<filename>src/examples/libpmemobj/pmpong/PongGameStatus.cpp
/*
 * Copyright 2017, Intel Corporation
 *
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 * modification, are permitted provided that the following conditions
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 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
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 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "PongGameStatus.hpp"
#include "Pool.hpp"

Pool *gamePool;

PongGameStatus::PongGameStatus()
{
	player1 = nvml::obj::make_persistent<Paddle>(
		VERTICAL_LINE_OFFSET + LINE_THICKNESS, WINDOW_HEIGHT / 2);
	player2 = nvml::obj::make_persistent<Paddle>(
		WINDOW_WIDTH - VERTICAL_LINE_OFFSET - PADDLE_WIDTH,
		WINDOW_HEIGHT / 2);
	ball = nvml::obj::make_persistent<Ball>(WINDOW_WIDTH / 2,
						WINDOW_HEIGHT / 2);
	menuItem = 0;
	isGameToResume = false;
	actualGameState = game_state::MENU;
}

PongGameStatus::~PongGameStatus()
{
	nvml::obj::transaction::exec_tx(
		gamePool->getGamePool()->getPoolToTransaction(), [&] {
			nvml::obj::delete_persistent<Paddle>(player1);
			nvml::obj::delete_persistent<Paddle>(player2);
			nvml::obj::delete_persistent<Ball>(ball);
		});
}

void
PongGameStatus::startBall(float ballSpeed)
{
	if (ball->getVelocity()->x == 0 && ball->getVelocity()->y == 0) {
		float x = randomizeFloatValue(1.5, 2.0);
		ball->setVelocityX(randomizeDirection() ? ballSpeed
							: -ballSpeed);
		ball->setVelocityY(randomizeDirection() ? x : -1 * x);
	}
}

void
PongGameStatus::reset()
{
	ball->init();
	player1->init();
	player2->init();
}

void
PongGameStatus::movePaddles()
{
	if (sf::Keyboard::isKeyPressed(sf::Keyboard::Key::W)) {
		player1->moveUp(PADDLE_VELOCITY_PLAYER);
	}
	if (sf::Keyboard::isKeyPressed(sf::Keyboard::Key::S)) {
		player1->moveDown(PADDLE_VELOCITY_PLAYER);
	}
	if (sf::Keyboard::isKeyPressed(sf::Keyboard::Key::Up)) {
		player2->moveUp(PADDLE_VELOCITY_PLAYER);
	}
	if (sf::Keyboard::isKeyPressed(sf::Keyboard::Key::Down)) {
		player2->moveDown(PADDLE_VELOCITY_PLAYER);
	}
}

void
PongGameStatus::lookForCollisions(bool increaseBallVelocity)
{
	player1->collisionWithBall(*ball, increaseBallVelocity);
	player2->collisionWithBall(*ball, increaseBallVelocity);
	ball->collisionWithWindow();
}

void
PongGameStatus::actualizeStatus()
{
	ball->move();
}

void
PongGameStatus::simulate()
{
	if (ball->getVelocity()->x > 0)
		player2->adjustPaddleYtoBall(*ball);
	if (ball->getVelocity()->x < 0)
		player1->adjustPaddleYtoBall(*ball);
}

void
PongGameStatus::setMenuItem(int numb)
{
	nvml::obj::transaction::exec_tx(
		gamePool->getGamePool()->getPoolToTransaction(),
		[&] { this->menuItem = numb; });
}

void
PongGameStatus::setIsGameToResume(bool isGameToRes)
{
	nvml::obj::transaction::exec_tx(
		gamePool->getGamePool()->getPoolToTransaction(),
		[&] { isGameToResume = isGameToRes; });
}

void
PongGameStatus::setGameState(game_state state)
{
	nvml::obj::transaction::exec_tx(
		gamePool->getGamePool()->getPoolToTransaction(),
		[&] { this->actualGameState = state; });
}

int
PongGameStatus::getMenuItem()
{
	return this->menuItem;
}

float
PongGameStatus::randomizeFloatValue(float min, float max)
{
	return (min + 1) +
		(((float)rand()) / (float)RAND_MAX) * (max - (min + 1));
}

bool
PongGameStatus::score()
{
	if (ball->getBallShape().getPosition().x > WINDOW_WIDTH -
		    VERTICAL_LINE_OFFSET + LINE_THICKNESS -
		    ball->getBallShape().getRadius() * 2) {
		player1->addPoint();
		reset();
		return true;
	}
	if (ball->getBallShape().getPosition().x <
	    VERTICAL_LINE_OFFSET - LINE_THICKNESS) {
		player2->addPoint();
		reset();
		return true;
	}
	return false;
}

bool
PongGameStatus::checkIfAnyPlayerWon()
{
	if (getPlayer1()->getPoints() == POINTS_TO_WIN ||
	    getPlayer2()->getPoints() == POINTS_TO_WIN)
		return true;
	return false;
}

bool
PongGameStatus::randomizeDirection()
{
	static const int shift = static_cast<int>(std::log2(RAND_MAX));
	return (rand() >> shift) & 1;
}

bool
PongGameStatus::getIsGameToResume()
{
	return this->isGameToResume;
}

nvml::obj::persistent_ptr<Paddle>
PongGameStatus::getPlayer1()
{
	return this->player1;
}

nvml::obj::persistent_ptr<Paddle>
PongGameStatus::getPlayer2()
{
	return this->player2;
}

nvml::obj::persistent_ptr<Ball>
PongGameStatus::getBall()
{
	return this->ball;
}

game_state
PongGameStatus::getGameState()
{
	return this->actualGameState;
}
