#define BUTTON_PIN 18    // Pushbutton simulating fingerprint sensor
#define GREEN_LED 4      // Attendance confirmed
#define RED_LED 5        // Waiting for attendance
#define RELAY_IN 21      // Relay IN pin (controls relay)

bool attendanceTaken = false;

void setup() {
  pinMode(BUTTON_PIN, INPUT_PULLUP); // Button between GPIO18 and GND
  pinMode(GREEN_LED, OUTPUT);
  pinMode(RED_LED, OUTPUT);
  pinMode(RELAY_IN, OUTPUT);

  digitalWrite(RED_LED, HIGH);      // Initial state: waiting
  digitalWrite(GREEN_LED, LOW);
  digitalWrite(RELAY_IN, LOW);      // Relay OFF

  Serial.begin(115200);
  Serial.println("Attendance System Ready");
}

void loop() {
  if (digitalRead(BUTTON_PIN) == LOW && !attendanceTaken) {
    // Simulate attendance confirmation
    Serial.println("Attendance confirmed!");
    digitalWrite(RED_LED, LOW);
    digitalWrite(GREEN_LED, HIGH);
    digitalWrite(RELAY_IN, HIGH);   // Turn relay ON (game power ON)
    attendanceTaken = true;

    delay(30000); // Game active for 30 seconds

    // Reset system
    digitalWrite(RELAY_IN, LOW);    // Turn relay OFF (game power OFF)
    digitalWrite(GREEN_LED, LOW);
    digitalWrite(RED_LED, HIGH);
    attendanceTaken = false;
  }
}