import 'package:flutter/material.dart';
import '../services/api_service.dart';
import 'dashboard_page.dart';
import '../entities/auth_token.dart';

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

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

class _LoginPageState extends State<LoginPage> {
  final _emailController = TextEditingController();
  final _passwordController = TextEditingController();
  bool _loading = false;
  String? _error;

  void _login() async {
    setState(() {
      _loading = true;
      _error = null;
    });

    final email = _emailController.text.trim();
    final password = _passwordController.text;

    try {
      final token = await ApiService.login(email, password);
      auth_token().token = token;
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text('Login riuscito! Token: $token')),
      );
      if (!mounted) return;
      Navigator.of(context).pushReplacement(
        MaterialPageRoute(builder: (_) => const DashboardPage()),
      );
    } catch (e) {
      setState(() {
        _error = e.toString();
      });
    } finally {
      setState(() {
        _loading = false;
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('Login')),
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Column(
          children: [
            TextField(
              controller: _emailController,
              decoration: const InputDecoration(labelText: 'Email'),
            ),
            const SizedBox(height: 12),
            TextField(
              controller: _passwordController,
              obscureText: true,
              decoration: const InputDecoration(labelText: 'Password'),
            ),
            const SizedBox(height: 24),
            if (_error != null)
              Text(
                _error!,
                style: const TextStyle(color: Colors.red),
              ),
            _loading
                ? const CircularProgressIndicator()
                : ElevatedButton(
                    onPressed: _login,
                    child: const Text('Login'),
                  ),
          ],
        ),
      ),
    );
  }
}