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

LiquidCrystal_I2C lcd(0x27, 16, 2); // Alamat I2C LCD dapat berbeda, disesuaikan dengan LCD yang Anda miliki

const int coinAcceptorPin = 3;
const int relayPin = 10;
const int buttonPin = 7;

int coinValue = 0;
unsigned long startTime = 0;
unsigned long gameDuration = 0;
bool gameStarted = false;
bool coinInsertedFlag = false;

void setup() {
  Serial.begin(9600); // Mulai komunikasi serial
  pinMode(coinAcceptorPin, INPUT);
  pinMode(relayPin, OUTPUT);
  pinMode(buttonPin, INPUT_PULLUP);

  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("BRAIN GAMES");
  lcd.setCursor(0, 1);
  lcd.print("by Gusti Suasmika");
  delay(3000);
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Masukkan koin");
}

void loop() {
  if (!gameStarted) {
    checkCoinInsertion();
  } else {
    playGame();
  }
}

void checkCoinInsertion() {
  int coinInserted = digitalRead(coinAcceptorPin);
  
  if (coinInserted == HIGH) {
    if (!coinInsertedFlag) {
      coinInsertedFlag = true;
      startTime = millis();
    }
    
    coinValue += 20; // Menambahkan waktu bermain (detik) untuk setiap koin yang dimasukkan
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Koin diterima");
    lcd.setCursor(0, 1);
    lcd.print("Total: " + String(coinValue / 20) + " koin");
    delay(2000);
    Serial.println("Koin diterima, Total koin: " + String(coinValue / 20));
  } else if (coinInsertedFlag && millis() - startTime >= 2000) {
    // Jika tidak ada koin masuk dalam 2 detik, maka koin dianggap selesai dimasukkan
    coinInsertedFlag = false;
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Koin selesai");
    delay(100);
    Serial.println("Koin selesai dimasukkan");
  }
  
  if (!coinInsertedFlag && digitalRead(buttonPin) == LOW) {
    gameStarted = true;
    digitalWrite(relayPin, HIGH);
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Selamat Bermain");
    Serial.println("Game dimulai");
  }
}

void playGame() {
  unsigned long currentTime = millis();
  gameDuration = (currentTime - startTime) / 1000;
  
  lcd.setCursor(0, 1);
  lcd.print("Sisa waktu: " + String(coinValue - gameDuration) + " detik");
  
  if (coinValue - gameDuration <= 0) {
    digitalWrite(relayPin, LOW);
    delay(1000);
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Terimakasih, Besok");
    lcd.setCursor(0, 1);
    lcd.print("Kesini Lagi Ya..");
    delay(2000);
    Serial.println("Game selesai");
    
    // Reset game
    coinValue = 0;
    gameStarted = false;
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Masukkan koin");
  }
}