import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
import { clearUser, currentUser, login, logout, me, useAuth } from '../../src/state/useAuth'
import { navigation, setNavigation } from '../../src/state/useNavigation'
import { setSettings, settings } from '../../src/state/useSettings'
import { navigationFixture, settingsFixture } from '../fixtures/typed'
import { API, mockApi, profile, requestsTo, resetState } from '../helpers'

const loginOk = (expiresIn: unknown) => ({ body: { data: { token_type: 'cookie', expires_in: expiresIn }, meta: {} } })
const refreshOk = { body: { data: { token_type: 'cookie', expires_in: 50 }, meta: {} } }
const unauthorized = { status: 401, body: { error: { code: 'unauthenticated', message: 'no', details: {} } } }

beforeEach(() => {
  resetState()
})

afterEach(() => {
  clearUser()
  vi.useRealTimers()
})

describe('login', () => {
  it('posts the credentials and schedules the proactive refresh at 80 percent', async () => {
    vi.useFakeTimers()
    const calls = mockApi({ [`POST ${API}/auth/login`]: loginOk(100), [`POST ${API}/auth/refresh`]: refreshOk })

    expect(await login('dev', 'secret')).toBe(true)
    const body = (await requestsTo(calls, 'POST', `${API}/auth/login`)[0]!.clone().json()) as Record<string, string>
    expect(body).toEqual({ login: 'dev', password: 'secret' })
    expect(useAuth().expiresIn.value).toBe(100)

    await vi.advanceTimersByTimeAsync(79_999)
    expect(requestsTo(calls, 'POST', `${API}/auth/refresh`)).toHaveLength(0)
    await vi.advanceTimersByTimeAsync(1)
    expect(requestsTo(calls, 'POST', `${API}/auth/refresh`)).toHaveLength(1)
    // The refresh reschedules from its own lifetime (50 s -> 40 s).
    expect(useAuth().expiresIn.value).toBe(50)
    await vi.advanceTimersByTimeAsync(40_000)
    expect(requestsTo(calls, 'POST', `${API}/auth/refresh`)).toHaveLength(2)
  })

  it('answers false on rejected credentials and schedules nothing', async () => {
    vi.useFakeTimers()
    const calls = mockApi({ [`POST ${API}/auth/login`]: unauthorized, [`POST ${API}/auth/refresh`]: refreshOk })
    expect(await login('dev', 'bad')).toBe(false)
    await vi.advanceTimersByTimeAsync(10_000_000)
    expect(requestsTo(calls, 'POST', `${API}/auth/refresh`)).toHaveLength(0)
  })

  it.each([0, -5, 'soon', null])('schedules no refresh for the lifetime %j', async (expiresIn) => {
    vi.useFakeTimers()
    const calls = mockApi({ [`POST ${API}/auth/login`]: loginOk(expiresIn), [`POST ${API}/auth/refresh`]: refreshOk })
    expect(await login('dev', 'secret')).toBe(true)
    await vi.advanceTimersByTimeAsync(10_000_000)
    expect(requestsTo(calls, 'POST', `${API}/auth/refresh`)).toHaveLength(0)
  })
})

describe('me and clearUser', () => {
  it('loads the profile, and clears it on 401', async () => {
    mockApi({ [`GET ${API}/auth/me`]: { body: profile } })
    expect((await me())?.login).toBe('dev')
    expect(currentUser.value?.role?.name).toBe('Developer')

    mockApi({ [`GET ${API}/auth/me`]: unauthorized })
    expect(await me()).toBeNull()
    expect(currentUser.value).toBeNull()
  })

  it('clearUser forgets the user and cancels the pending refresh', async () => {
    vi.useFakeTimers()
    const calls = mockApi({
      [`GET ${API}/auth/me`]: { body: profile },
      [`POST ${API}/auth/login`]: loginOk(10),
      [`POST ${API}/auth/refresh`]: refreshOk,
    })
    await login('dev', 'secret')
    await me()
    clearUser()
    expect(currentUser.value).toBeNull()
    expect(useAuth().expiresIn.value).toBeNull()
    await vi.advanceTimersByTimeAsync(60_000)
    expect(requestsTo(calls, 'POST', `${API}/auth/refresh`)).toHaveLength(0)
  })
})

describe('logout (T-10-23)', () => {
  async function signedIn(logoutRoute: Parameters<typeof mockApi>[0][string] | 'throw') {
    const routes: Parameters<typeof mockApi>[0] = { [`GET ${API}/auth/me`]: { body: profile } }
    if (logoutRoute !== 'throw') {
      routes[`POST ${API}/auth/logout`] = logoutRoute
    }
    const calls = mockApi(routes)
    await me()
    setNavigation(navigationFixture.data)
    setSettings(settingsFixture.list.data)
    if (logoutRoute === 'throw') {
      vi.spyOn(globalThis, 'fetch').mockRejectedValue(new TypeError('offline'))
    }
    return calls
  }

  it.each([
    ['succeeds', { body: { data: { status: 'logged_out' }, meta: {} } }],
    ['answers 500', { status: 500, body: { error: { code: 'server', message: 'x', details: {} } } }],
    ['fails on the network', 'throw' as const],
  ])('clears the user, navigation and settings and routes to login when the call %s', async (_label, route) => {
    const calls = await signedIn(route)
    const router = { replace: vi.fn().mockResolvedValue(undefined) }

    await logout(router)

    expect(currentUser.value).toBeNull()
    expect(navigation.value).toEqual([])
    expect(settings.value).toEqual([])
    expect(router.replace).toHaveBeenCalledWith({ name: 'login' })
    if (route !== 'throw') {
      const posted = requestsTo(calls, 'POST', `${API}/auth/logout`)
      expect(posted).toHaveLength(1)
      expect(posted[0]!.headers.get('X-Requested-With')).toBe('XMLHttpRequest')
    }
  })

  it('works without a router and swallows a failed navigation', async () => {
    await signedIn({ body: { data: { status: 'logged_out' }, meta: {} } })
    await expect(logout()).resolves.toBeUndefined()
    expect(currentUser.value).toBeNull()

    await signedIn({ body: { data: { status: 'logged_out' }, meta: {} } })
    await expect(logout({ replace: vi.fn().mockRejectedValue(new Error('aborted')) })).resolves.toBeUndefined()
    expect(currentUser.value).toBeNull()
  })

  it('exposes the session API through useAuth', () => {
    const auth = useAuth()
    expect(auth.user).toBe(currentUser)
    expect(auth.login).toBe(login)
    expect(auth.logout).toBe(logout)
    expect(auth.me).toBe(me)
    expect(auth.clearUser).toBe(clearUser)
  })
})