import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import '../blocs/auth/auth_bloc.dart';
import '../blocs/auth/auth_event.dart';
import '../blocs/auth/auth_state.dart';

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

  @override
  State<SignUpPage> createState() => _SignUpPageState();
}

class _SignUpPageState extends State<SignUpPage> {
  final _formKey = GlobalKey<FormState>();
  final _nomController = TextEditingController();
  final _prenomController = TextEditingController();
  final _emailController = TextEditingController();
  final _passwordController = TextEditingController();
  final _confirmPasswordController = TextEditingController();

  bool _obscurePassword = true;
  bool _obscureConfirmPassword = true;

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

  String? _validateField(String? value, String fieldName) {
    if (value == null || value.trim().isEmpty) {
      return '$fieldName est requis';
    }
    return null;
  }

  String? _validateEmail(String? value) {
    if (value == null || value.trim().isEmpty) {
      return 'Email est requis';
    }
    final emailRegex = RegExp(r'^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$');
    if (!emailRegex.hasMatch(value.trim())) {
      return 'Email invalide';
    }
    return null;
  }

  String? _validatePassword(String? value) {
    if (value == null || value.isEmpty) {
      return 'Mot de passe est requis';
    }
    if (value.length < 8) {
      return 'Le mot de passe doit contenir au moins 8 caractères';
    }
    return null;
  }

  String? _validateConfirmPassword(String? value) {
    if (value == null || value.isEmpty) {
      return 'Confirmation du mot de passe requise';
    }
    if (value != _passwordController.text) {
      return 'Les mots de passe ne correspondent pas';
    }
    return null;
  }

  void _signUp(BuildContext context) {
    if (!_formKey.currentState!.validate()) {
      return;
    }

    context.read<AuthBloc>().add(
          AuthSignUpRequested(
            email: _emailController.text.trim(),
            password: _passwordController.text,
            nom: _nomController.text.trim(),
            prenom: _prenomController.text.trim(),
          ),
        );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        leading: IconButton(
          icon: const Icon(Icons.arrow_back),
          onPressed: () => Navigator.pop(context),
        ),
        backgroundColor: Colors.transparent,
        elevation: 0,
      ),
      body: BlocConsumer<AuthBloc, AuthState>(
        listener: (context, state) {
          if (state is AuthAuthenticated) {
            ScaffoldMessenger.of(context).showSnackBar(
              const SnackBar(
                content: Text('Compte créé avec succès !'),
                backgroundColor: Colors.green,
              ),
            );
            Navigator.pushReplacementNamed(context, '/home');
          } else if (state is AuthError) {
            ScaffoldMessenger.of(context).showSnackBar(
              SnackBar(
                content: Text(state.message),
                backgroundColor: Colors.red,
              ),
            );
          }
        },
        builder: (context, state) {
          final isLoading = state is AuthLoading;

          return SafeArea(
            child: SingleChildScrollView(
              child: Padding(
                padding: const EdgeInsets.all(16.0),
                child: Form(
                  key: _formKey,
                  child: Column(
                    children: [
                      const SizedBox(height: 40),
                      const Text(
                        'Créer un compte',
                        style: TextStyle(fontSize: 24, fontWeight: FontWeight.bold),
                      ),
                      const SizedBox(height: 12),
                      const Text(
                        'Rejoignez Travel Mate',
                        style: TextStyle(fontSize: 16, color: Colors.grey),
                      ),
                      const SizedBox(height: 40),

                      // Champ Prénom
                      TextFormField(
                        controller: _prenomController,
                        validator: (value) => _validateField(value, 'Prénom'),
                        decoration: const InputDecoration(
                          labelText: 'Prénom',
                          border: OutlineInputBorder(
                            borderRadius: BorderRadius.all(Radius.circular(12)),
                          ),
                          prefixIcon: Icon(Icons.person_outline),
                        ),
                      ),
                      const SizedBox(height: 20),

                      // Champ Nom
                      TextFormField(
                        controller: _nomController,
                        validator: (value) => _validateField(value, 'Nom'),
                        decoration: const InputDecoration(
                          labelText: 'Nom',
                          border: OutlineInputBorder(
                            borderRadius: BorderRadius.all(Radius.circular(12)),
                          ),
                          prefixIcon: Icon(Icons.person),
                        ),
                      ),
                      const SizedBox(height: 20),

                      // Champ Email
                      TextFormField(
                        controller: _emailController,
                        validator: _validateEmail,
                        keyboardType: TextInputType.emailAddress,
                        decoration: const InputDecoration(
                          labelText: 'Email',
                          border: OutlineInputBorder(
                            borderRadius: BorderRadius.all(Radius.circular(12)),
                          ),
                          prefixIcon: Icon(Icons.email),
                        ),
                      ),
                      const SizedBox(height: 20),

                      // Champ Mot de passe
                      TextFormField(
                        controller: _passwordController,
                        validator: _validatePassword,
                        obscureText: _obscurePassword,
                        decoration: InputDecoration(
                          labelText: 'Mot de passe',
                          border: const OutlineInputBorder(
                            borderRadius: BorderRadius.all(Radius.circular(12)),
                          ),
                          prefixIcon: const Icon(Icons.lock),
                          suffixIcon: IconButton(
                            icon: Icon(
                              _obscurePassword
                                  ? Icons.visibility
                                  : Icons.visibility_off,
                            ),
                            onPressed: () {
                              setState(() {
                                _obscurePassword = !_obscurePassword;
                              });
                            },
                          ),
                        ),
                      ),
                      const SizedBox(height: 20),

                      // Champ Confirmation mot de passe
                      TextFormField(
                        controller: _confirmPasswordController,
                        validator: _validateConfirmPassword,
                        obscureText: _obscureConfirmPassword,
                        decoration: InputDecoration(
                          labelText: 'Confirmez le mot de passe',
                          border: const OutlineInputBorder(
                            borderRadius: BorderRadius.all(Radius.circular(12)),
                          ),
                          prefixIcon: const Icon(Icons.lock_outline),
                          suffixIcon: IconButton(
                            icon: Icon(
                              _obscureConfirmPassword
                                  ? Icons.visibility
                                  : Icons.visibility_off,
                            ),
                            onPressed: () {
                              setState(() {
                                _obscureConfirmPassword = !_obscureConfirmPassword;
                              });
                            },
                          ),
                        ),
                      ),
                      const SizedBox(height: 30),

                      // Bouton d'inscription
                      SizedBox(
                        width: double.infinity,
                        height: 50,
                        child: ElevatedButton(
                          onPressed: isLoading ? null : () => _signUp(context),
                          style: ElevatedButton.styleFrom(
                            shape: RoundedRectangleBorder(
                              borderRadius: BorderRadius.circular(12),
                            ),
                          ),
                          child: isLoading
                              ? const CircularProgressIndicator(color: Colors.white)
                              : const Text('S\'inscrire', style: TextStyle(fontSize: 18)),
                        ),
                      ),
                      const SizedBox(height: 20),

                      // Lien vers login
                      Row(
                        mainAxisAlignment: MainAxisAlignment.center,
                        children: [
                          const Text("Déjà un compte ? "),
                          GestureDetector(
                            onTap: () => Navigator.pop(context),
                            child: const Text(
                              'Connectez-vous !',
                              style: TextStyle(
                                color: Colors.blue,
                                fontWeight: FontWeight.bold,
                              ),
                            ),
                          ),
                        ],
                      ),
                    ],
                  ),
                ),
              ),
            ),
          );
        },
      ),
    );
  }
}