/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF 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.
   */
  package org.apache.myfaces.custom.conversation;
  
  import org.apache.myfaces.shared_tomahawk.util.StringUtils;
  
  import javax.faces.component.UICommand;
  import javax.faces.context.FacesContext;
  import javax.faces.el.MethodBinding;
  import javax.faces.el.ValueBinding;
  import java.io.IOException;
  import java.util.Arrays;
  import java.util.Collection;
  
  /**
   * end a conversation
   *
   * @author imario@apache.org
   */
  public class UIEndConversation extends AbstractConversationComponent
  {
      public static final String COMPONENT_TYPE = "org.apache.myfaces.EndConversation";
  
      private String onOutcome;
      private String errorOutcome;
      private Boolean restart;
      private MethodBinding restartAction;
  
      private boolean inited = false;
  
      /*
      public static class ConversationEndAction extends AbstractConversationActionListener
      {
          public void doConversationAction(AbstractConversationComponent abstractConversationComponent)
          {
              ConversationManager.getInstance().registerEndConversation(getConversationName());
          }
      }
      */
  
      public void encodeBegin(FacesContext context) throws IOException
      {
          super.encodeBegin(context);
  
          UICommand command = ConversationUtils.findParentCommand(this);
          if (command != null)
          {
              if (!inited)
              {
                  /*
                  ConversationEndAction actionListener = new ConversationEndAction();
                  actionListener.setConversationName(getName());
                  command.addActionListener(actionListener);
                  */
                  MethodBinding original = command.getAction();
                  command.setAction(new EndConversationMethodBindingFacade(
                      getName(),
                      getOnOutcomes(),
                      original,
                      getErrorOutcome(),
                      getRestart(),
                      getRestartAction()));
                  inited = true;
              }
          }
          else
          {
              ConversationUtils.endAndRestartConversation(context,
                  getName(),
                  getRestart(),
                  getRestartAction());
          }
      }
  
      private Collection getOnOutcomes()
      {
          String onOutcome = getOnOutcome();
          if (onOutcome == null || onOutcome.trim().length() < 1)
          {
              return null;
          }
  
          return Arrays.asList(StringUtils.trim(StringUtils.splitShortString(onOutcome, ',')));
     }
 
     public void restoreState(FacesContext context, Object state)
     {
         Object[] states = (Object[]) state;
         super.restoreState(context, states[0]);
         inited = ((Boolean) states[1]).booleanValue();
         onOutcome = (String) states[2];
         errorOutcome = (String) states[3];
         restart = (Boolean) states[4];
         restartAction = (MethodBinding) restoreAttachedState(context, states[5]);
     }
 
     public Object saveState(FacesContext context)
     {
         return new Object[]
             {
                 super.saveState(context),
                 inited ? Boolean.TRUE : Boolean.FALSE,
                 onOutcome,
                 errorOutcome,
                 restart,
                 saveAttachedState(context, restartAction)
             };
     }
 
     /**
      * end the conversation only if the action outcome matches the given onOutcome. 
      * 
      * This can be a comma separated list.
      * 
      * @JSFProperty
      * @return
      */
     public String getOnOutcome()
     {
         if (onOutcome != null)
         {
             return onOutcome;
         }
         ValueBinding vb = getValueBinding("onOutcome");
         if (vb == null)
         {
             return null;
         }
         return (String) vb.getValue(getFacesContext());
     }
 
     public void setOnOutcome(String onOutcome)
     {
         this.onOutcome = onOutcome;
     }
 
     /**
      * on exception use the given outcome for further navigation
      * 
      * @JSFProperty
      * @return
      */
     public String getErrorOutcome()
     {
         if (errorOutcome != null)
         {
             return errorOutcome;
         }
         ValueBinding vb = getValueBinding("errorOutcome");
         if (vb == null)
         {
             return null;
         }
         return (String) vb.getValue(getFacesContext());
     }
 
     public void setErrorOutcome(String errorOutcome)
     {
         this.errorOutcome = errorOutcome;
     }
 
     /**
      * true|false|valueBinding - true if the conversation should be restarted immediately
      * 
      * @JSFProperty
      * @return
      */
     public Boolean getRestart()
     {
         if (restart != null)
         {
             return restart;
         }
         ValueBinding vb = getValueBinding("restart");
         if (vb == null)
         {
             return null;
         }
         return (Boolean) vb.getValue(getFacesContext());
     }
 
     public void setRestart(Boolean restart)
     {
         this.restart = restart;
     }
 
     /**
      * the action which should be called in case of a restart
      * 
      * @JSFProperty
      *   methodSignature = "java.lang.String"
      *   returnSignature = "void"
      *   stateHolder = "true"
      * @return
      */
     public MethodBinding getRestartAction()
     {
         return restartAction;
     }
 
     public void setRestartAction(MethodBinding restartAction)
     {
         this.restartAction = restartAction;
     }
 }