/*
    * Copyright (c) 2002-2018, Mairie de Paris
    * All rights reserved.
    *
    * Redistribution and use in source and binary forms, with or without
    * modification, are permitted provided that the following conditions
    * are met:
    *
    *  1. Redistributions of source code must retain the above copyright notice
   *     and the following disclaimer.
   *
   *  2. Redistributions in binary form must reproduce the above copyright notice
   *     and the following disclaimer in the documentation and/or other materials
   *     provided with the distribution.
   *
   *  3. Neither the name of 'Mairie de Paris' nor 'Lutece' nor the names of its
   *     contributors may be used to endorse or promote products derived from
   *     this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   *
   * License 1.0
   */
  package fr.paris.lutece.plugins.easyrulesbot.service.bot;
  
  import fr.paris.lutece.plugins.chatbot.business.BotPost;
  import fr.paris.lutece.plugins.chatbot.service.bot.AbstractChatBot;
  import fr.paris.lutece.plugins.easyrulesbot.service.bot.rules.BotRule;
  import fr.paris.lutece.plugins.easyrulesbot.service.response.filters.ResponseFilter;
  import fr.paris.lutece.plugins.easyrulesbot.service.response.exceptions.ResponseProcessingException;
  import fr.paris.lutece.portal.web.l10n.LocaleService;
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Locale;
  import java.util.Map;
  import org.easyrules.api.Rule;
  import org.easyrules.api.RulesEngine;
  
  /**
   * EasyRulesBot
   */
  public class EasyRulesBot extends AbstractChatBot
  {
      private static final String PROPERTY_LAST_MESSAGE = "easyrulesbot.bot.lastMessage";
  
      private static Map<String, BotExecutor> _mapBotExecutor = new HashMap<>( );
      private RulesEngine _engine;
      private List<ResponseFilter> _listResponseFilters;
  
      /**
       * {@inheritDoc }
       */
      @Override
      public List<BotPost> processUserMessage( String strMessage, String strConversationId, Locale locale )
      {
          List<BotPost> listBotPost;
          BotExecutor executor = _mapBotExecutor.get( strConversationId );
          if ( executor == null )
          {
              executor = new BotExecutor( this, locale );
              _mapBotExecutor.put( strConversationId, executor );
          }
  
          try
          {
              listBotPost = executor.processResponse( strMessage );
          }
          catch( ResponseProcessingException ex )
          {
              listBotPost = new ArrayList<>( );
              listBotPost.add( new BotPost( ex.getMessage( ), BotPost.CONTENT_TYPE_TEXT ) );
          }
  
          executor.fireRules( );
  
          String strQuestion = executor.getQuestion( );
          
          if( strQuestion != null )
          {
              listBotPost.add( new BotPost( strQuestion, BotPost.CONTENT_TYPE_TEXT ) );
          }
  
          executor.traceData( );
  
          return listBotPost;
      }
  
      /**
      * Returns the RulesEngine
      *
      * @return The RulesEngine
      */
     public RulesEngine getRulesEngine( )
     {
         return _engine;
     }
 
     /**
      * Sets the RulesEngine
      *
      * @param rulesEngine
      *            The RulesEngine
      */
     public void setRulesEngine( RulesEngine rulesEngine )
     {
         _engine = rulesEngine;
     }
 
     /**
      * Set the list of response filters
      *
      * @param list
      *            The list
      *
      */
     public void setListResponseFilters( List<ResponseFilter> list )
     {
         _listResponseFilters = list;
     }
 
     /**
      * The list of response filters
      *
      * @return The list
      */
     public List<ResponseFilter> getResponseFilters( )
     {
         return _listResponseFilters;
     }
     
     /**
      * {@inheritDoc }
      */
     @Override
     public void reset( String strConversationId )
     {
         super.reset( strConversationId );
         
         _mapBotExecutor.remove( strConversationId );
     }
     
     /**
      * {@inheritDoc }
      */
     @Override
     public String toString()
     {
         StringBuilder sbOutput = new StringBuilder( "\nEASYRULE BOT\n");
         sbOutput.append( "\n key : " ).append( getKey() );
         sbOutput.append( "\n name : " ).append( getName( LocaleService.getDefault()) );
         sbOutput.append( "\n description : " ).append( getDescription( LocaleService.getDefault() ) );
         sbOutput.append( "\n avatar URL : " ).append( getAvatarUrl() );
         sbOutput.append( "\n welcome message : " ).append( getWelcomeMessage() );
         sbOutput.append( "\n Rules : " );
         for( Rule rule : getRulesEngine().getRules() )
         {
             BotRule br = (BotRule) rule;
             sbOutput.append( br );
         }
         return sbOutput.toString();
     }
 
     
 }