import 'package:flutter/material.dart';
import 'package:firebase_auth/firebase_auth.dart';

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

  @override
  State<LoginPage> createState() => _LoginPageState();
}

class _LoginPageState extends State<LoginPage> {
  final _emailController = TextEditingController();
  final _passwordController = TextEditingController();
  String _errorMessage = '';
  bool _isLoading = false;

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

  Future<void> _signInWithEmailAndPassword() async {
    setState(() {
      _errorMessage = '';
      _isLoading = true;
    });
    try {
      await FirebaseAuth.instance.signInWithEmailAndPassword(
        email: _emailController.text.trim(),
        password: _passwordController.text,
      );
      // Navigation vers la page principale après connexion réussie (à implémenter)
      // Par exemple : Navigator.of(context).pushReplacementNamed('/home');
    } on FirebaseAuthException catch (e) {
      setState(() {
        _errorMessage = "Erreur de connexion: ${e.message}";
        _isLoading = false;
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Connexion'),
      ),
      body: Center(
        child: SingleChildScrollView(
          // Pour éviter le débordement sur les petits écrans
          padding: const EdgeInsets.all(20.0),
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              Image.asset(
                'assets/EM2_NsurB.jpg',
                height: 150,
              ),
              const SizedBox(height: 20),
              const Text(
                'Bienvenue !',
                style: TextStyle(fontSize: 24, fontWeight: FontWeight.bold),
              ),
              const SizedBox(height: 20),
              TextField(
                controller: _emailController,
                keyboardType: TextInputType.emailAddress,
                decoration: const InputDecoration(
                  labelText: 'Email',
                  border: OutlineInputBorder(),
                ),
              ),
              const SizedBox(height: 10),
              TextField(
                controller: _passwordController,
                obscureText: true,
                decoration: const InputDecoration(
                  labelText: 'Mot de passe',
                  border: OutlineInputBorder(),
                ),
              ),
              const SizedBox(height: 20),
              ElevatedButton(
                onPressed: _isLoading
                    ? null
                    : _signInWithEmailAndPassword, // Désactiver pendant le chargement
                child: _isLoading
                    ? const CircularProgressIndicator() // Indicateur de chargement
                    : const Text('Se connecter'),
              ),
              const SizedBox(height: 10),
              const SizedBox(height: 10),
              if (_errorMessage.isNotEmpty)
                Text(
                  _errorMessage,
                  style: const TextStyle(color: Colors.red),
                ),
            ],
          ),
        ),
      ),
    );
  }
}