/*
    * Copyright (C) 2003-2008 eXo Platform SAS.
    *
    * This program is free software; you can redistribute it and/or
    * modify it under the terms of the GNU Affero General Public License
    * as published by the Free Software Foundation; either version 3
    * of the License, or (at your option) any later version.
    *
    * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, see<http://www.gnu.org/licenses/>.
   */
  package org.exoplatform.wcm.webui.paginator;
  
  import org.exoplatform.commons.exception.ExoMessageException;
  import org.exoplatform.resolver.ResourceResolver;
  import org.exoplatform.services.log.ExoLogger;
  import org.exoplatform.services.log.Log;
  import org.exoplatform.webui.application.WebuiRequestContext;
  import org.exoplatform.webui.config.annotation.ComponentConfig;
  import org.exoplatform.webui.config.annotation.EventConfig;
  import org.exoplatform.webui.core.UIComponent;
  import org.exoplatform.webui.core.UIPageIterator;
  import org.exoplatform.webui.core.lifecycle.Lifecycle;
  import org.exoplatform.webui.event.Event;
  import org.exoplatform.webui.event.EventListener;
  
  /**
   * Created by The eXo Platform SAS
   * Author : Hoa Pham
   * hoa.phamvu@exoplatform.com
   * Oct 23, 2008
   */
  @ComponentConfig(
      lifecycle = Lifecycle.class,
      events = @EventConfig(listeners = UICustomizeablePaginator.ShowPageActionListener.class )
  )
  public class UICustomizeablePaginator extends UIPageIterator {
  
    private static final Log LOG = ExoLogger.getLogger(UICustomizeablePaginator.class.getName());
    
    /** The template path. */
    private String templatePath;
  
    /** The resource resolver. */
    private ResourceResolver resourceResolver;
  
    /** Page Mode */
    private String pageMode;
  
    /**
     * Instantiates a new uI customizeable paginator.
     */
    public UICustomizeablePaginator() {
    }
  
    /**
     * Gets the total pages.
     *
     * @return the total pages
     */
    public int getTotalPages() { return getPageList().getAvailablePage(); }
  
    /**
     * Gets the total items.
     *
     * @return the total items
     */
    public int getTotalItems() { return getPageList().getAvailable(); }
  
    /**
     * Gets the item per page.
     *
     * @return the item per page
     */
    public int getItemPerPage() { return getPageList().getPageSize(); }
  
    /**
     * Inits the.
     *
     * @param resourceResolver the resource resolver
     * @param templatePath the template path
     */
    public void init(ResourceResolver resourceResolver, String templatePath) {
      this.resourceResolver = resourceResolver;
      this.templatePath = templatePath;
    }
  
    /**
     * Sets the template path.
     *
     * @param path the new template path
     */
    public void setTemplatePath(String path) { this.templatePath = path; }
  
   /**
    * Sets the resource resolver.
    *
    * @param resolver the new resource resolver
    */
   public void setResourceResolver(ResourceResolver resolver) { this.resourceResolver = resolver; }
 
   /* (non-Javadoc)
    * @see org.exoplatform.webui.core.UIComponent#getTemplate()
    */
   public String getTemplate() {
     if(templatePath != null)
       return templatePath;
     return super.getTemplate();
   }
 
   /**
    * gets the page mode (none, more or pagination)
    * @return PageMode
    */
   public String getPageMode() {
     return pageMode;
   }
 
   /**
    * sets the page mode (none, more or pagination)
    *
    * @param pageMode
    */
   public void setPageMode(String pageMode) {
     this.pageMode = pageMode;
   }
   
   /*
    * (non-Javadoc)
    * @see
    * org.exoplatform.webui.core.UIComponent#getTemplateResourceResolver(org.
    * exoplatform.webui.application.WebuiRequestContext, java.lang.String)
    */
   public ResourceResolver getTemplateResourceResolver(WebuiRequestContext context,String template) {
     if(resourceResolver != null)
       return resourceResolver;
     return super.getTemplateResourceResolver(context,template);
   }
 
   /**
    * The listener interface for receiving showPageAction events.
    * The class that is interested in processing a showPageAction
    * event implements this interface, and the object created
    * with that class is registered with a component using the
    * component's <code>addShowPageActionListener</code> method. When
    * the showPageAction event occurs, that object's appropriate
    * method is invoked.
    *
    */
   static  public class ShowPageActionListener extends EventListener<UICustomizeablePaginator> {
 
     /* (non-Javadoc)
      * @see org.exoplatform.webui.event.EventListener#execute(org.exoplatform.webui.event.Event)
      */
     public void execute(Event<UICustomizeablePaginator> event) throws Exception {
       UICustomizeablePaginator uiPaginator = event.getSource() ;
       int page = Integer.parseInt(event.getRequestContext().getRequestParameter(OBJECTID)) ;
       try {
         uiPaginator.setCurrentPage(page) ;
       } catch (ExoMessageException e) {
         if (LOG.isWarnEnabled()) {
           LOG.warn(e.getMessage());
         }
       }
       UIComponent parent = uiPaginator.getParent();
       if(parent == null) return ;
       event.getRequestContext().addUIComponentToUpdateByAjax(parent);
       parent.broadcast(event,event.getExecutionPhase());
     }
   }
 }