/*
    * Copyright 2005-2007 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.kns.web.struts.action;
  
  import org.apache.commons.lang.StringUtils;
  import org.apache.struts.action.ActionForm;
  import org.apache.struts.action.ActionForward;
  import org.apache.struts.action.ActionMapping;
  import org.kuali.rice.core.util.RiceConstants;
  import org.kuali.rice.kns.web.struts.form.QuestionPromptForm;
  import org.kuali.rice.krad.exception.AuthorizationException;
  import org.kuali.rice.krad.util.GlobalVariables;
  import org.kuali.rice.krad.util.KRADConstants;
  import org.kuali.rice.krad.util.UrlFactory;
  
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import java.util.Properties;
  
  /**
   * This class handles Actions for QuestionPromp.
   *
   *
   */
  public class QuestionPromptAction extends KualiAction {
  	
      /**
  	 * This overridden method ...
  	 * 
  	 * @see org.kuali.rice.krad.web.struts.action.KualiAction#checkAuthorization(org.apache.struts.action.ActionForm, java.lang.String)
  	 */
  	@Override
  	protected void checkAuthorization(ActionForm form, String methodToCall)
  			throws AuthorizationException {
  		// no authorization required
  	}
  
  	/**
       * This method is the entry point action for the question prompt component.
       *
       * @param mapping
       * @param form
       * @param request
       * @param response
       * @return ActionForward
       * @throws Exception
       */
      public ActionForward start(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {
          // deal with the fact that some requests might be reposts from errors on the reason field
          processErrorMessages(request);
  
          return mapping.findForward(RiceConstants.MAPPING_BASIC);
      }
  
      /**
       * This method handles gathering all input and passing control back to the caller action.
       *
       * @param mapping
       * @param form
       * @param request
       * @param response
       * @return ActionForward
       * @throws Exception
       */
      public ActionForward processAnswer(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {
          QuestionPromptForm questionPromptForm = (QuestionPromptForm) form;
  
          Properties parameters = new Properties();
  
          parameters.put(KRADConstants.DOC_FORM_KEY, questionPromptForm.getFormKey());
          parameters.put(KRADConstants.QUESTION_CLICKED_BUTTON, getSelectedButton(request));
          parameters.put(KRADConstants.METHOD_TO_CALL_ATTRIBUTE, questionPromptForm.getCaller());
          parameters.put(KRADConstants.REFRESH_CALLER, KRADConstants.QUESTION_REFRESH);
          parameters.put(KRADConstants.QUESTION_INST_ATTRIBUTE_NAME, questionPromptForm.getQuestionIndex());
          if(questionPromptForm.getDocNum() != null){
          	parameters.put(KRADConstants.DOC_NUM, questionPromptForm.getDocNum());
          }
          
          if (StringUtils.isNotBlank(questionPromptForm.getQuestionAnchor())) {
              parameters.put(KRADConstants.ANCHOR, questionPromptForm.getQuestionAnchor());
          }
  
          String context = questionPromptForm.getContext();
          if (StringUtils.isNotBlank(context)) {
              parameters.put(KRADConstants.QUESTION_CONTEXT, context);
         }
         String reason = questionPromptForm.getReason();
         if (StringUtils.isNotBlank(reason)) {
             parameters.put(KRADConstants.QUESTION_REASON_ATTRIBUTE_NAME, reason);
         }
         if (StringUtils.isNotBlank(questionPromptForm.getMethodToCallPath())) {
             // For header tab navigation. Leaving it blank will just kick user back to page.
             parameters.put(questionPromptForm.getMethodToCallPath(), "present");
         }
 
         String returnUrl = UrlFactory.parameterizeUrl(questionPromptForm.getBackLocation(), parameters);
 
         return new ActionForward(returnUrl, true);
     }
 
     /**
      * Parses the method to call attribute to pick off the button number that was pressed.
      *
      * @param request
      * @return int
      */
     private String getSelectedButton(HttpServletRequest request) {
         String selectedButton = "-1";
         String parameterName = (String) request.getAttribute(KRADConstants.METHOD_TO_CALL_ATTRIBUTE);
         if (StringUtils.isNotBlank(parameterName)) {
             selectedButton = StringUtils.substringBetween(parameterName, ".button", ".");
         }
 
         return selectedButton;
     }
 
     /**
      * This method handles processing any error messages coming in the door.
      *
      * @param request
      */
     private void processErrorMessages(HttpServletRequest request) {
         String errorKey = request.getParameter(KRADConstants.QUESTION_ERROR_KEY);
         String errorPropertyName = request.getParameter(KRADConstants.QUESTION_ERROR_PROPERTY_NAME);
         String errorParameter = request.getParameter(KRADConstants.QUESTION_ERROR_PARAMETER);
 
         if (StringUtils.isNotBlank(errorKey)) {
             if (StringUtils.isBlank(errorPropertyName)) {
                 throw new IllegalStateException("Both the errorKey and the errorPropertyName must be filled in, " + "in order for errors to be displayed by the question component.  Currently, " + "only the errorKey has a value specified.");
             }
             else {
                 if (StringUtils.isBlank(errorParameter)) {
                     GlobalVariables.getMessageMap().putErrorWithoutFullErrorPath(errorPropertyName, errorKey);
                 }
                 else {
                     GlobalVariables.getMessageMap().putErrorWithoutFullErrorPath(errorPropertyName, errorKey, errorParameter);
                 }
             }
         }
     }
 }