const int buttonPin1 = 2;
const int buttonPin2 = 3;
const int buttonPin3 = 4;

const int ledPin1 = 13;
const int ledPin2 = 11;
const int ledPin3 = 12;

bool ledState1 = false;
bool ledState2 = false;
bool ledState3 = false;

String userInput = ""; 
void setup() {
  Serial.begin(115200);

  pinMode(buttonPin1, INPUT_PULLUP);
  pinMode(buttonPin2, INPUT_PULLUP);
  pinMode(buttonPin3, INPUT_PULLUP);

  pinMode(ledPin1, OUTPUT);
  pinMode(ledPin2, OUTPUT);
  pinMode(ledPin3, OUTPUT);
}

void loop() {
  
  if (Serial.available() > 0) {
    userInput = Serial.readStringUntil('\n');  

    if (userInput == "button1") {
      toggleLED(1);
    }
  
    else if (userInput == "button2") {
      toggleLED(2);
    }
    
    else if (userInput == "button3") {
      toggleLED(3);
    }
  }

 
  if (digitalRead(buttonPin1) == LOW) {
    toggleLED(1);
    delay(250);
  }
  if (digitalRead(buttonPin2) == LOW) {
    toggleLED(2);
    delay(250);
  }
  if (digitalRead(buttonPin3) == LOW) {
    toggleLED(3);
    delay(250);
  }
}


void toggleLED(int buttonNumber) {
  if (buttonNumber == 1) {
    if (!ledState1) {
      ledState1 = true;
      digitalWrite(ledPin1, HIGH);
      Serial.println("LED 1 turned ON");
    } else {
      ledState1 = false;
      digitalWrite(ledPin1, LOW);
      Serial.println("LED 1 turned OFF");
    }
  }

  if (buttonNumber == 2) {
    if (!ledState2) {
      ledState2 = true;
      digitalWrite(ledPin2, HIGH);
      Serial.println("LED 2 turned ON");
    } else {
      ledState2 = false;
      digitalWrite(ledPin2, LOW);
      Serial.println("LED 2 turned OFF");
    }
  }

  if (buttonNumber == 3) {
    if (!ledState3) {
      ledState3 = true;
      digitalWrite(ledPin3, HIGH);
      Serial.println("LED 3 turned ON");
    } else {
      ledState3 = false;
      digitalWrite(ledPin3, LOW);
      Serial.println("LED 3 turned OFF");
    }
  }
  
  delay(250); 
}