Maria ahmed Alnasi_251001282_que

import 'dart:io';

void main() {
  // 🔹 الثوابت
  const int minTemp = 15;
  const int maxTemp = 30;

  // 🔹 المتغيرات المبدئية
  bool lightsOn = false;
  int temperature = 20;
  bool securityArmed = false;

  while (true) {
    print("\n===== Smart Home Menu =====");
    print("1. Turn Lights ON/OFF");
    print("2. Set Thermostat Temperature");
    print("3. Arm/Disarm Security System");
    print("4. View System Status");
    print("5. Exit");
    stdout.write("Enter your choice: ");
    var choice = stdin.readLineSync();

    if (choice == '5') {
      print("Exiting system... Goodbye!");
      break;
    }

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

      case '2':
        stdout.write("Enter temperature ($minTemp - $maxTemp): ");
        var input = stdin.readLineSync();
        var temp = int.tryParse(input ?? '');

        if (temp != null && temp >= minTemp && temp <= maxTemp) {
          temperature = temp;
          print("Temperature set to $temperature°C");
        } else {
          print("Invalid temperature! Please enter between $minTemp and $maxTemp.");
        }
        break;

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

      case '4':
        print("\n===== System Status =====");
        String lightsStatus = lightsOn ? "ON" : "OFF";
        String securityStatus = securityArmed ? "ARMED" : "DISARMED";
        print("Lights: $lightsStatus");
        print("Thermostat: $temperature°C");
        print("Security System: $securityStatus");

        // FizzBuzz-like condition
        if (temperature % 3 == 0 && temperature % 5 == 0) {
          print("Perfect Day 🌤️");
        } else if (temperature % 3 == 0) {
          print("Cool Day ❄️");
        } else if (temperature % 5 == 0) {
          print("Warm Day ☀️");
        }
        break;

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