flutter_ecommerce_portal/lib/services/auth_service.dart

import 'package:firebase_auth/firebase_auth.dart';

class AuthService {
  AuthService._();

  static final AuthService instance = AuthService._();
  final FirebaseAuth _auth = FirebaseAuth.instance;

  Stream<User?> authStateChanges() => _auth.authStateChanges();

  User? get currentUser => _auth.currentUser;

  Future<UserCredential> signInWithEmailPassword({
    required String email,
    required String password,
  }) {
    return _auth.signInWithEmailAndPassword(email: email, password: password);
  }

  Future<UserCredential> registerWithEmailPassword({
    required String email,
    required String password,
  }) {
    return _auth.createUserWithEmailAndPassword(
      email: email,
      password: password,
    );
  }

  Future<void> sendPasswordResetEmail(String email) {
    return _auth.sendPasswordResetEmail(email: email);
  }

  Future<UserCredential> signInWithGoogle() {
    final provider = GoogleAuthProvider();
    provider.setCustomParameters({'prompt': 'select_account'});
    return _auth.signInWithPopup(provider);
  }

  Future<UserCredential> signInWithGithub() {
    final provider = GithubAuthProvider();
    return _auth.signInWithPopup(provider);
  }

  Future<void> signOut() {
    return _auth.signOut();
  }
}