/***************************************************************************
 * 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.admin.taxonomy;

import java.util.ArrayList;
import java.util.List;

import javax.jcr.Node;
import javax.jcr.NodeIterator;
import javax.jcr.PathNotFoundException;
import javax.jcr.ReferentialIntegrityException;

import org.exoplatform.commons.utils.LazyPageList;
import org.exoplatform.commons.utils.ListAccess;
import org.exoplatform.commons.utils.ListAccessImpl;
import org.exoplatform.ecm.jcr.model.ClipboardCommand;
import org.exoplatform.ecm.webui.component.admin.taxonomy.action.UIActionForm;
import org.exoplatform.ecm.webui.component.admin.taxonomy.action.UIActionTaxonomyManager;
import org.exoplatform.ecm.webui.component.admin.taxonomy.info.UIPermissionForm;
import org.exoplatform.ecm.webui.component.admin.taxonomy.info.UIPermissionInfo;
import org.exoplatform.ecm.webui.component.admin.taxonomy.info.UIPermissionManager;
import org.exoplatform.services.cms.taxonomy.TaxonomyService;
import org.exoplatform.services.cms.taxonomy.TaxonomyTreeData;
import org.exoplatform.services.log.ExoLogger;
import org.exoplatform.services.log.Log;
import org.exoplatform.services.wcm.core.NodeLocation;
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.core.UIContainer;
import org.exoplatform.webui.core.UIPageIterator;
import org.exoplatform.webui.core.UIPopupContainer;
import org.exoplatform.webui.event.Event;
import org.exoplatform.webui.event.EventListener;

/**
 * Created by The eXo Platform SARL
 * Author : Hoang Van Hung
 *          hunghvit@gmail.com
 * Apr 7, 2009
 */

@ComponentConfig(
    template =  "app:/groovy/webui/component/admin/taxonomy/UITaxonomyTreeWorkingArea.gtmpl",
    events = {
        @EventConfig(listeners = UITaxonomyTreeWorkingArea.PreviousActionListener.class),
        @EventConfig(listeners = UITaxonomyTreeWorkingArea.AddActionListener.class),
        @EventConfig(listeners = UITaxonomyTreeWorkingArea.RemoveActionListener.class,
                     confirm = "UITaxonomyManager.msg.confirm-delete"),
        @EventConfig(listeners = UITaxonomyTreeWorkingArea.CopyActionListener.class),
        @EventConfig(listeners = UITaxonomyTreeWorkingArea.PasteActionListener.class),
        @EventConfig(listeners = UITaxonomyTreeWorkingArea.CutActionListener.class),
        @EventConfig(listeners = UITaxonomyTreeWorkingArea.ViewPermissionActionListener.class)
    }
)

public class UITaxonomyTreeWorkingArea extends UIContainer {
  private UIPageIterator   uiPageIterator_;

  private List<NodeLocation>       taxonomyNodes_;
  private static final Log LOG  = ExoLogger.getLogger(UITaxonomyTreeWorkingArea.class.getName());
  private ClipboardCommand clipboard_ = new ClipboardCommand();

  private String           selectedPath_;

  private String[] acceptedNodeTypes = {};

  private String[] actions_ = { "Previous" };
  public UITaxonomyTreeWorkingArea() throws Exception {
    uiPageIterator_ = addChild(UIPageIterator.class, null, "UICategoriesSelect");
  }

  public UIPageIterator getUIPageIterator() { return uiPageIterator_; }

  public void updateGrid() throws Exception {
    ListAccess<Object> nodeList = new ListAccessImpl<Object>(Object.class, getNodeList());
    LazyPageList<Object> dataPageList = new LazyPageList<Object>(nodeList, 10);
    uiPageIterator_.setPageList(dataPageList);
  }

  public String[] getActions() {return actions_;}

  public List getListNodes() throws Exception { 
    return NodeLocation.getNodeListByLocationList(uiPageIterator_.getCurrentPageData()); 
  }

  public void setNodeList(List<Node> nodes) { 
    taxonomyNodes_ = NodeLocation.getLocationsByNodeList(nodes);  
  }
  public List getNodeList() {return taxonomyNodes_; }

  public boolean isRootNode() throws Exception {
    UITaxonomyTreeCreateChild uiManager = getParent();
    String selectedPath = uiManager.getSelectedPath();
    if (selectedPath == null)
      selectedPath = uiManager.getRootNode().getPath();
    if (selectedPath.equals(uiManager.getRootNode().getPath()))
      return true;
    return false;
  }

  boolean matchNodeType(Node node) throws Exception {
    if(acceptedNodeTypes == null || acceptedNodeTypes.length == 0) return true;
    for(String nodeType: acceptedNodeTypes) {
      if(node.isNodeType(nodeType)) return true;
    }
    return false;
  }

  public void update() throws Exception {
    UITaxonomyTreeCreateChild uiManager = getParent();
    if (selectedPath_ != null) {
      try {
        Node selectedTaxonomy = uiManager.getNodeByPath(selectedPath_);
        NodeIterator nodeIter = selectedTaxonomy.getNodes();
        List<Node> listNodes = new ArrayList<Node>();
        while (nodeIter.hasNext()) {
          Node node = nodeIter.nextNode();
          if (matchNodeType(node))
            listNodes.add(node);
        }
        setNodeList(listNodes);
      } catch (PathNotFoundException e) {
        if (LOG.isWarnEnabled()) {
          LOG.warn(e.getMessage());
        }
      }
    }
    updateGrid();
  }

  public String[] getAcceptedNodeTypes() {
    return acceptedNodeTypes;
  }

  public void setAcceptedNodeTypes(String[] acceptedNodeTypes) {
    this.acceptedNodeTypes = acceptedNodeTypes;
  }

  public void setSelectedPath(String selectedPath) { selectedPath_ = selectedPath; }

  public static class AddActionListener extends EventListener<UITaxonomyTreeWorkingArea> {
    public void execute(Event<UITaxonomyTreeWorkingArea> event) throws Exception {
      UITaxonomyTreeWorkingArea uiTreeWorkingArea = event.getSource();
      String path = event.getRequestContext().getRequestParameter(OBJECTID);
      UITaxonomyTreeCreateChild uiTaxonomyTreeCreateChild = uiTreeWorkingArea.getParent();
      uiTaxonomyTreeCreateChild.initPopup(path);
      event.getRequestContext().addUIComponentToUpdateByAjax(uiTaxonomyTreeCreateChild);
    }
  }

  public static class RemoveActionListener extends EventListener<UITaxonomyTreeWorkingArea> {
    public void execute(Event<UITaxonomyTreeWorkingArea> event) throws Exception {
      UITaxonomyTreeWorkingArea uiTreeWorkingArea = event.getSource();
      UITaxonomyTreeCreateChild uiTaxonomyTreeCreateChild = uiTreeWorkingArea.getParent();
      UIApplication uiApp = uiTreeWorkingArea.getAncestorOfType(UIApplication.class);
      String path = event.getRequestContext().getRequestParameter(OBJECTID);
      Node selectedNode = uiTaxonomyTreeCreateChild.getNodeByPath(path);
      try {
        uiTreeWorkingArea.setSelectedPath(selectedNode.getParent().getPath());
        uiTreeWorkingArea.getApplicationComponent(TaxonomyService.class)
                         .removeTaxonomyNode(uiTaxonomyTreeCreateChild.getWorkspace(), path);
      } catch (ReferentialIntegrityException ref) {
        Object[] arg = { path };
        uiApp.addMessage(new ApplicationMessage("UITaxonomyWorkingArea.msg.reference-exception",
            arg, ApplicationMessage.WARNING));
        
        return;
      } catch (Exception e) {
        if (LOG.isErrorEnabled()) {
          LOG.error("Unexpected error", e);
        }
        Object[] arg = { path };
        uiApp.addMessage(new ApplicationMessage("UITaxonomyWorkingArea.msg.path-error", arg,
            ApplicationMessage.WARNING));
        
        return;
      }
      if (uiTaxonomyTreeCreateChild.getChildById("TaxonomyPopupCreateChild") != null) {
        uiTaxonomyTreeCreateChild.removeChildById("TaxonomyPopupCreateChild");
      }
      uiTreeWorkingArea.update();
      event.getRequestContext().addUIComponentToUpdateByAjax(uiTaxonomyTreeCreateChild);
    }
  }

  public static class CopyActionListener extends EventListener<UITaxonomyTreeWorkingArea> {
    public void execute(Event<UITaxonomyTreeWorkingArea> event) throws Exception {
      UITaxonomyTreeWorkingArea uiManager = event.getSource();
      String realPath = event.getRequestContext().getRequestParameter(OBJECTID);
      uiManager.clipboard_ = new ClipboardCommand();
      uiManager.clipboard_.setType(ClipboardCommand.COPY);
      uiManager.clipboard_.setSrcPath(realPath);
      event.getRequestContext().addUIComponentToUpdateByAjax(uiManager);
    }
  }

  public static class PasteActionListener extends EventListener<UITaxonomyTreeWorkingArea> {
    public void execute(Event<UITaxonomyTreeWorkingArea> event) throws Exception {
      UITaxonomyTreeWorkingArea uiWorkingArea = event.getSource();
      UITaxonomyTreeCreateChild uiTaxonomyTreeCreateChild = uiWorkingArea.getParent();
      UITaxonomyTreeContainer uiTaxonomyTreeContainer = uiWorkingArea
          .getAncestorOfType(UITaxonomyTreeContainer.class);
      TaxonomyTreeData taxoTreeData = uiTaxonomyTreeContainer.getTaxonomyTreeData();
      String realPath = event.getRequestContext().getRequestParameter(OBJECTID);
      UIApplication uiApp = uiWorkingArea.getAncestorOfType(UIApplication.class);
      String type = uiWorkingArea.clipboard_.getType();
      String srcPath = uiWorkingArea.clipboard_.getSrcPath();
      if (type == null || srcPath == null) {
        uiApp.addMessage(new ApplicationMessage("UITaxonomyWorkingArea.msg.can-not-paste", null,
            ApplicationMessage.WARNING));
        
        return;
      }
      if (type.equals(ClipboardCommand.CUT) && realPath.equals(srcPath)) {
        Object[] arg = { realPath };
        uiApp.addMessage(new ApplicationMessage("UITaxonomyWorkingArea.msg.node-is-cutting", arg,
            ApplicationMessage.WARNING));
        
        return;
      }
      String destPath = realPath + srcPath.substring(srcPath.lastIndexOf("/"));
      Node realNode = uiTaxonomyTreeCreateChild.getNodeByPath(realPath);
      if (realNode.hasNode(srcPath.substring(srcPath.lastIndexOf("/") + 1))) {
        Object[] args = { srcPath.substring(srcPath.lastIndexOf("/") + 1) };
        uiApp.addMessage(new ApplicationMessage("UITaxonomyWorkingArea.msg.exist", args,
            ApplicationMessage.WARNING));
        
        return;
      }
      TaxonomyService taxonomyService = uiWorkingArea
          .getApplicationComponent(TaxonomyService.class);
      try {
        taxonomyService.moveTaxonomyNode(taxoTreeData.getTaxoTreeWorkspace(),
                                         srcPath,
                                         destPath,
                                         type);
        UITaxonomyTreeBrowser uiTaxonomyTreeBrowser = uiTaxonomyTreeCreateChild.getChild(UITaxonomyTreeBrowser.class);
        if ((uiTaxonomyTreeBrowser != null) && (uiTaxonomyTreeBrowser.getSelectedNode() != null))
          uiWorkingArea.setSelectedPath(uiTaxonomyTreeBrowser.getSelectedNode().getPath());
        uiTaxonomyTreeCreateChild.update();
      } catch (Exception e) {
        uiApp.addMessage(new ApplicationMessage("UITaxonomyWorkingArea.msg.referential-integrity",
            null, ApplicationMessage.WARNING));
        
        return;
      }
      event.getRequestContext().addUIComponentToUpdateByAjax(uiTaxonomyTreeCreateChild);
    }
  }

  public static class CutActionListener extends EventListener<UITaxonomyTreeWorkingArea> {
    public void execute(Event<UITaxonomyTreeWorkingArea> event) throws Exception {
      UITaxonomyTreeWorkingArea uiManager = event.getSource();
      String realPath = event.getRequestContext().getRequestParameter(OBJECTID);
      uiManager.clipboard_.setType(ClipboardCommand.CUT);
      uiManager.clipboard_.setSrcPath(realPath);
      event.getRequestContext().addUIComponentToUpdateByAjax(uiManager);
    }
  }

  public static class ViewPermissionActionListener extends EventListener<UITaxonomyTreeWorkingArea> {
    public void execute(Event<UITaxonomyTreeWorkingArea> event) throws Exception {
      UITaxonomyTreeWorkingArea uiManager = event.getSource();
      UITaxonomyTreeCreateChild uiTaxonomyTreeCreateChild = uiManager.getParent();
      String path = event.getRequestContext().getRequestParameter(OBJECTID);
      UIPopupContainer uiPopupContainer = 
          uiTaxonomyTreeCreateChild.initPopupPermission(UITaxonomyTreeCreateChild.PERMISSION_ID_POPUP);
      UIPermissionManager uiPerMan = uiPopupContainer.createUIComponent(UIPermissionManager.class, null, null);
      uiPerMan.getChild(UIPermissionInfo.class).setCurrentNode(uiTaxonomyTreeCreateChild.getNodeByPath(path));
      uiPerMan.getChild(UIPermissionForm.class).setCurrentNode(uiTaxonomyTreeCreateChild.getNodeByPath(path));
      uiPopupContainer.activate(uiPerMan, 650,550);
      uiPopupContainer.setRendered(true);
      uiPerMan.checkPermissonInfo(uiTaxonomyTreeCreateChild.getNodeByPath(path));
    }
  }

  public static class PreviousActionListener extends EventListener<UITaxonomyTreeWorkingArea> {
    public void execute(Event<UITaxonomyTreeWorkingArea> event) throws Exception {
      UITaxonomyTreeContainer uiTaxonomyTreeContainer = event.getSource().getAncestorOfType(UITaxonomyTreeContainer.class);
      UITaxonomyManagerTrees uiTaxonomyManagerTrees = uiTaxonomyTreeContainer.getAncestorOfType(UITaxonomyManagerTrees.class);
      TaxonomyTreeData taxonomyTreeData = uiTaxonomyTreeContainer.getTaxonomyTreeData();
      UIActionTaxonomyManager uiActionTaxonomyManager = uiTaxonomyTreeContainer.getChild(UIActionTaxonomyManager.class);
      UIActionForm uiActionForm = uiActionTaxonomyManager.getChild(UIActionForm.class);
      uiActionForm.createNewAction(null, TaxonomyTreeData.ACTION_TAXONOMY_TREE, true);
      uiActionForm.setWorkspace(taxonomyTreeData.getTaxoTreeWorkspace());
      uiTaxonomyTreeContainer.viewStep(3);
      event.getRequestContext().addUIComponentToUpdateByAjax(uiTaxonomyManagerTrees);
    }
  }

}
