<?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\event\entity;

use pocketmine\entity\Entity;

/**
 * Called when an entity takes damage from an entity sourced from another entity, for example being hit by a snowball thrown by a Player.
 */
class EntityDamageByChildEntityEvent extends EntityDamageByEntityEvent{
	/** @var int */
	private $childEntityEid;

	/**
	 * @param Entity  $damager
	 * @param Entity  $childEntity
	 * @param Entity  $entity
	 * @param int     $cause
	 * @param float   $damage
	 * @param float[] $modifiers
	 */
	public function __construct(Entity $damager, Entity $childEntity, Entity $entity, int $cause, float $damage, array $modifiers = []){
		$this->childEntityEid = $childEntity->getId();
		parent::__construct($damager, $entity, $cause, $damage, $modifiers);
	}

	/**
	 * Returns the entity which caused the damage, or null if the entity has been killed or closed.
	 *
	 * @return Entity|null
	 */
	public function getChild() : ?Entity{
		return $this->getEntity()->getLevel()->getServer()->findEntity($this->childEntityEid);
	}
}