import 'dart:async';
import 'package:audioplayers/audioplayers.dart';
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:firebase_messaging/firebase_messaging.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:justmusic/screens/add_friend_screen.dart';
import 'package:justmusic/screens/explanations_screen.dart';
import 'package:justmusic/screens/feed_screen.dart';
import 'package:justmusic/screens/login_screen.dart';
import 'package:justmusic/screens/launching_rocker_screen.dart';
import 'package:justmusic/screens/post_screen.dart';
import 'package:justmusic/screens/profile_screen.dart';
import 'package:justmusic/screens/registration_screen.dart';
import 'package:justmusic/screens/verify_email_screen.dart';
import 'package:justmusic/screens/welcome_screen.dart';
import 'package:justmusic/values/constants.dart';
import 'package:justmusic/view_model/CommentViewModel.dart';
import 'package:justmusic/view_model/MusicViewModel.dart';
import 'package:justmusic/view_model/PostViewModel.dart';
import 'package:justmusic/view_model/UserViewModel.dart';
import 'package:justmusic/model/User.dart' as userJustMusic;
import 'firebase_options.dart';
import 'package:timezone/data/latest.dart' as tz;

Future<void> main() async {
  tz.initializeTimeZones();
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp(
    options: DefaultFirebaseOptions.currentPlatform,
  );
  await FirebaseMessaging.instance.requestPermission(sound: true);
  runApp(const MyApp());
}

class MyApp extends StatefulWidget {
  static FirebaseFirestore db = FirebaseFirestore.instance;

  static UserViewModel userViewModel = UserViewModel();
  static MusicViewModel musicViewModel = MusicViewModel();
  static PostViewModel postViewModel = PostViewModel();
  static AudioPlayer audioPlayer = AudioPlayer();
  static CommentViewModel commentViewModel = CommentViewModel();
  static const keyManager = 'customCacheKey';

  const MyApp({super.key});

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

class _MyAppState extends State<MyApp> {
  Strem<> usercurrent;

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

  @override
  void dispose() {
    super.dispose();
  }

  Future<userJustMusic.User?> checkAuth() async {
    try {
      FirebaseAuth.instance.authStateChanges().listen((User? user) async {
        if (user == null) {
          print("User is currently signed out!");
          throw Exception('User is currently signed out!');
        } else {
          print('User is signed in!');
          usercurrent = await MyApp.userViewModel.getUser(FirebaseAuth.instance.currentUser!.uid);
          MyApp.userViewModel.userCurrent = usercurrent!;
          print(usercurrent?.pseudo);
        }
      });
    } catch (e) {
      return null;
    }
    return usercurrent;
  }

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    SystemChrome.setEnabledSystemUIMode(SystemUiMode.immersiveSticky);
    Paint.enableDithering = true;

    return StreamBuilder(
      stream: usercurrent,
      builder: (BuildContext context, snapshot) {
        if (snapshot.hasData) {
          print("has dataaaa");
          return ScreenUtilInit(
            useInheritedMediaQuery: true,
            builder: (context, child) {
              return MaterialApp(
                  routes: {
                    '/welcome': (context) => const WellcomeScreen(),
                    '/feed': (context) => const FeedScreen(),
                    '/login': (context) => const LoginScreen(),
                    '/register': (context) => const RegistrationScreen(),
                    '/post': (context) => const PostScreen(),
                    '/profile': (context) => const ProfileScreen(),
                    '/explanation': (context) => const ExplanationsScreen(),
                    '/addFriend': (context) => const AddFriendScreen(),
                    '/launchingRocket': (context) => const LaunchingRocketScreen(),
                    '/verifyEmail': (context) => const VerifyEmailScreen(),
                  },
                  debugShowCheckedModeBanner: false,
                  theme: ThemeData(
                    primarySwatch: Colors.blue,
                  ),
                  home: usercurrent == null ? WellcomeScreen() : FeedScreen());
            },
            designSize: Size(390, 844),
          );
        } else {
          return Container(
            width: double.infinity,
            height: double.infinity,
            color: bgColor,
            child: Center(
              child: CupertinoActivityIndicator(),
            ),
          );
        }
      },
    );
  }
}