// main.dart - 优化版本
// 保留设备信息加载，但优化初始化流程

import 'dart:async';
import 'dart:developer' as dev;
import 'dart:io';

import 'package:device_info_plus/device_info_plus.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:firebase_crashlytics/firebase_crashlytics.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:logging/logging.dart';
import 'package:path_provider/path_provider.dart';
import 'package:provider/provider.dart';
import 'package:puzzleweave/ads/applovin_ads_controller.dart';
import 'package:puzzleweave/app_lifecycle/app_lifecycle.dart';
import 'package:puzzleweave/audio/jc_audio_controller.dart';
import 'package:puzzleweave/firebase/firebase_options.dart';
import 'package:puzzleweave/homepage/home_screen.dart';
import 'package:puzzleweave/l10n/app_localizations.dart';
import 'package:puzzleweave/models/data.dart';
import 'package:puzzleweave/models/items.dart';
import 'package:puzzleweave/persistence/persistence.dart';
import 'package:puzzleweave/play/board_play.dart';
import 'package:puzzleweave/remote_config/remote_config.dart';
import 'package:puzzleweave/settings/settings_controller.dart';
import 'package:puzzleweave/utils/utils.dart';
import 'package:puzzleweave/utils/memory_monitor.dart';
import 'package:flutter_native_splash/flutter_native_splash.dart';
import 'package:puzzleweave/firebase/adjust_helper.dart';
import 'package:firebase_messaging/firebase_messaging.dart';

import 'config/config.dart' as cfg;
import 'config/config.dart';
import 'config/device.dart';

Logger _log = Logger('main.dart');

final RouteObserver<PageRoute> routeObserver = RouteObserver<PageRoute>();

// ✅ 优化点1: 移除所有阻塞性 await
void main() {
  // Subscribe to log messages.
  Logger.root.onRecord.listen((record) {
    dev.log(
      record.message,
      time: record.time,
      level: record.level.value,
      name: record.loggerName,
      zone: record.zone,
      error: record.error,
      stackTrace: record.stackTrace,
    );
  });

  WidgetsBinding widgetsBinding = WidgetsFlutterBinding.ensureInitialized();

  // 保持原生闪屏，直到我们完成所有阻塞性初始化后才移除
  FlutterNativeSplash.preserve(widgetsBinding: widgetsBinding);

  // 强制竖屏
  SystemChrome.setPreferredOrientations([DeviceOrientation.portraitUp, DeviceOrientation.portraitDown]);

  // 进入全屏沉浸式
  if (Platform.isAndroid) {
    SystemChrome.setEnabledSystemUIMode(SystemUiMode.immersiveSticky);
  }

  SystemChrome.setSystemUIOverlayStyle(
    const SystemUiOverlayStyle(statusBarColor: Colors.transparent, statusBarIconBrightness: Brightness.dark, statusBarBrightness: Brightness.light),
  );

  // ✅ 立即启动 UI，不等待任何异步初始化
  runApp(const MyApp());
}

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

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

class _MyAppState extends State<MyApp> {
  bool _isInitialized = false;
  String? _initError;
  late Directory _baseDir;

  @override
  void initState() {
    super.initState();
    _initializeAsync();
  }

  // ✅ 优化点2: 并行初始化，减少总时间
  Future<void> _initializeAsync() async {
    try {
      // 1. 先初始化不会被阻塞的并发任务
      final results = await Future.wait([_initFirebase(), _initPersistence(), _initBaseDirectory()], eagerError: false);
      _baseDir = results[2] as Directory;

      // 非阻塞性初始化（不等待完成）
      _initRemoteConfig();
      _prepareFirstRunData();

      setState(() {
        _isInitialized = true;
      });

      // 关键：一切就绪后，移除原生闪屏并进场！
      FlutterNativeSplash.remove();

      // 启动内存监控
      if (Config.isDebug) {
        MemoryMonitor().startMonitoring(
          interval: const Duration(seconds: 3),
          onHighMemory: () => _log.warning('High memory detected'),
          onCriticalMemory: () => _log.severe('Critical memory - emergency cleanup triggered'),
        );
      }

      _log.info('App initialization completed successfully');
    } catch (e, stack) {
      _log.severe('App initialization failed', e, stack);
      setState(() {
        _initError = e.toString();
        _isInitialized = true; // 即使失败也显示 UI
      });
    }
  }

  // ✅ 优化点3: Firebase 初始化独立，带超时保护
  Future<void> _initFirebase() async {
    if (kIsWeb || !Platform.isAndroid) return;

    try {
      await Firebase.initializeApp(options: DefaultFirebaseOptions.currentPlatform).timeout(Duration(seconds: 10));

      // 提取网络环境/连接异常的判断逻辑，共用
      bool isEnvIssue(dynamic error, String errorStr) {
        return error is SocketException ||
            error is HttpException ||
            error is HandshakeException ||
            errorStr.contains('ClientException') ||
            errorStr.contains('SocketException') ||
            errorStr.contains('HandshakeException') ||
            errorStr.contains('Failed host lookup') ||
            errorStr.contains('Network is unreachable') ||
            errorStr.contains('Connection timed out') ||
            errorStr.contains('Connection closed') ||
            errorStr.contains('Connection reset') ||
            errorStr.contains('Software caused connection abort') ||
            errorStr.contains('Unable to connect') ||
            errorStr.contains('Downloaded data is too small');
      }

      FlutterError.onError = (errorDetails) {
        final errorStr = errorDetails.exceptionAsString();
        if (isEnvIssue(errorDetails.exception, errorStr)) {
          _log.warning('已拦截 UI 渲染层网络异常(不视为崩溃): $errorStr');
          FirebaseCrashlytics.instance.log('Env UI Error (Ignored): $errorStr');
          return;
        }
        FirebaseCrashlytics.instance.recordFlutterFatalError(errorDetails);
      };

      PlatformDispatcher.instance.onError = (error, stack) {
        final errorStr = error.toString();

        if (isEnvIssue(error, errorStr)) {
          _log.warning('已拦截底层网络环境异常: $errorStr');
          FirebaseCrashlytics.instance.log('Env Error (Ignored): $errorStr');
          return true;
        }

        if (error is MissingPluginException) {
          _log.warning('插件未找到: $errorStr');
          return true;
        }

        _log.severe('未处理的逻辑错误', error, stack);
        FirebaseCrashlytics.instance.recordError(error, stack, fatal: false);

        return true;
      };

      _log.info('Firebase initialized successfully');
    } catch (e) {
      _log.warning("Firebase initialization failed: $e");
    }
  }

  Future<void> _initPersistence() async {
    try {
      await Persistence().initialize().timeout(Duration(seconds: 5));
      Persistence().lastRunTime = DateTime.now();
      _log.info('Persistence initialized successfully');
    } catch (e) {
      _log.severe('Persistence initialization failed: $e');
      rethrow;
    }
  }

  Future<Directory> _initBaseDirectory() async {
    try {
      return await getApplicationDocumentsDirectory();
    } catch (e) {
      _log.severe('Failed to get base directory: $e');
      rethrow;
    }
  }

  void _initRemoteConfig() {
    try {
      RemoteConfig().initialize();
      _log.info('RemoteConfig initialized');
    } catch (e) {
      _log.warning('RemoteConfig initialization failed: $e');
    }
  }

  Future<void> _prepareFirstRunData() async {
    if (!Persistence().firstRun) return;

    try {
      final json = await loadJSONFromAsset('assets/builtin/${cfg.Config.firstId}.json');
      await saveJson('work/${cfg.Config.firstId}.json', json);
      _log.info('First run data prepared');
    } catch (e) {
      _log.warning('Failed to prepare first run data: $e');
    }
  }

  @override
  Widget build(BuildContext context) {
    // 显示加载界面
    if (!_isInitialized) {
      return MaterialApp(
        home: Scaffold(
          backgroundColor: Color(0xfff4f2e9),
          body: Center(
            child: Column(
              mainAxisAlignment: MainAxisAlignment.center,
              children: [
                // 使用原生最轻量的进度指示器
                SizedBox(width: 40, height: 40, child: CircularProgressIndicator(strokeWidth: 3, valueColor: AlwaysStoppedAnimation<Color>(Colors.green))),
                const SizedBox(height: 20),
                // 可选：添加一个简单的文字，让用户知道在加载
                Text(
                  "Loading...",
                  style: TextStyle(color: Color.fromARGB(255, 38, 96, 12), fontSize: 14, fontWeight: FontWeight.w500),
                ),
              ],
            ),
          ),
        ),
      );
    }

    // 初始化失败时显示错误界面
    if (_initError != null) {
      return MaterialApp(
        home: Scaffold(
          backgroundColor: Color(0xfff4f2e9),
          body: Center(
            child: Padding(
              padding: EdgeInsets.all(24),
              child: Column(
                mainAxisAlignment: MainAxisAlignment.center,
                children: [
                  Icon(Icons.error_outline, size: 64, color: Colors.red),
                  SizedBox(height: 16),
                  Text('Initialization Failed', style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold)),
                  SizedBox(height: 8),
                  Text(
                    _initError!,
                    textAlign: TextAlign.center,
                    style: TextStyle(color: Colors.grey),
                  ),
                  SizedBox(height: 24),
                  ElevatedButton(
                    onPressed: () {
                      setState(() {
                        _isInitialized = false;
                        _initError = null;
                      });
                      _initializeAsync();
                    },
                    child: Text('Retry'),
                  ),
                ],
              ),
            ),
          ),
        ),
      );
    }

    // 正常启动应用
    cfg.Config config = cfg.Config(context, _baseDir);
    return AppLifecycleObserver(
      child: MultiProvider(
        providers: [
          Provider<Data>(lazy: false, create: (context) => Data(persistence: Persistence())..loadDataFromPersistence()),
          Provider<SettingsController>(lazy: false, create: (context) => SettingsController(persistence: Persistence())..loadStateFromPersistence()),
          ProxyProvider2<SettingsController, ValueNotifier<AppLifecycleState>, JcAudioController>(
            lazy: false,
            create: (context) => JcAudioController()..initialize(),
            update: (context, settings, lifecycleNotifier, audio) {
              if (audio == null) throw ArgumentError.notNull();
              audio.attachSettings(settings);
              audio.attachLifecycleNotifier(lifecycleNotifier);
              return audio;
            },
            dispose: (context, audio) => audio.dispose(),
          ),
          Provider<ApplovinAdsController>(create: (context) => ApplovinAdsController(context)),
          Provider<cfg.Config>(lazy: false, create: (context) => config),
          Provider<Device>(lazy: false, create: (context) => config.device),
        ],
        child: Prepare(
          child: MaterialApp(
            title: 'Jigsort Solitaire',
            initialRoute: '/',
            navigatorObservers: [routeObserver],
            routes: {
              '/': (context) => const HomeScreen(),
              '/play': (context) => BoardPlay(
                item: AssetItem(
                  cfg.Config.firstId,
                  '',
                  2000,
                  3000,
                  3,
                  false,
                  'assets/builtin/${cfg.Config.firstId}.jpeg',
                  'assets/builtin/${cfg.Config.firstId}.jpeg',
                ),
                firstRun: true,
              ),
            },
            theme: ThemeData(brightness: Brightness.light, primaryColor: Colors.green, primarySwatch: Colors.blue),
            localizationsDelegates: AppLocalizations.localizationsDelegates,
            supportedLocales: AppLocalizations.supportedLocales,
            localeResolutionCallback: (Locale? locale, Iterable<Locale> supportedLocales) {
              var result = supportedLocales.where((element) => element.languageCode == locale?.languageCode);
              if (result.isNotEmpty) {
                Device.locale = locale!;
                _log.info('当前语言(支持)：${Device.locale!.countryCode}-${Device.locale!.languageCode}');
                return locale;
              }
              Device.locale = const Locale('en');
              _log.info('当前语言(默认)：${Device.locale!.countryCode}-${Device.locale!.languageCode}');
              return Device.locale;
            },
          ),
        ),
      ),
    );
  }
}

class Prepare extends StatefulWidget {
  final Widget child;
  const Prepare({super.key, required this.child});

  @override
  State<Prepare> createState() => _PrepareState();
}

class _PrepareState extends State<Prepare> {
  @override
  void initState() {
    super.initState();
    // ✅ 保留：异步加载设备信息（不阻塞 UI）
    _loadDeviceInfo();
  }

  /// ✅ 优化：异步加载设备信息，不阻塞 UI
  Future<void> _loadDeviceInfo() async {
    if (!Platform.isAndroid) return;

    try {
      final deviceInfoPlugin = DeviceInfoPlugin();
      final androidInfo = await deviceInfoPlugin.androidInfo;

      if (mounted) {
        context.read<Device>().androidDeviceInfo = androidInfo;
        _log.info(
          'Device info loaded: SDK ${androidInfo.version.sdkInt}, '
          'LowRAM: ${androidInfo.isLowRamDevice}, '
          'CPUs: ${Platform.numberOfProcessors}',
        );
      }
    } catch (e) {
      _log.warning('Failed to load device info: $e');
      // 失败不影响应用运行
    }
  }

  @override
  Widget build(BuildContext context) {
    return widget.child;
  }
}