<?php
/**
 * Created by PhpStorm.
 * User: Bear
 * Date: 2019/11/13
 * Time: 下午2:52
 */

namespace app\main\service;
use app\common\library\Redis;
use app\main\constants\ErrorCodeConstants;
use think\Config;
use think\Request;


/**
 * 访问限制
 * Class VisitLimitService
 * @package app\main\service
 */
class VisitLimitService extends BaseService
{
    /**
     * @var VisitLimitService
     */
    protected static $self = NULL;

    public static function instance()
    {
        if (self::$self == NULL) {
            self::$self = new self();
        }
        return self::$self;
    }

    /**
     * @param $limit
     * @param array ...$values
     * @return \app\main\model\object\ReturnObject
     */
    public function visitLimit($limit, ...$values)
    {
        $keys[] = date('i');
        if (Request::instance()->isAjax()) {
            $keys[] = 'AJAX';
        }
        foreach ($values as $item) {
            if ($item) {
                $keys[] = $item;
            }
        }
        $cacheKey = 'VISIT:' . implode(':', $keys);
        LogService::debug($cacheKey);
        $value = Redis::instance()->incrBy($cacheKey, 1);
        Redis::instance()->expire($cacheKey, 60);
        if ($value >= $limit) {
            $this->setCode(ErrorCodeConstants::VISIT_EXCEED)->setMsg('访问过于频繁，请稍后再试');
            if ($value == $limit) {
                LogService::info('EXCEED:limit:' . $cacheKey . ':' . $value . '>=' . $limit);
            } else {
                LogService::info('EXCEED:cache:' . $cacheKey . ':' . $value . '>=' . $limit);
            }
        } else {
            LogService::debug('NORMAL:cache:' . $cacheKey . ':' . $value . '<' . $limit);
        }
        return $this->getReturn();
    }

    /**
     * @param $admin_id
     * @param $uri
     * @return \app\main\model\object\ReturnObject
     */
    public function visitAdminUri($admin_id, $uri)
    {
        $adminUriLimit = Config::get('site.adminurilimit');
        if (!$adminUriLimit) {
            $adminUriLimit = 200;
        }
        return $this->visitLimit($adminUriLimit, $admin_id, $uri);
    }

    /**
     * @param $ip
     * @param $uri
     * @return \app\main\model\object\ReturnObject
     */
    public function visitIpUri($ip, $uri)
    {
        $ipUriLimit = Config::get('site.ipurilimit');
        if (!$ipUriLimit) {
            $ipUriLimit = 200;
        }
        return $this->visitLimit($ipUriLimit, $ip, $uri);
    }

    public function checkMigratedV2()
    {
        return false;
    }

    public function checkMigrated()
    {
	    return false;
    }
}