<?php

namespace App\Http\Middleware;

use App\Support\LadillLink;
use Closure;
use Illuminate\Http\Request;
use Symfony\Component\HttpFoundation\Response;

class RedirectLegacyQrToLadillLink
{
    /** @var list<string> */
    private const STORAGE_ASSET_SUFFIXES = [
        'event-logo',
        'event-cover',
        'itinerary-cover',
        'business-logo',
        'business-cover',
        'menu-logo',
        'menu-cover',
        'church-logo',
        'church-cover',
        'book-cover',
        'vcard-avatar',
        'app-icon',
        'file',
    ];

    public function handle(Request $request, Closure $next): Response
    {
        if (! preg_match('#^q/[a-z0-9]#i', ltrim($request->path(), '/'))) {
            return $next($request);
        }

        if (LadillLink::isInternalRequest($request)) {
            return $next($request);
        }

        // Same-origin AJAX from Events-hosted pages must not 307 to ladl.link
        // (cross-origin fetch has no CORS → checkout sheet never opens).
        if ($request->ajax() || $request->expectsJson() || $request->wantsJson()) {
            return $next($request);
        }

        if ($this->servesStoredAsset($request) || $this->servesRegistrationTransaction($request)) {
            return $next($request);
        }

        return LadillLink::legacyRedirect($request);
    }

    private function servesStoredAsset(Request $request): bool
    {
        $shortCode = $request->route('shortCode');
        if (! is_string($shortCode) || $shortCode === '') {
            return false;
        }

        $path = ltrim($request->path(), '/');
        $prefix = 'q/'.$shortCode.'/';
        if (! str_starts_with($path, $prefix)) {
            return false;
        }

        $suffix = substr($path, strlen($prefix));

        if (in_array($suffix, self::STORAGE_ASSET_SUFFIXES, true)) {
            return true;
        }

        return (bool) preg_match('#^(image/\d+|item-image/\d+/\d+)$#', $suffix);
    }

    private function servesRegistrationTransaction(Request $request): bool
    {
        $shortCode = $request->route('shortCode');
        if (! is_string($shortCode) || $shortCode === '') {
            return false;
        }

        $path = ltrim($request->path(), '/');
        $prefix = 'q/'.$shortCode.'/';
        if (! str_starts_with($path, $prefix)) {
            return false;
        }

        $suffix = substr($path, strlen($prefix));

        return $suffix === 'register'
            || str_starts_with($suffix, 'register/')
            || str_starts_with($suffix, 'registered/')
            || str_starts_with($suffix, 'speaker/');
    }
}