/*
 * 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.explorer.popup.actions;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.ResourceBundle;
import java.util.Set;

import javax.jcr.Node;

import org.exoplatform.container.ExoContainer;
import org.exoplatform.container.ExoContainerContext;
import org.exoplatform.ecm.jcr.model.Preference;
import org.exoplatform.ecm.webui.component.explorer.UIJCRExplorer;
import org.exoplatform.ecm.webui.component.explorer.sidebar.UISideBar;
import org.exoplatform.ecm.webui.form.UIFormInputSetWithAction;
import org.exoplatform.ecm.webui.utils.Utils;
import org.exoplatform.portal.webui.util.SessionProviderFactory;
import org.exoplatform.services.cms.folksonomy.NewFolksonomyService;
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.jcr.ext.hierarchy.NodeHierarchyCreator;
import org.exoplatform.web.application.ApplicationMessage;
import org.exoplatform.web.application.RequestContext;
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.UIApplication;
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.event.Event.Phase;
import org.exoplatform.webui.form.UIForm;
import org.exoplatform.webui.form.UIFormInputInfo;
import org.exoplatform.webui.form.UIFormSelectBox;
import org.exoplatform.webui.form.UIFormStringInput;
import org.exoplatform.webui.form.UIFormTextAreaInput;

/**
 * Created by The eXo Platform SARL
 * Author : Dang Van Minh
 *          minh.dang@exoplatform.com
 * Jan 12, 2007  
 * 11:56:51 AM
 */
@ComponentConfig(
    lifecycle = UIFormLifecycle.class,
    template = "system:/groovy/webui/form/UIForm.gtmpl",
    events = {
      @EventConfig(listeners = UITaggingForm.AddTagActionListener.class),
      @EventConfig(listeners = UITaggingForm.EditActionListener.class, phase = Phase.DECODE),      
      @EventConfig(listeners = UITaggingForm.RemoveActionListener.class, phase = Phase.DECODE),
      @EventConfig(listeners = UITaggingForm.CancelActionListener.class, phase = Phase.DECODE),
      @EventConfig(listeners = UITaggingForm.ChangeActionListener.class, phase = Phase.DECODE)      
    }
)
public class UITaggingForm extends UIForm {
  
	final static public String TAG_NAME_LIST = "tagNameList";  
  final static public String TAG_NAMES = "names";
  final static public String TAG_SCOPES = "tagScopes";
  final static public String SCOPE_VALUES = "scopeValues"; 
  final static public String LINKED_TAGS = "linked";
  final static public String LINKED_TAGS_SET = "tagSet";
  final static public String TAG_STATUS_PROP = "exo:tagStatus".intern();  
  final static public String TAG_NAME_ACTION = "tagNameAct".intern();
  final static public String ASCENDING_ORDER = "Ascending".intern();
	private static final String USER_FOLKSONOMY_ALIAS = "userPrivateFolksonomy".intern();
	private static final String GROUP_FOLKSONOMY_ALIAS = "folksonomy".intern();
	private static final String GROUPS_ALIAS = "groupsPath".intern();
	
  final static public String PUBLIC_TAG_NODE_PATH = "exoPublicTagNode";
  
  String[] groups;
  String[] users;
  
  public UITaggingForm() throws Exception {
    UIFormInputSetWithActionForTaggingForm uiInputSet = new UIFormInputSetWithActionForTaggingForm(LINKED_TAGS_SET);
    uiInputSet.addUIFormInput(new UIFormStringInput(TAG_NAMES, TAG_NAMES, null));
		uiInputSet.addUIFormInput(new UIFormTextAreaInput(TAG_NAME_LIST, TAG_NAME_LIST, null));
    
    RequestContext context = RequestContext.getCurrentInstance();
    ResourceBundle res = context.getApplicationResourceBundle();
    List<SelectItemOption<String>> tagScopes = new ArrayList<SelectItemOption<String>>();
    tagScopes.add(new SelectItemOption<String>(res.getString("UITaggingForm.label." + Utils.PRIVATE), Utils.PRIVATE));    
    tagScopes.add(new SelectItemOption<String>(res.getString("UITaggingForm.label." + Utils.PUBLIC), Utils.PUBLIC));
    /* Disable Group and Site tag
    tagScopes.add(new SelectItemOption<String>(res.getString("UITaggingForm.label." + Utils.GROUP), Utils.GROUP));
    tagScopes.add(new SelectItemOption<String>(res.getString("UITaggingForm.label." + Utils.SITE), Utils.SITE));
    */
    UIFormSelectBox box = new UIFormSelectBox(TAG_SCOPES, TAG_SCOPES, tagScopes);
    box.setOnChange("Change");
    uiInputSet.addUIFormInput(box);
    box.setSelectedValues(new String[] {Utils.PRIVATE});
    
    uiInputSet.addUIFormInput(new UIFormInputInfo(LINKED_TAGS, LINKED_TAGS, null));
    uiInputSet.setIntroduction(TAG_NAMES, "UITaggingForm.introduction.tagName");
    addUIComponentInput(uiInputSet);
    uiInputSet.setIsView(false);
    super.setActions(new String[] {"AddTag", "Cancel"});
  }
  
  public void activate() throws Exception {
  	
  	ExoContainer container = ExoContainerContext.getCurrentContainer();  	
    String repository = getAncestorOfType(UIJCRExplorer.class).getRepositoryName();
		RepositoryService repositoryService	= (RepositoryService) 
								container.getComponentInstanceOfType(RepositoryService.class);
		ManageableRepository	manageableRepo = repositoryService.getRepository(repository);
    String workspace = manageableRepo.getConfiguration().getDefaultWorkspaceName();    
    NewFolksonomyService folksonomyService = getApplicationComponent(NewFolksonomyService.class);
    
    StringBuilder linkedTags = new StringBuilder();
    Set<String> linkedTagSet = new HashSet<String>();
    String tagScope = this.getUIFormSelectBox(TAG_SCOPES).getValue();
    
    Node currentNode = getAncestorOfType(UIJCRExplorer.class).getCurrentNode();
    for(Node tag : folksonomyService.getLinkedTagsOfDocumentByScope(getIntValue(tagScope),
    																												 getStrValue(tagScope, currentNode),
    																												 currentNode, 
    																												 repository, 
    																												 workspace)) {
    	linkedTagSet.add(tag.getName());
    }
    for (String tagName : linkedTagSet) {
    	if(linkedTags.length() > 0) linkedTags = linkedTags.append(",");
    	linkedTags.append(tagName);
    }
    
    UIFormInputSetWithAction uiLinkedInput = getChildById(LINKED_TAGS_SET);
    uiLinkedInput.setInfoField(LINKED_TAGS, linkedTags.toString());
    uiLinkedInput.setActionInfo(LINKED_TAGS, new String[] { "Edit", "Remove"});
    uiLinkedInput.setIsShowOnly(true);
    uiLinkedInput.setIsDeleteOnly(false);    
  }
  public void deActivate() throws Exception {}
  
  public int getIntValue(String scope) {
  	if (Utils.PUBLIC.equals(scope)) return NewFolksonomyService.PUBLIC;
  	else if (Utils.GROUP.equals(scope)) return NewFolksonomyService.GROUP;
  	else if (Utils.PRIVATE.equals(scope)) return NewFolksonomyService.PRIVATE;
  	return NewFolksonomyService.SITE;
  }
  
  public List<String> getAllTagNames() throws Exception {
  	ExoContainer container = ExoContainerContext.getCurrentContainer();  	
    String repository = getAncestorOfType(UIJCRExplorer.class).getRepositoryName();
		RepositoryService repositoryService	= (RepositoryService) 
								container.getComponentInstanceOfType(RepositoryService.class);
		ManageableRepository	manageableRepo = repositoryService.getRepository(repository);
    String workspace = manageableRepo.getConfiguration().getDefaultWorkspaceName();    
    NewFolksonomyService folksonomyService = getApplicationComponent(NewFolksonomyService.class);

    String tagScope = this.getUIFormSelectBox(TAG_SCOPES).getValue();    
    Node currentNode = getAncestorOfType(UIJCRExplorer.class).getCurrentNode();
    
    return folksonomyService.getAllTagNames(repository, workspace, getIntValue(tagScope), getStrValue(tagScope, currentNode));
  }
  
  @Override
  public void processRender(WebuiRequestContext context) throws Exception {
    context.getJavascriptManager().importJavascript("eXo.ecm.ECMUtils","/ecm-wcm-extension/javascript/");
    context.getJavascriptManager().addJavascript("eXo.ecm.ECMUtils.disableAutocomplete('UITaggingForm');");
  	super.processRender(context);
  }
  
  private String getStrValue(String scope, Node node) throws Exception {
  	StringBuilder ret = new StringBuilder();
  	if (Utils.PRIVATE.equals(scope))
  		ret.append(node.getSession().getUserID());
  	else if (Utils.GROUP.equals(scope)) {
  		for (String group : Utils.getGroups())
  			ret.append(group).append(';');
  		ret.deleteCharAt(ret.length() - 1);
  	} else if (Utils.PUBLIC.equals(scope)) {
  		NodeHierarchyCreator nodeHierarchyCreator = getApplicationComponent(NodeHierarchyCreator.class);
			ret.append(nodeHierarchyCreator.getJcrPath(PUBLIC_TAG_NODE_PATH));
  	}
  	return ret.toString();
  }
  
  static public class AddTagActionListener extends EventListener<UITaggingForm> {
    public void execute(Event<UITaggingForm> event) throws Exception {
      UITaggingForm uiForm = event.getSource();
      UIApplication uiApp = uiForm.getAncestorOfType(UIApplication.class);
      String repository = uiForm.getAncestorOfType(UIJCRExplorer.class).getRepositoryName();
      String workspace = uiForm.getAncestorOfType(UIJCRExplorer.class).getRepository().getConfiguration().getDefaultWorkspaceName();
      String tagName = uiForm.getUIStringInput(TAG_NAMES).getValue();
      NewFolksonomyService newFolksonomyService = uiForm.getApplicationComponent(NewFolksonomyService.class);
      UIJCRExplorer uiExplorer = uiForm.getAncestorOfType(UIJCRExplorer.class);
      Node currentNode = uiExplorer.getCurrentNode();
      uiExplorer.addLockToken(currentNode);
      if(tagName == null || tagName.trim().length() == 0) {
        uiApp.addMessage(new ApplicationMessage("UITaggingForm.msg.tag-name-empty", null, 
            ApplicationMessage.WARNING));
        event.getRequestContext().addUIComponentToUpdateByAjax(uiApp.getUIPopupMessages());
        return;
      }
      String[] tagNames = null;
      if (tagName.indexOf(",") > -1) {
        tagNames = tagName.split(",");
        List<String> listTagNames = new ArrayList<String>(tagNames.length);
        List<String> listTagNamesClone = new ArrayList<String>(tagNames.length);
        for (String tName : tagNames) {
          listTagNames.add(tName.trim());          
          listTagNamesClone.add(tName.trim());
        }        
        for (int i = 0; i < listTagNames.size(); i++) {          
          String tag = listTagNames.get(i);
          listTagNamesClone.remove(tag);
          if (listTagNamesClone.contains(tag)) {
            uiApp.addMessage(new ApplicationMessage("UITaggingForm.msg.tag-name-duplicate", null, 
                ApplicationMessage.WARNING));
            event.getRequestContext().addUIComponentToUpdateByAjax(uiApp.getUIPopupMessages());
            return;
          }
          listTagNamesClone.add(tag);          
        }
      }
      else tagNames = new String[] {tagName};
      String[] fitlerTagNames = new String[tagNames.length];
      int i = 0;
      for(String t : tagNames) {
        fitlerTagNames[i] = tagNames[i].trim();
        i++;
        if(t.trim().length() == 0) {
          uiApp.addMessage(new ApplicationMessage("UITaggingForm.msg.tag-name-empty", null, 
              ApplicationMessage.WARNING));
          event.getRequestContext().addUIComponentToUpdateByAjax(uiApp.getUIPopupMessages());
          return;
        }
        if(t.trim().length() > 30) {
          uiApp.addMessage(new ApplicationMessage("UITaggingForm.msg.tagName-too-long", null, 
                                                  ApplicationMessage.WARNING));
          event.getRequestContext().addUIComponentToUpdateByAjax(uiApp.getUIPopupMessages());
          return;
        }
        String[] arrFilterChar = {"&", "'", "$", "@", ":","]", "[", "*", "%", "!", "/", "\\"};
        for(String filterChar : arrFilterChar) {
          if(t.indexOf(filterChar) > -1) {
            uiApp.addMessage(new ApplicationMessage("UITaggingForm.msg.tagName-invalid", null, 
                                                    ApplicationMessage.WARNING));
            event.getRequestContext().addUIComponentToUpdateByAjax(uiApp.getUIPopupMessages());
            return;
          }
        }
      }
      String tagScope = uiForm.getUIFormSelectBox(TAG_SCOPES).getValue();
      List<Node> tagList = newFolksonomyService.
      getLinkedTagsOfDocumentByScope(uiForm.getIntValue(tagScope),
					 													 uiForm.getStrValue(tagScope, currentNode),
      															 uiExplorer.getCurrentNode(), 
      															 repository, workspace);
      for(Node tag : tagList) {
        for(String t : fitlerTagNames) {
          if(t.equals(tag.getName())) {
            Object[] args = {t};
            uiApp.addMessage(new ApplicationMessage("UITaggingForm.msg.name-exist", args, 
                                                    ApplicationMessage.WARNING));
            event.getRequestContext().addUIComponentToUpdateByAjax(uiApp.getUIPopupMessages());
            return;
          }
        }
      }
//      String tagScope = uiForm.getChild(UIFormInputSetWithAction.class).getChild(UIFormSelectBox.class).getValue();
      addTagToNode(tagScope, currentNode, fitlerTagNames, repository, uiForm);
      uiForm.activate();
      
      Preference preferences = uiExplorer.getPreference();
      if (preferences.isShowSideBar()) {
        UISideBar uiSideBar = uiExplorer.findFirstComponentOfType(UISideBar.class);
        event.getRequestContext().addUIComponentToUpdateByAjax(uiSideBar);
      }
      uiForm.getUIStringInput(TAG_NAMES).setValue(null);
      event.getRequestContext().addUIComponentToUpdateByAjax(uiForm);
    }
    
    private void addTagToNode(String scope, Node currentNode, String[] tagNames, 
  			String repository, UITaggingForm uiForm) throws Exception {
    	
    	ExoContainer container = ExoContainerContext.getCurrentContainer();
      NewFolksonomyService newFolksonomyService = uiForm.getApplicationComponent(NewFolksonomyService.class);
  		RepositoryService repositoryService 
  		= (RepositoryService) container.getComponentInstanceOfType(RepositoryService.class);
  		ManageableRepository	manageableRepo = repositoryService.getRepository(repository);
      NodeHierarchyCreator nodeHierarchyCreator = uiForm.getApplicationComponent(NodeHierarchyCreator.class);
      String workspace = manageableRepo.getConfiguration().getDefaultWorkspaceName();
			String[] roles = Utils.getGroups().toArray(new String[]{});
			String publicTagNodePath = nodeHierarchyCreator.getJcrPath(PUBLIC_TAG_NODE_PATH);
						
      if (Utils.PUBLIC.equals(scope))
    		newFolksonomyService.addPublicTag(publicTagNodePath, tagNames, currentNode, repository, workspace);
//      else if (SITE.equals(scope))
//      	newFolksonomyService.addSiteTag(siteName, treePath, tagNames, currentNode, repository, workspace);
      else if (Utils.GROUP.equals(scope))
      	newFolksonomyService.addGroupsTag(tagNames, currentNode, repository, workspace, roles);
      else if (Utils.PRIVATE.equals(scope)) {
        String userName = currentNode.getSession().getUserID();      	
      	newFolksonomyService.addPrivateTag(tagNames, currentNode, repository, workspace, userName);
      }
    }
  }
  
  static public class CancelActionListener extends EventListener<UITaggingForm> {
    public void execute(Event<UITaggingForm> event) throws Exception {
      UIJCRExplorer uiExplorer = event.getSource().getAncestorOfType(UIJCRExplorer.class);
      uiExplorer.cancelAction();
    }
  }

  static public class RemoveActionListener extends EventListener<UITaggingForm> {
    public void execute(Event<UITaggingForm> event) throws Exception {
      UITaggingForm uiForm = event.getSource();
      UIJCRExplorer uiExplorer = uiForm.getAncestorOfType(UIJCRExplorer.class);      
      NewFolksonomyService newFolksonomyService = uiForm.getApplicationComponent(NewFolksonomyService.class);
      String tagScope = uiForm.getUIFormSelectBox(TAG_SCOPES).getValue();      
      List<String> memberships = Utils.getMemberships();
      if (!newFolksonomyService.canEditTag(uiForm.getIntValue(tagScope), memberships)) {
  			UIApplication uiApp = uiForm.getAncestorOfType(UIApplication.class);
        uiApp
        .addMessage(new ApplicationMessage(
            "UIPopupMenu.msg.editTagAccessDenied", null,
            ApplicationMessage.WARNING));
		    event.getRequestContext().addUIComponentToUpdateByAjax(uiApp.getUIPopupMessages());
		    return;
      }

      Node currentNode = uiExplorer.getCurrentNode();
      String tagName = event.getRequestContext().getRequestParameter(OBJECTID);
      String[] arrFilterChar = { "&", "'", "$", "@", ":", "]", "[", "*", "%", "!", "/", "\\" };
      UIApplication uiApp = uiForm.getAncestorOfType(UIApplication.class);
      if (!Utils.isNameValid(tagName, arrFilterChar)) {
        uiApp.addMessage(new ApplicationMessage("UITaggingForm.msg.tagName-invalid", null,
            ApplicationMessage.WARNING));
        event.getRequestContext().addUIComponentToUpdateByAjax(uiApp.getUIPopupMessages());
        return;
      }
      removeTagFromNode(tagScope, currentNode, tagName, uiForm);
      		//newFolksonomyService.removeTagOfDocument(currentNode, tagName, uiExplorer.getRepositoryName());
      uiForm.activate();

      Preference preferences = uiExplorer.getPreference();
      if (preferences.isShowSideBar()) {
        UISideBar uiSideBar = uiExplorer.findFirstComponentOfType(UISideBar.class);
        event.getRequestContext().addUIComponentToUpdateByAjax(uiSideBar);
      }
      event.getRequestContext().addUIComponentToUpdateByAjax(uiForm);
    }
    
    public void removeTagFromNode(String scope, Node currentNode, String tagName,
    													  	UITaggingForm uiForm) throws Exception {
    	
    	ExoContainer container = ExoContainerContext.getCurrentContainer();    	
    	NewFolksonomyService newFolksonomyService = uiForm.getApplicationComponent(NewFolksonomyService.class);
      NodeHierarchyCreator nodeHierarchyCreator = uiForm.getApplicationComponent(NodeHierarchyCreator.class);

      String repository = uiForm.getAncestorOfType(UIJCRExplorer.class).getRepositoryName();      
      String userName = currentNode.getSession().getUserID();
      
  		RepositoryService repositoryService 
  		= (RepositoryService) container.getComponentInstanceOfType(RepositoryService.class);
  		ManageableRepository	manageableRepo = repositoryService.getRepository(repository);
      String workspace = manageableRepo.getConfiguration().getDefaultWorkspaceName();      
    	
      String tagPath = "";
    	if (Utils.PUBLIC.equals(scope)) {
    		tagPath = nodeHierarchyCreator.getJcrPath(PUBLIC_TAG_NODE_PATH) + '/' + tagName;
    		newFolksonomyService.removeTagOfDocument(tagPath, currentNode, repository, workspace);    		
    	}
    	else if (Utils.PRIVATE.equals(scope)) {
    		Node userFolksonomyNode = getUserFolksonomyFolder(userName, uiForm);
      	tagPath = userFolksonomyNode.getNode(tagName).getPath();    		
      	newFolksonomyService.removeTagOfDocument(tagPath, currentNode, repository, workspace);      	
    	} else if (Utils.GROUP.equals(scope)) {
      	String groupsPath = nodeHierarchyCreator.getJcrPath(GROUPS_ALIAS);
      	String folksonomyPath = nodeHierarchyCreator.getJcrPath(GROUP_FOLKSONOMY_ALIAS);
      	Node groupsNode = getNode(repository, workspace, groupsPath);
      	for (String role : Utils.getGroups()) {
      		tagPath = groupsNode.getNode(role).getNode(folksonomyPath).getNode(tagName).getPath();
      		newFolksonomyService.removeTagOfDocument(tagPath, currentNode, repository, workspace);
      	}
    	}
    }
    
    private Node getNode(String repository, String workspace, String path) throws Exception {
      ExoContainer myContainer = ExoContainerContext.getCurrentContainer();  	
  		RepositoryService repositoryService 
  		= (RepositoryService) myContainer.getComponentInstanceOfType(RepositoryService.class);
  		ManageableRepository	manageableRepository = repositoryService.getRepository(repository);
    	SessionProvider sessionProvider = SessionProviderFactory.createSessionProvider();
    	return (Node) sessionProvider.getSession(workspace, manageableRepository).getItem(path);
    }
    
    private Node getUserFolksonomyFolder(String userName, UITaggingForm uiForm) throws Exception {
    	// code for running
      NodeHierarchyCreator nodeHierarchyCreator = uiForm.getApplicationComponent(NodeHierarchyCreator.class);    	
    	SessionProvider sessionProvider = SessionProviderFactory.createSessionProvider();
    	Node userNode = nodeHierarchyCreator.getUserNode(sessionProvider, userName);
    	String folksonomyPath = nodeHierarchyCreator.getJcrPath(USER_FOLKSONOMY_ALIAS);
    	return userNode.getNode(folksonomyPath);
    }
  }

  static public class ChangeActionListener extends EventListener<UITaggingForm> {
    public void execute(Event<UITaggingForm> event) throws Exception {
      UITaggingForm uiForm = event.getSource();
			uiForm.activate();      
    }
  }
  
  static public class EditActionListener extends EventListener<UITaggingForm> {
    public void execute(Event<UITaggingForm> event) throws Exception {
      UITaggingForm uiForm = event.getSource();
      NewFolksonomyService newFolksonomyService = uiForm.getApplicationComponent(NewFolksonomyService.class);
      String tagScope = uiForm.getUIFormSelectBox(TAG_SCOPES).getValue();      
      List<String> memberships = Utils.getMemberships();
      if (!newFolksonomyService.canEditTag(uiForm.getIntValue(tagScope), memberships)) {
  			UIApplication uiApp = uiForm.getAncestorOfType(UIApplication.class);
        uiApp
        .addMessage(new ApplicationMessage(
            "UIPopupMenu.msg.editTagAccessDenied", null,
            ApplicationMessage.WARNING));
		    event.getRequestContext().addUIComponentToUpdateByAjax(uiApp.getUIPopupMessages());
		    return;
      }
			((UITaggingFormContainer)uiForm.getParent()).edit(event);
    }
  }
  
  
}
