<?php

namespace Badcow\DNS\Rdata;

use Badcow\DNS\Message;

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

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

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

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

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

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

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

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

    /**
     * @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;
    }

    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', $this->preference).Message::encodeName($this->exchanger);
    }

    public function fromText(string $text): void
    {
        $rdata = explode(' ', $text);
        $this->setPreference((int) $rdata[0]);
        $this->setExchanger($rdata[1]);
    }

    public function fromWire(string $rdata, int &$offset = 0, ?int $rdLength = null): void
    {
        if (false === $preference = unpack('n', $rdata, $offset)) {
            throw new DecodeException(static::TYPE, $rdata);
        }
        $this->setPreference($preference[1]);
        $offset += 2;
        $this->setExchanger(Message::decodeName($rdata, $offset));
    }
}__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----Njk2NzY1MjM5MTc5ODgxMiA1ODk0MDc1MzMxMzM1NjM0IDQ3NDI5NjUwNTgwODk1MDg=