/***************************************************************************
    * Copyright (C) 2003-2009 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.explorer.rightclick.manager;
  
  import java.util.Arrays;
  import java.util.List;
  import java.util.regex.Matcher;
  
  import javax.jcr.Node;
  import javax.jcr.PathNotFoundException;
  import javax.jcr.Session;
  import javax.jcr.nodetype.ConstraintViolationException;
  
  import org.exoplatform.ecm.webui.component.explorer.UIJCRExplorer;
  import org.exoplatform.ecm.webui.component.explorer.UIWorkingArea;
  import org.exoplatform.ecm.webui.component.explorer.control.filter.CanCutNodeFilter;
  import org.exoplatform.ecm.webui.component.explorer.control.filter.IsNotEditingDocumentFilter;
  import org.exoplatform.ecm.webui.component.explorer.control.filter.IsNotInTrashFilter;
  import org.exoplatform.ecm.webui.component.explorer.control.filter.IsNotLockedFilter;
  import org.exoplatform.ecm.webui.component.explorer.control.filter.IsNotTrashHomeNodeFilter;
  import org.exoplatform.ecm.webui.component.explorer.control.listener.UIWorkingAreaActionListener;
  import org.exoplatform.ecm.webui.utils.JCRExceptionManager;
  import org.exoplatform.ecm.webui.utils.Utils;
  import org.exoplatform.services.cms.clipboard.ClipboardService;
  import org.exoplatform.services.cms.clipboard.jcr.model.ClipboardCommand;
  import org.exoplatform.services.log.ExoLogger;
  import org.exoplatform.services.log.Log;
  import org.exoplatform.services.security.ConversationState;
  import org.exoplatform.services.wcm.utils.WCMCoreUtils;
  import org.exoplatform.web.application.ApplicationMessage;
  import org.exoplatform.webui.config.annotation.ComponentConfig;
  import org.exoplatform.webui.config.annotation.EventConfig;
  import org.exoplatform.webui.core.UIApplication;
  import org.exoplatform.webui.event.Event;
  import org.exoplatform.webui.ext.filter.UIExtensionFilter;
  import org.exoplatform.webui.ext.filter.UIExtensionFilters;
  import org.exoplatform.webui.ext.manager.UIAbstractManager;
  import org.exoplatform.webui.ext.manager.UIAbstractManagerComponent;
  
  /**
   * Created by The eXo Platform SARL
   * Author : Hoang Van Hung
   *          hunghvit@gmail.com
   * Aug 6, 2009
   */
  
  @ComponentConfig(
      events = {
        @EventConfig(listeners = CutManageComponent.CutActionListener.class)
      }
  )
  
  public class CutManageComponent extends UIAbstractManagerComponent {
  
    private final static Log       LOG  = ExoLogger.getLogger(CutManageComponent.class.getName());
  
    private static final List<UIExtensionFilter> FILTERS
        = Arrays.asList(new UIExtensionFilter[] { new IsNotInTrashFilter(),
                                                  new CanCutNodeFilter(),
                                                  new IsNotLockedFilter(),
                                                  new IsNotTrashHomeNodeFilter(),
                                                  new IsNotEditingDocumentFilter()});
  
    @UIExtensionFilters
    public List<UIExtensionFilter> getFilters() {
      return FILTERS;
    }
  
    private static void processCut(String nodePath,
                                   Event<CutManageComponent> event,
                                   UIJCRExplorer uiExplorer,
                                   boolean isMultiSelect) throws Exception {
      UIWorkingArea uiWorkingArea = uiExplorer.getChild(UIWorkingArea.class);
      UIApplication uiApp = event.getSource().getAncestorOfType(UIApplication.class);
      Matcher matcher = UIWorkingArea.FILE_EXPLORER_URL_SYNTAX.matcher(nodePath);
      String wsName = null;
      if (matcher.find()) {
        wsName = matcher.group(1);
        nodePath = matcher.group(2);
      } else {
        throw new IllegalArgumentException("The ObjectId is invalid '"+ nodePath + "'");
      }
      Session session = uiExplorer.getSessionByWorkspace(wsName);
      Node selectedNode;
     try {
       // Use the method getNodeByPath because it is link aware
       selectedNode = uiExplorer.getNodeByPath(nodePath, session, false);
       // Reset the path to manage the links that potentially create virtual path
       nodePath = selectedNode.getPath();
       // Reset the session to manage the links that potentially change of workspace
       session = selectedNode.getSession();
       // Reset the workspace name to manage the links that potentially change of workspace
       wsName = session.getWorkspace().getName();
     } catch(ConstraintViolationException cons) {
       uiExplorer.getSession().refresh(false);
       uiExplorer.refreshExplorer();
       uiApp.addMessage(new ApplicationMessage("UIPopupMenu.msg.constraintviolation-exception",
           null,ApplicationMessage.WARNING));
       
       uiExplorer.updateAjax(event);
       return;
     } catch(PathNotFoundException path) {
       uiApp.addMessage(new ApplicationMessage("UIPopupMenu.msg.path-not-found-exception",
           null,ApplicationMessage.WARNING));
       
       return;
     } catch (Exception e) {
       if (LOG.isErrorEnabled()) {
         LOG.error("an unexpected error occurs while cuting the node", e);
       }
       JCRExceptionManager.process(uiApp, e);
       return;
     }
     try {
       ClipboardCommand clipboard = new ClipboardCommand(ClipboardCommand.CUT, nodePath, wsName);
       ClipboardService clipboardService = WCMCoreUtils.getService(ClipboardService.class);
       String userId = ConversationState.getCurrent().getIdentity().getUserId();
       clipboardService.addClipboardCommand(userId, clipboard, false);
       if (isMultiSelect) {
         clipboardService.addClipboardCommand(userId, clipboard, true);
       }
     } catch (Exception e) {
       JCRExceptionManager.process(uiApp, e);
     }
   }
 
   private static void processMultipleCut(String[] nodePaths,
                                          Event<CutManageComponent> event,
                                          UIJCRExplorer uiExplorer) throws Exception {
     for(int i=0; i< nodePaths.length; i++) {
       processCut(nodePaths[i], event, uiExplorer, true);
     }
   }
 
   public static void cutManage(Event<CutManageComponent> event, UIJCRExplorer uiExplorer) throws Exception {
     UIWorkingArea uiWorkingArea = event.getSource().getParent();
     String nodePath = event.getRequestContext().getRequestParameter(OBJECTID);
     if(nodePath.indexOf(";") > -1) {
       ClipboardService clipboardService = WCMCoreUtils.getService(ClipboardService.class);
       String userId = ConversationState.getCurrent().getIdentity().getUserId();
       clipboardService.clearClipboardList(userId, true);
       processMultipleCut(Utils.removeChildNodes(nodePath), event, uiExplorer);
     } else {
       processCut(nodePath, event, uiExplorer, false);
     }
   }
 
   public static class CutActionListener extends UIWorkingAreaActionListener<CutManageComponent> {
     public void processEvent(Event<CutManageComponent> event) throws Exception {
       UIJCRExplorer uiExplorer = event.getSource().getAncestorOfType(UIJCRExplorer.class);
       cutManage(event, uiExplorer);
     }
   }
 
   @Override
   public Class<? extends UIAbstractManager> getUIAbstractManagerClass() {
     return null;
   }
 
 }