import { afterEach, describe, expect, it, vi } from 'vitest'
import { fetchLibraryOverview } from './librarySnapshots'

// F16：overview 的非 2xx 响应曾被当成正常状态，页面随后在 `overview.gate.sync_allowed`
// 上抛 TypeError（白屏）。这里把三种真实失败形状固定下来：401/503 与畸形 JSON。
const originalFetch = globalThis.fetch

afterEach(() => {
  globalThis.fetch = originalFetch
  vi.restoreAllMocks()
})

describe('fetchLibraryOverview（HTTP 状态与结构）', () => {
  it('401 的 {error} 不许被当成发布状态', async () => {
    globalThis.fetch = vi.fn(
      async () => new Response(JSON.stringify({ error: 'unauthenticated' }), { status: 401 })
    ) as unknown as typeof fetch
    await expect(fetchLibraryOverview('internal')).rejects.toThrow(/HTTP 401/)
  })

  it('503 的闸口拒绝同样必须报错', async () => {
    globalThis.fetch = vi.fn(
      async () => new Response(JSON.stringify({ available: false, reason: '存储不可用' }), { status: 503 })
    ) as unknown as typeof fetch
    await expect(fetchLibraryOverview('internal')).rejects.toThrow(/HTTP 503/)
  })

  it('200 但缺 gate/jobs 的结构不符也要报错', async () => {
    globalThis.fetch = vi.fn(
      async () => new Response(JSON.stringify({ scope: 'internal' }), { status: 200 })
    ) as unknown as typeof fetch
    await expect(fetchLibraryOverview('internal')).rejects.toThrow(/结构不符合预期/)
  })

  it('结构正确的 200 正常返回（避免把正常请求也拦掉）', async () => {
    const payload = {
      scope: 'internal',
      production: { state: 'unknown' },
      prebackup: { state: 'unknown' },
      diff: { state: 'unknown', added: [], updated: [], removed: [] },
      jobs: [],
      gate: { sync_allowed: false, reasons: [] },
      authorization: { state: 'none' },
      capture_available: false,
      now: new Date().toISOString(),
    }
    globalThis.fetch = vi.fn(
      async () => new Response(JSON.stringify(payload), { status: 200 })
    ) as unknown as typeof fetch
    const value = await fetchLibraryOverview('internal')
    expect(value?.gate.sync_allowed).toBe(false)
  })
})