import 'dart:async';
import 'dart:ui';

import 'package:firebase_analytics/firebase_analytics.dart';
import 'package:firebase_analytics/observer.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:firebase_crashlytics/firebase_crashlytics.dart';
import 'package:flutter/material.dart';
import 'package:google_fonts/google_fonts.dart';
import 'package:hive_flutter/hive_flutter.dart';
import 'package:provider/provider.dart';

import 'adstools/firebase_optiongs.dart';
import 'services/hydration_service.dart';
import 'widgets/main_navigation_frame.dart';

bool isFirebaseInitialized = false;

void main() async {
  runZonedGuarded<Future<void>>(() async {
    WidgetsFlutterBinding.ensureInitialized();

    try {
      await Firebase.initializeApp(
        options: DefaultFirebaseOptions.currentPlatform,
      ).timeout(const Duration(seconds: 15)); // 设置15秒超时
      print("✅ Firebase 初始化成功。");
      isFirebaseInitialized = true; // 成功后设置标志
    } on TimeoutException {
      print("⚠️ Firebase 初始化超时 (超过15秒)，应用将继续运行但相关功能将不可用。");
    } catch (error, stack) {
      print("!!!!!!!!!! Firebase 初始化失败 !!!!!!!!!!: $error");
      FirebaseCrashlytics.instance.recordError(error, stack, fatal: false);
    }

    // Firebase 成功初始化后，配置依赖它的服务
    if (isFirebaseInitialized) {
      //设置全局错误处理器
      FlutterError.onError = FirebaseCrashlytics.instance.recordFlutterError;
      PlatformDispatcher.instance.onError = (error, stack) {
        FirebaseCrashlytics.instance.recordError(error, stack, fatal: true);
        return true;
      };
      // 使用我们的安全服务来记录 App Open
      AnalyticsService.instance.logAppOpen();
    }

    await Hive.initFlutter();
    await Hive.openBox('hydrationData');
    await Hive.openBox('userSettings');

    final analyticsObserver = SafeFirebaseAnalyticsObserver();
    runApp(
      MultiProvider(
        providers: [ChangeNotifierProvider(create: (_) => HydrationService())],
        child: BioFluxApp(analyticsObserver: analyticsObserver),
      ),
    );
  }, (e, s) {});
}

class BioFluxApp extends StatelessWidget {
  final NavigatorObserver analyticsObserver;

  const BioFluxApp({super.key, required this.analyticsObserver});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'BioFlux',
      navigatorObservers: [analyticsObserver],
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        useMaterial3: true,
        scaffoldBackgroundColor: const Color(0xFFF0F8FF),
        colorScheme: ColorScheme.fromSeed(
          seedColor: const Color(0xFF00BFFF),
          background: const Color(0xFFF0F8FF),
        ),
        textTheme: GoogleFonts.latoTextTheme(Theme.of(context).textTheme)
            .copyWith(
              displayLarge: GoogleFonts.montserrat(),
              displayMedium: GoogleFonts.montserrat(),
              titleLarge: GoogleFonts.montserrat(fontWeight: FontWeight.w600),
              titleMedium: GoogleFonts.montserrat(fontWeight: FontWeight.w600),
              bodyLarge: GoogleFonts.lato(),
              bodyMedium: GoogleFonts.lato(),
            ),
      ),
      home: const MainNavigationFrame(),
    );
  }
}

class AnalyticsService {
  // 单例模式
  AnalyticsService._();

  static final instance = AnalyticsService._();

  final _analytics = FirebaseAnalytics.instance;

  /// 安全地记录一个 App Open 事件。
  void logAppOpen() {
    if (isFirebaseInitialized) {
      _analytics.logAppOpen();
    } else {
      print("[AnalyticsService] Skipped logAppOpen: Firebase not initialized.");
    }
  }
}

/// 一个安全的 FirebaseAnalyticsObserver 包装器。它只在 Firebase 初始化成功时才转发导航事件。
class SafeFirebaseAnalyticsObserver extends NavigatorObserver {
  late final FirebaseAnalyticsObserver _observer;

  SafeFirebaseAnalyticsObserver() {
    if (isFirebaseInitialized) {
      _observer = FirebaseAnalyticsObserver(
        analytics: AnalyticsService.instance._analytics,
      );
    }
  }

  @override
  void didPush(Route<dynamic> route, Route<dynamic>? previousRoute) {
    if (isFirebaseInitialized) {
      _observer.didPush(route, previousRoute);
    }
  }

  @override
  void didPop(Route<dynamic> route, Route<dynamic>? previousRoute) {
    if (isFirebaseInitialized) {
      _observer.didPop(route, previousRoute);
    }
  }

  @override
  void didReplace({Route<dynamic>? newRoute, Route<dynamic>? oldRoute}) {
    if (isFirebaseInitialized) {
      _observer.didReplace(newRoute: newRoute, oldRoute: oldRoute);
    }
  }
}