/**
    * Copyright 2005-2015 The Kuali Foundation
    *
    * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
    *
   * 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.
   */
  package org.kuali.rice.krad.web.login;
  
  import org.apache.commons.lang.StringUtils;
  import org.kuali.rice.core.api.config.property.ConfigContext;
  import org.kuali.rice.krad.UserSession;
  import org.kuali.rice.krad.util.GlobalVariables;
  import org.kuali.rice.krad.util.KRADConstants;
  import org.kuali.rice.krad.util.KRADUtils;
  import org.kuali.rice.krad.web.controller.UifControllerBase;
  import org.kuali.rice.krad.web.form.UifFormBase;
  import org.springframework.stereotype.Controller;
  import org.springframework.validation.BindingResult;
  import org.springframework.web.bind.annotation.ModelAttribute;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RequestMethod;
  import org.springframework.web.servlet.ModelAndView;
  
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import java.io.UnsupportedEncodingException;
  import java.net.URLDecoder;
  import java.util.Properties;
  
  /**
   * Basic controller KRAD dummy login.
   *
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  @Controller
  @RequestMapping(value = "/login")
  public class DummyLoginController extends UifControllerBase {
  
      @Override
      protected UifFormBase createInitialForm() {
          return new DummyLoginForm();
      }
  
      @RequestMapping(method = RequestMethod.POST, params = "methodToCall=submit")
      public ModelAndView submit(@ModelAttribute("KualiForm") DummyLoginForm uifForm, BindingResult result,
              HttpServletRequest request, HttpServletResponse response) {
          String returnUrl = decode(uifForm.getReturnLocation());
          if (StringUtils.isBlank(returnUrl)) {
              returnUrl = ConfigContext.getCurrentContextConfig().getProperty(KRADConstants.APPLICATION_URL_KEY);
          }
  
          Properties props = new Properties();
          String user = uifForm.getLogin_user();
          if (StringUtils.isNotBlank(user)) {
              props.put("__login_user", user);
          }
  
          String password = uifForm.getLogin_pw();
          if (StringUtils.isNotBlank(password)) {
              props.put("__login_pw", password);
          }
  
          return performRedirect(uifForm, returnUrl, props);
      }
  
      /**
       * Method to logout the backdoor user and return to the view.
       *
       * @return the view to return to
       */
      @RequestMapping(params = "methodToCall=backdoorLogout")
      public ModelAndView backdoorLogout(@ModelAttribute("KualiForm") DummyLoginForm uifForm, BindingResult result,
              HttpServletRequest request, HttpServletResponse response) {
          String returnUrl = decode(uifForm.getReturnLocation());
  
          if (StringUtils.isBlank(returnUrl)) {
              returnUrl = ConfigContext.getCurrentContextConfig().getProperty(KRADConstants.APPLICATION_URL_KEY);
          }
  
          UserSession userSession = KRADUtils.getUserSessionFromRequest(request);
          if (userSession.isBackdoorInUse()) {
              userSession.clearBackdoorUser();
          }
  
          return performRedirect(uifForm, returnUrl, new Properties());
      }
  
      @RequestMapping(params = "methodToCall=logout")
      public ModelAndView logout(@ModelAttribute("KualiForm") UifFormBase form, HttpServletRequest request,
              HttpServletResponse response) {
         UserSession userSession = GlobalVariables.getUserSession();
 
         if (userSession.isBackdoorInUse()) {
             userSession.clearBackdoorUser();
         }
 
         request.getSession().invalidate();
         return returnToHub(form);
     }
 
     private String decode(String encodedUrl) {
         try {
             if (StringUtils.isNotBlank(encodedUrl)) {
                 return URLDecoder.decode(encodedUrl, "UTF-8");
             }
         } catch (UnsupportedEncodingException e) {
             throw new RuntimeException("Unable to decode value: " + encodedUrl, e);
         }
 
         return null;
     }
 
 }