#include <iostream>
#include <unistd.h>
#include <cstdlib>
#include "paddle.h"
#include "scoreBoard.h"
#include "ball.h"
#include "ansi.h"
#include "user.h"

using namespace std;

static PlayerPaddle player(1);
static ComputerPaddle computer(2);
static Ball ball;
static ScoreBoard score;

//helper functions
static void init();
static void cleanup();
static void draw();
static void update();
static void erase();

int main(void) {
  init();

  //game loop
  while(true)  {
    erase();
    update();
    draw();
    usleep(100000);
  }
  
  return 0;
}


static void
init() {
  cout << clearScreen;
  cout << cursorOff;
  setBlocking(false);
  setEcho(false);
  ball.reset();
  srand(time(0));
}


static void
cleanup() {
  cout << cursorOn;
  setBlocking(true);
  setEcho(true);
  cout << clearScreen;
}


static void
draw() {
  player.draw();
  computer.draw();
  score.draw();
  ball.draw();
}



static void
update() {
  int y;
  
  ball.update();
  computer.update(ball.getY());
  player.update();
  score.update();

  //check for ball collision
  if(ball.getX() <= player.getX()+1)  {
    y = ball.getY() - player.getY();
    if(y >= -2 && y<=3)
      ball.bouncePaddle(y);
    else {
      //ball left player 1 , player  2 scores!
      if(ball.getX() <= player.getX()) {
        ball.reset();
        score.addPlayer2();
      }
    }
  }
  
  if(ball.getX() >= computer.getX()-2) {
    y = ball.getY() - computer.getY();
    if(y >= -2 && y<=3)
      ball.bouncePaddle(y);
    else  {
      if(ball.getX()  >= computer.getX() -1) {
        ball.reset();
        score.addPlayer1();
      }

    }
  }

  //check for wall bounce
  if(ball.getY() <= 1 || ball.getY() >=23)
    ball.bounceWall();
}


static void
erase() {
  ball.erase();
  computer.erase();
  player.erase();
  score.erase();
}