBeUndefined()
      })
    })
  })

  describe('getState', () => {
    it('현재 상태를 VoiceState 형태로 반환한다', () => {
      const svc = getVoiceModeService()
      const state = svc.getState()

      expect(state).toHaveProperty('recognitionState')
      expect(state).toHaveProperty('audioState')
      expect(state).toHaveProperty('mode')
      expect(state).toHaveProperty('sessionId')
      expect(state).toHaveProperty('recordingStartedAt')
    })
  })

  describe('터미널 상태', () => {
    it('cancelSession 후 _resetToIdle의 200ms 딜레이 후 IDLE로 전이한다', async () => {
      vi.useFakeTimers()
      const svc = getVoiceModeService()

      await svc.startSession('dictation')
      svc.cancelSession()

      // 200ms 딜레이로 IDLE 전이 예약됨
      vi.advanceTimersByTime(250)

      const state = svc.getState()
      expect(state.recognitionState).toBe(RecognitionState.IDLE)

      vi.useRealTimers()
    })
  })
})

describe('TIMING 상수', () => {
  it('핵심 타이밍 값이 Speakly 패턴과 일치한다', () => {
    expect(TIMING.MIN_AUDIO_DURATION).toBe(700)
    expect(TIMING.DOUBLE_PRESS_DURATION).toBe(300)
    expect(TIMING.POST_RECORDING_WAIT).toBe(4000)
    expect(TIMING.POST_RECORDING_WAIT_BUFFERED).toBe(6000)
    expect(TIMING.ABSOLUTE_MAX_WAIT).toBe(120000)
    expect(TIMING.AUDIO_LEVEL_INTERVAL).toBe(100)
  })
})