import { beforeEach, describe, expect, it, vi } from 'vitest'

const { chatState, getGroupSnapshotAsync, listContactsAsync, listMessagesAsync, knowledgeService } =
  vi.hoisted(() => ({
    chatState: {
      ready: false,
      accountId: ''
    },
    getGroupSnapshotAsync: vi.fn(),
    listContactsAsync: vi.fn(),
    listMessagesAsync: vi.fn(),
    knowledgeService: {
      dispose: vi.fn().mockResolvedValue(undefined),
      index: vi.fn().mockResolvedValue(undefined),
      search: vi.fn(),
      status: vi.fn().mockResolvedValue({
        accountId: 'fixture-account',
        state: 'ready',
        indexedMessageCount: 1,
        indexedChunkCount: 1,
        sourceMessageCount: 1,
        processedMessages: 1,
        totalMessages: 1,
        estimatedRemainingMs: null,
        databaseBytes: 0,
        walBytes: 0,
        shmBytes: 0
      })
    }
  }))

vi.mock('../../src/main/services/chat-service', () => ({
  isReady: () => chatState.ready,
  getSelfAccountInfo: () => (chatState.accountId ? { wxid: chatState.accountId } : null),
  getCurrentAccountRoot: () => chatState.accountId,
  getGroupSnapshotAsync,
  listContactsAsync,
  listMessagesAsync
}))

vi.mock('../../src/main/knowledge/knowledge-service', () => ({
  KnowledgeService: class {
    dispose = knowledgeService.dispose
    index = knowledgeService.index
    search = knowledgeService.search
    status = knowledgeService.status
  }
}))

import { KnowledgeSearchService } from '../../src/main/knowledge/knowledge-search-service'
import type { VoiceTranscriptUpdate } from '../../src/shared/voice-recognition'

describe('KnowledgeSearchService legacy fallback', () => {
  beforeEach(() => {
    chatState.ready = false
    chatState.accountId = ''
    getGroupSnapshotAsync.mockReset()
    listContactsAsync.mockReset()
    listMessagesAsync.mockReset()
    knowledgeService.dispose.mockClear()
    knowledgeService.index.mockClear()
    knowledgeService.search.mockReset()
    knowledgeService.status.mockClear()
    listContactsAsync.mockResolvedValue([
      {
        m_nsUsrName: 'fixture-contact',
        m_nsNickName: '脱敏会话',
        md5: 'fixture-conversation',
        type: 'user'
      }
    ])
    listMessagesAsync.mockResolvedValue([
      {
        id: 'fixture-message',
        localId: 42,
        from: 'user',
        type: '普通文本',
        datetime: '2026/8/5 10:00:00',
        content: '请把 Knowledge Worker 的 fallback 保留下来。',
        isSender: false,
        senderId: 'fixture-sender',
        name: '脱敏成员',
        createTime: 1785895200
      }
    ])
    getGroupSnapshotAsync.mockResolvedValue(null)
  })

  it('keeps the old main-process search path when Knowledge is unavailable', async () => {
    const service = new KnowledgeSearchService('/tmp/wxe-knowledge-fallback', '/missing-worker.js')
    const result = await service.search({
      text: 'Knowledge Worker fallback',
      terms: ['Knowledge Worker', 'fallback'],
      conversationIds: ['fixture-conversation'],
      startTime: 1785800000,
      limit: 10
    })
    expect(listMessagesAsync).toHaveBeenCalledWith('fixture-conversation', 1785800000, undefined)
    expect(result).toMatchObject({
      source: 'fallback',
      fallbackReason: 'unavailable',
      state: 'unavailable',
      totalMessages: 1
    })
    expect(result.evidence).toEqual([
      expect.objectContaining({
        messageId: 'local:42',
        conversationId: 'fixture-conversation',
        sender: '脱敏成员',
        senderId: 'fixture-sender',
        timestamp: 1785895200000
      })
    ])
    await service.dispose()
  })

  it('hydrates a cached voice transcript and incrementally indexes only its conversation', async () => {
    chatState.ready = true
    chatState.accountId = 'C:/fixtures/account-a'
    listContactsAsync.mockResolvedValue([
      {
        m_nsUsrName: 'voice-contact',
        m_nsNickName: '语音测试会话',
        md5: 'voice-conversation',
        type: 'user'
      }
    ])
    listMessagesAsync.mockResolvedValue([
      {
        id: 'voice-message',
        localId: 18,
        from: 'user',
        type: '语音',
        content: '[语音消息]',
        isSender: false,
        senderId: 'fixture-sender',
        name: '脱敏成员',
        sessionId: 'voice-contact',
        createTime: 1_785_895_200
      }
    ])
    const { voiceAccountIdentity, voiceMessageIdentity } = await import(
      '../../src/main/voice-pipeline/voice-message-identity'
    )
    const reference = {
      sessionId: 'voice-contact',
      localId: 18,
      createTime: 1_785_895_200
    }
    const service = new KnowledgeSearchService('/tmp/wxe-knowledge-fallback', '/missing-worker.js')
    service.setVoiceTranscriptResolver(() => ({ state: 'transcribed', transcript: '缓存中的语音文字' }))

    await service.indexVoiceTranscript({
      accountIdentity: voiceAccountIdentity(chatState.accountId),
      reference,
      messageIdentity: voiceMessageIdentity(reference),
      state: 'transcribed',
      transcript: '缓存中的语音文字',
      cached: true
    })

    expect(knowledgeService.index).toHaveBeenCalledWith(
      expect.objectContaining({
        accountId: chatState.accountId,
        conversations: [
          expect.objectContaining({
            conversationId: 'voice-conversation',
            completeSnapshot: true,
            messages: [
              expect.objectContaining({
                kind: 'voice',
                voiceTranscript: '缓存中的语音文字',
                voiceTranscriptState: 'transcribed'
              })
            ]
          })
        ]
      })
    )
    await service.dispose()
  })

  it('coalesces consecutive voice updates for the same conversation', async () => {
    chatState.ready = true
    chatState.accountId = 'C:/fixtures/account-a'
    listContactsAsync.mockResolvedValue([
      {
        m_nsUsrName: 'voice-contact',
        m_nsNickName: '语音测试会话',
        md5: 'voice-conversation',
        type: 'user'
      }
    ])
    listMessagesAsync.mockResolvedValue([
      {
        id: 'voice-message-1',
        localId: 18,
        from: 'user',
        type: '语音',
        content: '[语音消息]',
        isSender: false,
        sessionId: 'voice-contact',
        createTime: 1_785_895_200
      },
      {
        id: 'voice-message-2',
        localId: 19,
        from: 'user',
        type: '语音',
        content: '[语音消息]',
        isSender: false,
        sessionId: 'voice-contact',
        createTime: 1_785_895_201
      }
    ])
    let releaseFirstIndex: (() => void) | undefined
    knowledgeService.index.mockImplementationOnce(
      () =>
        new Promise<void>((resolve) => {
          releaseFirstIndex = resolve
        })
    )
    const { voiceAccountIdentity, voiceMessageIdentity } = await import(
      '../../src/main/voice-pipeline/voice-message-identity'
    )
    const service = new KnowledgeSearchService('/tmp/wxe-knowledge-fallback', '/missing-worker.js')
    const update = (localId: number, createTime: number): VoiceTranscriptUpdate => {
      const reference = { sessionId: 'voice-contact', localId, createTime }
      return {
        accountIdentity: voiceAccountIdentity(chatState.accountId),
        reference,
        messageIdentity: voiceMessageIdentity(reference),
        state: 'transcribed' as const,
        transcript: `转写 ${localId}`,
        cached: false
      }
    }

    const first = service.indexVoiceTranscript(update(18, 1_785_895_200))
    await vi.waitFor(() => expect(knowledgeService.index).toHaveBeenCalledTimes(1))
    const second = service.indexVoiceTranscript(update(19, 1_785_895_201))
    const third = service.indexVoiceTranscript(update(18, 1_785_895_200))
    releaseFirstIndex?.()

    await Promise.all([first, second, third])
    expect(knowledgeService.index).toHaveBeenCalledTimes(2)
    expect(listMessagesAsync).toHaveBeenCalledTimes(2)
    await service.dispose()
  })

  it('uses existing Knowledge evidence while a new incremental pass is running', async () => {
    chatState.ready = true
    chatState.accountId = 'fixture-account'
    knowledgeService.search.mockResolvedValue({
      state: 'indexing',
      indexedMessageCount: 300,
      indexedChunkCount: 60,
      evidence: [
        {
          chunkId: 'chunk-1',
          conversationId: 'fixture-conversation',
          messageId: 'fixture-message',
          senderId: 'fixture-sender',
          sender: '脱敏成员',
          timestamp: 1785895200000,
          startTime: 1785895200000,
          endTime: 1785895200000,
          messageIds: ['fixture-message'],
          text: 'Knowledge 已完成的部分可以立即检索。'
        }
      ]
    })

    const service = new KnowledgeSearchService('/tmp/wxe-knowledge-fallback', '/missing-worker.js')
    const result = await service.search({
      text: 'fallback',
      terms: ['fallback'],
      limit: 10
    })

    expect(result).toMatchObject({
      source: 'knowledge',
      state: 'indexing',
      totalMessages: 300
    })
    expect(result.evidence).toHaveLength(1)
    expect(listMessagesAsync).not.toHaveBeenCalled()
    await service.dispose()
  })

  it('splits a large scope filter before sending it to the Knowledge Worker', async () => {
    chatState.ready = true
    chatState.accountId = 'fixture-account'
    knowledgeService.search.mockResolvedValue({
      state: 'ready',
      indexedMessageCount: 1_500,
      indexedChunkCount: 300,
      evidence: []
    })
    const conversationIds = Array.from({ length: 1_401 }, (_, index) => `conversation-${index}`)
    const service = new KnowledgeSearchService('/tmp/wxe-knowledge-fallback', '/missing-worker.js')

    const result = await service.search({
      text: '知识库',
      terms: ['知识库'],
      conversationIds,
      limit: 10
    })

    expect(result).toMatchObject({ source: 'knowledge', totalMessages: 1_500 })
    expect(knowledgeService.search).toHaveBeenCalledTimes(3)
    for (const [request] of knowledgeService.search.mock.calls) {
      expect(request.conversationIds.length).toBeLessThanOrEqual(700)
    }
    await service.dispose()
  })

  it('resolves a group member wxid to its group nickname in fallback evidence', async () => {
    listContactsAsync.mockResolvedValue([
      { md5: 'fixture-group', m_nsNickName: '脱敏群聊', type: 'group' }
    ])
    listMessagesAsync.mockResolvedValue([
      {
        id: 'group-message',
        from: 'wxid_member',
        type: '普通文本',
        content: '今天继续健身。',
        isSender: false,
        senderId: 'wxid_member',
        name: 'wxid_member',
        createTime: 1785895200
      }
    ])
    getGroupSnapshotAsync.mockResolvedValue({
      roomId: 'fixture-group@chatroom',
      memberCount: 1,
      members: [
        {
          wxid: 'wxid_member',
          nickname: '微信昵称',
          groupNickname: '健身同学',
          wechatNickname: '微信昵称',
          remark: '',
          avatar: ''
        }
      ]
    })

    const service = new KnowledgeSearchService('/tmp/wxe-knowledge-fallback', '/missing-worker.js')
    const result = await service.search({ text: '健身', terms: ['健身'], limit: 10 })

    expect(result.evidence).toEqual([
      expect.objectContaining({ senderId: 'wxid_member', sender: '健身同学' })
    ])
    expect(getGroupSnapshotAsync).toHaveBeenCalledWith('fixture-group')
    await service.dispose()
  })
})