import 'dart:io';

void main() {
  bool lightsOn = false;
  int temperature = 20;
  bool securityArmed = false;
  const int minTemp = 15;
  const int maxTemp = 30;
  print("welcom to the smart home !");
  while (true) {
    print("please choose action");
    print('1. Toggle lights');
    print('2. Set thermostat temperature');
    print('3. Arm/disarm security system');
    print('4. View system status');
    print('5. Exit');
    stdout.write('Enter your choice: ');
    String? choice = stdin.readLineSync();

    //  تنفيذ الخيار
    switch (choice) {
      case '1':
        // تشغيل/إطفاء الأضواء
        lightsOn = !lightsOn;
        print('Lights are now ${lightsOn ? 'ON' : 'OFF'}.');
        break;

      case '2':
        // ضبط درجة الحرارة
        stdout.write('Enter temperature ($minTemp - $maxTemp): ');
        int? newTemp = int.tryParse(stdin.readLineSync() ?? '');
        if (newTemp != null && newTemp >= minTemp && newTemp <= maxTemp) {
          temperature = newTemp;
          print('Temperature set to $temperature°C');
        } else {
          print(
            'Invalid temperature! Please enter a value between $minTemp and $maxTemp.',
          );
        }
        break;

      case '3':
        // تفعيل/إلغاء نظام الأمان
        securityArmed = !securityArmed;
        print(
          'Security system is now ${securityArmed ? 'ARMED' : 'DISARMED'}.',
        );
        break;

      case '4':
        // عرض حالة النظام
        print('\n--- System Status ---');
        print('Lights: ${lightsOn ? 'ON' : 'OFF'}');
        print('Temperature: $temperature°C');
        print('Security: ${securityArmed ? 'ARMED' : 'DISARMED'}');
        break;

      case '5':
        // الخروج من البرنامج
        print('Exiting... Goodbye!');
        return;

      // إنهاء البرنامج

      default:
        // أي إدخال خاطئ
        print('Invalid choice, please try again.');
    }
  }
}