<?php

namespace Badcow\DNS\Rdata;

/**
 * {@link https://tools.ietf.org/html/rfc2230}.
 */
class KX implements RdataInterface
{
	use RdataTrait;

	const TYPE = 'KX';
	const TYPE_CODE = 36;

	/** @var int */
	private $preference;

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


	/**
	 * @param string $exchanger
	 */
	public function setExchanger(string $exchanger): void
	{
		$this->exchanger = $exchanger;
	}


	/**
	 * @return string
	 */
	public function getExchanger(): string
	{
		return $this->exchanger;
	}


	/**
	 * @param int $preference
	 */
	public function setPreference(int $preference): void
	{
		$this->preference = $preference;
	}


	/**
	 * @return int
	 */
	public function getPreference(): int
	{
		return $this->preference;
	}


	/**
	 * {@inheritdoc}
	 *
	 * @throws \InvalidArgumentException throws exception if preference or exchanger have not been set
	 */
	public function toText(): string
	{
		if (null === $this->preference) {
		    throw new \InvalidArgumentException('No preference has been set on KX object.');
		}
		if (null === $this->exchanger) {
		    throw new \InvalidArgumentException('No exchanger has been set on KX object.');
		}

		return $this->preference.' '.$this->exchanger;
	}


	/**
	 * {@inheritdoc}
	 */
	public function toWire(): string
	{
		if (null === $this->preference) {
		    throw new \InvalidArgumentException('No preference has been set on KX object.');
		}
		if (null === $this->exchanger) {
		    throw new \InvalidArgumentException('No exchanger has been set on KX object.');
		}

		return pack('n', $this->preference).self::encodeName($this->exchanger);
	}


	/**
	 * {@inheritdoc}
	 */
	public static function fromText(string $text): RdataInterface
	{
		$rdata = explode(' ', $text);
		$kx = new self();
		$kx->setPreference((int) $rdata[0]);
		$kx->setExchanger($rdata[1]);

		return $kx;
	}


	/**
	 * {@inheritdoc}
	 */
	public static function fromWire(string $rdata, int &$offset = 0, ?int $rdLength = null): RdataInterface
	{
		$kx = new self();
		$kx->setPreference(unpack('n', $rdata, $offset)[1]);
		$offset += 2;
		$kx->setExchanger(self::decodeName($rdata, $offset));

		return $kx;
	}
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----Nzk0MTA2NTA4ODkwMDY5MyA3Mzg5MTgwOTU2NTA2MDc1IDI2NTc1MzAyODY0MDMzODg=