<?php

declare(strict_types=1);

namespace App\Services\Sitemaps;

use Illuminate\Support\Facades\Storage;

/**
 * Writes every document from a published release to the public disk so nginx
 * can serve sitemap.xml and sitemaps/{name}.xml as plain static files,
 * bypassing PHP entirely on subsequent requests.
 */
final class SitemapStaticPublisher
{
    public function __construct(private readonly SitemapReleaseManager $releases)
    {
    }

    public function enabled(): bool
    {
        return (bool) config('sitemaps.static_publish.enabled', true);
    }

    /**
     * Copy all documents from the given release to the public disk.
     *
     * @return array{written: int, skipped: int}
     */
    public function publish(string $releaseId): array
    {
        $manifest = $this->releases->readManifest($releaseId);

        if ($manifest === null) {
            return ['written' => 0, 'skipped' => 0];
        }

        $disk = Storage::disk($this->publicDisk());
        $documents = (array) ($manifest['documents'] ?? []);

        $written = 0;
        $skipped = 0;

        foreach ($documents as $documentName => $relativePath) {
            $content = $this->releases->getDocument($releaseId, (string) $documentName);

            if (! is_string($content) || $content === '') {
                $skipped++;
                continue;
            }

            $disk->put((string) $relativePath, $content);
            $written++;
        }

        return ['written' => $written, 'skipped' => $skipped];
    }

    private function publicDisk(): string
    {
        return (string) config('sitemaps.static_publish.disk', 'sitemaps_public');
    }
}