<?php

declare(strict_types=1);

namespace MageSail\Magesail\Model;

use Magento\Framework\App\DeploymentConfig;
use Magento\Framework\App\Request\Http;

/**
 * Detects Magento admin URL path so tunnel store scope is not applied to backend requests.
 */
class AdminPathDetector
{
    public function __construct(
        private readonly DeploymentConfig $deploymentConfig
    ) {
    }

    public function getConfiguredAdminFrontName(): string
    {
        return (string) $this->deploymentConfig->get('backend/frontName', 'admin');
    }

    /**
     * True when the request path contains the configured admin front name as a segment (any position),
     * after skipping empty, index.php, and pub segments.
     */
    public function isAdminPath(Http $request): bool
    {
        return $this->getAdminFrontNameIfPresentInPath($request) !== null;
    }

    public function getAdminFrontNameIfPresentInPath(Http $request): ?string
    {
        $path = trim((string) $request->getPathInfo(), '/');
        if ($path === '') {
            $uriPath = parse_url((string) $request->getRequestUri(), PHP_URL_PATH);
            $path = trim((string) $uriPath, '/');
        }
        if ($path === '') {
            return null;
        }
        $adminFront = $this->getConfiguredAdminFrontName();
        foreach (explode('/', $path) as $segment) {
            $lower = strtolower($segment);
            if ($lower === '' || $lower === 'index.php' || $lower === 'pub') {
                continue;
            }
            if (strcasecmp($segment, $adminFront) === 0) {
                return $adminFront;
            }
        }
        return null;
    }
}