import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:patbond_flutter/app/app.dart';
import 'package:patbond_flutter/app/app_localization.dart';
import 'package:patbond_flutter/features/auth/session_manager.dart';
import 'package:shared_preferences/shared_preferences.dart';

import '../helpers/auth_test_helpers.dart';
import '../helpers/community_test_helpers.dart';
import '../helpers/pet_test_helpers.dart';

/// M3.5-01：根 [MaterialApp] 实际挂上 zh-CN 本地化。
///
/// 用户桌面实测反馈「日期选择器全英文」的根因就在这里——delegate 一行没配，
/// Material 静默回退英文兜底。本测试守住这一行不被回删。
void main() {
  testWidgets('MaterialApp 挂三件套 delegate + 单语言 zh-CN', (tester) async {
    SharedPreferences.setMockInitialValues({});
    final session = SessionManager(store: InMemoryTokenStore())
      ..markAuthenticated();

    await tester.pumpWidget(
      App(
        sessionManager: session,
        authRepository: FakeAuthRepository(),
        petsRepository: FakePetsRepository(),
        communityRepository: FakeCommunityRepository()
          ..onFeed = (_, _) async => feedPage(const []),
      ),
    );
    await tester.pumpAndSettle();

    final app = tester.widget<MaterialApp>(find.byType(MaterialApp));
    expect(app.localizationsDelegates, appLocalizationsDelegates);
    expect(app.supportedLocales, appSupportedLocales);
    expect(app.locale, const Locale('zh', 'CN'));

    // 运行期实际解析出的 Material 文案为中文（不是 Default* 英文兜底）。
    final context = tester.element(find.byType(NavigationBar));
    final l10n = MaterialLocalizations.of(context);
    expect(l10n.okButtonLabel, '确定');
    expect(l10n.cancelButtonLabel, '取消');
    expect(l10n.datePickerHelpText, '选择日期');
    expect(l10n.dateInputLabel, '输入日期');
    expect(l10n.inputDateModeButtonLabel, '切换到输入模式');
    expect(l10n.invalidDateFormatLabel, '格式无效。');
    expect(l10n.formatMonthYear(DateTime(2026, 9, 10)), '2026年9月');
  });
}