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

// Setup LCD
LiquidCrystal_I2C lcd(0x27, 16, 2);  // Alamat I2C untuk LCD

// Setup Keypad
const byte ROWS = 4;  // Empat baris
const byte COLS = 4;  // Empat kolom
char keys[ROWS][COLS] = {
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'*', '0', '#', 'D'}
};
byte rowPins[ROWS] = {A0, A1, A2, A3};  // Baris
byte colPins[COLS] = {8, 9, 10, 11};    // Kolom
Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

// LED pins
const int ledPins[4] = {2, 3, 4, 5};
const int ledWrong = 6;
const int ledCorrect = 7;

int randomNum;
char userGuess;  // Variabel untuk menyimpan tebakan pengguna

void setup() {
  // Initialize LCD
  lcd.init();
  lcd.backlight();
  
  // Initialize LED pins
  for (int i = 0; i < 4; i++) {
    pinMode(ledPins[i], OUTPUT);
  }
  pinMode(ledWrong, OUTPUT);
  pinMode(ledCorrect, OUTPUT);
  
  // Display initial message
  lcd.setCursor(3, 0);
  lcd.print("Game Tebak");
  lcd.setCursor(5, 1);
  lcd.print("Biner");
  delay(2000);
  lcd.clear();
  
  // Generate random number from 0 to 9
  randomNum = random(0, 10);
  displayBinary(randomNum);
  lcd.setCursor(3, 0);
  lcd.print("Ayo Tebak!");
}

void loop() {
  char key = keypad.getKey();
  if (key) {
    // Validasi input dari keypad
    if (key >= '0' && key <= '9') {
      // Simpan tebakan
      userGuess = key;
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Tebakan: ");
      lcd.print(userGuess);  // Tampilkan tebakan
    }
    
    if (key == '#') {
      // Tombol enter ditekan
      lcd.clear();
      lcd.setCursor(0, 0);
      
      // Logika penilaian
      if (userGuess == (randomNum + '0')) {
        digitalWrite(ledCorrect, HIGH);
        lcd.print("Tebakan Benar!");
        delay(2000);
        runningText("Tebakan Benar!");
      } else {
        digitalWrite(ledWrong, HIGH);
        lcd.print("Tebakan Salah!");
        delay(2000);
        runningText("Tebakan Salah!");
      }
      
      // Reset LED
      digitalWrite(ledCorrect, LOW);
      digitalWrite(ledWrong, LOW);
      delay(1000);
      
      // Persiapkan permainan baru
      randomNum = random(0, 10); // Generate random number again
      displayBinary(randomNum);
      lcd.clear();
      lcd.setCursor(3, 0);
      lcd.print("Ayo Tebak!"); // Show prompt for next guess
    }
  }
}

void displayBinary(int num) {
  for (int i = 0; i < 4; i++) {
    int bit = (num >> (3 - i)) & 1;  // Mengambil bit biner
    digitalWrite(ledPins[i], bit);   // Menyalakan LED sesuai bit
  }
}

void runningText(const char *message) {
  for (int i = 0; message[i] != '\0'; i++) {
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print(message + i);  // Tampilkan dari posisi i
    delay(500);  // Kecepatan running text
    if (message[i + 1] == '\0') {
      i = -1;  // Reset loop jika mencapai akhir pesan
      break;
    }
  }
}