import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;
import 'login.dart';
import 'package:shared_preferences/shared_preferences.dart';

class RegisterPage extends StatefulWidget {
  RegisterPage({Key? key}) : super(key: key);

  @override
  State<StatefulWidget> createState() => _RegisterPageState();
}

class _RegisterPageState extends State<RegisterPage> {
  TextEditingController usernameController = TextEditingController();
  TextEditingController passwordController = TextEditingController();
  TextEditingController fullnameController = TextEditingController();
  bool _obscureText = true;

  String usernameError = '';
  String passwordError = '';

  Future<void> registerUser() async {
    String username = usernameController.text.trim();
    String password = passwordController.text.trim();
    String fullname = fullnameController.text.trim();

    // Validasi username
    if (username.length < 6 ||
        !RegExp(r'^(?=.*[A-Z])(?=.*[0-9])[A-Za-z0-9]+$').hasMatch(username)) {
      setState(() {
        usernameError =
            'Username harus minimal 6 karakter, mengandung huruf kapital dan angka.';
      });
      return;
    } else {
      setState(() {
        usernameError = '';
      });
    }

    // Validasi password
    if (password.length < 6 ||
        !RegExp(r'^(?=.*?[a-zA-Z])(?=.*?[0-9])(?=.*?[!@#$%^&*()_+{}|:"<>?~`]).{6,}$')
            .hasMatch(password)) {
      setState(() {
        passwordError =
            'Password harus minimal 6 karakter, mengandung angka dan simbol.';
      });
      return;
    } else {
      setState(() {
        passwordError = '';
      });
    }

    // Validasi fullname (opsional)

    final prefs = await SharedPreferences.getInstance();
    String mqttServerIp = prefs.getString('mqtt_server_ip') ?? '192.168.0.1';
    String url = 'http://$mqttServerIp/test_api/register.php';

    final response = await http.post(
      Uri.parse(url),
      body: {
        "username": username,
        "password": password,
        "fullname": fullname,
      },
    );
    if (response.statusCode == 200) {
      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(
          content: Text('Akun berhasil dibuat'),
          duration: Duration(seconds: 2),
          backgroundColor: Colors.green,
        ),
      );
      Navigator.push(
        context,
        MaterialPageRoute(builder: (context) => const LoginPage()),
      );
    } else {
      setState(() {
        // Handle error
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Halaman Registrasi'),
      ),
      body: SingleChildScrollView(
        child: Center(
          child: Padding(
            padding: const EdgeInsets.all(15.0),
            child: Column(
              mainAxisAlignment: MainAxisAlignment.center,
              children: <Widget>[
                Padding(
                  padding: const EdgeInsets.all(10.0),
                  child:
                      Image.asset("images/nature.gif", height: 200, width: 200),
                ),
                const SizedBox(
                  height: 10,
                ),
                Card(
                  shape: RoundedRectangleBorder(
                    borderRadius: BorderRadius.circular(15.0),
                  ),
                  elevation: 8,
                  margin: const EdgeInsets.symmetric(horizontal: 16.0),
                  child: Padding(
                    padding: const EdgeInsets.all(20.0),
                    child: Column(
                      crossAxisAlignment: CrossAxisAlignment.start,
                      children: <Widget>[
                        const Center(
                          child: Text(
                            'Register',
                            style: TextStyle(
                              fontSize: 24.0,
                              fontFamily: 'Poppins',
                              fontWeight: FontWeight.bold,
                              color: Color.fromARGB(150, 0, 0, 0),
                            ),
                          ),
                        ),
                        const SizedBox(height: 10),
                        TextFormField(
                          controller: usernameController,
                          decoration: InputDecoration(
                            prefixIcon: const Icon(Icons.person),
                            labelText: 'Username',
                            border: const OutlineInputBorder(
                              borderRadius:
                                  BorderRadius.all(Radius.circular(12.0)),
                            ),
                            hintText: 'Username',
                            hintStyle: TextStyle(
                              color: const Color.fromARGB(92, 0, 0, 0)
                                  .withOpacity(0.25),
                              fontSize: 14.0,
                            ),
                          ),
                        ),
                        if (usernameError.isNotEmpty)
                          Padding(
                            padding:
                                const EdgeInsets.only(top: 8.0, left: 12.0),
                            child: Text(
                              usernameError,
                              style: const TextStyle(
                                color: Colors.red,
                                fontSize: 12.0,
                              ),
                            ),
                          ),
                        const SizedBox(height: 10),
                        TextFormField(
                          controller: fullnameController,
                          decoration: InputDecoration(
                            prefixIcon: const Icon(Icons.perm_identity),
                            labelText: 'Fullname',
                            border: const OutlineInputBorder(
                              borderRadius:
                                  BorderRadius.all(Radius.circular(12.0)),
                            ),
                            hintText: 'Fullname',
                            hintStyle: TextStyle(
                              color: Colors.black.withOpacity(0.25),
                              fontSize: 14.0,
                            ),
                          ),
                        ),
                        const SizedBox(height: 10),
                        TextFormField(
                          controller: passwordController,
                          obscureText: _obscureText,
                          decoration: InputDecoration(
                            prefixIcon: const Icon(Icons.password),
                            labelText: 'Password',
                            border: const OutlineInputBorder(
                              borderRadius:
                                  BorderRadius.all(Radius.circular(12.0)),
                            ),
                            hintText: 'Password',
                            hintStyle: TextStyle(
                              color: Colors.black.withOpacity(0.25),
                              fontSize: 14.0,
                            ),
                            suffixIcon: IconButton(
                              icon: Icon(
                                _obscureText
                                    ? Icons.visibility
                                    : Icons.visibility_off,
                              ),
                              onPressed: () {
                                setState(() {
                                  _obscureText = !_obscureText;
                                });
                              },
                            ),
                          ),
                        ),
                        if (passwordError.isNotEmpty)
                          Padding(
                            padding:
                                const EdgeInsets.only(top: 8.0, left: 12.0),
                            child: Text(
                              passwordError,
                              style: const TextStyle(
                                color: Colors.red,
                                fontSize: 12.0,
                              ),
                            ),
                          ),
                        const SizedBox(
                          height: 20,
                        ),
                        ElevatedButton(
                          onPressed: registerUser,
                          style: ElevatedButton.styleFrom(
                            shape: RoundedRectangleBorder(
                              borderRadius: BorderRadius.circular(12.0),
                            ),
                            padding: const EdgeInsets.symmetric(vertical: 16.0),
                            minimumSize: const Size(double.infinity, 50),
                          ),
                          child: const Text('Daftar'),
                        ),
                      ],
                    ),
                  ),
                ),
              ],
            ),
          ),
        ),
      ),
    );
  }
}