// Define the LED pin
const int ledPin = 13;

// Define the button pin (connected to external interrupt)
const int buttonPin = 2;

// Variable to store the LED state
volatile bool ledState = false;

void setup() {
  // Configure the LED pin as output
  pinMode(ledPin, OUTPUT);

  // Configure the button pin as input with a pull-up resistor
  pinMode(buttonPin, INPUT_PULLUP);

  // Attach an interrupt to the button pin
  // Trigger the interrupt on a falling edge (button press)
  attachInterrupt(digitalPinToInterrupt(buttonPin), toggleLED, FALLING);

  // Initialize the LED to OFF
  digitalWrite(ledPin, LOW);

  // Optional: Debug message
  Serial.begin(9600);
  Serial.println("Smart Home Light Control System Initialized");
}

void loop() {
  // Main loop does nothing, as the logic is handled by the interrupt
}

// Interrupt Service Routine (ISR) to toggle the LED state
void toggleLED() {
  // Debounce delay
  delay(50);

  // Toggle the LED state
  ledState = !ledState;

  // Apply the new state to the LED
  digitalWrite(ledPin, ledState ? HIGH : LOW);

  // Optional: Debug message
  Serial.print("LED is now: ");
  Serial.println(ledState ? "ON" : "OFF");
}