#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

const int irProximity1 = 2; // Sensor Infrared Proximity 1
const int irProximity2 = 3; // Sensor Infrared Proximity 2
const int buzzerPin = 4;    // Active Buzzer

int halanganCount1 = 0;
bool countdownActive = false;
unsigned long countdownStartTime = 0;
const unsigned long countdownDuration = 10000; // 10 seconds

void setup() {
  lcd.init();
  lcd.backlight();
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Selamat Datang");
  delay(2000);
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Masukkan 3 Coin");
}

void loop() {
  if (halanganCount1 < 3) {
    if (digitalRead(irProximity1) == LOW) {
      halanganCount1++;
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Masukkan Coin");
      if (halanganCount1 == 1) {
        countdownActive = true;
        countdownStartTime = millis();
        lcd.setCursor(0, 1);
        lcd.print("Countdown: 10s");
      }
      if (halanganCount1 == 3) {
        countdownActive = false;
        lcd.clear();
        lcd.setCursor(0, 0);
        lcd.print("Silahkan Pilih");
      }
    }
  } else {
    countdownActive = false;
  }

  if (countdownActive) {
    unsigned long currentTime = millis();
    unsigned long elapsedTime = currentTime - countdownStartTime;
    if (elapsedTime >= countdownDuration) {
      countdownActive = false;
      lcd.clear();
      lcd.setCursor(4, 0);
      lcd.print("Maaf...");
      lcd.setCursor(2, 1);
      lcd.print("Waktu Habis");
      delay(2000);
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Masukkan 3 Coin");
      halanganCount1 = 0;
    } else {
      int remainingTime = (countdownDuration - elapsedTime) / 1000;
      lcd.setCursor(0, 1);
      lcd.print("Waktu: " + String(remainingTime) + " detik  ");
    }
  }
}