<?php

declare(strict_types=1);

/**
 * Wersja statycznego pliku w public/ — timestamp modyfikacji (cache busting po FTP).
 */
function publicAssetVersion(string $publicDir, string $relativePath): string
{
    $path = $publicDir . DIRECTORY_SEPARATOR . str_replace('/', DIRECTORY_SEPARATOR, ltrim($relativePath, '/'));
    if (!is_file($path)) {
        return '0';
    }

    $mtime = filemtime($path);

    return $mtime !== false ? (string) $mtime : '0';
}

/**
 * Najnowszy mtime wśród pliku głównego i wszystkich .js w katalogach modules/ i locales/.
 */
function publicJsBundleVersion(string $publicDir, string $entryRelativePath): string
{
    $versions = [(int) publicAssetVersion($publicDir, $entryRelativePath)];
    $dirs = [
        'assets/js/modules',
        'assets/js/locales',
    ];

    foreach ($dirs as $relativeDir) {
        $modulesDir = $publicDir . DIRECTORY_SEPARATOR . str_replace('/', DIRECTORY_SEPARATOR, ltrim($relativeDir, '/'));
        if (!is_dir($modulesDir)) {
            continue;
        }

        $iterator = new RecursiveIteratorIterator(
            new RecursiveDirectoryIterator($modulesDir, FilesystemIterator::SKIP_DOTS)
        );
        foreach ($iterator as $file) {
            if ($file->isFile() && strtolower($file->getExtension()) === 'js') {
                $versions[] = (int) $file->getMTime();
            }
        }
    }

    return (string) max($versions);
}

function assetVersionAttr(string $version): string
{
    return htmlspecialchars($version, ENT_QUOTES, 'UTF-8');
}