/*
    * Copyright (c) 2002-2014, 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.calendar.service.search;
  
  import fr.paris.lutece.plugins.calendar.business.CalendarHome;
  import fr.paris.lutece.plugins.calendar.business.Event;
  import fr.paris.lutece.plugins.calendar.business.OccurrenceEvent;
  import fr.paris.lutece.plugins.calendar.business.SimpleEvent;
  import fr.paris.lutece.plugins.calendar.service.EventComparator;
  import fr.paris.lutece.plugins.calendar.service.EventImageResourceService;
  import fr.paris.lutece.plugins.calendar.web.Constants;
  import fr.paris.lutece.portal.service.plugin.Plugin;
  import fr.paris.lutece.portal.service.spring.SpringContextService;
  import fr.paris.lutece.portal.service.util.AppLogService;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.Collections;
  import java.util.Date;
  import java.util.HashMap;
  import java.util.List;
  
  
  /**
   * DocumentSearchService
   */
  public class CalendarSearchService
  {
      private static final String BEAN_SEARCH_ENGINE = "calendar.calendarLuceneSearchEngine";
      private static final String REGEX_ID_EVENT = "^[\\d]+_" + Constants.CALENDAR_SHORT_NAME + "$";
      private static final String REGEX_ID_DOCUMENT = "^[\\d]+_" + Constants.DOCUMENT_SHORT_NAME + "$";
      private static final String UNDERSCORE = "_";
  
      // Constants corresponding to the variables defined in the lutece.properties file
      private static CalendarSearchService _singleton;
  
      /**
       * Get the HelpdeskSearchService instance
       * 
       * @return The {@link CalendarSearchService}
       */
      public static CalendarSearchService getInstance( )
      {
          if ( _singleton == null )
          {
              _singleton = new CalendarSearchService( );
          }
  
          return _singleton;
      }
  
      /**
       * Return search results
       * @param arrayAgendaIds The calendar ids
       * @param arrayCategory the category ids
       * @param strQuery The search query
       * @param dateBegin The date begin
       * @param dateEnd The date end
       * @param plugin The plugin
       * @return Results as a collection of SearchResult
       */
      public List<Event> getSearchResults( String[] arrayAgendaIds, String[] arrayCategory, String strQuery,
              Date dateBegin, Date dateEnd, Plugin plugin )
      {
          List<Event> listEvent = new ArrayList<Event>( );
          HashMap<String, Event> hmListEvent = new HashMap<String, Event>( );
          CalendarSearchEngine engine = SpringContextService.getBean( BEAN_SEARCH_ENGINE );
          List<CalendarSearchResult> listResults = engine.getSearchResults( arrayAgendaIds, arrayCategory, strQuery,
                 dateBegin, dateEnd );
 
         for ( CalendarSearchResult searchResult : listResults )
         {
             if ( ( ( searchResult.getId( ) != null ) && searchResult.getId( ).matches( REGEX_ID_EVENT ) )
                     || ( ( searchResult.getId( ) != null ) && searchResult.getId( ).matches( REGEX_ID_DOCUMENT ) ) )
             {
                 try
                 {
                     //Retrieve all occurences of an event
                     OccurrenceEvent occurence = CalendarHome.findOccurrence(
                             Integer.parseInt( searchResult.getId( ).substring( 0,
                                     searchResult.getId( ).indexOf( UNDERSCORE ) ) ), plugin );
 
                     //Retrieve the event related to the occurence
                     SimpleEvent event = CalendarHome.findEvent( occurence.getEventId( ), plugin );
                    
                     event.setUrl( searchResult.getUrl( ) );
                     event.setType( searchResult.getType( ) );
                     event.setImageUrl( EventImageResourceService.getInstance( ).getResourceImageEvent( event.getId( ) ) );
 
                     event.setDescription( searchResult.getHtmlSummary( ) );
 
                     //if it is not already present stroring the event to the temp list
                     if ( !hmListEvent.containsKey( Integer.toString( event.getId( ) ) ) )
                     {
                         hmListEvent.put( Integer.toString( event.getId( ) ), event );
                     }
                 }
                 catch ( NullPointerException e )
                 {
                     AppLogService.error( e );
                 }
             }
         }
 
         //Adding the event to final list
         if ( !hmListEvent.isEmpty( ) )
         {
             Collection<Event> collection = hmListEvent.values( );
             listEvent = new ArrayList<Event>( collection );
             Collections.sort( listEvent, new EventComparator( ) );
         }
 
         return listEvent;
     }
 }