int PadSX_Y, PadDX_Y, hWd, directionX, p1_Score, p2_Score;
float Player_Movement, Player2_Movement, Player_Speed, Ball_Speed, BallX, BallY,  directionY, difficulty;

void setup(){
  fullScreen(1);
  background(0);
  stroke(255);
  rectMode(CENTER);
  ellipseMode(CENTER);
  textSize(80);

  PadSX_Y = height/2;
  PadDX_Y = PadSX_Y;
  hWd = width/2;
  Player_Movement=0;
  Player2_Movement=0;
  Player_Speed = 5;
  Ball_Speed = 5;
  BallX = width/2;
  BallY = height/2;
  directionY=0.25;
  directionX=-1;
  difficulty=0.05;
  p1_Score=0;
  p2_Score=0;
}

void drawField(){
  //Creazione dei Muri
  strokeWeight(10);
  text(p1_Score, width*0.4, height*0.3);
  text(p2_Score, width*0.6-40, height*0.3);

  line(width*0.1, height*0.2, width*0.9, height*0.2);//Muro Nord
  line(width*0.1, height*0.2, width*0.1, height*0.8);//Muro Ovest
  line(width*0.1, height*0.8, width*0.9, height*0.8);//Muro Sud
  line(width*0.9, height*0.8, width*0.9, height*0.2);//Muro Est
  //Linea tratteggiata del centro campo
  strokeWeight(2);
  stroke(130);
  line(hWd, height*0.23, hWd, height*0.29);
  line(hWd, height*0.35, hWd, height*0.41);
  line(hWd, height*0.47, hWd, height*0.53);
  line(hWd, height*0.59, hWd, height*0.65);
  line(hWd, height*0.71, hWd, height*0.77);
  stroke(255);
}

void draw(){
  background(0);
  drawField(); //Disegno Campo

  //Disegno Padella Sinistra
  rect(width*0.125, PadSX_Y, 15, height*0.12);
  //Disegno Padella Destra
  rect(width*0.875, PadDX_Y, 15, height*0.12);
  //Disegno Palla
  rect(BallX, BallY, 30, 30);

  //Movimento Giocatore 1
  if(!keyPressed){
    Player2_Movement=0;
  }
  if( !(PadSX_Y>height*0.8-height*0.06 && Player2_Movement >0) && !(PadSX_Y<height*0.2+height*0.06 && Player2_Movement<0)){  //Questo if è scritto ammerda, sistemare
    PadSX_Y += Player2_Movement;
  }

  //Movimento Giocatore 2
  if(!keyPressed){
    Player_Movement=0;
  }
  if(!(PadDX_Y>height*0.8-height*0.06 && Player_Movement >0) && !(PadDX_Y<height*0.2+height*0.06 && Player_Movement<0)){ //Pure questo
    PadDX_Y += Player_Movement;
  }

  //Movimento Palla
  BallX += directionX * Ball_Speed;
  BallY += directionY*Ball_Speed;

  //Controllo Collisioni
  padCollision();
  wallCollision();
  if(BallX<width*0.125-(15/2)){
     roundReset("p1");
  }else{
     if(BallX>width*0.875+(15/2)){
      roundReset("p2");
     }
  }

}

void roundReset(String winner){
   if(winner=="p1"){
      p2_Score++;
      BallX=width/2;
      BallY=height/2;
      directionX=1;
   }else{
      p1_Score++;
      BallX=width/2;
      BallY=height/2;
      directionX=-1;
   }
   directionY=0.25;
}

void padCollision(){
   if(  (BallX <width*0.125+30 && PadSX_Y+height*0.06>BallY && PadSX_Y-height*0.06<BallY ) ){
         float newDirection = map(BallY, PadSX_Y-height*0.06, PadSX_Y+height*0.06, -2, 2);
         directionY = newDirection;
         Ball_Speed+=difficulty;
         directionX*=-1;
     }
}

void wallCollision(){
   if( BallY<height*0.2+15 || BallY>height*0.8-15){
       directionY*=-1;
    }
}

void keyPressed(){

    if(keyPressed){
     if(key == CODED){
        if(keyCode == DOWN){
           Player_Movement = 0;

             Player_Movement = 1*Player_Speed;

        }else{
           if(keyCode == UP){
              Player_Movement = 0;
              Player_Movement = -1*Player_Speed;
           }
        }
     }
     if(key == 's'){
            Player2_Movement = 0;
            Player2_Movement = 1*Player_Speed;
            println("Check S");
        }else{
           if(key== 'w'){
               Player2_Movement=0;
               Player2_Movement = -1*Player_Speed;
               println("Check W");
         }
        }
  }
}