import { describe, it, expect, beforeEach, vi } from 'vitest'
import { useReviewDataStore } from '../useReviewDataStore'
import { mockDueCards } from '@/lib/mock/reviewMockData'

// Mock flashcardsService
vi.mock('@/lib/services/flashcards', () => ({
  flashcardsService: {
    getDueFlashcards: vi.fn()
  }
}))

// Mock isTestMode
vi.mock('@/lib/mock/reviewMockData', async (importOriginal) => {
  const original: any = await importOriginal()
  return {
    ...original,
    isTestMode: vi.fn(),
    getMockDueCards: vi.fn(() => mockDueCards)
  }
})

describe('useReviewDataStore', () => {
  beforeEach(() => {
    // 重置 store 到初始狀態
    useReviewDataStore.getState().resetData()
    vi.clearAllMocks()
  })

  describe('初始狀態', () => {
    it('應該有正確的初始值', () => {
      const state = useReviewDataStore.getState()

      expect(state.dueCards).toEqual([])
      expect(state.showComplete).toBe(false)
      expect(state.showNoDueCards).toBe(false)
      expect(state.isLoadingCards).toBe(false)
      expect(state.loadingError).toBe(null)
    })
  })

  describe('loadDueCards 測試模式', () => {
    beforeEach(() => {
      vi.mocked(require('@/lib/mock/reviewMockData').isTestMode).mockReturnValue(true)
    })

    it('應該在測試模式下載入 Mock 數據', async () => {
      const store = useReviewDataStore.getState()

      await store.loadDueCards()

      expect(store.dueCards).toEqual(mockDueCards)
      expect(store.showNoDueCards).toBe(false)
      expect(store.showComplete).toBe(false)
      expect(store.isLoadingCards).toBe(false)
    })

    it('應該正確設置載入狀態', async () => {
      const store = useReviewDataStore.getState()

      // 開始載入時檢查狀態
      const loadPromise = store.loadDueCards()
      expect(store.isLoadingCards).toBe(true)

      // 等待完成
      await loadPromise
      expect(store.isLoadingCards).toBe(false)
    })

    it('應該在測試模式下不呼叫真實 API', async () => {
      const { flashcardsService } = await import('@/lib/services/flashcards')
      const store = useReviewDataStore.getState()

      await store.loadDueCards()

      expect(flashcardsService.getDueFlashcards).not.toHaveBeenCalled()
    })
  })

  describe('loadDueCards 正常模式', () => {
    beforeEach(() => {
      vi.mocked(require('@/lib/mock/reviewMockData').isTestMode).mockReturnValue(false)
    })

    it('應該成功載入後端數據', async () => {
      const { flashcardsService } = await import('@/lib/services/flashcards')

      // 創建符合 Flashcard 類型的 Mock 數據
      const mockFlashcard = {
        id: 'mock-1',
        word: 'hello',
        translation: '你好',
        definition: 'used as a greeting',
        partOfSpeech: 'interjection',
        pronunciation: '/həˈloʊ/',
        example: 'Hello, how are you today?',
        exampleTranslation: '你好，你今天好嗎？',
        masteryLevel: 0,
        timesReviewed: 0,
        isFavorite: false,
        nextReviewDate: '2025-10-03T00:00:00Z', // 必填欄位
        cefr: 'A1',
        createdAt: '2024-01-01T00:00:00Z',
        updatedAt: '2024-01-01T00:00:00Z',
        exampleImages: [],
        hasExampleImage: false,
        primaryImageUrl: undefined
      }

      const mockApiResponse = {
        success: true,
        data: [mockFlashcard]
      }
      vi.mocked(flashcardsService.getDueFlashcards).mockResolvedValue(mockApiResponse)

      const store = useReviewDataStore.getState()
      await store.loadDueCards()

      // 期望轉換後的 ExtendedFlashcard 格式
      expect(store.dueCards).toHaveLength(1)
      expect(store.dueCards[0].word).toBe('hello')
      expect(store.dueCards[0].synonyms).toEqual([]) // 轉換層添加的預設值
      expect(store.showNoDueCards).toBe(false)
      expect(flashcardsService.getDueFlashcards).toHaveBeenCalledWith(50)
    })

    it('應該處理 API 錯誤', async () => {
      const { flashcardsService } = await import('@/lib/services/flashcards')
      vi.mocked(flashcardsService.getDueFlashcards).mockRejectedValue(new Error('API錯誤'))

      const store = useReviewDataStore.getState()
      await store.loadDueCards()

      expect(store.dueCards).toEqual([])
      expect(store.showNoDueCards).toBe(true)
      expect(store.loadingError).toBe('載入詞卡失敗')
    })

    it('應該處理空數據回應', async () => {
      const { flashcardsService } = await import('@/lib/services/flashcards')
      const mockApiResponse = {
        success: true,
        data: []
      }
      vi.mocked(flashcardsService.getDueFlashcards).mockResolvedValue(mockApiResponse)

      const store = useReviewDataStore.getState()
      await store.loadDueCards()

      expect(store.dueCards).toEqual([])
      expect(store.showNoDueCards).toBe(true)
    })
  })

  describe('工具方法', () => {
    beforeEach(() => {
      const store = useReviewDataStore.getState()
      store.setDueCards(mockDueCards)
    })

    it('getDueCardsCount 應該返回正確數量', () => {
      const store = useReviewDataStore.getState()

      expect(store.getDueCardsCount()).toBe(3)
    })

    it('findCardById 應該找到正確的詞卡', () => {
      const store = useReviewDataStore.getState()

      const foundCard = store.findCardById('mock-1')
      expect(foundCard).toBeDefined()
      expect(foundCard?.word).toBe('hello')
    })

    it('findCardById 應該在找不到時返回 undefined', () => {
      const store = useReviewDataStore.getState()

      const foundCard = store.findCardById('non-existent')
      expect(foundCard).toBeUndefined()
    })
  })

  describe('resetData', () => {
    it('應該重置所有狀態為初始值', () => {
      const store = useReviewDataStore.getState()

      // 設置一些狀態
      store.setDueCards(mockDueCards)
      store.setShowComplete(true)
      store.setShowNoDueCards(true)
      store.setLoadingError('錯誤')

      // 重置
      store.resetData()

      expect(store.dueCards).toEqual([])
      expect(store.showComplete).toBe(false)
      expect(store.showNoDueCards).toBe(false)
      expect(store.loadingError).toBe(null)
      expect(store.isLoadingCards).toBe(false)
    })
  })
})