import { describe, it, expect, vi, beforeEach } from 'vitest'
import { renderHook, waitFor, act } from '@testing-library/react'
import { usePhotoUpload } from '@/hooks/usePhotoUpload'
import * as api from '@/lib/api'

// Mock the API
vi.mock('@/lib/api', () => ({
  inventoryApi: {
    uploadItemPhoto: vi.fn(),
  },
}))

describe('usePhotoUpload Hook', () => {
  beforeEach(() => {
    vi.clearAllMocks()
  })

  it('should initialize with default state', () => {
    const { result } = renderHook(() => usePhotoUpload())
    expect(result.current.isLoading).toBe(false)
    expect(result.current.error).toBe(null)
  })

  it('should upload a valid image file', async () => {
    const mockPhoto = {
      thumbnail_url: '/images/test_thumb.jpg',
      full_url: '/images/test_original.jpg',
      uploaded_at: '2026-04-20T10:00:00Z',
    }

    vi.mocked(api.inventoryApi.uploadItemPhoto).mockResolvedValueOnce({
      status: 'ok',
      photo: mockPhoto,
    })

    const { result } = renderHook(() => usePhotoUpload())

    const file = new File(['test'], 'test.jpg', { type: 'image/jpeg' })
    let photo
    await act(async () => {
      photo = await result.current.upload(file, 123)
    })

    expect(photo).toEqual(mockPhoto)
    expect(result.current.error).toBe(null)
  })

  it('should reject file larger than 10MB', async () => {
    const { result } = renderHook(() => usePhotoUpload())

    // Create a file larger than 10MB
    const largeFile = new File(['x'.repeat(10 * 1024 * 1024 + 1)], 'large.jpg', {
      type: 'image/jpeg',
    })

    await act(async () => {
      try {
        await result.current.upload(largeFile, 123)
      } catch (error) {
        // Expected to throw
      }
    })

    expect(result.current.error).toBeTruthy()
    expect(result.current.error).toMatch(/File too large/)
  })

  it('should reject invalid MIME types', async () => {
    const { result } = renderHook(() => usePhotoUpload())

    const invalidFile = new File(['test'], 'test.txt', { type: 'text/plain' })

    await act(async () => {
      try {
        await result.current.upload(invalidFile, 123)
      } catch (error) {
        // Expected to throw
      }
    })

    expect(result.current.error).toBeTruthy()
    expect(result.current.error).toMatch(/Invalid image format/)
  })

  it('should set isLoading to true during upload', async () => {
    let resolveUpload: any
    const uploadPromise = new Promise((resolve) => {
      resolveUpload = resolve
    })

    vi.mocked(api.inventoryApi.uploadItemPhoto).mockReturnValueOnce(uploadPromise as any)

    const { result } = renderHook(() => usePhotoUpload())

    const file = new File(['test'], 'test.jpg', { type: 'image/jpeg' })
    let uploadPromiseResult
    await act(async () => {
      uploadPromiseResult = result.current.upload(file, 123)
    })

    await waitFor(() => {
      expect(result.current.isLoading).toBe(true)
    })

    await act(async () => {
      resolveUpload({ status: 'ok', photo: {} })
      await uploadPromiseResult
    })

    await waitFor(() => {
      expect(result.current.isLoading).toBe(false)
    })
  })

  it('should accept JPEG, PNG, WebP, and GIF formats', async () => {
    const formats = [
      { type: 'image/jpeg', ext: 'jpg' },
      { type: 'image/png', ext: 'png' },
      { type: 'image/webp', ext: 'webp' },
      { type: 'image/gif', ext: 'gif' },
    ]

    const mockPhoto = {
      thumbnail_url: '/images/test_thumb.jpg',
      full_url: '/images/test_original.jpg',
      uploaded_at: '2026-04-20T10:00:00Z',
    }

    vi.mocked(api.inventoryApi.uploadItemPhoto).mockResolvedValue({
      status: 'ok',
      photo: mockPhoto,
    })

    for (const format of formats) {
      const { result } = renderHook(() => usePhotoUpload())
      const file = new File(['test'], `test.${format.ext}`, { type: format.type })

      let photo
      await act(async () => {
        photo = await result.current.upload(file, 123)
      })

      expect(photo).toEqual(mockPhoto)
      expect(result.current.error).toBe(null)
    }
  })

  it('should handle network errors gracefully', async () => {
    vi.mocked(api.inventoryApi.uploadItemPhoto).mockRejectedValueOnce(
      new Error('Network error')
    )

    const { result } = renderHook(() => usePhotoUpload())

    const file = new File(['test'], 'test.jpg', { type: 'image/jpeg' })

    await act(async () => {
      try {
        await result.current.upload(file, 123)
      } catch (error) {
        // Expected to throw
      }
    })

    expect(result.current.error).toBeTruthy()
    expect(result.current.error).toMatch(/Network error/)
  })

  it('should reset error state on successful upload', async () => {
    const mockPhoto = {
      thumbnail_url: '/images/test_thumb.jpg',
      full_url: '/images/test_original.jpg',
      uploaded_at: '2026-04-20T10:00:00Z',
    }

    vi.mocked(api.inventoryApi.uploadItemPhoto).mockResolvedValue({
      status: 'ok',
      photo: mockPhoto,
    })

    const { result } = renderHook(() => usePhotoUpload())

    const file = new File(['test'], 'test.jpg', { type: 'image/jpeg' })
    await act(async () => {
      await result.current.upload(file, 123)
    })

    expect(result.current.error).toBe(null)
  })

  it('should return photo object with correct structure', async () => {
    const mockPhoto = {
      thumbnail_url: '/images/networking/SFP-LR_thumb.jpg',
      full_url: '/images/networking/SFP-LR_original.jpg',
      uploaded_at: '2026-04-20T10:00:00Z',
    }

    vi.mocked(api.inventoryApi.uploadItemPhoto).mockResolvedValueOnce({
      status: 'ok',
      photo: mockPhoto,
    })

    const { result } = renderHook(() => usePhotoUpload())

    const file = new File(['test'], 'test.jpg', { type: 'image/jpeg' })
    let uploadedPhoto
    await act(async () => {
      uploadedPhoto = await result.current.upload(file, 123)
    })

    expect(uploadedPhoto).toHaveProperty('thumbnail_url')
    expect(uploadedPhoto).toHaveProperty('full_url')
    expect(uploadedPhoto).toHaveProperty('uploaded_at')
    expect(uploadedPhoto.thumbnail_url).toBe(mockPhoto.thumbnail_url)
    expect(uploadedPhoto.full_url).toBe(mockPhoto.full_url)
  })
})