import 'package:flutter_test/flutter_test.dart';
import 'package:flutter/material.dart';
import 'package:flutter_gen/gen_l10n/app_localizations.dart';

void main() {
  group('Localization Tests', () {
    test('AppLocalizations should support required locales', () {
      final supportedLocales = AppLocalizations.supportedLocales;
      
      // 检查是否支持中文（简体）
      expect(
        supportedLocales.any((locale) => 
          locale.languageCode == 'zh' && locale.countryCode == 'CN',
        ),
        true,
      );
      
      // 检查是否支持英文
      expect(
        supportedLocales.any((locale) => 
          locale.languageCode == 'en',
        ),
        true,
      );
    });

    testWidgets('Chinese locale should load Chinese translations', (WidgetTester tester) async {
      await tester.pumpWidget(
        MaterialApp(
          locale: const Locale('zh', 'CN'),
          localizationsDelegates: AppLocalizations.localizationsDelegates,
          supportedLocales: AppLocalizations.supportedLocales,
          home: Builder(
            builder: (context) {
              return Scaffold(
                body: Text(AppLocalizations.of(context)!.appTitle),
              );
            },
          ),
        ),
      );

      expect(find.text('Mobile EDA'), findsOneWidget);
    });

    testWidgets('English locale should load English translations', (WidgetTester tester) async {
      await tester.pumpWidget(
        MaterialApp(
          locale: const Locale('en', 'US'),
          localizationsDelegates: AppLocalizations.localizationsDelegates,
          supportedLocales: AppLocalizations.supportedLocales,
          home: Builder(
            builder: (context) {
              return Scaffold(
                body: Text(AppLocalizations.of(context)!.homeScreen),
              );
            },
          ),
        ),
      );

      expect(find.text('Home'), findsOneWidget);
    });
  });

  group('RTL Support Tests', () {
    test('Arabic locale should be RTL', () {
      const arabicLocale = Locale('ar', 'SA');
      expect(arabicLocale.languageCode, 'ar');
    });

    testWidgets('RTL layout should be applied for Arabic', (WidgetTester tester) async {
      await tester.pumpWidget(
        MaterialApp(
          locale: const Locale('ar', 'SA'),
          localizationsDelegates: AppLocalizations.localizationsDelegates,
          supportedLocales: AppLocalizations.supportedLocales,
          builder: (context, child) {
            return Directionality(
              textDirection: TextDirection.rtl,
              child: child!,
            );
          },
          home: const Scaffold(
            body: Row(
              children: [
                Expanded(child: Text('First')),
                Expanded(child: Text('Second')),
              ],
            ),
          ),
        ),
      );

      // RTL 布局中，第一个元素应该在右侧
      final firstFinder = find.text('First');
      final secondFinder = find.text('Second');
      
      expect(firstFinder, findsOneWidget);
      expect(secondFinder, findsOneWidget);
    });
  });

  group('Translation Completeness Tests', () {
    test('All locales should have same keys', () {
      // 这个测试确保所有语言文件有相同的键
      // 在实际项目中，可以通过解析 ARB 文件来验证
      expect(true, true); // 占位符测试
    });
  });
}