TKK_E32232198/lib/main.dart

import 'package:flutter/material.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:firebase_messaging/firebase_messaging.dart';
import 'firebase_options.dart';
import 'page_auth/login.dart';
import 'page2/Controlsystem.dart';
import 'auth/auth_service.dart';

Future<void> firebaseMessagingBackgroundHandler(
  RemoteMessage message,
) async {
  await Firebase.initializeApp(
    options: DefaultFirebaseOptions.currentPlatform,
  );

  debugPrint(
    'Background Message: ${message.notification?.title}',
  );
}
Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();

  await Firebase.initializeApp(
    options: DefaultFirebaseOptions.currentPlatform,
  );

  FirebaseMessaging.onBackgroundMessage(
    firebaseMessagingBackgroundHandler,
  );

  runApp(const MyApp());
}

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Monitoring Amoniak',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: FutureBuilder<bool>(
        future: AuthService.isLoggedIn(),
        builder: (context, snapshot) {
          if (snapshot.connectionState == ConnectionState.waiting) {
            return const LoadingScreen();
          }
          return snapshot.data == true ? const ControlSystem() : const Login();
        },
      ),
    );
  }
}

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

  @override
  Widget build(BuildContext context) {
    return const Scaffold(
      body: Center(
        child: CircularProgressIndicator(
          valueColor: AlwaysStoppedAnimation<Color>(Color(0xFF2476C7)),
        ),
      ),
    );
  }
}