import 'dart:io';

// ثوابت للحرارة
const int minTemp = 15;
const int maxTemp = 30;

void main() {
  // الحالة الافتراضية للأجهزة
  bool lightsOn = false;
  int thermostat = 20;
  bool securityArmed = false;

  while (true) {
    // عرض الخيارات للمستخدم
    print('\n=== Smart Home Control ===');
    print('1. Toggle Lights');
    print('2. Set Thermostat');
    print('3. Arm/Disarm Security System');
    print('4. View System Status');
    print('5. Exit');
    stdout.write('Enter your choice: ');
    String? choice = stdin.readLineSync();

    if (choice == '5') {
      print('See you next time! Have a great day.');
      break;
    }

    switch (choice) {
      case '1':
        lightsOn = !lightsOn;
        print('Lights are now ${lightsOn ? "ON" : "OFF"}');
        break;

      case '2':
        stdout.write('Enter temperature ($minTemp-$maxTemp°C): ');
        String? tempInput = stdin.readLineSync();
        int? temp = int.tryParse(tempInput ?? '');
        if (temp != null && temp >= minTemp && temp <= maxTemp) {
          thermostat = temp;
          print('Thermostat set to $thermostat°C');
        } else {
          print('Invalid temperature! Please enter a value between $minTemp and $maxTemp.');
        }
        break;

      case '3':
        securityArmed = !securityArmed;
        print('Security System is now ${securityArmed ? "ARMED" : "DISARMED"}');
        break;

      case '4':
        print('\n--- System Status ---');
        print('Lights: ${lightsOn ? "ON" : "OFF"}');
        print('Thermostat: $thermostat°C ${temperatureMessage(thermostat)}');
        print('Security System: ${securityArmed ? "ARMED" : "DISARMED"}');
        break;

      default:
        print('Invalid choice! Please select a valid option.');
    }
  }
}

// دالة لإظهار رسالة FizzBuzz-like حسب الحرارة
String temperatureMessage(int temp) {
  if (temp % 3 == 0 && temp % 5 == 0) {
    return '- Perfect Day';
  } else if (temp % 3 == 0) {
    return '- Cool Day';
  } else if (temp % 5 == 0) {
    return '- Warm Day';
  } else {
    return '';
  }
}