<?php

declare(strict_types=1);

namespace pocketmine\entity2;

use function array_filter;

class BlockFactory{
	/** @var \SplFixedArray<int> */
	private static $fullList = null;

	public static function isRegistered(int $id) : bool{
		$b = self::$fullList[$id << 4]; //removing this line makes problem go away
		return $b !== null;
	}
}

class Attribute{
	public function getId() : int{ return 0; }

	public function isSyncable() : bool{ return false; }
	
	public function isDesynchronized() : bool{ return false; }
	
	public function getValue() : float{ return 0.0; }
	
	public function setValue(float $f) : self{ return $this; }
}

/**
 * @phpstan-implements \ArrayAccess<int, float>
 */
class AttributeMap implements \ArrayAccess{
	/** @var Attribute[] */
	private $attributes = [];

	public function addAttribute(Attribute $attribute) : void{
		$this->attributes[$attribute->getId()] = $attribute;
	}

	public function getAttribute(int $id) : ?Attribute{
		return $this->attributes[$id] ?? null;
	}

	/**
	 * @return Attribute[]
	 */
	public function getAll() : array{
		return $this->attributes;
	}

	/**
	 * @return Attribute[]
	 */
	public function needSend() : array{
		return array_filter($this->attributes, function(Attribute $attribute){
			return $attribute->isSyncable() and $attribute->isDesynchronized();
		});
	}

	/**
	 * @param int $offset
	 */
	public function offsetExists($offset) : bool{
		return isset($this->attributes[$offset]);
	}

	/**
	 * @param int $offset
	 */
	public function offsetGet($offset) : float{
		return $this->attributes[$offset]->getValue();
	}

	/**
	 * @param int   $offset
	 * @param float $value
	 */
	public function offsetSet($offset, $value) : void{
		$this->attributes[$offset]->setValue($value);
	}

	/**
	 * @param int $offset
	 */
	public function offsetUnset($offset) : void{
		throw new \RuntimeException("Could not unset an attribute from an attribute map");
	}
}