/*  CARA BERMAIN PIN PONG ARDUINO
  .PUSHBUTTON KUNING UNTUK ATAS
  .PUSHBUTTON BIRU UNTUK BAWAH

  SUMBER CODE : 
  TIKTOK : @vickyrnf
  INSTAGRAM : @vickyrnf
  ****SELAMAT BERMAIN****
  */

#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define BALL_SIZE 2
#define PADDLE_WIDTH 4
#define PADDLE_HEIGHT 16
#define PADDLE_SPEED 2

Adafruit_SSD1306 display(128, 64, &Wire, -1);

int bt1 = 2;
int bt2 = 3;

int ballX = 64, ballY = 32, ballDX = 1, ballDY = 1;
int paddleY = 32;
int score = 0;

void setup() {
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(0, 0);
  display.print("Score: ");
  display.setCursor(64, 0);
  display.print(score);
  display.display();

  pinMode(bt1, INPUT_PULLUP);
  pinMode(bt2, INPUT_PULLUP);
}

void loop() {
  int ks1 =digitalRead(bt1);
  int ks2 =digitalRead(bt2);

  ballX += ballDX;
  ballY += ballDY;

  if (ballX < 0 || ballX > 127) {
    if (ballX < 0) score++;
    ballX = 64;
    ballY = 32;
    ballDX = -ballDX;
  }

  if (ballY < 0 || ballY + BALL_SIZE > 63) {
    ballDY = -ballDY;
  }

  if (ballX < 16 + PADDLE_WIDTH && ballY + BALL_SIZE > paddleY && ballY < paddleY + PADDLE_HEIGHT) {
    ballDX = -ballDX;
    ballDY = (ballY + BALL_SIZE / 2) - (paddleY + PADDLE_HEIGHT / 2);
    ballDY /= 4;
    ballDX += random(-2, 2);
    ballDY += random(-2, 2);
  }

  if(ks1 == LOW){
    paddleY -= PADDLE_SPEED;
  }
  if(ks2 == LOW){
    paddleY += PADDLE_SPEED;
  }

  if (paddleY < 0) paddleY = 0;
  if (paddleY + PADDLE_HEIGHT > 63) paddleY = 63 - PADDLE_HEIGHT;

  display.clearDisplay();
  display.setCursor(0, 0);
  display.print("Score: ");
  display.setCursor(64, 0);
  display.print(score);
  display.fillRect(0, paddleY, PADDLE_WIDTH, PADDLE_HEIGHT, WHITE);
  display.fillRect(ballX, ballY, BALL_SIZE, BALL_SIZE, WHITE);
  display.display();

  delay(10);
}