<%
/*
 * Copyright (c) 2016, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
 *
 * WSO2 Inc. licenses this file to you under the Apache License,
 * Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

require("/lib/error-pages-router.js");

(function () {
    var log = new Log("auth-module-login");
    var authModule = require("/lib/modules/auth/auth.js").module;

    if (!authModule.isEnabled()) {
        log.warn("Auth module is not enabled in the application configuration file.");
        response.sendError(404);
        return;
    }

    var currentUser = authModule.getCurrentUser();
    if (currentUser) {
        if (log.isDebugEnabled()) {
            log.debug("User '" + currentUser.username + "' is already logged in.");
        }
        var referer = request.getHeader("referer");
        var redirectUrl = (referer) ? referer : (authModule.getAppContext() + "/");
        response.sendRedirect(redirectUrl);
        return;
    }

    if (authModule.isSsoEnabled()) {
        // SSO is enabled.
        authModule.renderSsoIntermediatePage("login", response);
    } else {
        // Generic login process is enabled.
        authModule.login(request, response);
    }
})();
%>