import 'package:firebase_auth/firebase_auth.dart';
import 'package:firebase_ui_auth/firebase_ui_auth.dart';
import 'package:flutter/material.dart';
import 'package:telemednet/user_check_screen.dart';

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

  @override
  State<LaunchScreen> createState() => _LaunchScreenState();
}

class _LaunchScreenState extends State<LaunchScreen> {
  @override
  void initState() {
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('TelemedNet'),
      ),
      body: StreamBuilder(
          stream: FirebaseAuth.instance.authStateChanges(),
          builder: (BuildContext context, AsyncSnapshot<User?> snapshot) {
            if (snapshot.connectionState == ConnectionState.waiting) {
              return const Center(
                child: CircularProgressIndicator(),
              );
            } else if (snapshot.hasData) {
              return const UserCheckScreen();
            } else {
              return const SignInScreen();
            }
          }),
    );
  }
}