// quota_controller_test.dart — 免费额度状态(派生自 me/plans)
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:pangolin_vpn/services/token_store.dart';
import 'package:pangolin_vpn/state/auth_provider.dart';
import 'package:pangolin_vpn/state/quota_provider.dart';

// 避免触碰真实 FlutterSecureStorage 插件(单测无平台)。
class _NullTokenStore implements TokenStore {
  const _NullTokenStore();
  @override
  Future<void> saveTokens({required String access, required String refresh}) async {}
  @override
  Future<String?> loadAccessToken() async => null;
  @override
  Future<String?> loadRefreshToken() async => null;
  @override
  Future<void> clear() async {}
  @override
  Future<void> markOnboarded() async {}
  @override
  Future<bool> isOnboarded() async => true;
  @override
  Future<void> saveLastEmail(String email) async {}
  @override
  Future<String?> loadLastEmail() async => null;
}

ProviderContainer _container() => ProviderContainer(
      overrides: [tokenStoreProvider.overrideWithValue(const _NullTokenStore())],
    );

void main() {
  // 纯状态逻辑(与数据源无关)。
  group('FreeQuotaState', () {
    test('progress = 剩余/总额', () {
      expect(const FreeQuotaState(totalMinutes: 10, remainingMinutes: 5).progress,
          closeTo(0.5, 1e-9));
    });
    test('isLow:剩余 ≤3 分钟为真', () {
      expect(const FreeQuotaState(remainingMinutes: 3).isLow, true);
      expect(const FreeQuotaState(remainingMinutes: 4).isLow, false);
    });
    test('isExhausted:剩余 ≤0 为真', () {
      expect(const FreeQuotaState(remainingMinutes: 0).isExhausted, true);
      expect(const FreeQuotaState(remainingMinutes: 1).isExhausted, false);
    });
  });

  // 未登录默认态:总额 10 / 剩余 10 / 未耗尽。
  group('quotaProvider', () {
    test('默认 10/10 未耗尽', () {
      final c = _container();
      addTearDown(c.dispose);
      final q = c.read(quotaProvider);
      expect(q.totalMinutes, 10);
      expect(q.remainingMinutes, 10);
      expect(q.isExhausted, false);
    });

    test('markExhausted 本地立即置剩余 0', () {
      final c = _container();
      addTearDown(c.dispose);
      c.read(quotaProvider.notifier).markExhausted();
      expect(c.read(quotaProvider).remainingMinutes, 0);
      expect(c.read(quotaProvider).isExhausted, true);
    });
  });
}