class Pong
{
  //Ball parameters
  float ballX = 200;
  float ballY = 200;

  //Location of players
  float compX = 20, compY = 200;
  float humX = 380, humY = 200;

  //Size of stick
  float stickW = 10, stickH = 60;

  //Direction
  int ballXdirection = 1;
  int ballYdirection = 1;


  Pong(int _level)
  {
    level = _level;
    ballSize = ballSize - level * 1.7;
    ballSpeed = ballSpeed + level * 1.1;
    playgame = -1;
  }
  //-----------------------------------------------------------------------------
  void drawGameTable()
  {
    //External Box and middle line
    rectMode(CORNER); 
    strokeWeight(2);
    stroke(255);
    fill(0);

    rect(5, 5, 390, 390);
    line(200,0,200,400);

    //Game values
    rect(135,10,125,40);

    textFont(font, 30); 
    fill(255); 
    text(scoreC, 160, 32); 
    text(scoreH, 225, 32); 
    text("x",192,32);
    textFont(font, 15); 
    text("Level ", 170, 47); 
    text(level, 220, 47); 


    // If Mouse is pressed play the game - pressed again - reset game
    if (mousePressed == true){
      playgame = playgame * -1;
    }
    else if (playgame < 0) {
      rectMode(CORNERS);
      fill(200,200,200,50);
      rect(0,0,400,400); 

      if ((scoreH == 0) && (scoreC == 0)){
        fill(255);
        text("PRESS MOUSE TO START",100,200);
      }
      else{
        fill(255);
        text("PRESS MOUSE TO CONTINUE",100,200);
      }
    }

    if (playgame > 0){
      pong.moveComputerStick();
      pong.moveHumanStick();
      pong.drawBall();
    }
  }
  //-----------------------------------------------------------------------------
  void drawBall()
  {
    // Update the position of the ball
    ballX = ballX + ( ballSpeed * ballXdirection );
    ballY = ballY + ( ballSpeed * ballYdirection );

    //Ball on Human side and within human paddle?
    if((ballX > humX - ballSize/2) && (ballX > 200)){
      if ((ballY <= humY + stickH) && (ballY >= humY - stickH)){
        ballXdirection *= -1;
        scoreH = scoreH + 1;
      }
    }

    //Ball on Comp side and within Comp paddle?
    if ((ballX - ballSize/2 < compX) && (ballX < 200)){
      if ((ballY <= compY + stickH) && (ballY >= compY - stickH)){
        ballXdirection *= -1;
        scoreC = scoreC + 1;
      }
    }

    //Dont let ball go of screen vertically
    if ((ballY > screenH - ballSize/2) || (ballY < ballSize/2)){
      ballYdirection *= -1;
    }

    //Resset Game if ball falls off the screen
    if ((ballX > humX) || (ballX < compX)){
      playgame = -1;
      scoreH = 0;
      scoreC = 0;
      ballX = 200;
      ballY = 200;
    }

    //Draw Ball
    fill(random(255),random(255),random(255));
    ellipseMode(CENTER);
    ellipse(ballX, ballY, ballSize, ballSize); 
  }
  //-----------------------------------------------------------------------------
  void moveHumanStick()
  {
    rectMode(CENTER);

    //Human Stick Limits
    if (pmouseY > screenH) { 
      humY = screenH; 
    }
    else if (pmouseY < 0) { 
      humY = 0; 
    }
    else { 
      humY = pmouseY; 
    }
    //Draw Human Paddle
    fill(0,0,255);
    rect(humX,humY,stickW,stickH);

  }
  //-----------------------------------------------------------------------------
  void moveComputerStick()
  {
    rectMode(CENTER);

    //Computer Stick Limits
    if (compY > screenH) { 
      compY = screenH; 
    }
    else if (compY < 0) { 
      compY = 0; 
    }
    else{ 
      compY = compY; 
    }
    //Computer stick
    fill(255,0,0);
    compY = ballY;
    rect(compX,compY,stickW,stickH);
  }
}