import 'dart:ui';
import 'package:flutter/material.dart';
import 'package:bot_toast/bot_toast.dart';
import 'package:flutter_localizations/flutter_localizations.dart';
import 'package:provider/provider.dart';
import 'package:provider/single_child_widget.dart';
import 'package:shared_preferences/shared_preferences.dart';

import 'core/network/dio_client.dart';
import 'core/network/domain_navigator.dart';
import 'core/storage/local_storage.dart';
import 'core/constants/api_endpoints.dart';
import 'core/theme/app_theme.dart';
import 'core/event/app_event_bus.dart';
import 'data/services/user_service.dart';
import 'data/services/market_service.dart';
import 'data/services/trade_service.dart';
import 'data/services/asset_service.dart';
import 'data/services/fund_service.dart';
import 'data/services/bonus_service.dart';
import 'data/services/config_service.dart';
import 'providers/auth_provider.dart';
import 'providers/market_provider.dart';
import 'providers/asset_provider.dart';
import 'providers/trade_provider.dart';
import 'providers/theme_provider.dart';
import 'ui/pages/auth/login_page.dart';
import 'ui/pages/main/main_page.dart';
import 'ui/pages/onboarding/onboarding_page.dart';

/// 全局導航 Key，用於從任意位置跳轉到登錄頁
final GlobalKey<NavigatorState> navigatorKey = GlobalKey<NavigatorState>();

void main() async {
  // 確保 Flutter 綁定初始化
  WidgetsFlutterBinding.ensureInitialized();

  // 防截图：Android 端通过 FLAG_SECURE（在 MainActivity 中已设置）
  // Web 端通过 index.html 中的 JS/CSS 防护
  // iOS 端暂无原生防截图能力（Web 模式下同样由 JS 保护）

  // 全局錯誤處理 - Flutter 框架錯誤
  FlutterError.onError = (FlutterErrorDetails details) {
    FlutterError.presentError(details);
  };

  // 全局錯誤處理 - 異步未捕獲錯誤
  PlatformDispatcher.instance.onError = (error, stack) {
    return true;
  };

  Provider.debugCheckInvalidValueType = null;

  try {
    await SharedPreferences.getInstance();
    await LocalStorage.init();

    // 域名導航：Debug 用 localhost，Release 競速 CF Workers
    final resolvedUrl = await DomainNavigator.init();
    ApiEndpoints.init(resolvedUrl);

  } catch (e, stack) {
    // 域名解析失敗時使用兜底地址
    ApiEndpoints.init(DomainNavigator.activeUrl);
  }

  runApp(const MyApp());
}

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

  @override
  Widget build(BuildContext context) {
    return MultiProvider(
      providers: _buildProviders(),
      child: Consumer<ThemeProvider>(
        builder: (context, themeProvider, _) {
          return _buildMaterialApp(context, themeProvider.themeMode);
        },
      ),
    );
  }

  List<SingleChildWidget> _buildProviders() {
    final dioClient = DioClient();

    return [
      // Theme Provider (必須放在最前面)
      ChangeNotifierProvider<ThemeProvider>(
        create: (_) => ThemeProvider()..init(),
      ),
      // Services
      Provider<DioClient>.value(value: dioClient),
      Provider<AppEventBus>(create: (_) => AppEventBus()),
      Provider<UserService>(create: (_) => UserService(dioClient)),
      Provider<MarketService>(create: (_) => MarketService(dioClient)),
      Provider<TradeService>(create: (_) => TradeService(dioClient)),
      Provider<AssetService>(create: (_) => AssetService(dioClient)),
      Provider<FundService>(create: (_) => FundService(dioClient)),
      Provider<BonusService>(create: (_) => BonusService(dioClient)),
      Provider<ConfigService>(create: (_) => ConfigService(dioClient)),
      // State Management
      ChangeNotifierProvider<AuthProvider>(
        create: (ctx) {
          final authProvider = AuthProvider(ctx.read<UserService>());
          // token 過期時，DioClient 回調 AuthProvider 強制登出
          dioClient.onUnauthorized = authProvider.forceLogout;
          return authProvider;
        },
      ),
      ChangeNotifierProvider<MarketProvider>(
        create: (ctx) => MarketProvider(ctx.read<MarketService>()),
      ),
      ChangeNotifierProvider<AssetProvider>(
        create: (ctx) => AssetProvider(
          ctx.read<AssetService>(),
          ctx.read<FundService>(),
          ctx.read<TradeService>(),
          ctx.read<AppEventBus>(),
        ),
      ),
      ChangeNotifierProvider<TradeProvider>(
        create: (ctx) => TradeProvider(
          ctx.read<MarketService>(),
          ctx.read<TradeService>(),
        ),
      ),
    ];
  }

  Widget _buildMaterialApp(BuildContext context, ThemeMode themeMode) {
    return MaterialApp(
      navigatorKey: navigatorKey,
      debugShowCheckedModeBanner: false,
      theme: AppTheme.lightTheme,
      darkTheme: AppTheme.darkTheme,
      themeMode: themeMode,
      localizationsDelegates: const [
        GlobalMaterialLocalizations.delegate,
        GlobalCupertinoLocalizations.delegate,
        GlobalWidgetsLocalizations.delegate,
      ],
      builder: (context, child) {
        // 配置 BotToast 確保顯示在所有內容之上
        final botToastBuilder = BotToastInit();
        child = botToastBuilder(context, child);
        return child;
      },
      navigatorObservers: [BotToastNavigatorObserver()],
      initialRoute: '/',
      routes: {
        '/': (context) => const RootPage(),
        '/login': (context) => const LoginPage(),
        '/main': (context) => const MainPage(),
      },
    );
  }
}

/// 根頁面 - 決定顯示引導頁還是主頁面
class RootPage extends StatelessWidget {
  const RootPage({super.key});

  @override
  Widget build(BuildContext context) {
    // 檢查是否需要顯示引導頁
    if (!LocalStorage.isOnboardingCompleted) {
      return OnboardingPage(
        onComplete: () {
          Navigator.of(context).pushReplacementNamed('/login');
        },
      );
    }

    return Consumer<AuthProvider>(
      builder: (context, auth, _) {
        if (auth.isLoading) {
          return const Scaffold(
            body: Center(child: CircularProgressIndicator()),
          );
        }
        return auth.isLoggedIn ? const MainPage() : const LoginPage();
      },
    );
  }
}