/*
    * Copyright (C) 2003-2007 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.ecm.webui.component.admin.namespace;
  
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.Comparator;
  import java.util.List;
  
  import javax.jcr.NamespaceRegistry;
  
  import org.exoplatform.commons.utils.LazyPageList;
  import org.exoplatform.commons.utils.ListAccess;
  import org.exoplatform.commons.utils.ListAccessImpl;
  import org.exoplatform.ecm.webui.core.UIPagingGrid;
  import org.exoplatform.services.jcr.RepositoryService;
  import org.exoplatform.webui.config.annotation.ComponentConfig;
  import org.exoplatform.webui.config.annotation.EventConfig;
  import org.exoplatform.webui.event.Event;
  import org.exoplatform.webui.event.EventListener;
  
  /**
   * Created by The eXo Platform SARL
   * Author : pham tuan
   *          phamtuanchip@yahoo.de
   * September 20, 2006
   * 16:37:15
   */
  @ComponentConfig(
      template = "system:/groovy/ecm/webui/UIGridWithButton.gtmpl",
      events = {@EventConfig(listeners = UINamespaceList.AddNamespaceActionListener.class)}
  )
  
  public class UINamespaceList extends UIPagingGrid {
  
    private static String[] NAMESPACE_BEAN_FIELD = {"prefix", "uri"} ;
  
    public UINamespaceList() throws Exception {
      getUIPageIterator().setId("NamespaceListIterator") ;
      configure("prefix", NAMESPACE_BEAN_FIELD, null) ;
    }
  
    public String[] getActions() { return new String[] {"AddNamespace"} ;}
  
    @SuppressWarnings("unchecked")
    public void refresh(int currentPage) throws Exception {
      NamespaceRegistry namespaceRegistry = getApplicationComponent(RepositoryService.class).getCurrentRepository()
                                                                                            .getNamespaceRegistry();
      List<NamespaceBean> nspBeans = new ArrayList<NamespaceBean>();
      String[] prefixs = namespaceRegistry.getPrefixes();
      for (int i = 0; i < prefixs.length; i++) {
        String prefix = prefixs[i];
        if (prefix == null || prefix.trim().length() == 0) {
          continue;
        }
        NamespaceBean bean = new NamespaceBean(prefix, namespaceRegistry.getURI(prefix));
        nspBeans.add(bean);
      }
      Collections.sort(nspBeans, new NameSpaceComparator());
      ListAccess<NamespaceBean> namespaceList = new ListAccessImpl<NamespaceBean>(NamespaceBean.class,
                                                                                  nspBeans);
      LazyPageList<NamespaceBean> dataPageList = new LazyPageList<NamespaceBean>(namespaceList,
                                                                                 getUIPageIterator().getItemsPerPage());
      getUIPageIterator().setTotalItems(nspBeans.size());
      getUIPageIterator().setPageList(dataPageList);
      if (currentPage > getUIPageIterator().getAvailablePage())
        getUIPageIterator().setCurrentPage(getUIPageIterator().getAvailablePage());
      else
        getUIPageIterator().setCurrentPage(currentPage);
    }
  
    static public class NameSpaceComparator implements Comparator<NamespaceBean> {
      public int compare(NamespaceBean o1, NamespaceBean o2) throws ClassCastException {
        String name1 = o1.getPrefix();
        String name2 = o2.getPrefix();
        return name1.compareToIgnoreCase(name2);
      }
    }
  
    static public class AddNamespaceActionListener extends EventListener<UINamespaceList> {
      public void execute(Event<UINamespaceList> event) throws Exception {
        UINamespaceManager uiManager = event.getSource().getParent() ;
        uiManager.initPopup() ;
        UINamespaceForm uiForm = uiManager.findFirstComponentOfType(UINamespaceForm.class) ;
        uiForm.reset() ;
       event.getRequestContext().addUIComponentToUpdateByAjax(uiManager) ;
     }
   }
 
   public static class NamespaceBean {
     private String prefix ;
     private String uri ;
 
     public NamespaceBean(String prefix, String uri){
       this.prefix = prefix ;
       this.uri = uri ;
     }
 
     public String getPrefix () { return prefix ;}
     public String getUri () { return uri ;}
   }
 }