import 'dart:io';

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

  // حدود منظم الحرارة
  const int minTemp = 15;
  const int maxTemp = 30;

  while (true) {
    // عرض القائمة للمستخدم
    print("\nWelcome to the Smart Home System!");
    print("Please choose an 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();

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

      case '2':
        stdout.write("Set thermostat temperature ($minTemp°C – $maxTemp°C): ");
        int? temp = int.tryParse(stdin.readLineSync() ?? '');

        if (temp != null && temp >= minTemp && temp <= maxTemp) {
          thermostat = temp;
          print("Thermostat set to ${thermostat}°C - ${getTemperatureStatus(thermostat)}");
        } 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("\nSystem Status:");
        print("- Lights: ${lightsOn ? 'ON' : 'OFF'}");
        print("- Thermostat: ${thermostat}°C - ${getTemperatureStatus(thermostat)}");
        print("- Security System: ${securityArmed ? 'ARMED' : 'DISARMED'}");
        break;

      case '5':
        print("Exiting the system. Goodbye!");
        return;

      default:
        print("Invalid choice. Please try again.");
    }
  }
}

// دالة لمعرفة حالة درجة الحرارة بناءً على تمرين FizzBuzz-like
String getTemperatureStatus(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";
  }
  return "Normal Day";
}