<?php

/*
 *
 *  ____            _        _   __  __ _                  __  __ ____
 * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
 * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
 * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
 * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * @author PocketMine Team
 * @link http://www.pocketmine.net/
 *
 *
*/

declare(strict_types=1);

namespace pocketmine\item;

use pocketmine\entity\Entity;
use pocketmine\entity\projectile\Projectile;
use pocketmine\event\entity\ProjectileLaunchEvent;
use pocketmine\math\Vector3;
use pocketmine\network\mcpe\protocol\LevelSoundEventPacket;
use pocketmine\nbt\tag\CompoundTag;
use pocketmine\Player;

abstract class ProjectileItem extends Item{

	abstract public function getProjectileEntityType() : string;

	abstract public function getThrowForce() : float;

	/**
	 * Helper function to apply extra NBT tags to pass to the created projectile.
	 *
	 * @param CompoundTag $tag
	 */
	protected function addExtraTags(CompoundTag $tag) : void{

	}

	public function onClickAir(Player $player, Vector3 $directionVector) : bool{
		$nbt = Entity::createBaseNBT($player->add(0, $player->getEyeHeight(), 0), $directionVector, $player->yaw, $player->pitch);
		$this->addExtraTags($nbt);

		$projectile = Entity::createEntity($this->getProjectileEntityType(), $player->getLevel(), $nbt, $player);
		if($projectile !== null){
			$projectile->setMotion($projectile->getMotion()->multiply($this->getThrowForce()));
		}

		$this->count--;

		if($projectile instanceof Projectile){
			$player->getServer()->getPluginManager()->callEvent($projectileEv = new ProjectileLaunchEvent($projectile));
			if($projectileEv->isCancelled()){
				$projectile->flagForDespawn();
			}else{
				$projectile->spawnToAll();

				//319 is the Player's entity type ID in MCPE, with all its flags (which we don't know)
				//without this, it doesn't work at all.
				$player->getLevel()->broadcastLevelSoundEvent($player, LevelSoundEventPacket::SOUND_THROW, 319);
			}
		}elseif($projectile !== null){
			$projectile->spawnToAll();
		}else{
			return false;
		}

		return true;
	}
}