import 'package:flutter/material.dart';
import 'dart:async';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'core/theme/app_theme.dart';
import 'core/routes/app_routes.dart';
import 'core/storage/storage_service.dart' as legacy_storage;
import 'core/services/storage_service.dart';
import 'core/services/navigation_service.dart';
import 'core/network/api_client.dart';
import 'core/providers/providers.dart';
import 'core/providers/app_state_provider.dart';
import 'core/config/environment.dart';
import 'shared/widgets/error_handler.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();

  FlutterError.onError = (FlutterErrorDetails details) {
    debugPrint('FlutterError: ${details.exception}');
  };
  WidgetsBinding.instance.platformDispatcher.onError = (error, stack) {
    debugPrint('ZoneError: $error');
    return true;
  };

  // 使用runZonedGuarded包裹启动流程，捕获所有未处理异常
  runZonedGuarded(() async {
    // 初始化环境配置
    _initializeEnvironment();

    // 初始化存储服务（两个都初始化以保持兼容性）
    await legacy_storage.StorageService.init();
    await StorageService.getInstance();

    // 初始化API客户端
    await ApiClient.getInstance();

    // 创建Provider容器
    final container = ProviderContainer(
      observers: GlobalProviders.observers,
      overrides: GlobalProviders.overrides,
    );

    // 预加载Provider
    await GlobalProviders.preloadProviders(container);

    runApp(
      UncontrolledProviderScope(
        container: container,
        child: const MyApp(),
      ),
    );
  }, (error, stack) {
    debugPrint('ZoneError: $error');
  });
}

/// 初始化环境配置
void _initializeEnvironment() {
  // 从编译时参数获取环境配置
  const environment = String.fromEnvironment('ENVIRONMENT', defaultValue: 'development');
  EnvironmentConfig.setEnvironmentFromString(environment);
  
  // 检查是否有自定义API地址
  const customApiUrl = String.fromEnvironment('API_BASE_URL');
  
  debugPrint('========================================');
  debugPrint('Environment: ${EnvironmentConfig.environmentName}');
  debugPrint('API Base URL: ${EnvironmentConfig.baseUrl}');
  if (customApiUrl.isNotEmpty) {
    debugPrint('Custom API URL: $customApiUrl');
  }
  debugPrint('Debug Mode: ${EnvironmentConfig.debugMode}');
  debugPrint('Enable Logging: ${EnvironmentConfig.enableLogging}');
  debugPrint('========================================');
}

class MyApp extends ConsumerStatefulWidget {
  const MyApp({super.key});

  @override
  ConsumerState<MyApp> createState() => _MyAppState();
}

class _MyAppState extends ConsumerState<MyApp> {
  @override
  void initState() {
    super.initState();
    // 确保应用启动后立即关闭全局加载状态
    WidgetsBinding.instance.addPostFrameCallback((_) {
      ref.read(appStateProvider.notifier).updateLoading(false);
    });
  }

  @override
  Widget build(BuildContext context) {
    final appState = ref.watch(appStateProvider);
    
    return GlobalErrorHandler(
      child: MaterialApp(
        title: 'AI English Learning',
        theme: AppTheme.lightTheme,
        darkTheme: AppTheme.darkTheme,
        themeMode: appState.themeMode,
        navigatorKey: NavigationService.instance.navigatorKey,
        initialRoute: Routes.home,
        onGenerateRoute: AppRoutes.onGenerateRoute,
        builder: (context, child) {
          return Stack(
            children: [
              child ?? const SizedBox.shrink(),
              if (appState.isGlobalLoading)
                const Positioned.fill(
                  child: Material(
                    color: Colors.black54,
                    child: Center(
                      child: CircularProgressIndicator(),
                    ),
                  ),
                ),
            ],
          );
        },
      ),
    );
  }
}