#include "game.h"

// TODO put in config (EVERYTHING SHALL GO IN CONFIG, THE WHOLE CODE SHALL GO IN CONFIIIIIIIIG)
#define MISSILE_SPEED 5
#define TORPEDO_SPEED MISSILE_SPEED

#define ISPRESSED(X) window.isPressed({X, false})

void Game::managePlayerMoves(PlayerDef& pdef, unsigned& playerX){
	if (ISPRESSED(pdef.keys.left)){
		if(playerX < conf.playersSpeed) playerX = 0;
		else playerX = playerX-conf.playersSpeed;
	}
	if (ISPRESSED(pdef.keys.right)){
		if(playerX+conf.playersSpeed >= pm.getScreenWidth()) playerX = pm.getScreenWidth() - 1;
		else playerX = playerX+conf.playersSpeed;
	}
	if(ISPRESSED(pdef.keys.shoot)){
		torpedos.emplace_back(playerX+ conf.playersWidth / 2, pm.getScreenHeight() - PLAYER_HEIGHT);
	}
}

/** Makes the players play once
*/
void Game::managePlayers(){
	managePlayerMoves(conf.p1Def, p1.x);
	if(playMode==PlayMode::TWO_LOCAL)managePlayerMoves(conf.p2Def, p2.x);
}

/** Makes the invaders play once, and check lower bounds
 *
 * @return true if the invaders went down from one line (and we should check lower boundary), else false
*/
bool Game::manageInvaders(){
	if(direction){ // go to the right
		int end = basePos.getX(); // start position
		end+= grid.size()*conf.invadersSize; // add the aliens
		end+= (grid.size()-1)*conf.invadersDistance; // add the invadersDistance between aliens

		// you got the end position of the alien crowd !

		if(end+conf.invadersSpeed < pm.getScreenWidth()){
			basePos.setX(basePos.getX()+conf.invadersSpeed);
		}else{
			basePos.setY(basePos.getY()+conf.invadersSize);
			direction = !direction;
			return true;
		}
	}else{
		if(basePos.getX()>=conf.invadersSpeed){
			basePos.setX(basePos.getX()-conf.invadersSpeed);
		}else{
			basePos.setY(basePos.getY()+conf.invadersSize);
			direction = !direction;
			return true;
		}
	}
	return false;

}

/** makes projectiles move, and manage collisions between them and everything
 *
 * @return 1 if the invaders are all dead, 2 if the player is dead, else 0
*/
void Game::remCollidingProjectiles(){

	auto miss = missiles.begin();
	auto tor = torpedos.begin();

	while(miss != missiles.end()){
		bool wasColling = false;
		while(tor != torpedos.end()){

			// missiles can't be right under torpedos, so that must means they are colliding in Y
			if(miss->getY()+conf.missilesLength < tor->getY()){

			}
			if(lineCollideCheck( // now check if they collide in X
					miss->getX(), miss->getX()+conf.missilesWidth,
					tor->getX(), tor->getX()+conf.torpedosWidth)){
				missiles.erase(miss);
				torpedos.erase(tor);
				wasColling = true;
				break;
			}
			++tor;
		}
		/* if it was colling, it was removed and his position is now replaced by the next.
		 * else, go to the next
		 */
		if(!wasColling)++miss;
	}
}

void Game::moveMissiles() {
	auto miss = missiles.begin();
	while (miss != missiles.end()) {
		if (miss->getY() >= pm.getScreenHeight())missiles.erase(miss);
		else {
			miss->setY(miss->getY()+MISSILE_SPEED);
			++miss;
		}
	}
}

void Game::moveTorpedos() {
	auto tor = torpedos.begin();
	while (tor != torpedos.end()) {
		if (tor->getY() <= 0)torpedos.erase(tor); // TODO maybe wait for it to be 100% offscreen
		else{
			tor->setY(tor->getY() - TORPEDO_SPEED);
			++tor;
		}
	}
}

bool Game::checkMissilesAndPlayers() {
	for(missile& miss : missiles){
		if(miss.getY()<=PLAYER_HEIGHT){ // colliding on Y
			if(lineCollideCheck( // now check collision on X
					miss.getX(), miss.getX()+conf.missilesWidth,
					p1.x, p1.x+conf.playersWidth)){
				return true;
			}
		}
	}
	return false;
}

bool Game::checkTorpedosAndInvaders() {
	return false;
}