// flow_auth_test.dart — L2 登陆/重启续登/登出 流程(真 AuthNotifier + 内存 TokenStore)。
//
// 驱动真实的 AuthNotifier(非桩),只在可注入接缝(TokenStore)处换内存实现,
// 覆盖你最初诉求里的「自动登陆 / 重启续登 / 登出」。
import 'package:flutter_test/flutter_test.dart';
import 'package:pangolin_vpn/services/auth_api.dart';
import 'package:pangolin_vpn/services/token_store.dart';
import 'package:pangolin_vpn/state/auth_provider.dart';

/// 内存 TokenStore:实现接口、用字段存,避免 FlutterSecureStorage 平台依赖。
class _MemTokenStore implements TokenStore {
  String? _access;
  String? _refresh;
  bool _onboarded = false;
  String? _email;

  @override
  Future<void> saveTokens({required String access, required String refresh}) async {
    _access = access;
    _refresh = refresh;
  }

  @override
  Future<String?> loadAccessToken() async => _access;
  @override
  Future<String?> loadRefreshToken() async => _refresh;
  @override
  Future<void> clear() async {
    _access = null;
    _refresh = null;
  }

  @override
  Future<void> markOnboarded() async => _onboarded = true;
  @override
  Future<bool> isOnboarded() async => _onboarded;
  @override
  Future<void> saveLastEmail(String email) async => _email = email;
  @override
  Future<String?> loadLastEmail() async => _email;
}

/// 等 AuthNotifier 构造时的 _loadFromStore() 这个 microtask 跑完。
Future<void> _settle() => Future<void>.delayed(Duration.zero);

void main() {
  test('登陆:saveTokens → isLoggedIn 且令牌持久化', () async {
    final store = _MemTokenStore();
    final auth = AuthNotifier(store);
    await _settle();
    expect(auth.state.isLoggedIn, isFalse, reason: '初始未登录');

    await auth.saveTokens(
      const AuthTokens(accessToken: 'access-1', refreshToken: 'refresh-1'),
    );

    expect(auth.state.isLoggedIn, isTrue);
    expect(auth.state.accessToken, 'access-1');
    expect(await store.loadAccessToken(), 'access-1', reason: '令牌落盘');
    expect(await store.loadRefreshToken(), 'refresh-1');
    auth.dispose();
  });

  test('重启续登:新 AuthNotifier 从同一 store 恢复登录态', () async {
    final store = _MemTokenStore();
    await store.saveTokens(access: 'persisted-access', refresh: 'persisted-refresh');

    // 模拟「重启 app」:全新 AuthNotifier 实例读同一持久化 store。
    final auth = AuthNotifier(store);
    await _settle(); // 等 _loadFromStore

    expect(auth.state.isLoggedIn, isTrue, reason: '续登:无需重新输密码');
    expect(auth.state.accessToken, 'persisted-access');
    auth.dispose();
  });

  test('登出:logout → 未登录 且 store 清空(下次重启不再续登)', () async {
    final store = _MemTokenStore();
    await store.saveTokens(access: 'a', refresh: 'r');
    final auth = AuthNotifier(store);
    await _settle();
    expect(auth.state.isLoggedIn, isTrue);

    await auth.logout();

    expect(auth.state.isLoggedIn, isFalse);
    expect(await store.loadAccessToken(), isNull, reason: '令牌已清');

    // 登出后再「重启」→ 仍是未登录。
    final after = AuthNotifier(store);
    await _settle();
    expect(after.state.isLoggedIn, isFalse);
    auth.dispose();
    after.dispose();
  });
}