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

Servo servo1;
Servo servo2;

LiquidCrystal_I2C lcd(0x27, 16, 2); // Alamat LCD I2C dan ukuran (sesuaikan)
const int buzzerPin = 9; // Pin untuk buzzer

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 );

const int IRProximity1 = 6; // Pin untuk Sensor IR Proximity 1
const int IRProximity2 = 7; // Pin untuk Sensor IR Proximity 2

int halanganCount1 = 0;
int timer = 0;

void setup() {
  servo1.attach(8); // Servo 1 dihubungkan ke pin 8
  servo2.attach(9); // Servo 2 dihubungkan ke pin 9
  
  pinMode(IRProximity1, INPUT);
  pinMode(IRProximity2, INPUT);
  
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Selamat Datang");
}

void loop() {
  char key = keypad.getKey();
  int irValue1 = digitalRead(IRProximity1);
  int irValue2 = digitalRead(IRProximity2);
  
  if (halanganCount1 < 3 && timer == 0) {
    lcd.clear();
    lcd.print("Masukkan 3 Coin");
  }
  
  if (irValue1 == LOW && timer == 0) {
    // Jika Sensor IR Proximity 1 terhalang dan timer belum berjalan
    halanganCount1++;
    timer = 10; // Waktu mundur 10 detik
    lcd.clear();
    
    if (halanganCount1 == 1) {
      lcd.print("Masukkan 2 Coin");
    } else if (halanganCount1 == 2) {
      lcd.print("Masukkan 1 Coin");
    }
    
    lcd.setCursor(0, 1);
    lcd.print("Waktu: " + String(timer) + "s ");
  }
  
  if (timer > 0) {
    // Waktu mundur berjalan
    lcd.setCursor(0, 1);
    lcd.print("Waktu: " + String(timer) + "s ");
    delay(1000);
    timer--;
  }
  
  if (irValue1 == HIGH && timer == 0) {
    // Reset timer jika Sensor IR Proximity 1 tidak terhalang
    timer = 0;
  }
  
  if (halanganCount1 == 3) {
    // Jika jumlah halangan di Sensor IR Proximity1 = 3
    if (timer == 0) {
      lcd.clear();
      lcd.print("Waktu Habis");
      delay(2000);
      halanganCount1 = 0;
      timer = 0;
      lcd.clear();
      lcd.print("Masukkan 3 Coin");
    } else {
      lcd.clear();
      lcd.print("Silahkan Pilih 1-2");
      if (key == '1') {
        if (irValue2 == LOW) {
          servo1.write(120);
          delay(1000);
          servo1.write(0);
          lcd.clear();
          lcd.print("Silahkan ambil");
          delay(2000);
          servo2.write(0);
          delay(2000);
        } else {
          lcd.clear();
          lcd.print("Maaf, barang habis");
          servo2.write(180);
          delay(2000);
          servo2.write(90); // Kembali ke posisi awal
          buzzerActive(2); // Aktifkan buzzer selama 2 detik
        }
      }
      halanganCount1 = 0;
      timer = 0;
      lcd.clear();
      lcd.print("Masukkan 3 Coin");
    }
  }
}

void buzzerActive(int duration) {
  tone(buzzerPin, 1000, duration * 1000);
}