#include <LiquidCrystal.h>

// Initialize the LCD with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

// Define the pin numbers
const int ledPin = 13;
const int buttonPin = 7;

// Variables to store attempts and unauthorized access status
int attempts = 0;
String correctCode = "2347248"; 
String name = "Rajendran M S";  
bool unauthorizedAccess = false;

void setup() {
  // Set the pin modes
  pinMode(ledPin, OUTPUT);
  pinMode(buttonPin, INPUT_PULLUP);

  // Initialize the LCD and print the initial pattern
  lcd.begin(16, 2);
  displayPattern(); 
}

void loop() {
  // Check if the button is pressed
  if (digitalRead(buttonPin) == LOW) { // Button is pressed when the state is LOW
    delay(50); // Debounce delay
    if (digitalRead(buttonPin) == HIGH) { // Confirm the button is still pressed
      attempts++;
      while(digitalRead(buttonPin) == LOW); // Wait until the button is released
    }
  }
  Serial.println(attempts);
  // Check if the maximum number of attempts is reached
  if (attempts >= 3 && !unauthorizedAccess) {
    unauthorizedAccess = true;
    blinkLED();
  }
}

void displayPattern() {
  lcd.setCursor(0, 0);
  lcd.print("R.M.S. 7248");

  lcd.setCursor(0, 1);
  lcd.print(createUniqueSequence(name, correctCode));
}

String createUniqueSequence(String name, String code) {
  String sequence = "";
  int minLength = min(name.length(), code.length());
  for (int i = 0; i < minLength; i++) {
    sequence += String((int)name[i], HEX) + " ";
    sequence += String(code[i]) + " ";
  }
  return sequence;
}

void blinkLED() {
  for(int i = 0; i < 10; i++) { // Blink LED 10 times to indicate unauthorized access
    digitalWrite(ledPin, HIGH);
    delay(500);
    digitalWrite(ledPin, LOW);
    delay(500);
  }
}