<?php
namespace App\Service;

use Green\Request\V20170112 as Green;

class DetectionService
{
    /**
     * Get the acs client
     * @return \DefaultAcsClient
     */
    private function getClient()
    {
        date_default_timezone_set("PRC");
        $iClientProfile = \DefaultProfile::getProfile("cn-shanghai", config('aliyun.access_key'), config('aliyun.access_secret'));

        \DefaultProfile::addEndpoint("cn-shanghai", "cn-shanghai", "Green", "green.cn-shanghai.aliyuncs.com");

        $client = new \DefaultAcsClient($iClientProfile);

        return $client;
    }

    /**
     * scene 风险场景，和传递进来的场景对应
     * suggestion 建议用户处理，取值范围：[“pass”, “review”, “block”], pass:图片正常，review：需要人工审核，block：图片违规，
     *            可以直接删除或者做限制处理
     * label 文本的分类
     * rate 浮点数，结果为该分类的概率；值越高，越趋于该分类；取值为[0.00-100.00]
     * extras map，可选，附加信息. 该值将来可能会调整，建议不要在业务上进行依赖
     *
     *  -10000  检测数据有问题
     *  10000  检测数据正常
     *  20000  检测出异常 重试三次
     * @param $request
     */
    private function processResponse($request)
    {
        $client = $this->getClient();
        try {
            $response = $client->getAcsResponse($request);

            if(200 == $response->code){
                $taskResults = $response->data;
                $detail = [];
                $flag = true;
                foreach ($taskResults as $taskResult) {
                    if(200 == $taskResult->code){
                        $this->processSceneResult($taskResult, $flag);
                    }else{
                        return $this->echoStr(-2000, 'task process fail:'.$response->code);
                    }
                    if (isset($taskResult->filteredContent)) {
                        array_push($detail, $taskResult->filteredContent);
                    }
                }
                if($flag == false){
                    return $this->echoStr(-10000, 'the scene is not normal', $detail);
                }else{
                    return $this->echoStr(10000, 'the scene is normal');
                }
            }else{
                return $this->echoStr(-2000, 'detect not success. code:'.$response->code);
            }
        } catch (Exception $e) {
            return $this->echoStr(-2000, $e);
        }
    }

    /**
     * @param $code
     * @param $msg
     */
    private function echoStr($code, $msg, $detail = []){
        return array(
            'code' => $code,
            'msg' => $msg,
            'detail' => $detail
        );
    }

    /**
     * @param $taskResult
     */
    private function processSceneResult($taskResult, &$flag){
        $sceneResults = $taskResult->results;
        foreach ($sceneResults as $sceneResult) {
            //根据scene和suggetion做相关的处理
            $suggestion = $sceneResult->suggestion;
            $rate = $sceneResult->rate;
            if($suggestion!='pass' && $rate>80){
                $flag = false;
            }
        }
    }

    /**
     * 文本垃圾检测
     * scenes字符串数组：
     *   关键词识别scene场景取值keyword
     *        分类label:正常normal 含垃圾信息spam 含广告ad 涉政politics 暴恐terrorism 色情porn 辱骂abuse
     *                  灌水flood 命中自定义customized(阿里后台自定义)
     *   垃圾检测识别场景scene取值antispam
     *        分类label:正常normal 含违规信息spam 含广告ad 涉政politics 暴恐terrorism 色情porn 违禁contraband
     *                  命中自定义customized(阿里后台自定义)
     *
     * tasks json数组 ，最多支持100个task即100段文本
     * content 待检测文本，最长4000个字符
     *
     * @param $text 支持字符串和数组
     * @return null
     */
    public function checkText($text){
        if(empty($text)){
            return null;
        }
        $request = new Green\TextScanRequest();
        $request->setMethod("POST");
        $request->setAcceptFormat("JSON");
        if(is_array($text)){
            $taskArr = [];
            foreach($text as $k => $v){
                $task = 'task'.$k;
                $$task = array('dataId' =>  md5(uniqid($task)),
                    'content' => $v,
                    'category' => 'post',
                    'time' => round(microtime(true)*1000)
                );
                array_push($taskArr, $$task);
            }
            $request->setContent(json_encode(array("tasks" => $taskArr,
                "scenes" => array("antispam"))));
        }else if(is_string($text)){
            $task1 = array('dataId' =>  md5(uniqid()),
                'content' => $text
            );
            $request->setContent(json_encode(array("tasks" => array($task1),
                "scenes" => array("antispam"))));
        }
        return $this->processResponse($request);
    }
    /**
     * 图片检测
     * scenes字符串数组：
     *   图片广告识别scene场景取值ad
     *        分类label: 正常normal 含广告ad
     *   图片鉴黄识别场景scene取值porn
     *        分类label:正常normal 性感sexy 色情porn
     *   图片暴恐涉政识别场景scene取值terrorism
     *        分类label:正常normal terrorism含暴恐图片 outfit特殊装束 logo特殊标识 weapon武器 politics渉政 others	其它暴恐渉政
     *
     * tasks json数组 ，最多支持100个task即100张图片
     *
     * @param $img 支持字符串和数组
     * @return null
     */
    public function checkImg($img){
        if(empty($img)){
            return null;
        }
        $request = new Green\ImageSyncScanRequest();
        $request->setMethod("POST");
        $request->setAcceptFormat("JSON");
        if(is_array($img)){
            $taskArr = array();
            foreach($img as $k => $v){
                $task = 'task'.$k;
                $$task = array('dataId' =>  md5(uniqid($task)),
                    'url' => $v,
                    'time' => round(microtime(true)*1000)
                );
                array_push($taskArr, $$task);
            }
            $request->setContent(json_encode(array("tasks" => $taskArr,
                "scenes" => array("ad", "porn", "terrorism"))));
        }else if(is_string($img)){
            $task1 = array('dataId' =>  md5(uniqid()),
                'url' => $img,
                'time' => round(microtime(true)*1000)
            );
            $request->setContent(json_encode(array("tasks" => array($task1),
                "scenes" => array("ad", "porn", "terrorism"))));
        }
        return $this->processResponse($request);
    }


}