import ‘dart:io’;

void main() {

const int min = 15; const int max = 30;

bool light = false; int temp = 20; bool security = false;

String? choice;

while (choice != “5”) {

    print("\n1- Lights");
    print("2- Thermostat");
    print("3- Security");
    print("4- Status");
    print("5- Exit");

    stdout.write("Enter number: ");
    choice = stdin.readLineSync();

    if (choice == "1") {

      stdout.write("Type on or off: ");
      String? answer = stdin.readLineSync();

      if (answer == "on") {
        light = true;
      } else if (answer == "off") {
        light = false;
      } else {
        print("Wrong input");
      }
    }

    else if (choice == "2") {

      stdout.write("Enter temperature: ");
      int? newTemp = int.tryParse(stdin.readLineSync() ?? "");

      if (newTemp != null) {
        if (newTemp >= min && newTemp <= max) {
          temp = newTemp;
        } else {
          print("Temperature must be between 15 and 30");
        }
      }
    }

    else if (choice == "3") {

      stdout.write("Type arm or disarm: ");
      String? sec = stdin.readLineSync();

      if (sec == "arm") {
        security = true;
      } else if (sec == "disarm") {
        security = false;
      }
    }

    else if (choice == "4") {

      print("Light: ${light ? "ON" : "OFF"}");
      print("Temperature: $temp");
      print("Security: ${security ? "ARMED" : "DISARMED"}");

      if (temp % 3 == 0 && temp % 5 == 0) {
        print("Perfect Day");
      }
      else if (temp % 3 == 0) {
        print("Cool Day");
      }
      else if (temp % 5 == 0) {
        print("Warm Day");
      }
    }

}

print(“Program ended”); }