import { beforeEach, describe, expect, it, vi } from 'vitest'

import { fetchWikiPage, fetchWikiPageByTitle, fetchWikiPages } from '@/lib/wiki'

const api = vi.hoisted (() => ({ apiGet: vi.fn () }))

vi.mock ('@/lib/api', () => api)

describe ('wiki API functions', () => {
  beforeEach (() => {
    vi.clearAllMocks ()
  })

  it ('fetches wiki index and show pages with expected parameters', async () => {
    api.apiGet.mockResolvedValueOnce ([])
    api.apiGet.mockResolvedValueOnce ({ id: 1 })

    await fetchWikiPages ({ title: '虹' })
    await fetchWikiPage ('1', { version: '3' })

    expect (api.apiGet).toHaveBeenNthCalledWith (
	1,
	'/wiki',
	{ params: { title: '虹' } })
    expect (api.apiGet).toHaveBeenNthCalledWith (
	2,
	'/wiki/1',
	{ params: { version: '3' } })
  })

  it ('encodes title path segments and returns null on misses', async () => {
    api.apiGet.mockResolvedValueOnce ({ id: 2 })
    api.apiGet.mockRejectedValueOnce ({ isAxiosError: true, response: { status: 404 } })

    await fetchWikiPageByTitle ('a/b c', { version: undefined })
    await expect (fetchWikiPageByTitle ('missing', { })).resolves.toBeNull ()

    expect (api.apiGet).toHaveBeenNthCalledWith (
	1,
	'/wiki/title/a%2Fb%20c',
	{ params: { version: undefined } })
  })

  it.each ([403, 500]) ('preserves HTTP %s errors', async status => {
    const error = { isAxiosError: true, response: { status } }
    api.apiGet.mockRejectedValueOnce (error)
    await expect (fetchWikiPageByTitle ('ホーム', { })).rejects.toBe (error)
  })

  it ('preserves network failures for callers', async () => {
    const error = new Error ('network failure')
    api.apiGet.mockRejectedValueOnce (error)
    await expect (fetchWikiPageByTitle ('ホーム', { })).rejects.toBe (error)
  })
})