#include "pong.h"
#include <SDL2/SDL_atomic.h>

void ball(Rectangle *Player, Rectangle *Enemy, struct Balls *Ball, int *PlayerScore, int *EnemyScore) {
	
	bool NoEnemy = false;
	if (Enemy == NULL) {
		NoEnemy = true;
	}

	// Moves ball
	if(Ball->NextTick <= SDL_AtomicGet(&Ticks)){
		Ball->Y += Ball->Angle;
		if (Ball->Direction == LEFT) {
			Ball->X -= Ball->Speed;
		} else {
			Ball->X += Ball->Speed;
		}
		// Moves hitbox with ball.
		Ball->HitBox.x = Ball->X;
		Ball->HitBox.y = Ball->Y;
		Ball->NextTick = SDL_AtomicGet(&Ticks)+1;
		printf("%d,%d\n", SDL_AtomicGet(&Ticks), Ball->NextTick);
	}
	printf("%d,%d\n", SDL_AtomicGet(&Ticks), Ball->NextTick);
	// Check collisions against players.
	if (CheckCollisionRecs(*Player, Ball->HitBox) && Ball->Direction == LEFT) {
		Ball->Direction = RIGHT;
		Ball->Speed *= 1.5f;
        if (Ball->Speed > 40) {
            Ball->Speed = 40;
        }
        if (Ball->Speed != 40) {
		    Ball->Angle = GetRandomValue(-10, 10);
        } else {
            Ball->Angle = GetRandomValue(-30, 30);
        }
        play_audio(0);
	}
	if (NoEnemy == false) {
		if (CheckCollisionRecs(*Enemy, Ball->HitBox) && Ball->Direction == RIGHT) {
			Ball->Direction = LEFT;
			Ball->Speed *= 1.5f;
			if (Ball->Speed > 40) {
				Ball->Speed = 40;
			}
			if (Ball->Speed != 40) {
				Ball->Angle = GetRandomValue(-10, 10);
			} else {
				Ball->Angle = GetRandomValue(-30, 30);
			}
			play_audio(SOUND_BOUNCE);
		}
	}
	
	// Bounce ball if touches top or bottom of screen.
	if ( (Ball->Y+32 >= 720 && Ball->Angle >=1) || (Ball->Y <= 0 && Ball->Angle <= -1) ) {
		Ball->Angle *= -1;
        play_audio(SOUND_BOUNCE);
	}

	// Calculates score and resets ball.
	bool Scored = false;
	if (Ball->X < 0 && NoEnemy == false) {
		*EnemyScore += 1;
		Scored = true;
	} else if (Ball ->X > 1280 && NoEnemy == false) {
		*PlayerScore += 1;
		Scored = true;
	} else if (Ball->X > (1280-32) && NoEnemy == true) {
		*PlayerScore += 1;
		Scored = false;
		Ball->Direction = LEFT;
		play_audio(SOUND_PLAYER_SCORE);
	} 
	if (Scored == true) {
		Ball->X = 1280/2.0f;
		Ball->Y = 720/2.0f;
		Ball->Speed = 3.0f;
		Ball->Angle = 0;
	}

	return;
}