import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:go_router/go_router.dart';
import 'package:flutter_animate/flutter_animate.dart';
import '../../../providers/auth_provider.dart';
import '../../../core/utils/validators.dart';

class RegisterScreen extends ConsumerStatefulWidget {
  const RegisterScreen({super.key});

  @override
  ConsumerState<RegisterScreen> createState() => _RegisterScreenState();
}

class _RegisterScreenState extends ConsumerState<RegisterScreen> {
  final _formKey = GlobalKey<FormState>();
  final _nameController = TextEditingController();
  final _emailController = TextEditingController();
  final _passwordController = TextEditingController();
  final _confirmController = TextEditingController();
  bool _obscurePassword = true;

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

  @override
  Widget build(BuildContext context) {
    final authState = ref.watch(authProvider);
    final authNotifier = ref.read(authProvider.notifier);

    ref.listen(authProvider, (_, state) {
      if (state.status == AuthStatus.authenticated) {
        context.go('/');
      }
    });

    return Scaffold(
      appBar: AppBar(title: const Text('Регистрация')),
      body: SafeArea(
        child: SingleChildScrollView(
          padding: const EdgeInsets.all(24),
          child: Form(
            key: _formKey,
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.stretch,
              children: [
                const SizedBox(height: 24),
                TextFormField(
                  controller: _nameController,
                  decoration: const InputDecoration(
                    labelText: 'Имя',
                    prefixIcon: Icon(Icons.person_outline),
                  ),
                  validator: (v) => Validators.required(v, 'Имя'),
                ).animate().fadeIn().slideX(),
                const SizedBox(height: 16),
                TextFormField(
                  controller: _emailController,
                  keyboardType: TextInputType.emailAddress,
                  decoration: const InputDecoration(
                    labelText: 'Email',
                    prefixIcon: Icon(Icons.email_outlined),
                  ),
                  validator: Validators.email,
                ).animate().fadeIn(delay: 100.ms).slideX(),
                const SizedBox(height: 16),
                TextFormField(
                  controller: _passwordController,
                  obscureText: _obscurePassword,
                  decoration: InputDecoration(
                    labelText: 'Пароль',
                    prefixIcon: const Icon(Icons.lock_outlined),
                    suffixIcon: IconButton(
                      icon: Icon(_obscurePassword
                          ? Icons.visibility_off
                          : Icons.visibility),
                      onPressed: () =>
                          setState(() => _obscurePassword = !_obscurePassword),
                    ),
                  ),
                  validator: Validators.password,
                ).animate().fadeIn(delay: 200.ms).slideX(),
                const SizedBox(height: 16),
                TextFormField(
                  controller: _confirmController,
                  obscureText: true,
                  decoration: const InputDecoration(
                    labelText: 'Подтвердите пароль',
                    prefixIcon: Icon(Icons.lock_outlined),
                  ),
                  validator: (v) =>
                      Validators.confirmPassword(v, _passwordController.text),
                ).animate().fadeIn(delay: 300.ms).slideX(),
                const SizedBox(height: 32),
                if (authState.error != null)
                  Padding(
                    padding: const EdgeInsets.only(bottom: 16),
                    child: Text(
                      authState.error!,
                      style: const TextStyle(color: Color(0xFFEF4444)),
                      textAlign: TextAlign.center,
                    ),
                  ),
                ElevatedButton(
                  onPressed: authState.status == AuthStatus.loading
                      ? null
                      : () {
                          if (_formKey.currentState!.validate()) {
                            authNotifier.register(
                              _emailController.text.trim(),
                              _passwordController.text,
                              _nameController.text.trim(),
                            );
                          }
                        },
                  child: authState.status == AuthStatus.loading
                      ? const SizedBox(
                          height: 20,
                          width: 20,
                          child: CircularProgressIndicator(
                            strokeWidth: 2,
                            color: Colors.white,
                          ),
                        )
                      : const Text('Зарегистрироваться'),
                ).animate().fadeIn(delay: 400.ms),
                const SizedBox(height: 16),
                TextButton(
                  onPressed: () => context.pop(),
                  child: const Text('Уже есть аккаунт? Войти'),
                ),
              ],
            ),
          ),
        ),
      ),
    );
  }
}