<?php
declare(strict_types=1);

namespace MageSail\Magesail\Plugin\FrontController;

use Magento\Framework\App\FrontController;
use Magento\Framework\App\RequestInterface;

/**
 * Run before Store RequestPreprocessor (sortOrder 10 < 50).
 * Ensure magesail_store is on the request from superglobals so base-URL redirect skip works
 * even if the Request object was built before query params were fully available.
 */
class EnsureTunnelParamPlugin
{
    private const QUERY_PARAM_STORE = 'magesail_store';
    private const SERVER_HEADER = 'HTTP_X_MAGESAIL_STORE_CODE';

    public function aroundDispatch(
        FrontController $subject,
        \Closure $proceed,
        RequestInterface $request
    ) {
        $this->ensureTunnelParamOnRequest($request);
        return $proceed($request);
    }

    /**
     * If tunnel indicator is in $_GET or REQUEST_URI or header, set it on the request
     * so later plugins (BaseUrlChecker, RequestPreprocessor skip) see it.
     */
    private function ensureTunnelParamOnRequest(RequestInterface $request): void
    {
        $value = $this->getTunnelStoreFromSuperglobals();
        if ($value === null) {
            return;
        }
        if (!$request instanceof \Magento\Framework\App\Request\Http) {
            return;
        }
        if ($request->getParam(self::QUERY_PARAM_STORE) !== null) {
            return;
        }
        $request->setParam(self::QUERY_PARAM_STORE, $value);
    }

    private function getTunnelStoreFromSuperglobals(): ?string
    {
        if (!empty($_GET[self::QUERY_PARAM_STORE])) {
            $v = trim((string) $_GET[self::QUERY_PARAM_STORE]);
            if ($v !== '') {
                return $v;
            }
        }
        $uri = $_SERVER['REQUEST_URI'] ?? '';
        if ($uri !== '' && str_contains($uri, self::QUERY_PARAM_STORE . '=')) {
            $query = str_contains($uri, '?') ? substr($uri, strpos($uri, '?') + 1) : '';
            parse_str($query, $params);
            $v = $params[self::QUERY_PARAM_STORE] ?? '';
            if ($v !== '' && trim((string) $v) !== '') {
                return trim((string) $v);
            }
        }
        $h = $_SERVER[self::SERVER_HEADER] ?? '';
        if ($h !== '' && trim((string) $h) !== '') {
            return trim((string) $h);
        }
        return null;
    }
}