<?php

/**
 * This file is part of the ramsey/uuid library
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 *
 * @copyright Copyright (c) Ben Ramsey <ben@benramsey.com>
 * @license http://opensource.org/licenses/MIT MIT
 */

declare(strict_types=1);

namespace Ramsey\Uuid\Rfc4122;

use Ramsey\Uuid\Uuid;

/**
 * Provides common functionality for handling the version, as defined by RFC 4122
 *
 * @psalm-immutable
 */
trait VersionTrait
{
    /**
     * Returns the version
     */
    abstract public function getVersion(): ?int;

    /**
     * Returns true if these fields represent a max UUID
     */
    abstract public function isMax(): bool;

    /**
     * Returns true if these fields represent a nil UUID
     */
    abstract public function isNil(): bool;

    /**
     * Returns true if the version matches one of those defined by RFC 4122
     *
     * @return bool True if the UUID version is valid, false otherwise
     */
    private function isCorrectVersion(): bool
    {
        if ($this->isNil() || $this->isMax()) {
            return true;
        }

        return match ($this->getVersion()) {
            Uuid::UUID_TYPE_TIME, Uuid::UUID_TYPE_DCE_SECURITY,
            Uuid::UUID_TYPE_HASH_MD5, Uuid::UUID_TYPE_RANDOM,
            Uuid::UUID_TYPE_HASH_SHA1, Uuid::UUID_TYPE_REORDERED_TIME,
            Uuid::UUID_TYPE_UNIX_TIME => true,
            default => false,
        };
    }
}
