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

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

  @override
  ConsumerState<ResetPasswordScreen> createState() =>
      _ResetPasswordScreenState();
}

class _ResetPasswordScreenState extends ConsumerState<ResetPasswordScreen> {
  final _formKey = GlobalKey<FormState>();
  final _tokenController = TextEditingController();
  final _passwordController = TextEditingController();
  final _confirmController = TextEditingController();
  bool _success = false;

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

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

    return Scaffold(
      appBar: AppBar(title: const Text('Новый пароль')),
      body: Padding(
        padding: const EdgeInsets.all(24),
        child: Form(
          key: _formKey,
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              const SizedBox(height: 48),
              const Icon(
                Icons.lock_reset,
                size: 64,
                color: VoIdeaColors.primary,
              ),
              const SizedBox(height: 24),
              if (!_success) ...[
                Text(
                  'Введите код из письма и новый пароль',
                  textAlign: TextAlign.center,
                  style: Theme.of(context).textTheme.bodyLarge,
                ),
                const SizedBox(height: 32),
                TextFormField(
                  controller: _tokenController,
                  decoration: const InputDecoration(
                    labelText: 'Код из письма',
                    prefixIcon: Icon(Icons.vpn_key_outlined),
                  ),
                  validator: (v) => Validators.required(v, 'Код'),
                ),
                const SizedBox(height: 16),
                TextFormField(
                  controller: _passwordController,
                  obscureText: true,
                  decoration: const InputDecoration(
                    labelText: 'Новый пароль',
                    prefixIcon: Icon(Icons.lock_outlined),
                  ),
                  validator: Validators.password,
                ),
                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),
                ),
                const SizedBox(height: 24),
                if (authState.error != null)
                  Padding(
                    padding: const EdgeInsets.only(bottom: 16),
                    child: Text(
                      authState.error!,
                      style: const TextStyle(color: VoIdeaColors.error),
                      textAlign: TextAlign.center,
                    ),
                  ),
                ElevatedButton(
                  onPressed: authState.status == AuthStatus.loading
                      ? null
                      : () {
                          if (_formKey.currentState!.validate()) {
                            authNotifier
                                .resetPassword(
                              _tokenController.text.trim(),
                              _passwordController.text,
                            )
                                .then((_) => setState(() => _success = true));
                          }
                        },
                  child: const Text('Сохранить'),
                ),
              ] else ...[
                const Icon(
                  Icons.check_circle,
                  size: 64,
                  color: VoIdeaColors.success,
                ),
                const SizedBox(height: 16),
                Text(
                  'Пароль изменён',
                  textAlign: TextAlign.center,
                  style: Theme.of(context).textTheme.titleLarge,
                ),
                const SizedBox(height: 24),
                ElevatedButton(
                  onPressed: () => context.go('/auth/login'),
                  child: const Text('Войти'),
                ),
              ],
            ],
          ),
        ),
      ),
    );
  }
}