import { describe, expect, it, vi } from 'vitest'
import type { GuideStopInfo } from '@/data/adapters/guideStopInfoAdapter'
import type { AudioPlayInfoRepository } from '@/repositories/AudioPlayInfoRepository'
import type { ExplainRepository } from '@/repositories/ExplainRepository'
import { ExplainUseCase } from '@/usecases/explainUseCase'
import { dataSourceConfig } from '@/config/dataSource'

const createStopInfo = (overrides: Partial<GuideStopInfo> = {}): GuideStopInfo => ({
  available: true,
  targetType: 'STOP',
  targetId: 'stop-1',
  lang: 'zh-CN',
  title: 'Guide stop',
  galleryUrls: [],
  imageStatus: 'MISSING',
  linkedExhibits: [
    {
      id: 'exhibit-1',
      name: 'Linked exhibit',
      coverImageUrl: '/linked-exhibit.jpg'
    }
  ],
  playTargetType: 'STOP',
  playTargetId: 'stop-1',
  hasAudio: false,
  hasText: false,
  supportedLanguages: [],
  languageVariants: {},
  audioStatus: 'MISSING',
  ...overrides
})

const createUseCase = (stopInfo: GuideStopInfo) => {
  const explain = {
    getExhibitById: vi.fn().mockResolvedValue(null),
    listExplainExhibits: vi.fn().mockResolvedValue([])
  } as unknown as ExplainRepository
  const audioPlayInfo = {
    getStopInfo: vi.fn().mockResolvedValue(stopInfo)
  } as unknown as AudioPlayInfoRepository

  return new ExplainUseCase(explain, audioPlayInfo)
}

describe('ExplainUseCase stop image policy', () => {
  it('uses stop-info first in remote mode without requesting a catalog fallback', async () => {
    const originalMode = dataSourceConfig.explainContentMode
    Object.assign(dataSourceConfig, { explainContentMode: 'remote' })
    const explain = {
      getExhibitById: vi.fn(),
      listExplainExhibits: vi.fn(),
      listExplainExhibitsByHall: vi.fn()
    } as unknown as ExplainRepository
    const audio = { getStopInfo: vi.fn().mockResolvedValue(createStopInfo()) } as unknown as AudioPlayInfoRepository

    await new ExplainUseCase(explain, audio).enterExplainDetail({
      exhibitId: 'stop-1', targetType: 'STOP', targetId: 'stop-1', hallName: '宇宙厅'
    })

    expect(audio.getStopInfo).toHaveBeenCalledTimes(1)
    expect(explain.getExhibitById).not.toHaveBeenCalled()
    expect(explain.listExplainExhibits).not.toHaveBeenCalled()
    Object.assign(dataSourceConfig, { explainContentMode: originalMode })
  })

  it('delegates hall exhibits and business-unit stops without loading full exhibits', async () => {
    const explain = {
      listExplainExhibitsByHall: vi.fn().mockResolvedValue([]),
      listGuideStopsByBusinessUnit: vi.fn().mockResolvedValue([])
    } as unknown as ExplainRepository
    const useCase = new ExplainUseCase(explain, {} as AudioPlayInfoRepository)
    await useCase.listExhibitsByHallId('hall-1')
    await useCase.listGuideStopsByBusinessUnit('hall-1', 'outline-1')
    expect(explain.listExplainExhibitsByHall).toHaveBeenCalledWith('hall-1')
    expect(explain.listGuideStopsByBusinessUnit).toHaveBeenCalledWith('hall-1', 'outline-1')
  })
  it('does not use linked exhibit images when stop-info reports MISSING', async () => {
    const detail = await createUseCase(createStopInfo()).enterExplainDetail({
      exhibitId: 'stop-1',
      targetType: 'STOP',
      targetId: 'stop-1'
    })

    expect(detail.image).toBeUndefined()
    expect(detail.galleryUrls).toEqual([])
    expect(detail.linkedExhibits?.[0]?.coverImageUrl).toBe('/linked-exhibit.jpg')
  })

  it('uses the stop image when stop-info reports READY', async () => {
    const detail = await createUseCase(createStopInfo({
      imageStatus: 'READY',
      coverImageUrl: '/guide-stop.jpg',
      galleryUrls: ['/guide-stop-gallery.jpg']
    })).enterExplainDetail({
      exhibitId: 'stop-1',
      targetType: 'STOP',
      targetId: 'stop-1'
    })

    expect(detail.image).toBe('/guide-stop.jpg')
    expect(detail.galleryUrls).toEqual(['/guide-stop-gallery.jpg'])
  })

  it('uses stop-info language variants locally without requesting play-info or text-info', async () => {
    const audio = {
      getStopInfo: vi.fn().mockResolvedValue(createStopInfo({
        hasAudio: true,
        hasText: true,
        supportedLanguages: ['zh-CN', 'yue-HK'],
        languageVariants: {
          'zh-CN': {
            lang: 'zh-CN',
            enabled: true,
            playable: true,
            playUrl: '/audio/zh.mp3',
            duration: 50,
            hasText: true,
            textAvailable: true,
            text: '普通话讲解词',
            fallback: false,
            audioStatus: 'READY'
          },
          'yue-HK': {
            lang: 'yue-HK',
            enabled: true,
            playable: true,
            playUrl: '/audio/yue.mp3',
            duration: 52,
            hasText: true,
            textAvailable: true,
            text: '粤语通道使用普通话文案',
            fallback: false,
            audioStatus: 'READY'
          }
        } as GuideStopInfo['languageVariants']
      })),
      getPlayInfo: vi.fn(),
      getTextInfo: vi.fn()
    } as unknown as AudioPlayInfoRepository
    const explain = {
      getExhibitById: vi.fn(),
      listExplainExhibits: vi.fn()
    } as unknown as ExplainRepository
    const useCase = new ExplainUseCase(explain, audio)

    const detail = await useCase.enterExplainDetail({
      exhibitId: 'stop-1', targetType: 'STOP', targetId: 'stop-1', lang: 'zh-CN'
    })
    const cantonese = useCase.selectExplainDetailLanguage(detail, 'yue-HK')

    expect(detail.guideText).toBe('普通话讲解词')
    expect(detail.audioUrl).toBe('/audio/zh.mp3')
    expect(cantonese.guideText).toBe('粤语通道使用普通话文案')
    expect(cantonese.audioUrl).toBe('/audio/yue.mp3')
    expect(cantonese.audioDuration).toBe(52)
    expect((audio as any).getPlayInfo).not.toHaveBeenCalled()
    expect((audio as any).getTextInfo).not.toHaveBeenCalled()
  })
})