myhomie_app/lib/main.dart

import 'package:firebase_messaging/firebase_messaging.dart';
import 'package:flutter/material.dart';
import 'package:myhomie_app/Helpers/PushNotificationService.dart';
import 'package:myhomie_app/client.dart';
import 'package:provider/provider.dart';

import 'Helpers/DatabaseHelper.dart';
import 'Models/homieContext.dart';
import 'Screens/Main/MainPage.dart';
import 'Screens/Login/login_screen.dart';
import 'app_context.dart';
import 'constants.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  String initialRoute;
  HomieAppContext? localContext = new HomieAppContext();
  bool isLogged = false;

  localContext = await DatabaseHelper.instance.getData();

  if(localContext != null) {
    print("we've got an local db !");
    localContext.clientAPI = new Client(localContext.host!); // TODO "http://192.168.31.140"
    //isLogged = localContext.token != null; // TODO refresh token..
    isLogged = false;
    print(localContext);
  } else {
    print("NO LOCAL DB !");
    localContext = HomieAppContext();
  }

  initialRoute = isLogged ? '/home' : '/login';

  final MyApp myApp = MyApp(
    initialRoute: initialRoute,
    homieAppContext: localContext!,
  );

  runApp(myApp);
}

class MyApp extends StatefulWidget {
  String initialRoute = "";
  HomieAppContext homieAppContext;
  MyApp({Key? key, required this.initialRoute, required this.homieAppContext}) : super(key: key);

  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  //FirebaseMessaging _firebaseMessaging = FirebaseMessaging();
  //HomieAppContext homieAppContext;

  @override
  Widget build(BuildContext context) {
    final pushNotificationService = PushNotificationService();
    pushNotificationService.initialise(widget.homieAppContext, context: context);
    return ChangeNotifierProvider<AppContext>(
      create: (_) => AppContext(widget.homieAppContext),
      child: MaterialApp(
          debugShowCheckedModeBanner: false,
          title: 'MyHomie App Demo',
          initialRoute: widget.initialRoute,
          /*supportedLocales: [
            const Locale('en', 'US'),
            //const Locale('fr', 'FR'),
          ],*/
          theme: ThemeData(
            primarySwatch: Colors.blue,
            scaffoldBackgroundColor: kBackgroundColor,
            //fontFamily: "Vollkorn",
            textTheme: TextTheme(bodyText1: TextStyle(color: kBodyTextColor)),
            visualDensity: VisualDensity.adaptivePlatformDensity,
          ),
          routes: {
            '/home': (context) => MainPage(),
            '/login': (context) => LoginScreen()
          }
      ),
    );
  }
}