import 'dart:io';

void main() {
  String light = "OFF";
  int thermostat = 20;
  String securitySystem = "disarmed";
  print("Weicome to the Ssmart System!");
  print("Please choose an action:");
  print("1. Toggle Lights");
  print("2. Set thermostat temperature");
  print("3. Arm/disarm security system\n4. View system state \n5. Exit");

  while (true) {
    stdout.write("Enter your choice:");
    int choice = int.parse(stdin.readLineSync()!);
    if (choice == 1) {
      switch (light) {
        case "ON":
          light = "OFF";
        case "OFF":
          light = "ON";
      }
      light = "ON";
      print("Lights are now $light.");
    } else if (choice == 2) {
      const max = 30;
      const min = 15;
      print("Set thermostate temperature (15C - 30C):");
      thermostat = int.parse(stdin.readLineSync()!);
      if (thermostat < max && thermostat > min) {
        print("Thermostate set to $thermostat C.");
      } else {
        print("Wrong temp");
        print("Set thermostate temperature (15C - 30C):");
        thermostat = int.parse(stdin.readLineSync()!);
      }
    } else if (choice == 3) {
      switch (securitySystem) {
        case "disarmed":
          securitySystem = "arm";
          break;
        case "arm":
          securitySystem = "disarmed";
          break;
      }
      print("Secutiry Status: $securitySystem");
    } else if (choice == 4) {
      print("System Status:");
      print("Light: $light");
      String temp = "";
      if (thermostat % 3 == 0 && thermostat % 5 == 0) {
        temp = "Perfect Day";
      } else if (thermostat % 3 == 0) {
        temp = "Cool Day";
      } else if (thermostat % 5 == 0) {
        temp = "Warm Day";
      }
      print("Thermostat: $thermostat C - $temp");
      String status = securitySystem.toUpperCase();
      print("Security System: $status");
    } else if (choice == 5) {
      print("Existing the system. Goodbye!");
      break;
    } else {
      print('Invalid choice. Enter a number between 1 and 4.');
    }
  }
}