import { afterAll, afterEach, beforeAll, beforeEach, describe, expect, it, vi } from 'vitest';
import { getAuth } from 'firebase-admin/auth';
import { getFirestore } from 'firebase-admin/firestore';

import { bootAdmin, shutdownAdmin } from './support.js';
import { fnAuthOnCreate } from '../src/account/account.js';
import { fnAuthKakao, kakaoUidOf } from '../src/account/kakao.js';

/** 이메일 선택 수집 — 동의한 이메일만 남기고, 이메일이 없어도 가입 · 로그인된다. */

const U = 'test-email-user';
const KAKAO_ID = '555000111';
const db = () => getFirestore();

type KakaoReq = Parameters<typeof fnAuthKakao.run>[0];
const onCreate = (uid: string, extra: Record<string, unknown> = {}) =>
  (fnAuthOnCreate as unknown as { run: (u: unknown) => Promise<void> })
    .run({ uid, email: undefined, displayName: undefined, photoURL: undefined, providerData: [], ...extra });

function stubKakao(email?: string) {
  vi.stubGlobal('fetch', vi.fn(async (url: string) => {
    if (url.endsWith('/v1/user/access_token_info')) return Response.json({ id: Number(KAKAO_ID), app_id: 123 });
    return Response.json({
      id: Number(KAKAO_ID),
      kakao_account: { profile: { nickname: '카카오' }, ...(email ? { email, is_email_valid: true, is_email_verified: true } : {}) },
    });
  }));
}

async function wipe() {
  await getAuth().deleteUsers([U, kakaoUidOf(KAKAO_ID)]);
  for (const uid of [U, kakaoUidOf(KAKAO_ID)]) await db().recursiveDelete(db().doc(`users/${uid}`));
}

beforeAll(() => {
  if (!process.env.FIREBASE_AUTH_EMULATOR_HOST) throw new Error('FIREBASE_AUTH_EMULATOR_HOST 가 없습니다.');
  process.env.KAKAO_APP_ID = '123';
  bootAdmin();
});
afterAll(async () => { await wipe(); await shutdownAdmin(); });
beforeEach(wipe);
afterEach(() => { vi.unstubAllGlobals(); });

describe('계정 생성 트리거', () => {
  it('제공자 정보의 이메일을 쓰고 · 이미 쓴 값은 덮지 않는다', async () => {
    await db().doc(`users/${U}`).set({ displayName: '먼저씀' });
    await onCreate(U, { providerData: [{ providerId: 'oidc.line', email: 'line@fan.io' }] });
    const user = (await db().doc(`users/${U}`).get()).data()!;
    expect(user.displayName).toBe('먼저씀');
    expect(user.email).toBe('line@fan.io');
    expect(user.status).toBe('active');
    expect((await db().doc(`users/${U}/wallet/main`).get()).get('activityBalance')).toBe(0);
  });

  it('이메일이 없으면 null 로 만든다', async () => {
    await onCreate(U, { providerData: [{ providerId: 'oidc.line' }] });
    expect((await db().doc(`users/${U}`).get()).get('email')).toBeNull();
  });
});

describe('카카오 이메일', () => {
  it('동의한 이메일만 사용자 문서에 남기고 · 없어도 로그인된다', async () => {
    stubKakao();
    const first = await fnAuthKakao.run({ data: { accessToken: 'good' } } as KakaoReq) as { token: string };
    expect(first.token).toBeTruthy();
    expect((await db().doc(`users/${kakaoUidOf(KAKAO_ID)}`).get()).get('email')).toBeUndefined();
    stubKakao('fan@kakao.com');
    await fnAuthKakao.run({ data: { accessToken: 'good' } } as KakaoReq);
    expect((await db().doc(`users/${kakaoUidOf(KAKAO_ID)}`).get()).get('email')).toBe('fan@kakao.com');
  });
});