/**
    * Copyright 2005-2013 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.kcb.web.spring;
  
  import org.apache.log4j.Logger;
  import org.kuali.rice.kcb.bo.RecipientDelivererConfig;
  import org.kuali.rice.kcb.deliverer.MessageDeliverer;
  import org.kuali.rice.kcb.exception.ErrorList;
  import org.kuali.rice.kcb.service.KENIntegrationService;
  import org.kuali.rice.kcb.service.MessageDelivererRegistryService;
  import org.kuali.rice.kcb.service.RecipientPreferenceService;
  import org.springframework.beans.factory.annotation.Required;
  import org.springframework.web.servlet.ModelAndView;
  import org.springframework.web.servlet.mvc.multiaction.MultiActionController;
  
  import javax.servlet.ServletException;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.HashMap;
  import java.util.Map;
  
  /**
   * This class is the controller that handles management of various user preferences interfaces (deliver types, user subscriptions, etc).
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  public class UserPreferencesController extends MultiActionController {
      /** Logger for this class and subclasses */
      private static final Logger LOG = Logger.getLogger(UserPreferencesController.class);
  
      private static final String VIEW = "DelivererPreferences";
      private static final String KEW_CHANNEL = "KEW"; 
      protected RecipientPreferenceService recipientPreferenceService;
      protected MessageDelivererRegistryService messageDelivererRegistryService;
      protected KENIntegrationService kenIntegrationService;
  
      /**
       * Set the RecipientPreferenceService
       * @param recipientPreferenceService
       */
      @Required
      public void setRecipientPreferenceService(RecipientPreferenceService userPreferenceService) {
          this.recipientPreferenceService = userPreferenceService;
      }
  
      /**
       * Set the MessageDelivererRegistryService
       * @param messageDelivererRegistryService
       */
      @Required
      public void setMessageDelivererRegistryService(MessageDelivererRegistryService messageDelivererRegistryService) {
          this.messageDelivererRegistryService = messageDelivererRegistryService;
      }
  
      /**
       * Sets the KENIntegrationService
       * @param kis the KENIntegrationService
       */
      @Required
      public void setKenIntegrationService(KENIntegrationService kis) {
          this.kenIntegrationService = kis;
      }
  
      /**
       * @return all channels for Rice, including the builtin KEW action list "channel"
       */
      protected Collection<String> getAllChannels() {
          // TODO: does not traverse bus yet
          Collection<String> allChannels = new ArrayList<String>();
          //allChannels.add(KEW_CHANNEL);
          allChannels.addAll(kenIntegrationService.getAllChannelNames());
          return allChannels;
      }
  
      /**
       * displayDelivererConfigurationForm - obtain information necessary
       * for displaying all possible Deliverer types and forward to the form
       * @param request
       * @param response
       * @return
       * @throws ServletException
       * @throws IOException
       */
      public ModelAndView displayDelivererConfigurationForm(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
         String userid = request.getRemoteUser();
         LOG.debug("remoteUser: "+userid); 
 
         // Get DeliveryType classes
         Collection<MessageDeliverer> deliveryTypes = this.messageDelivererRegistryService.getAllDeliverers();
 
         // get all channels       
         Collection<String> channels = getAllChannels();
 
         //     get all user preferences in a HashMap
         HashMap<String, String> preferences  = this.recipientPreferenceService.getRecipientPreferences(userid);
 
         // get existing configured deliverers
         Collection<RecipientDelivererConfig> currentDeliverers = this.recipientPreferenceService.getDeliverersForRecipient(userid);
         // create a Map as an easy way for the JSP to determine whether a deliver is enabled for channels
         Map<String, Boolean> currentDeliverersMap = new HashMap<String, Boolean>();
         for (RecipientDelivererConfig udc: currentDeliverers) {
             String channelName = udc.getChannel();
             currentDeliverersMap.put(udc.getDelivererName() + "." + channelName, Boolean.TRUE);
         }
 
         Map<String, Object> model = new HashMap<String, Object>();
         model.put("channels", channels);
         model.put("deliveryTypes", deliveryTypes);
         model.put("preferences", preferences);
         model.put("currentDeliverersMap", currentDeliverersMap);
         return new ModelAndView(VIEW, model);
     }
 
     /**
      * saveDelivererConfiguration - save deliverer configuration data
      * @param request
      * @param response
      * @return
      * @throws ServletException
      * @throws IOException
      */
     public ModelAndView saveDelivererConfiguration(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
         String userid = request.getRemoteUser();
         LOG.debug("remoteUser: "+userid);
         boolean error = false;
 
         Map<String, Object> model = new HashMap<String, Object>();
 
         // create preferences map here so that we can pass them all back to the view
         HashMap<String, String> preferences  = new HashMap<String, String>();
 
         // Get DeliveryType classes.  loop through each deliverer type to 
         // to obtain preferenceKeys.  Check to see if a matching request
         // parameter was provided, then save a record for the userID, channelID, and 
         // preferences setting
         Collection<MessageDeliverer> deliveryTypes = this.messageDelivererRegistryService.getAllDeliverers();
 
         // first remove all configured user delivers for this user
         this.recipientPreferenceService.removeRecipientDelivererConfigs(userid);        
 
         for (MessageDeliverer dt: deliveryTypes) {
             String deliveryTypeName = dt.getName();
             HashMap<String,String> prefMap = dt.getPreferenceKeys();
             LOG.debug("deliveryName: "+deliveryTypeName);
             HashMap<String, String> userprefs = new HashMap<String, String>();
             for (String prefKey:prefMap.keySet()) {
                 LOG.debug("   key: "+prefKey+", value: "+request.getParameter(deliveryTypeName+"."+prefKey));
                 userprefs.put(deliveryTypeName+"."+prefKey, request.getParameter(deliveryTypeName+"."+prefKey ));
                 preferences.put(deliveryTypeName+"."+prefKey, request.getParameter(deliveryTypeName+"."+prefKey ));
             }
             try {
                 this.recipientPreferenceService.saveRecipientPreferences(userid, userprefs, dt);
             } catch (ErrorList errorlist) {
                 error = true;
                 model.put("errorList", errorlist.getErrors()) ;
             }
 
             // get channelName.channels
             String[] channels = request.getParameterValues(deliveryTypeName+".channels");
             if (channels != null && channels.length > 0) {
                 for (int j=0; j < channels.length; j++) {
                     LOG.debug(deliveryTypeName+".channels["+j+"] "+channels[j]);   
                 }
             }
             //	 now save the userid, channel selection
             this.recipientPreferenceService.saveRecipientDelivererConfig(userid, deliveryTypeName, channels);
         }
 
         // get all channels       
         Collection<String> channels = getAllChannels();
 
         // get existing configured deliverers
         Collection<RecipientDelivererConfig> currentDeliverers = this.recipientPreferenceService.getDeliverersForRecipient(userid);
         Map<String, Object> currentDeliverersMap = new HashMap<String, Object>();
         for (RecipientDelivererConfig udc: currentDeliverers) {
             String channelId = udc.getChannel();
             currentDeliverersMap.put(udc.getDelivererName()+"."+channelId, Boolean.TRUE);
         }
 
         // use for debugging, uncomment for production
         //LOG.info("CurrentDeliverersMap");
         //Iterator iter = currentDeliverersMap.keySet().iterator();
         //while (iter.hasNext()) {
         //   Object o = iter.next();	   
         //   LOG.info("key: "+o.toString()+", value: "+ currentDeliverersMap.get(o) );
         //}
 
         model.put("channels", channels);
         model.put("deliveryTypes", deliveryTypes);
         model.put("preferences", preferences);
         model.put("currentDeliverersMap", currentDeliverersMap);
         model.put("message", "Update Successful");
 
         return new ModelAndView(VIEW, model);
     }
 }