<?php

namespace App\Http\Middleware;

use App\Http\Responses\ProblemResponse;
use Closure;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\RateLimiter;
use Symfony\Component\HttpFoundation\Response;

/**
 * Per-IP rate limit for the public demo endpoints. Default: 50 ops / hour.
 */
class DemoRateLimit
{
    public function handle(Request $request, Closure $next): Response
    {
        $limit = (int) config('switchyard.demo.rate_limit_per_hour', 50);
        $key = 'demo:'.($request->ip() ?? 'anon');

        if (RateLimiter::tooManyAttempts($key, $limit)) {
            $retryAfter = RateLimiter::availableIn($key);

            return new ProblemResponse(
                status: 429,
                title: 'Too many requests',
                detail: "Demo rate limit of {$limit} requests per hour exceeded. Retry in {$retryAfter} seconds.",
            );
        }

        RateLimiter::hit($key, 3600);

        return $next($request);
    }
}