<?php
namespace addons\csmadmin\library;

use think\Cache;
use fast\Http;

class WxUtils
{

    public static function getAccessToken()
    {
        $config = get_addon_config(CsmContants::$ADDONS);
        if($config['wxappid']==null||$config['wxappid']==''){
            CsmUtils::error("微信配置没有维护!");
        }
        $key = 'csmwx_wx_accesstoken_'.$config['wxappid'].$config['wxappsecret'];
        $token = Cache::get($key);
        // if (!$token) {
        if ($token==null || $token=='') {
            
            $params = [
                'grant_type' => 'client_credential',
                'appid' => $config['wxappid'],
                'secret' => $config['wxappsecret']
            ];
            $url = "https://api.weixin.qq.com/cgi-bin/token";
            $result = Http::sendRequest($url, $params, 'GET');
            trace($result);
            if ($result['ret']) {
                $msg = (array) json_decode($result['msg'], true);
                if (isset($msg['access_token'])) {
                    $token = $msg['access_token'];
                    Cache::set($key, $token, $msg['expires_in'] - 1);
                }
            }
        }
        return $token;
    }

    public static function qrcodeCreate($sceneId)
    {
        $token = static::getAccessToken();
        $params = [
            'expire_seconds' => 86400, // 3600*24
            'action_name' => 'QR_SCENE',
            'action_info' => [
                'scene' => [
                    'scene_id' => $sceneId
                ]
            ]
        ];
        $url = "https://api.weixin.qq.com/cgi-bin/qrcode/create?access_token=" . $token;
        $result = Http::sendRequest($url, json_encode($params));
        if ($result['ret']) {
            $msg = (array) json_decode($result['msg'], true);
            if (isset($msg['ticket'])) {
                $ticket = $msg['ticket'];
                return 'https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=' . urlencode($ticket);
            }
        } else {
            return null;
        }
    }

    /**
     * 微信回调
     */
    public static function wxcallback($request)
    {
        trace("==sendWxCodeAjax==");
        $signature = $request->request('signature');
        $timestamp = $request->request('timestamp');
        $nonce = $request->request('nonce');
        $echostr = $request->request('echostr');
        echo $echostr; // 微信了微信地址认证用

        $config = get_addon_config(CsmContants::$ADDONS);
        $token = $config['wxtoken'];

        $tmpArr = array(
            $token,
            $timestamp,
            $nonce
        );
        sort($tmpArr, SORT_STRING);
        $tmpStr = implode($tmpArr);
        $tmpStr = sha1($tmpStr);

        if ($tmpStr == $signature) {
            trace("==sendWxCodeAjax.ok==");
            $content = file_get_contents('php://input');
            trace("sendWxCodeAjax.content=" . $content);
            if($content==null||$content==''){
                //如果未空,则是认为校验接口
                //trace("echostr=".$echostr);
                //echo $echostr;
                return;
            }
            $postObj = simplexml_load_string($content, 'SimpleXMLElement', LIBXML_NOCDATA);
            $openid = $postObj->FromUserName; // openid
            $event = strtolower($postObj->Event);
            $eventKey = $postObj->EventKey;

            $wxuser = WxUtils::getInfoByOpenID($openid);
            trace('befor:'.$eventKey);
            $eventKey = (int)str_replace("qrscene_", "", $eventKey);
            trace('after:'.$eventKey);
            return [
                "eventKey" => $eventKey,
                "openid" => $openid,
                "event" => $event,
                'wxuser' => $wxuser
            ];
        } else {
            return null;
        }
    }

    /**
     * 根据openid获取用户在微信的详细信息
     * 参考文档:https://developers.weixin.qq.com/doc/offiaccount/User_Management/Get_users_basic_information_UnionID.html#UinonId
     * 返回
     * 'ret' => boolean true
     * 'msg' => string '{"subscribe":1,"openid":"oB_aRt-Jp4QAPHzin_34LBOMhybE","nickname":"陈士明","sex":1,"language":"zh_CN","city":"浦东新区","province":"上海","country":"中国","headimgurl":"http:\/\/thirdwx.qlogo.cn\/mmopen\/wVRnW5uIXI1ibqkp0xtaicZaY25Po07JDHbTZPUickxTCX4HibvvQ6picEPSVPNKIz6gxA80MOsrM5UxQdtX0YMicHTdQ0ibULGX2Tl\/132","subscribe_time":1586088907,"remark":"","groupid":0,"tagid_list":[],"subscribe_scene":"ADD_SCENE_QR_CODE","qr_scene":1586088886,"qr_scene_str":""}' (length=471)
     */
    public static function getInfoByOpenID($userid)
    {
        $token = static::getAccessToken();
        $params = [];
        $url = "https://api.weixin.qq.com/cgi-bin/user/info?access_token=" . $token . '&openid=' . $userid;
        $result = Http::sendRequest($url, json_encode($params));
        if ($result['msg'] != null) {
            return json_decode($result['msg'], true);
        } else {
            return null;
        }
        
    }
    
}