(function() {
    try {
        if (window.Device) return;
        var jsonp = function (url, callback) {
            var callbackName = 'callback_' + new Date().getTime(),
                scriptElem = document.createElement('script'),
                headElem = document.getElementsByTagName('head')[0]
                    || document.documentElement;
            window[callbackName] = function (arg,s) {
                // delete window[callbackName];
                callback(arg,s);
            };
            scriptElem.src = url.replace(/=\?/, '=' + callbackName);
            headElem.insertBefore(scriptElem, headElem.firstChild);
        };
        var sessionId = '2452b277-b922-479b-81c0-6a49bea4fd6g';
        var urlPrefix = 'https://internal-api.feishu.cn/security/device/captcha/';
        var appId = 'suite_invite_join_tenant';
        var requestId = '';
        window.Device = {
            id:0,
            getDevice: function (callback, domain, uniq) {
                if (typeof callback !== 'function') {
                    throw 'getDevice arguments[1] must be a function';
                }
                domain = domain || '';
                u = 0;
                if (uniq){
                    u = 1
                }
                id = window.Device.id;
                window.Device.id =  (window.Device.id + 1) % Number.MAX_SAFE_INTEGER;
                jsonp(urlPrefix + 'challenge?callback=?&sessionId=' + sessionId + "&domain=" + domain + "&appId=" + appId+"&requestId="+requestId + "&u=" + u + "&id=" + id, function (answer,vsid) {
                    jsonp(urlPrefix + 'verify?callback=?&sessionId=' + vsid + '&answer=' + answer+"&requestId="+requestId, function (result) {
                        callback(result);
                    });
                });
            }
          
        }
    }catch (e) {

    };
})();