import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:go_router/go_router.dart';

import '../../core/services/auth_controller.dart';

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

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

class _LoginPageState extends ConsumerState<LoginPage> {
  final _formKey = GlobalKey<FormState>();
  final _emailController = TextEditingController();
  final _passwordController = TextEditingController();
  bool _obscurePassword = true;

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

  Future<void> _submit() async {
    if (!(_formKey.currentState?.validate() ?? false)) {
      return;
    }

    try {
      await ref
          .read(authControllerProvider.notifier)
          .login(
            email: _emailController.text.trim(),
            password: _passwordController.text,
          );
      if (!mounted) {
        return;
      }
      final authState = ref.read(authControllerProvider).asData?.value;
      if (authState?.userRole == 'admin') {
        context.go('/admin');
        return;
      }
      if (authState?.userRole == 'driver') {
        context.go('/driver');
        return;
      }
      final routeId = authState?.routeId;
      if (routeId != null && routeId.isNotEmpty) {
        context.go('/home?routeId=$routeId');
        return;
      }
      context.go('/home');
    } catch (error) {
      if (!mounted) {
        return;
      }
      ScaffoldMessenger.of(
        context,
      ).showSnackBar(SnackBar(content: Text(error.toString())));
    }
  }

  @override
  Widget build(BuildContext context) {
    final authState = ref.watch(authControllerProvider);
    final loading = authState.isLoading;

    return Scaffold(
      body: SafeArea(
        child: Center(
          child: SingleChildScrollView(
            padding: const EdgeInsets.all(24),
            child: ConstrainedBox(
              constraints: const BoxConstraints(maxWidth: 420),
              child: Form(
                key: _formKey,
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.stretch,
                  children: [
                    const SizedBox(height: 12),
                    const Icon(Icons.delete_outline_rounded, size: 54),
                    const SizedBox(height: 16),
                    Text(
                      'Recolecta',
                      textAlign: TextAlign.center,
                      style: Theme.of(context).textTheme.headlineMedium
                          ?.copyWith(fontWeight: FontWeight.w700),
                    ),
                    const SizedBox(height: 8),
                    Text(
                      'Accede para ver solo tu ruta asignada.',
                      textAlign: TextAlign.center,
                      style: Theme.of(context).textTheme.bodyMedium,
                    ),
                    const SizedBox(height: 28),
                    TextFormField(
                      controller: _emailController,
                      keyboardType: TextInputType.emailAddress,
                      decoration: const InputDecoration(
                        labelText: 'Correo electrónico',
                        hintText: 'tu@correo.com',
                      ),
                      validator: (value) =>
                          (value == null || value.trim().isEmpty)
                          ? 'Ingresa tu correo'
                          : null,
                    ),
                    const SizedBox(height: 16),
                    TextFormField(
                      controller: _passwordController,
                      obscureText: _obscurePassword,
                      decoration: InputDecoration(
                        labelText: 'Contraseña',
                        hintText: '••••••••',
                        suffixIcon: IconButton(
                          onPressed: () => setState(
                            () => _obscurePassword = !_obscurePassword,
                          ),
                          icon: Icon(
                            _obscurePassword
                                ? Icons.visibility_outlined
                                : Icons.visibility_off_outlined,
                          ),
                        ),
                      ),
                      validator: (value) => (value == null || value.length < 6)
                          ? 'La contraseña debe tener al menos 6 caracteres'
                          : null,
                    ),
                    const SizedBox(height: 24),
                    SizedBox(
                      height: 52,
                      child: FilledButton(
                        onPressed: loading ? null : _submit,
                        child: loading
                            ? const SizedBox(
                                width: 20,
                                height: 20,
                                child: CircularProgressIndicator(
                                  strokeWidth: 2,
                                ),
                              )
                            : const Text('Entrar'),
                      ),
                    ),
                    const SizedBox(height: 16),
                    TextButton(
                      onPressed: () => context.go('/register'),
                      child: const Text('Crear cuenta'),
                    ),
                  ],
                ),
              ),
            ),
          ),
        ),
      ),
    );
  }
}