/*
 * 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.tree.selectone;

import java.util.ArrayList;
import java.util.List;
import java.util.MissingResourceException;
import java.util.ResourceBundle;

import javax.jcr.AccessDeniedException;
import javax.jcr.Node;
import javax.jcr.RepositoryException;

import org.exoplatform.ecm.webui.form.UIFormInputSetWithAction;
import org.exoplatform.ecm.webui.selector.UISelectable;
import org.exoplatform.ecm.webui.tree.UIBaseNodeTreeSelector;
import org.exoplatform.ecm.webui.tree.UITreeTaxonomyBuilder;
import org.exoplatform.portal.webui.util.Util;
import org.exoplatform.services.cms.taxonomy.TaxonomyService;
import org.exoplatform.services.jcr.RepositoryService;
import org.exoplatform.services.jcr.core.ManageableRepository;
import org.exoplatform.services.jcr.ext.common.SessionProvider;
import org.exoplatform.services.log.ExoLogger;
import org.exoplatform.services.log.Log;
import org.exoplatform.services.wcm.utils.WCMCoreUtils;
import org.exoplatform.web.application.ApplicationMessage;
import org.exoplatform.web.application.RequestContext;
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.UIBreadcumbs;
import org.exoplatform.webui.core.UIComponent;
import org.exoplatform.webui.core.UIPopupWindow;
import org.exoplatform.webui.core.lifecycle.UIFormLifecycle;
import org.exoplatform.webui.core.model.SelectItemOption;
import org.exoplatform.webui.event.Event;
import org.exoplatform.webui.event.EventListener;
import org.exoplatform.webui.form.UIForm;
import org.exoplatform.webui.form.UIFormInputInfo;
import org.exoplatform.webui.form.UIFormSelectBox;

/**
 * Created by The eXo Platform SARL
 * Author : Dang Van Minh
 *          minh.dang@exoplatform.com
 * Jun 21, 2007 2:32:49 PM
 */
@ComponentConfig(
    lifecycle = UIFormLifecycle.class,
    template = "classpath:groovy/ecm/webui/form/UIFormWithoutAction.gtmpl",
    events = {
      @EventConfig(listeners = UITreeTaxonomyList.ChangeTaxonomyTreeActionListener.class),
      @EventConfig(listeners = UITreeTaxonomyList.AddRootNodeActionListener.class)
    }
)
public class UITreeTaxonomyList extends UIForm {

  static private String ROOT_NODE_INFO = "rootNodeInfo";
  static private String ROOT_NODE_PATH = "rootNodePath";
  public static String TAXONOMY_TREE = "taxonomyTree";
  private static final Log LOG  = ExoLogger.getLogger(UITreeTaxonomyList.class.getName());
  private boolean isShowSystem_ = true;

  public UITreeTaxonomyList() throws Exception {
    List<SelectItemOption<String>> taxonomyTreeList = new ArrayList<SelectItemOption<String>>();
    UIFormSelectBox uiTaxonomyTreeList = new UIFormSelectBox(TAXONOMY_TREE, TAXONOMY_TREE, taxonomyTreeList);
    uiTaxonomyTreeList.setOnChange("ChangeTaxonomyTree");
    addUIFormInput(uiTaxonomyTreeList);

    UIFormInputSetWithAction rootNodeInfo = new UIFormInputSetWithAction(ROOT_NODE_INFO);
    rootNodeInfo.addUIFormInput(new UIFormInputInfo(ROOT_NODE_PATH, ROOT_NODE_PATH, null));
    String[] actionInfor = {"AddRootNode"};
    rootNodeInfo.setActionInfo(ROOT_NODE_PATH, actionInfor);
    rootNodeInfo.showActionInfo(true);
    rootNodeInfo.setRendered(true);
    addUIComponentInput(rootNodeInfo);
  }

  public void setIsShowSystem(boolean isShowSystem) { isShowSystem_ = isShowSystem; }

  public boolean isShowSystemWorkspace() { return isShowSystem_; }

  public void setShowRootPathSelect(boolean isRender) {
    UIFormInputSetWithAction uiInputAction = getChildById(ROOT_NODE_INFO);
    uiInputAction.setRendered(isRender);
  }

  private String getTaxonomyLabel(String taxonomyTree) {
    String display = taxonomyTree;
    RequestContext context = Util.getPortalRequestContext();
    ResourceBundle res = context.getApplicationResourceBundle();
    try {
      return res.getString(("eXoTaxonomies.").concat(taxonomyTree).concat(".label"));
    } catch (MissingResourceException me) {
      return display;
    }
  }
  
  public void setTaxonomyTreeList() throws Exception {
    TaxonomyService taxonomyService = getApplicationComponent(TaxonomyService.class);
    List<Node> listNode = taxonomyService.getAllTaxonomyTrees();
    List<SelectItemOption<String>> taxonomyTree = new ArrayList<SelectItemOption<String>>();
    for(Node itemNode : listNode) {
      taxonomyTree.add(new SelectItemOption<String>(getTaxonomyLabel(itemNode.getName()), itemNode.getName()));
    }
    UIFormSelectBox uiTreeTaxonomyList = getUIFormSelectBox(TAXONOMY_TREE);
    uiTreeTaxonomyList.setOptions(taxonomyTree);
  }  

  private Node getRootNode(String workspaceName, String pathNode) throws RepositoryException {
    RepositoryService repositoryService = getApplicationComponent(RepositoryService.class);
    ManageableRepository manageableRepository = repositoryService.getCurrentRepository();
    SessionProvider sessionProvider = WCMCoreUtils.getUserSessionProvider();
    return (Node) sessionProvider.getSession(workspaceName, manageableRepository).getItem(pathNode);
  }

  static public class ChangeTaxonomyTreeActionListener extends EventListener<UITreeTaxonomyList> {
    public void execute(Event<UITreeTaxonomyList> event) throws Exception {
      UITreeTaxonomyList uiTreeTaxonomyList = event.getSource();
      UIOneTaxonomySelector uiOneTaxonomySelector = uiTreeTaxonomyList.getParent();
      String taxoTreeName = uiTreeTaxonomyList.getUIFormSelectBox(TAXONOMY_TREE).getValue();
      Node taxoTreeNode = uiOneTaxonomySelector.getTaxoTreeNode(taxoTreeName);
      String workspaceName = taxoTreeNode.getSession().getWorkspace().getName();
      String pathTaxonomy = taxoTreeNode.getPath();
      UIApplication uiApp = uiTreeTaxonomyList.getAncestorOfType(UIApplication.class);
      if (taxoTreeNode.hasNodes()) {
        uiOneTaxonomySelector.setWorkspaceName(workspaceName);
        uiOneTaxonomySelector.setRootTaxonomyName(taxoTreeNode.getName());
        uiOneTaxonomySelector.setRootTreePath(taxoTreeNode.getPath());
        UIBreadcumbs uiBreadcumbs = uiOneTaxonomySelector.getChildById("BreadcumbOneTaxonomy");
        uiBreadcumbs.getPath().clear();
        UITreeTaxonomyBuilder uiTreeJCRExplorer = uiOneTaxonomySelector.getChild(UITreeTaxonomyBuilder.class);
        try {
          uiTreeJCRExplorer.setRootTreeNode(uiTreeTaxonomyList.getRootNode(workspaceName, pathTaxonomy));
          uiTreeJCRExplorer.buildTree();
        } catch (AccessDeniedException ade) {
          UIFormSelectBox uiTaxonomyTree = uiTreeTaxonomyList.getUIFormSelectBox(TAXONOMY_TREE);
          List<SelectItemOption<String>> taxonomyTree = uiTaxonomyTree.getOptions();
          if (taxonomyTree != null && taxonomyTree.size() > 0)
            uiTaxonomyTree.setValue(taxonomyTree.get(0).getValue());

          uiApp.addMessage(new ApplicationMessage("UIWorkspaceList.msg.AccessDeniedException", null, ApplicationMessage.WARNING));
          event.getRequestContext().addUIComponentToUpdateByAjax(uiTaxonomyTree.getParent());
          return;
        } catch(Exception e) {
          if (LOG.isErrorEnabled()) {
            LOG.error("Unexpected error", e);
          }
          return;
        }
      } else {
        UIFormSelectBox uiTaxonomyTree = uiTreeTaxonomyList.getUIFormSelectBox(TAXONOMY_TREE);
        List<SelectItemOption<String>> taxonomyTree = uiTaxonomyTree.getOptions();
        if (taxonomyTree != null && taxonomyTree.size() > 0)
          uiTaxonomyTree.setValue(taxonomyTree.get(0).getValue());
        uiApp.addMessage(new ApplicationMessage("UITreeTaxonomyList.msg.NoChild", null, ApplicationMessage.WARNING));
        return;
      }
      event.getRequestContext().addUIComponentToUpdateByAjax(uiOneTaxonomySelector);
    }
  }

  static public class AddRootNodeActionListener extends EventListener<UITreeTaxonomyList> {
    public void execute(Event<UITreeTaxonomyList> event) throws Exception {
      UITreeTaxonomyList uiTreeTaxonomyList = event.getSource();
      String taxoTreeName = uiTreeTaxonomyList.getUIFormSelectBox(TAXONOMY_TREE).getValue();
      UIOneTaxonomySelector uiTaxonomySelector = uiTreeTaxonomyList.getParent();
      String returnField = ((UIBaseNodeTreeSelector) uiTaxonomySelector).getReturnFieldName();
      ((UISelectable)((UIBaseNodeTreeSelector) uiTaxonomySelector).getSourceComponent()).doSelect(returnField, taxoTreeName) ;
      UIComponent uiComponent = uiTaxonomySelector.getParent();
      if (uiComponent instanceof UIPopupWindow) {
        ((UIPopupWindow)uiComponent).setShow(false);
        ((UIPopupWindow)uiComponent).setRendered(false);
        event.getRequestContext().addUIComponentToUpdateByAjax(uiComponent);
      }
      UIComponent component = uiTaxonomySelector.getSourceComponent().getParent();
      if (component != null) {
        event.getRequestContext().addUIComponentToUpdateByAjax(component);
      }
    }
  }
}
