<?php

namespace Badcow\DNS\Rdata;

use Badcow\DNS\Parser\Tokens;

/**
 * {@link https://tools.ietf.org/html/rfc7553}.
 */
class URI implements RdataInterface
{
	use RdataTrait;

	const TYPE = 'URI';
	const TYPE_CODE = 256;
	const MAX_PRIORITY = 65535;
	const MAX_WEIGHT = 65535;

	/**
	 * This field holds the priority of the target URI in this RR.  Its
	 * range is 0-65535.  A client MUST attempt to contact the URI with the
	 * lowest-numbered priority it can reach; URIs with the same priority
	 * SHOULD be selected according to probabilities defined by the weight
	 * field.
	 *
	 * @var int
	 */
	private $priority;

	/**
	 * This field holds the server selection mechanism.  The weight field
	 * specifies a relative weight for entries with the same priority.
	 * Larger weights SHOULD be given a proportionately higher probability
	 * of being selected.  The range of this number is 0-65535.
	 *
	 * @var int
	 */
	private $weight;

	/** @var string */
	private $target;


	/**
	 * @return int
	 */
	public function getPriority(): ?int
	{
		return $this->priority;
	}


	/**
	 * @param int $priority
	 *
	 * @throws \InvalidArgumentException
	 */
	public function setPriority(int $priority): void
	{
		if ($priority < 0 || $priority > static::MAX_PRIORITY) {
		    throw new \InvalidArgumentException('Priority must be an unsigned integer on the range [0-65535]');
		}

		$this->priority = $priority;
	}


	/**
	 * @return int
	 */
	public function getWeight(): ?int
	{
		return $this->weight;
	}


	/**
	 * @param int $weight
	 *
	 * @throws \InvalidArgumentException
	 */
	public function setWeight(int $weight): void
	{
		if ($weight < 0 || $weight > static::MAX_WEIGHT) {
		    throw new \InvalidArgumentException('Weight must be an unsigned integer on the range [0-65535]');
		}

		$this->weight = $weight;
	}


	/**
	 * @return string
	 */
	public function getTarget(): ?string
	{
		return $this->target;
	}


	/**
	 * @param string $target
	 */
	public function setTarget(string $target): void
	{
		if (false === filter_var($target, FILTER_VALIDATE_URL)) {
		    throw new \InvalidArgumentException(sprintf('The target "%s" is not a valid URI.', $target));
		}

		$this->target = $target;
	}


	/**
	 * {@inheritdoc}
	 */
	public function toText(): string
	{
		return sprintf('%d %d "%s"',
		    $this->priority,
		    $this->weight,
		    $this->target
		);
	}


	public function toWire(): string
	{
		return pack('nn', $this->priority, $this->weight).$this->target;
	}


	public static function fromText(string $text): RdataInterface
	{
		$rdata = explode(Tokens::SPACE, $text);
		$uri = new self();
		$uri->setPriority((int) array_shift($rdata));
		$uri->setWeight((int) array_shift($rdata));
		$target = implode(' ', $rdata);
		$uri->setTarget(trim($target, '"'));

		return $uri;
	}


	public static function fromWire(string $rdata, int &$offset = 0, ?int $rdLength = null): RdataInterface
	{
		$integers = unpack('npriority/nweight', $rdata, $offset);
		$offset += 4;
		$targetLen = ($rdLength ?? strlen($rdata)) - 4;

		$uri = new self();
		$uri->setTarget(substr($rdata, $offset, $targetLen));
		$uri->setPriority($integers['priority']);
		$uri->setWeight($integers['weight']);
		$offset += $targetLen;

		return $uri;
	}
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----NTAwMzA4Mzc1MzIwOTY3MCA2MDMxNTI5NzI2MTE2OTA1IDU4MTEyOTI4NjMyNDAyODY=