import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:youmazgestion/Services/stock_managementDatabase.dart';
import 'package:youmazgestion/Views/Dashboard.dart';
import 'package:youmazgestion/Views/mobilepage.dart';
import 'package:youmazgestion/Views/particles.dart' show ParticleBackground;
import 'package:youmazgestion/accueil.dart';
import '../Models/users.dart';
import '../controller/userController.dart';


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

  @override
  _LoginPageState createState() => _LoginPageState();
}

class _LoginPageState extends State<LoginPage> {
  late TextEditingController _usernameController;
  late TextEditingController _passwordController;
  final UserController userController = Get.put(UserController());
  bool _isErrorVisible = false;
  bool _isLoading = false;
  String _errorMessage = 'Nom d\'utilisateur ou mot de passe invalide';

  @override
  void initState() {
    super.initState();
    _usernameController = TextEditingController();
    _passwordController = TextEditingController();
    checkUserCount();
  }

  void checkUserCount() async {
    try {
      final userCount = await AppDatabase.instance.getUserCount();
      print('Nombre d\'utilisateurs trouvés: $userCount');
    } catch (error) {
      print('Erreur lors de la vérification du nombre d\'utilisateurs: $error');
      setState(() {
        _errorMessage = 'Erreur de connexion à la base de données';
        _isErrorVisible = true;
      });
    }
  }

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

  Future<void> saveUserData(Users user, String role, int userId) async {
    try {
      userController.setUserWithCredentials(user, role, userId);
      
      if (user.pointDeVenteId != null) {
        await userController.loadPointDeVenteDesignation();
      }
      
      print('Utilisateur sauvegardé avec point de vente: ${userController.pointDeVenteDesignation}');
    } catch (error) {
      print('Erreur lors de la sauvegarde: $error');
      throw Exception('Erreur lors de la sauvegarde des données utilisateur');
    }
  }

  void _login() async {
    if (_isLoading) return;

    final String username = _usernameController.text.trim();
    final String password = _passwordController.text.trim();

    if (username.isEmpty || password.isEmpty) {
      setState(() {
        _errorMessage =
            'Veuillez saisir le nom d\'utilisateur et le mot de passe';
        _isErrorVisible = true;
      });
      return;
    }

    setState(() {
      _isLoading = true;
      _isErrorVisible = false;
    });

    try {
      print('Tentative de connexion pour: $username');
      final dbInstance = AppDatabase.instance;
      
      try {
        final userCount = await dbInstance.getUserCount();
        print('Base de données accessible, $userCount utilisateurs trouvés');
      } catch (dbError) {
        throw Exception('Impossible d\'accéder à la base de données: $dbError');
      }

      bool isValidUser = await dbInstance.verifyUser(username, password);

      if (isValidUser) {
        Users user = await dbInstance.getUser(username);
        print('Utilisateur récupéré: ${user.username}');
        
        Map<String, dynamic>? userCredentials = 
            await dbInstance.getUserCredentials(username, password);

        if (userCredentials != null) {
          print('Connexion réussie pour: ${user.username}');
          print('Rôle: ${userCredentials['role']}');
          print('ID: ${userCredentials['id']}');
          
          await saveUserData(
            user,
            userCredentials['role'] as String,
            userCredentials['id'] as int,
          );

          // MODIFICATION PRINCIPALE ICI
          if (mounted) {
            if (userCredentials['role'] == 'commercial') {
              // Redirection vers MainLayout pour les commerciaux
              Navigator.pushReplacement(
                context,
                MaterialPageRoute(builder: (context) => const MainLayout()),
              );
            }else{
                Navigator.pushReplacement(
                context,
                MaterialPageRoute(builder: (context) => DashboardPage()),
              );
            }
          }
        } else {
          throw Exception('Erreur lors de la récupération des credentials');
        }
      } else {
        setState(() {
          _errorMessage = 'Nom d\'utilisateur ou mot de passe invalide';
          _isErrorVisible = true;
        });
      }
    } catch (error) {
      setState(() {
        _errorMessage = 'Erreur de connexion: ${error.toString()}';
        _isErrorVisible = true;
      });
    } finally {
      if (mounted) setState(() => _isLoading = false);
    }
  }

  @override
  Widget build(BuildContext context) {
    final Color primaryBlue = const Color(0xFF0033A1);
    final Color accentRed = const Color(0xFFD70000);
    final Color secondaryBlue = const Color(0xFF1976D2);
    final Color primaryColor = primaryBlue;
    final Color accentColor = secondaryBlue;
    final Color cardColor = Colors.white;

    return Scaffold(
      backgroundColor: primaryColor,
      body: ParticleBackground(
        child: Center(
          child: SingleChildScrollView(
            child: Container(
              width: MediaQuery.of(context).size.width < 500
                  ? double.infinity
                  : 400,
              padding:
                  const EdgeInsets.symmetric(horizontal: 24.0, vertical: 32.0),
              decoration: BoxDecoration(
                color: cardColor.withOpacity(0.98),
                borderRadius: BorderRadius.circular(30.0),
                boxShadow: [
                  BoxShadow(
                    color: primaryColor.withOpacity(0.2),
                    blurRadius: 16,
                    spreadRadius: 4,
                    offset: const Offset(0, 8),
                  ),
                ],
              ),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.stretch,
                children: [
                  Center(
                    child: Column(
                      children: [
                        CircleAvatar(
                          radius: 38,
                          backgroundColor: accentColor.withOpacity(0.15),
                          child: Icon(
                            Icons.lock_outline,
                            color: accentColor,
                            size: 50,
                          ),
                        ),
                        const SizedBox(height: 14),
                        Text(
                          'GUYCOM',
                          style: TextStyle(
                            color: primaryColor,
                            fontWeight: FontWeight.bold,
                            fontSize: 28,
                          ),
                        ),
                        const SizedBox(height: 4),
                        Text(
                          'Connectez-vous à votre compte',
                          style: TextStyle(
                            color: primaryColor.withOpacity(.8),
                            fontSize: 16,
                          ),
                        ),
                        Container(
                  padding: const EdgeInsets.symmetric(vertical: 16.0),
                  child: const Icon(
                    Icons.lock_outline,
                    size: 100.0,
                    color: Color.fromARGB(255, 4, 54, 95),
                  ),
                ),
                TextField(
                  controller: _usernameController,
                  enabled: !_isLoading,
                  decoration: InputDecoration(
                    labelText: 'Username',
                    prefixIcon: const Icon(Icons.person, color: Colors.blueAccent),
                    border: OutlineInputBorder(
                      borderRadius: BorderRadius.circular(30.0),
                    ),
                  ),
                ),
                const SizedBox(height: 16.0),
                TextField(
                  controller: _passwordController,
                  enabled: !_isLoading,
                  decoration: InputDecoration(
                    labelText: 'Password',
                    prefixIcon: const Icon(Icons.lock, color: Colors.redAccent),
                    border: OutlineInputBorder(
                      borderRadius: BorderRadius.circular(30.0),
                    ),
                  ),
                  obscureText: true,
                  onSubmitted: (_) => _login(),
                ),
                const SizedBox(height: 16.0),
                Visibility(
                  visible: _isErrorVisible,
                  child: Text(
                    _errorMessage,
                    style: const TextStyle(
                      color: Colors.red,
                      fontSize: 14,
                    ),
                    textAlign: TextAlign.center,
                  ),
                ),
                const SizedBox(height: 16.0),
                ElevatedButton(
                  onPressed: _isLoading ? null : _login,
                  style: ElevatedButton.styleFrom(
                    backgroundColor: const Color(0xFF0015B7),
                    elevation: 5.0,
                    shape: RoundedRectangleBorder(
                      borderRadius: BorderRadius.circular(30.0),
                    ),
                    minimumSize: const Size(double.infinity, 48),
                  ),
                  child: _isLoading
                      ? const SizedBox(
                          height: 20,
                          width: 20,
                          child: CircularProgressIndicator(
                            color: Colors.white,
                            strokeWidth: 2,
                          ),
                        )
                      : const Text(
                          'Se connecter',
                          style: TextStyle(
                            color: Colors.white,
                            fontSize: 16,
                          ),
                        ),
                ),
                        ]
                )
                  )
              ],
            ),
          ),
        ),
      ),
    )
    );
  }
}