#include <Arduino.h>

#define BUZZER_PIN   14 // GPIO pin for Buzzer
#define GREEN_LED    26 // GPIO pin for Green LED
#define RED_LED      25 // GPIO pin for Red LED
#define RELAY_PIN    27 // GPIO pin for Relay

void setup() {
  Serial.begin(115200); // Initialize serial communications
  
  pinMode(BUZZER_PIN, OUTPUT);
  pinMode(GREEN_LED, OUTPUT);
  pinMode(RED_LED, OUTPUT);
  pinMode(RELAY_PIN, OUTPUT);

  // Initial state: turn off buzzer, LEDs, and relay
  digitalWrite(BUZZER_PIN, LOW);
  digitalWrite(GREEN_LED, LOW);
  digitalWrite(RED_LED, LOW);
  digitalWrite(RELAY_PIN, LOW);

  Serial.println("Enter e-KTP ID (format: XX XX XX XX):");
}

void loop() {
  if (Serial.available()) {
    String input = Serial.readStringUntil('\n');
    input.trim(); // Remove any leading or trailing whitespace

    if (isValidFormat(input)) {
      // Check if the entered ID matches the expected ID
      if (input.equals("12 34 56 78")) { // Replace with your registered e-KTP ID
        accessGranted();
      } else {
        accessDenied();
      }
    } else {
      Serial.println("Invalid format. Enter e-KTP ID (format: XX XX XX XX):");
    }
  }
}

bool isValidFormat(String input) {
  // Check if the input matches the format "XX XX XX XX"
  if (input.length() == 11 && input.charAt(2) == ' ' && input.charAt(5) == ' ' && input.charAt(8) == ' ') {
    for (int i = 0; i < input.length(); i++) {
      if (i != 2 && i != 5 && i != 8) {
        if (!isDigit(input.charAt(i))) {
          return false;
        }
      }
    }
    return true;
  }
  return false;
}

void accessGranted() {
  Serial.println("Access granted!");
  digitalWrite(BUZZER_PIN, HIGH);
  digitalWrite(GREEN_LED, HIGH);
  digitalWrite(RELAY_PIN, HIGH);
  delay(5000); // Buzzer and LED on for 5 seconds
  digitalWrite(BUZZER_PIN, LOW);
  digitalWrite(GREEN_LED, LOW);
  digitalWrite(RELAY_PIN, LOW);
}

void accessDenied() {
  Serial.println("Access denied!");
  digitalWrite(BUZZER_PIN, HIGH);
  digitalWrite(RED_LED, HIGH);
  delay(5000); // Buzzer and LED on for 5 seconds
  digitalWrite(BUZZER_PIN, LOW);
  digitalWrite(RED_LED, LOW);
}