import { describe, it, expect, vi } from 'vitest'
import { ErrorCode } from '@d3ro/core/errors'
import { IPC_CHANNELS } from '@d3ro/core/ipc-channels'
import { getCloudSTTService } from '../../src/main/services/CloudSTTService'
import { getPremiumLLMService } from '../../src/main/services/PremiumLLMService'
import { getOnlineLLMService } from '../../src/main/services/OnlineLLMService'
import { getLocalLLMService } from '../../src/main/services/LocalLLMService'
import { configSet } from '../../src/main/services/ConfigService'
import { registerSTTHandlers } from '../../src/main/ipc/stt-handlers'
import { registerLLMHandlers } from '../../src/main/ipc/llm-handlers'
import { FX, USER_TEXT } from './fixtures'
import { invokeIpc, useRedHarness } from './harness'

const cloudPorts = {
  authenticated: true,
  invoke: async (
    _name: string,
    _body: Record<string, unknown>,
  ): Promise<{ data: unknown; error: { message: string } | null }> => ({
    data: null,
    error: { message: 'fx.default.unconfigured' },
  }),
}

vi.mock('../../src/main/services/CloudSyncService', () => ({
  getCloudSyncService: () => ({
    isEnabled: () => true,
    isAuthenticated: () => cloudPorts.authenticated,
    getAccessToken: async () => cloudPorts.authenticated ? 'fx.authenticated.jwt' : null,
    getSupabaseUrl: () => 'https://project.supabase.co',
    getAnonKey: () => 'fx-anon-key',
    invokeFunction: (name: string, body: Record<string, unknown>) => cloudPorts.invoke(name, body),
    signInAnonymously: async () => {
      throw new Error('fx.anon.not-supported')
    },
    pushOne: async () => undefined,
    getState: () => ({
      authenticated: cloudPorts.authenticated,
      userEmail: null,
      lastSyncAt: null,
      syncing: false,
    }),
  }),
  resetCloudSyncServiceForTests: () => undefined,
}))

useRedHarness()

describe('유스케이스: STT/LLM 모델 I/O 실패·빈값·기형 응답', () => {
  it('미인증 STT initialize 는 조용히 ready 가 되지 않고 이후 transcribe 가 실패한다', async () => {
    cloudPorts.authenticated = false
    await getCloudSTTService().initialize()
    await expect(
      getCloudSTTService().transcribe(Buffer.alloc(100)),
    ).rejects.toMatchObject({ code: ErrorCode.STTTranscriptionFailed })
  })

  it('STT 프록시 에러는 STTTranscriptionFailed 다', async () => {
    cloudPorts.authenticated = true
    vi.stubGlobal('fetch', vi.fn(async () => ({ ok: false, status: 503 })))
    await expect(getCloudSTTService().transcribe(Buffer.from('pcm'))).rejects.toMatchObject({
      code: ErrorCode.STTTranscriptionFailed,
    })
  })

  it('STT 빈 텍스트는 성공 객체가 아니라 에러다', async () => {
    cloudPorts.authenticated = true
    vi.stubGlobal('fetch', vi.fn(async () => ({
      ok: true,
      status: 200,
      json: async () => ({
        transcript: FX.STT_EMPTY,
        confidence: 0.9,
        language_code: 'ko',
        duration_seconds: 1,
        provider: 'fixture',
      }),
    })))
    await expect(getCloudSTTService().transcribe(Buffer.from('pcm'))).rejects.toMatchObject({
      code: ErrorCode.STTNoAudioData,
    })
  })

  it('STT 기형 페이로드(text 없음)는 파싱 실패다', async () => {
    cloudPorts.authenticated = true
    vi.stubGlobal('fetch', vi.fn(async () => ({
      ok: true,
      status: 200,
      json: async () => FX.STT_MALFORMED_SHAPE,
    })))
    await expect(getCloudSTTService().transcribe(Buffer.from('pcm'))).rejects.toMatchObject({
      code: ErrorCode.STTTranscriptionFailed,
    })
  })

  it('STT 정상 픽스처는 text 가 픽스처 토큰이다', async () => {
    cloudPorts.authenticated = true
    vi.stubGlobal('fetch', vi.fn(async () => ({
      ok: true,
      status: 200,
      json: async () => ({
        transcript: FX.STT_OK,
        confidence: 0.99,
        language_code: 'ko',
        duration_seconds: 1,
        provider: 'fixture',
      }),
    })))
    const result = await getCloudSTTService().transcribe(Buffer.from('pcm'))
    expect(result.text).toBe(FX.STT_OK)
    expect(result.text).not.toBe(USER_TEXT.KO)
  })

  it('미인증 PremiumLLM.processText 는 로그인 에러 + upgrade-required 다', async () => {
    cloudPorts.authenticated = false
    const llm = getPremiumLLMService()
    const events: unknown[] = []
    llm.on('upgrade-required', (e) => events.push(e))
    await expect(llm.processText(USER_TEXT.KO, 'refine')).rejects.toMatchObject({
      code: ErrorCode.LLMServerUnreachable,
    })
    expect(events.length).toBeGreaterThan(0)
  })

  it('PremiumLLM 프록시 에러는 원문을 반환하지 않는다', async () => {
    cloudPorts.authenticated = true
    cloudPorts.invoke = async () => ({ data: null, error: { message: 'fx.llm.500' } })
    await expect(getPremiumLLMService().processText(USER_TEXT.KO, 'refine')).rejects.toMatchObject({
      code: ErrorCode.LLMProcessingFailed,
    })
  })

  it('PremiumLLM 빈 content 는 원문 폴백이 아니라 에러다', async () => {
    cloudPorts.authenticated = true
    cloudPorts.invoke = async () => ({
      data: { content: [{ type: 'text', text: FX.LLM_EMPTY }] },
      error: null,
    })
    await expect(getPremiumLLMService().processText(USER_TEXT.KO, 'refine')).rejects.toMatchObject({
      code: ErrorCode.LLMProcessingFailed,
    })
  })

  it('PremiumLLM 기형 content 는 에러다', async () => {
    cloudPorts.authenticated = true
    cloudPorts.invoke = async () => ({ data: { content: [] }, error: null })
    await expect(getPremiumLLMService().processText(USER_TEXT.KO, 'refine')).rejects.toBeTruthy()
  })

  it('PremiumLLM 정상 픽스처는 입력과 다른 토큰이다', async () => {
    cloudPorts.authenticated = true
    cloudPorts.invoke = async () => ({
      data: { content: [{ type: 'text', text: FX.LLM_OK }] },
      error: null,
    })
    const out = await getPremiumLLMService().processText(USER_TEXT.KO, 'refine')
    expect(out).toBe(FX.LLM_OK)
    expect(out).not.toBe(USER_TEXT.KO)
  })

  it('쿼터 초과 메시지는 upgrade-required 를 낸다', async () => {
    cloudPorts.authenticated = true
    cloudPorts.invoke = async () => ({ data: null, error: { message: 'quota_exceeded 429' } })
    const llm = getPremiumLLMService()
    const ev: unknown[] = []
    llm.on('upgrade-required', (e) => ev.push(e))
    await expect(llm.processText('x', 'refine')).rejects.toBeTruthy()
    expect(ev.length).toBeGreaterThan(0)
  })

  it('generate() 가 공개 API 로 존재하고 픽스처를 반환한다', async () => {
    cloudPorts.authenticated = true
    cloudPorts.invoke = async () => ({
      data: { content: [{ type: 'text', text: FX.LLM_TITLE }] },
      error: null,
    })
    const llm = getPremiumLLMService() as { generate?: (t: string, o?: unknown) => Promise<{ text: string }> }
    expect(typeof llm.generate).toBe('function')
    const result = await llm.generate!(USER_TEXT.KO, { systemPrompt: 'title' })
    expect(result.text).toBe(FX.LLM_TITLE)
  })

  it('IPC llm:process 실패는 success:false 다', async () => {
    cloudPorts.authenticated = false
    configSet('llmBackend', 'premium')
    registerLLMHandlers()
    const res = await invokeIpc(IPC_CHANNELS.LLM.PROCESS, {
      text: USER_TEXT.KO,
      action: 'refine',
    })
    expect(res.success).toBe(false)
    if (!res.success) expect(res.error.code).toBe(ErrorCode.LLMProcessingFailed)
  })

  it('IPC llm:process online + 미로그인은 실패다', async () => {
    configSet('llmBackend', 'online')
    configSet('authToken', null)
    registerLLMHandlers()
    const res = await invokeIpc(IPC_CHANNELS.LLM.PROCESS, {
      text: USER_TEXT.KO,
      action: 'refine',
    })
    expect(res.success).toBe(false)
  })

  it('IPC premium getStatus 는 실제 가용 여부를 반영한다 (항상 true 금지)', async () => {
    cloudPorts.authenticated = false
    registerLLMHandlers()
    const res = await invokeIpc(IPC_CHANNELS.LLM.PREMIUM_GET_STATUS)
    expect(res.success).toBe(true)
    if (res.success) expect(res.data.isAvailable).toBe(false)
  })

  it('IPC premium getQuota 는 하드코딩 999999 이 아니다', async () => {
    registerLLMHandlers()
    const res = await invokeIpc(IPC_CHANNELS.LLM.PREMIUM_GET_QUOTA)
    expect(res.success).toBe(true)
    if (res.success) {
      expect(res.data.remainingTokens).not.toBe(999999)
    }
  })

  it('IPC stt:setLanguage / getLanguage 왕복', async () => {
    registerSTTHandlers()
    await invokeIpc(IPC_CHANNELS.STT.SET_LANGUAGE, { language: 'en' })
    const res = await invokeIpc(IPC_CHANNELS.STT.GET_LANGUAGE)
    expect(res.success).toBe(true)
    if (res.success) expect(res.data).toBe('en')
  })

  it('IPC llm:setModel / getActiveModel 왕복', async () => {
    registerLLMHandlers()
    await invokeIpc(IPC_CHANNELS.LLM.SET_MODEL, { modelId: 'fx-model-id' })
    const res = await invokeIpc(IPC_CHANNELS.LLM.GET_ACTIVE_MODEL)
    expect(res.success).toBe(true)
    if (res.success) expect(res.data).toBe('fx-model-id')
  })

  it('IPC llm:getStatus 는 LocalLLM.getStatus() 와 같고 하드코딩 ready 가 아니다', async () => {
    registerLLMHandlers()
    const live = getLocalLLMService().getStatus()
    const res = await invokeIpc(IPC_CHANNELS.LLM.GET_STATUS)
    expect(res.success).toBe(true)
    if (res.success) {
      expect(res.data).toEqual(live)
      expect(res.data).not.toMatchObject({
        isInstalled: true,
        isRunning: true,
        isReady: true,
        currentModel: 'premium',
      })
      expect(live.connectionState === 'disconnected' || live.connectionState === 'connected').toBe(true)
    }
  })

  it('IPC llm:pullModel 실패는 성공으로 위장하지 않는다', async () => {
    registerLLMHandlers()
    const res = await invokeIpc(IPC_CHANNELS.LLM.PULL_MODEL, { modelId: 'fx-missing-model' })
    expect(res.success).toBe(false)
    if (!res.success) expect(res.error.code).toBe(ErrorCode.LLMServerUnreachable)
  })

  it('OnlineLLM 5xx 는 LLMProcessingFailed 다', async () => {
    configSet('authToken', FX.AUTH_TOKEN)
    vi.stubGlobal(
      'fetch',
      vi.fn(async () => ({ ok: false, status: 503, json: async () => ({}) })),
    )
    await expect(getOnlineLLMService().processText('x', 'refine')).rejects.toMatchObject({
      code: ErrorCode.LLMProcessingFailed,
    })
  })
})