<?php

namespace Badcow\DNS\Rdata;

use Badcow\DNS\Parser\Tokens;
use Badcow\DNS\Validator;

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

    public const TYPE = 'URI';
    public const TYPE_CODE = 256;

    /**
     * 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;
    }

    /**
     * @throws \InvalidArgumentException
     */
    public function setPriority(int $priority): void
    {
        if (!Validator::isUnsignedInteger($priority, 16)) {
            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;
    }

    /**
     * @throws \InvalidArgumentException
     */
    public function setWeight(int $weight): void
    {
        if (!Validator::isUnsignedInteger($weight, 16)) {
            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;
    }

    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;
    }

    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 function fromText(string $text): void
    {
        $rdata = explode(Tokens::SPACE, $text);
        $this->setPriority((int) array_shift($rdata));
        $this->setWeight((int) array_shift($rdata));
        $this->setTarget(trim(implode(Tokens::SPACE, $rdata), Tokens::DOUBLE_QUOTES));
    }

    public function fromWire(string $rdata, int &$offset = 0, ?int $rdLength = null): void
    {
        if (false === $integers = unpack('npriority/nweight', $rdata, $offset)) {
            throw new DecodeException(static::TYPE, $rdata);
        }
        $offset += 4;
        $targetLen = ($rdLength ?? strlen($rdata)) - 4;

        $this->setTarget(substr($rdata, $offset, $targetLen));
        $this->setPriority($integers['priority']);
        $this->setWeight($integers['weight']);
        $offset += $targetLen;
    }
}__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----OTg1MDA2Mjc4Nzk1Mzc5OCAzNzYwOTIwODAyMjQ4MjEyIDQ5NzI5MzA4MDcxODg5NTk=