<?php

namespace App\Http\Middleware;

use App\DataApiNew\Models\AgentApi;
use App\DataApiNew\Models\BlackList;
use Closure;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Redis;
use Symfony\Component\HttpFoundation\Response;
use Vinkla\Hashids\Facades\Hashids;

class LimitQps
{
    public $maxRequestsPerSecond = 10;
    /**
     * 处理请求。
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @return mixed
     */
    public function handle(Request $request, Closure $next)
    {
        $ip = $request->getClientIp();
        $maxRequestsPerSecond = $this->maxRequestsPerSecond;
        
        // 使用 Redis 存储每秒请求的计数，键的格式：qps:{IP}:{timestamp_second}
        $redisKey = 'qps:' . $ip . ':' . now()->timestamp;
        
        // Redis 的计数器操作：INCR命令返回自增后的值
        $requests = Redis::incr($redisKey);
    
        // 如果是第一次请求，设置过期时间为1秒
        if ($requests === 1) {
            Redis::expire($redisKey, 1);
        }
    
        // 判断当前秒内请求数是否超过限制
        if ($requests > $maxRequestsPerSecond) {
            BlackList::addIp($ip);
            return response()->json([
                'code' => 0,
                'msg' => '请求频繁'
            ], Response::HTTP_TOO_MANY_REQUESTS);
        }
    
        return $next($request);
    }
}