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

LiquidCrystal_I2C lcd(0x27, 16, 2);

const byte ROWS = 4; // Jumlah baris keypad
const byte COLS = 4; // Jumlah kolom keypad
char keys[ROWS][COLS] = {
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'*', '0', '#', 'D'}
};
byte rowPins[ROWS] = {5, 4, 3, 2}; // Ke pin baris keypad
byte colPins[COLS] = {13, 12, 11, 10}; // Ke pin kolom keypad
Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );

unsigned long countdownStartTime = 0;
const unsigned long countdownDuration = 10000; // 10 seconds
bool countdownActive = true;

void setup() {
  lcd.init();
  lcd.backlight();
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Pilih 1-2");

  countdownStartTime = millis();
}

void loop() {
  if (countdownActive) {
    unsigned long currentTime = millis();
    unsigned long elapsedTime = currentTime - countdownStartTime;

    if (elapsedTime >= countdownDuration) {
      countdownActive = false;
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Waktu Habis");
    } else {
      int remainingTime = (countdownDuration - elapsedTime) / 1000;
      lcd.setCursor(0, 1);
      lcd.print("Waktu: " + String(remainingTime) + " detik");

      char key = keypad.getKey();

      if (key == '1') {
        lcd.clear();
        lcd.setCursor(0, 0);
        lcd.print("Selamat Datang");
        countdownActive = false;
      } else if (key == '2') {
        lcd.clear();
        lcd.setCursor(0, 0);
        lcd.print("Wellcome");
        countdownActive = false;
      }
    }
  }
}