var DOCUSIGN_URL='xxx';
var DOCUSIGN_USER='xxx';
var DOCUSIGN_PASS='xxx';
var DOCUSIGN_KEY='xxx';

(function () {
    var apiClient = new docusign.ApiClient();
    apiClient.setBasePath(DOCUSIGN_URL);
    apiClient.addDefaultHeader('X-DocuSign-Authentication', JSON.stringify({
        Username: DOCUSIGN_USER,
        Password: DOCUSIGN_PASS,
        IntegratorKey: DOCUSIGN_KEY
    }));
    docusign.Configuration.default.setDefaultApiClient(apiClient);

    var loginData;

    async.waterfall([
        // Make sure login works.
        function (next) {
            var authenticationApi = new docusign.AuthenticationApi();
            var loginOps = new authenticationApi.LoginOptions();
            // loginOps.setApiPassword('true');
            loginOps.setIncludeAccountIdGuid('true');

            authenticationApi.login(loginOps, function (err, result, response) {
                // console.log(response.request.req._headers);
                // console.log(response.body);
                if (err) {
                    return next(err);
                }

                if (result) {
                    loginData = result.loginAccounts[0];
                    console.log(result);
                    return next();
                }

                next(new Error('Protocol Error'));
            });
        },
        // List templates
        function (next) {
            var templatesApi = new docusign.TemplatesApi();
            templatesApi.listTemplates(loginData.accountId, function (err, result, response) {
                if (err) {
                    return next(err);
                }

                if (result) {
                    console.log(result.envelopeTemplates);
                    return next(null, result.getEnvelopeTemplates());
                }

                next(new Error('Protocol Error'));
            });
        },
        // Get Document template
        function (templates, next) {
            var templatesApi = new docusign.TemplatesApi();
            if (templates.length == 0) {
                next(new Error('No templates found'));
            }
            var documentTemplate = templates[0];

            if (!documentTemplate) {
                return next(new Error('Template error'));
            }

            console.log(loginData.accountId, documentTemplate.templateId);
            templatesApi.get(loginData.accountId, documentTemplate.templateId, function (err, result, response) {
                if (err) {
                    return next(err);
                }

                if (result) {
                    console.log(result);
                    // return next(null, result.getEnvelopeTemplates());
                }

                // next(new Error('Protocol Error'));
            });

        }
    ], function (err, result) {
        if (err) {
            console.error('Failure:', err.stack);
        } else {
            console.log('Success');
        }
    })
}());