// 功能描述：验证会话失效的幂等清理、旧请求隔离和存储异常降级。
// 版本：1.0.0
import 'package:flutter_test/flutter_test.dart';
import 'package:user_app/app/dependencies.dart';
import 'package:user_app/data/services/secure_session_store.dart';

/// 提供可观测的内存令牌存储，避免测试依赖真实平台插件。
class _MemorySessionStore implements SessionStore {
  _MemorySessionStore({this.token, this.clearError});

  String? token;
  final Object? clearError;
  int clearCount = 0;

  @override
  Future<void> clear() async {
    clearCount++;
    if (clearError != null) throw clearError!;
    token = null;
  }

  @override
  Future<String?> readToken() async => token;

  @override
  Future<void> writeToken(String token) async {
    this.token = token;
  }
}

/// 覆盖并发 401、迟到的旧请求和安全存储删除失败场景。
void main() {
  test('同一失效令牌只清理并通知一次', () async {
    final store = _MemorySessionStore(token: 'JWT expired-token');
    final session = UserSession(store);
    await session.restore();
    var notificationCount = 0;
    session.addListener(() => notificationCount++);

    session.invalidate('JWT expired-token');
    session.invalidate('JWT expired-token');
    await Future<void>.delayed(Duration.zero);

    expect(session.token, isEmpty);
    expect(session.hasExpired, isTrue);
    expect(store.clearCount, 1);
    expect(notificationCount, 1);
  });

  test('迟到的旧请求不得使当前令牌失效', () async {
    final store = _MemorySessionStore(token: 'JWT current-token');
    final session = UserSession(store);
    await session.restore();

    session.invalidate('JWT old-token');
    await Future<void>.delayed(Duration.zero);

    expect(session.token, 'JWT current-token');
    expect(session.hasExpired, isFalse);
    expect(store.clearCount, 0);
  });

  test('持久化删除失败也立即清空内存登录态', () async {
    final store = _MemorySessionStore(
      token: 'JWT expired-token',
      clearError: StateError('storage unavailable'),
    );
    final session = UserSession(store);
    await session.restore();

    session.invalidate('JWT expired-token');
    await Future<void>.delayed(Duration.zero);

    expect(session.token, isEmpty);
    expect(session.hasExpired, isTrue);
    expect(store.clearCount, 1);
  });
}