<?php

declare(strict_types=1);

namespace KTXF\SystemStore;

use DateTimeImmutable;
use InvalidArgumentException;

/**
 * Provider-neutral information about a blob in a system store.
 */
final readonly class BlobInfo
{
    public function __construct(
        public string $key,
        public string $mimeType,
        public int $size,
        public string $etag,
        public DateTimeImmutable $modifiedAt,
        public array $attributes = [],
    ) {
        if ($this->key === '') {
            throw new InvalidArgumentException('Blob key cannot be empty');
        }

        if ($this->mimeType === '') {
            throw new InvalidArgumentException('Blob MIME type cannot be empty');
        }

        if ($this->size < 0) {
            throw new InvalidArgumentException('Blob size cannot be negative');
        }

        if ($this->etag === '') {
            throw new InvalidArgumentException('Blob ETag cannot be empty');
        }
    }

}