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

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

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

class _LoginPageState extends State<LoginPage> {
  final _formKey = GlobalKey<FormState>();
  final _emailController = TextEditingController();
  final _passwordController = TextEditingController();

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Вход'),
      ),
      body: BlocListener<AuthBloc, AuthState>(
        listener: (context, state) {
          state.whenOrNull(
            authenticated: (userId) {
              Navigator.of(context).popUntil((route) => route.isFirst);
            },
            error: (message) {
              ScaffoldMessenger.of(context).showSnackBar(
                SnackBar(content: Text(message)),
              );
            },
          );
        },
        child: Center(
          child: Padding(
            padding: const EdgeInsets.all(24.0),
            child: Form(
              key: _formKey,
              child: Column(
                mainAxisAlignment: MainAxisAlignment.center,
                crossAxisAlignment: CrossAxisAlignment.stretch,
                children: [
                  const Icon(
                    Icons.chat_bubble_outline,
                    size: 80,
                    color: Color(0xFF2481CC),
                  ),
                  const SizedBox(height: 32),
                  TextFormField(
                    controller: _emailController,
                    decoration: const InputDecoration(
                      labelText: 'Email',
                      prefixIcon: Icon(Icons.email_outlined),
                    ),
                    keyboardType: TextInputType.emailAddress,
                    validator: (value) {
                      if (value == null || value.isEmpty) {
                        return 'Введите email';
                      }
                      if (!value.contains('@')) {
                        return 'Введите корректный email';
                      }
                      return null;
                    },
                  ),
                  const SizedBox(height: 16),
                  TextFormField(
                    controller: _passwordController,
                    decoration: const InputDecoration(
                      labelText: 'Пароль',
                      prefixIcon: Icon(Icons.lock_outlined),
                    ),
                    obscureText: true,
                    validator: (value) {
                      if (value == null || value.isEmpty) {
                        return 'Введите пароль';
                      }
                      if (value.length < 6) {
                        return 'Пароль должен быть не менее 6 символов';
                      }
                      return null;
                    },
                  ),
                  const SizedBox(height: 32),
                  BlocBuilder<AuthBloc, AuthState>(
                    builder: (context, state) {
                      if (state is AuthLoading) {
                        return const Center(child: CircularProgressIndicator());
                      }
                      return ElevatedButton(
                        onPressed: () {
                          if (_formKey.currentState?.validate() ?? false) {
                            context.read<AuthBloc>().add(
                              AuthEvent.loginRequested(
                                _emailController.text,
                                _passwordController.text,
                              ),
                            );
                          }
                        },
                        child: const Padding(
                          padding: EdgeInsets.symmetric(vertical: 12),
                          child: Text('Войти', style: TextStyle(fontSize: 16)),
                        ),
                      );
                    },
                  ),
                  const SizedBox(height: 16),
                  TextButton(
                    onPressed: () {
                      // Navigate to register page
                    },
                    child: const Text('Нет аккаунта? Зарегистрироваться'),
                  ),
                ],
              ),
            ),
          ),
        ),
      ),
    );
  }
}