<?php


define("TOKEN", "kingsome");
define("MSG_KEY", 'MzebhFcmcIFT85xOr5TnrDVeLx5HMbpgAl5gw2PVvhX');
define("SHAOWEI_APPID", 'wxfa9c8ea6a55f00d0');
define("PRIVATE_KEY", '999712592d00ad2f75b04421e030ba04');


class KefuController {


    public function checkServer()       // 校验服务器地址URL
    {
        if ( isset($_GET['echostr'])) {
            $this->valid();
        } else {
            $this->responseMsg();
        }
    }

    public function valid()
    {
        $echoStr = $_GET['echostr'];
        if ( $this->checkSignature()){
            echo $echoStr;
            exit;
        } else {
            echo $echoStr . '+++' . TOKEN;
            exit;
        }
    }

    private function checkSignature()
    {

        $signature = $_GET["signature"];
        $timestamp = $_GET["timestamp"];
        $nonce = $_GET["nonce"];

        $token = TOKEN;
        error_log('token:' . $token);
        $tmpArr = array ( $token , $timestamp , $nonce );
        sort( $tmpArr , SORT_STRING);
        $tmpStr = implode( $tmpArr );
        $tmpStr = sha1($tmpStr);
        error_log('tmpStr:' . $tmpStr);
        error_log('signature:' . $signature);

        if ( $tmpStr == $signature ){
            return  true ;
        } else {
            return  false ;
        }
    }

    public function responseMsg()
    {
        $postStr = $GLOBALS ["HTTP_RAW_POST_DATA" ];

        if (! empty ( $postStr ) && is_string ( $postStr )){

            $postArr = json_decode( $postStr , true );
            if (! empty ( $postArr ['MsgType']) && $postArr ['MsgType'] == 'text'){    // 文本消息
                $fromUsername = $postArr ['FromUserName'];    // 发送者openid
                $toUserName = $postArr ['ToUserName'];        // 小程序id
                $textTpl = array (
                    "ToUserName" =>$fromUsername ,
                    "FromUserName"=> $toUserName ,
                    "CreateTime"=> time (),
                    "MsgType"=>"transfer_customer_service",
                );
                exit (json_encode( $textTpl ));
            } elseif (! empty ( $postArr ['MsgType']) && $postArr ['MsgType'] == 'image'){ // 图文消息
                $fromUsername = $postArr ['FromUserName'];    // 发送者openid
                $toUserName = $postArr ['ToUserName'];        // 小程序id
                $textTpl = array (
                    "ToUserName"=> $fromUsername ,
                    "FromUserName"=> $toUserName ,
                    "CreateTime"=> time (),
                    "MsgType"=>"transfer_customer_service",
                );
                exit (json_encode( $textTpl ));
            } elseif ( $postArr ['MsgType'] == 'event' && $postArr ['Event']=='user_enter_tempsession'){ // 进入客服动作
                $fromUsername = $postArr ['FromUserName'];    // 发送者openid
                $content = '您好，有什么能帮助你?' ;
                $data = array (
                    "touser"=> $fromUsername ,
                    "msgtype"=>"text",
                    "text"=> array ("content"=> $content )
                );
                $json = json_encode( $data ,JSON_UNESCAPED_UNICODE);   // php5.4+

                $access_token = $this->getAccessToken();
                /*
                 * POST发送https请求客服接口api
                 */
                $url = " https :// api . weixin . qq . com / cgi - bin / message / custom / send ? access _ token = ". $access_token ;


                // 以'json'格式发送post的https请求
                $curl = curl_init();
                curl_setopt( $curl , CURLOPT_URL, $url );
                curl_setopt( $curl , CURLOPT_POST, 1); // 发送一个常规的Post请求
                curl_setopt( $curl , CURLOPT_SSL_VERIFYPEER, FALSE );
                curl_setopt( $curl , CURLOPT_SSL_VERIFYHOST, FALSE );
                if (! empty ( $json )){
                    curl_setopt( $curl , CURLOPT_POSTFIELDS, $json );
                }
                curl_setopt( $curl , CURLOPT_RETURNTRANSFER, 1 );
                // curl_setopt($curl, CURLOPT_HTTPHEADER, $headers );
                $output = curl_exec( $curl );
                if (curl_errno( $curl )) {
                    echo 'Errno'.curl_error( $curl ); // 捕抓异常
                }
                curl_close( $curl );
                if ( $output == 0 ){
                    echo 'success'; exit ;
                }

            } else {
                exit ('aaa' );
            }
        } else {
            echo "" ;
            exit ;
        }
    }

    /* 调用微信api，获取access_token，有效期7200s -xzz0704 */
    public function getAccessToken(){
        /* 在有效期，直接返回access_token */
        if (S('access_token' )){
            return S('access_token' );
        }
        /* 不在有效期，重新发送请求，获取access_token */
        else {
            $appid = SHAOWEI_APPID;
            $appkey = PRIVATE_KEY;
            $url = "https://api.weixing.qq.com/cgi-bin/token?;grant_type=client_credential&appid=$appid&secret=$appkey";
            $response = '';
            if (!phpcommon\HttpClient::get($url, $params, $response)) {
                phpcommon\sendError(ERR_RETRY, '系统繁忙');
                return;
            }

            $res = json_decode($response, true );
            if ( $res ){
                S( 'access_token', $res ['access_token'],7100 );
                return S('access_token' );
            } else {
                return 'api return error' ;
            }
        }
    }

}