import 'package:firebase_auth/firebase_auth.dart';
import 'package:flutter/material.dart';
// import 'package:foodshare/screens/start.dart';
import 'package:google_sign_in/google_sign_in.dart';

class HomePage extends StatefulWidget {
  @override
  _HomePageState createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  final FirebaseAuth _auth = FirebaseAuth.instance;
  late User user;
  bool isloggedin = false;

  checkAuthentification() async {
    _auth.authStateChanges().listen((user) {
      if (user == null) {
        Navigator.of(context).pushReplacementNamed("start");
      }
    });
  }

  getUser() async {
    User? firebaseUser = _auth.currentUser;
    await firebaseUser?.reload();
    firebaseUser = _auth.currentUser;

    if (firebaseUser != null) {
      setState(() {
        this.user = firebaseUser!;
        this.isloggedin = true;
      });
    }
  }

  signOut() async {
    _auth.signOut();

    final googleSignIn = GoogleSignIn();
    await googleSignIn.signOut();
  }

  @override
  void initState() {
    super.initState();
    this.checkAuthentification();
    this.getUser();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Container(
        child: !isloggedin
            ? CircularProgressIndicator()
            : Column(
                children: <Widget>[
                  SizedBox(height: 40.0),
                  Container(
                    height: 300,
                    child: Image(
                      image: AssetImage('assets/images/welcome.jpg'),
                      fit: BoxFit.contain,
                    ),
                  ),
                  Container(
                    child: Text(
                      "Hello ${user.displayName} you are Logged in as ${user.email}",
                      style: TextStyle(
                        fontSize: 20.0,
                        fontWeight: FontWeight.bold,
                      ),
                    ),
                  ),
                  ElevatedButton(
                    onPressed: signOut,
                    child: Text(
                      'Signout',
                      style: TextStyle(
                        fontSize: 20.0,
                        fontWeight: FontWeight.bold,
                        color: Colors.white,
                      ),
                    ),
                    style: ElevatedButton.styleFrom(
                      padding: EdgeInsets.only(
                        left: 70.0,
                        right: 10.0,
                        top: 70.0,
                        bottom: 10.0,
                      ),
                      shape: RoundedRectangleBorder(
                        borderRadius: BorderRadius.circular(10.0),
                      ),
                      primary: Theme.of(context).primaryColor,
                    ),
                  ),
                ],
              ),
      ),
    );
  }
}