import {
  buildValidateDownloadUrl,
  validateAndTriggerDownload,
} from '@/lib/client-download'

describe('client-download', () => {
  beforeEach(() => {
    jest.restoreAllMocks()
    document.body.innerHTML = ''
  })

  test('buildValidateDownloadUrl 应在原 URL 上追加 validate=1', () => {
    const url = '/api/materials/download?id=abc&type=all'
    const result = buildValidateDownloadUrl(url)

    expect(result).toBe('/api/materials/download?id=abc&type=all&validate=1')
  })

  test('validate 成功后应触发直连下载', async () => {
    jest.useFakeTimers()
    const fetchMock = jest.fn().mockResolvedValue({
      ok: true,
      json: async () => ({ success: true }),
    })
    global.fetch = fetchMock as any

    const clickSpy = jest
      .spyOn(HTMLAnchorElement.prototype, 'click')
      .mockImplementation(() => {})

    await validateAndTriggerDownload('/api/materials/download?id=mid-1')

    expect(fetchMock).toHaveBeenCalledWith(
      '/api/materials/download?id=mid-1&validate=1',
      expect.objectContaining({
        method: 'GET',
        cache: 'no-store',
      })
    )
    expect(clickSpy).toHaveBeenCalledTimes(1)

    jest.runAllTimers()
    jest.useRealTimers()
  })

  test('validate 失败时不应触发下载，并抛出后端错误', async () => {
    const fetchMock = jest.fn().mockResolvedValue({
      ok: false,
      json: async () => ({ code: 'FORBIDDEN', error: '无权限下载该素材' }),
    })
    global.fetch = fetchMock as any

    const clickSpy = jest
      .spyOn(HTMLAnchorElement.prototype, 'click')
      .mockImplementation(() => {})

    await expect(
      validateAndTriggerDownload('/api/materials/download?id=mid-2')
    ).rejects.toMatchObject({ code: 'FORBIDDEN' })

    expect(clickSpy).not.toHaveBeenCalled()
  })
})