/* __scenario(1)__
   1-Light: Can be on or off

   2-Thermostat: Adjustable between 15°C and 30°C

   3-Security System: Can be armed or disarmed */

   import 'dart:io';

// Define constants for temperature range
const int minTemp = 15;
const int maxTemp = 30;

// Light class
class Light {
  bool isOn = false;

  void toggle() {
    isOn = !isOn;
    print(isOn ? "Lights are ON." : "Lights are OFF.");
  }
}

// Thermostat class
class Thermostat {
  double temperature = 20.0;

  void setTemperature(double temp) {
    if (temp < minTemp || temp > maxTemp) {
      print("Invalid temperature. Please enter a value between $minTemp and $maxTemp.");
    } else {
      temperature = temp;
      print("Thermostat set to $temperature°C.");
    }
  }
}

// Security System class
class SecuritySystem {
  bool isArmed = false;

  void toggleSecurity() {
    isArmed = !isArmed;
    print(isArmed ? "Security System is ARMED." : "Security System is DISARMED.");
  }
}

// Main function with a command-line interface (CLI)
void main() {
  // Initialize the devices
  Light light = Light();
  Thermostat thermostat = Thermostat();
  SecuritySystem securitySystem = SecuritySystem();

  // User interactaion
  while (true) {
    print("\nSmart Home System:");
    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: ");
    String? choice = stdin.readLineSync();

    if (choice == '1') {
      light.toggle();
    } else if (choice == '2') {
      stdout.write("Enter temperature between $minTemp°C and $maxTemp°C: ");
      String? tempInput = stdin.readLineSync();
      if (tempInput != null && double.tryParse(tempInput) != null) {
        double temp = double.parse(tempInput);
        thermostat.setTemperature(temp);
      } else {
        print("Invalid input. Please enter a valid number.");
      }
    } else if (choice == '3') {
      securitySystem.toggleSecurity();
    } else if (choice == '4') {
      displayStatus(light, thermostat, securitySystem);
    } else if (choice == '5') {
      print("Exiting Smart Home System");
      break;
    } else {
      print("Invalid choice, please try again.");
    }
  }
}

// Display system status with additional logic for temperature
void displayStatus(Light light, Thermostat thermostat, SecuritySystem securitySystem) {
  String lightStatus = light.isOn ? "ON" : "OFF";
  String securityStatus = securitySystem.isArmed ? "ARMED" : "DISARMED";
  String tempMessage = "Temperature: ${thermostat.temperature}°C";

  // setting temperature comments based on degree
  if (thermostat.temperature % 3 == 0 && thermostat.temperature % 5 == 0) {
    tempMessage += " - Perfect Day:)";
  } else if (thermostat.temperature % 3 == 0) {
    tempMessage += " - Cool Day:)";
  } else if (thermostat.temperature % 5 == 0) {
    tempMessage += " - Warm Day:)";
  }

  print("\nSystem Status:");
  print("Lights: $lightStatus");
  print(tempMessage);
  print("Security: $securityStatus");
}