/*
 * Copyright (C) 2003-2008 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.search;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.List;
import java.util.Locale;
import java.util.regex.Matcher;

import javax.jcr.AccessDeniedException;
import javax.jcr.Node;
import javax.jcr.NodeIterator;
import javax.jcr.PathNotFoundException;
import javax.jcr.Session;
import javax.jcr.lock.LockException;
import javax.jcr.query.Query;
import javax.jcr.query.QueryManager;
import javax.jcr.query.QueryResult;

import org.exoplatform.services.log.Log;
import org.exoplatform.commons.utils.ObjectPageList;
import org.exoplatform.commons.utils.PageList;
import org.exoplatform.ecm.webui.component.explorer.UIJCRExplorer;
import org.exoplatform.ecm.webui.component.explorer.UIWorkingArea;
import org.exoplatform.ecm.webui.utils.JCRExceptionManager;
import org.exoplatform.ecm.webui.utils.PermissionUtil;
import org.exoplatform.ecm.webui.utils.Utils;
import org.exoplatform.portal.webui.util.Util;
import org.exoplatform.portal.webui.workspace.UIPortalApplication;
import org.exoplatform.services.cms.templates.TemplateService;
import org.exoplatform.services.log.ExoLogger;
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.UIComponentDecorator;
import org.exoplatform.webui.core.UIPageIterator;
import org.exoplatform.webui.core.UIPopupWindow;
import org.exoplatform.webui.event.Event;
import org.exoplatform.webui.event.EventListener;

/**
 * Created by The eXo Platform SARL
 * Author : Nguyen Anh Vu
 *          anhvurz90@gmail.com
 * Oct 22, 2009  
 * 2:44:09 PM
 */
@ComponentConfig(
		template = "app:/groovy/webui/component/explorer/search/UIShowAllHiddenResult.gtmpl", 
		events = {	@EventConfig(listeners = UIShowAllHiddenResult.ViewActionListener.class),
					@EventConfig(listeners = UIShowAllHiddenResult.RemoveHiddenAttributeActionListener.class),
					@EventConfig(listeners = UIShowAllHiddenResult.SortASCActionListener.class),
					@EventConfig(listeners = UIShowAllHiddenResult.SortDESCActionListener.class)})
public class UIShowAllHiddenResult extends UIComponentDecorator {
	
	private static final Log LOG  = ExoLogger.getLogger("explorer.search.UIShowAllHiddenResult");
	private static final int FILE_PER_PAGE = 10;
	private static String iconType = "BlueDownArrow";
	private static String iconName = "";
	private long searchTime_ = 0;
	private List<Node> hiddenNodes_ = new ArrayList<Node>();
	private UIPageIterator uiPageIterator_ ;
	private boolean nodeListChange = false;
	
	public UIShowAllHiddenResult() throws Exception {
		uiPageIterator_ = createUIComponent(UIPageIterator.class, null, "UIShowAllHiddenIterator");
		setUIComponent(uiPageIterator_);
	}
	
	public DateFormat getSimpleDateFormat() {
		Locale locale = Util.getUIPortal().getAncestorOfType(UIPortalApplication.class).getLocale();
	    return SimpleDateFormat.getDateTimeInstance(SimpleDateFormat.SHORT, SimpleDateFormat.SHORT, locale);
	}
	
	public long getSearchTime() { return searchTime_; }
	public void setSearchTime(long time) { this.searchTime_ = time; }  
	public UIPageIterator  getUIPageIterator() {  return uiPageIterator_ ; }
	
	public Date getDateCreated(Node node) throws Exception{
	    if (node.hasProperty("exo:dateCreated")) {
	      return node.getProperty("exo:dateCreated").getDate().getTime();
	    }
	    return new GregorianCalendar().getTime();
	}	

	@SuppressWarnings("unchecked")
	public List<Node> getAllHiddenNodes() throws Exception {
		//return HiddenNodes_;
		return (List<Node>)uiPageIterator_.getCurrentPageData();
	}
	
	protected List<Node> getNewHiddenNodeList() throws Exception {
		List<Node> ret = new ArrayList<Node>();
		UIJCRExplorer uiExplorer = getAncestorOfType(UIJCRExplorer.class);
    boolean byUser = uiExplorer.getPreference().isShowItemsByUser();		
		
		StringBuilder queryString	= new StringBuilder("SELECT * FROM ")
																		.append(Utils.EXO_HIDDENABLE);
		if (byUser) {
			queryString.append(" WHERE CONTAINS(").
									append(Utils.EXO_OWNER).
									append(",'").
									append(uiExplorer.getSession().getUserID()).
									append("')");
		}
		Session session = uiExplorer.getSession();
  	QueryManager queryManager = session.getWorkspace().getQueryManager();
  	Query query = queryManager.createQuery(queryString.toString(), Query.SQL);
  	QueryResult queryResult = query.execute();
  	
  	NodeIterator iter = queryResult.getNodes();
  	while (iter.hasNext()) {
  		ret.add(iter.nextNode());
  	}

		return ret;
	}
	
	public void updateList() throws Exception {
		List<Node> nodeList = getNewHiddenNodeList();
		PageList pageList = new ObjectPageList(nodeList, FILE_PER_PAGE);
		uiPageIterator_.setPageList(pageList);
		hiddenNodes_ = nodeList;
	}
	
	private void updateTable(Event<UIShowAllHiddenResult> event) throws Exception {
		int currentPage = uiPageIterator_.getCurrentPage();
		if (nodeListChange) {
			updateList();
			nodeListChange = false;
		}
		Collections.sort(hiddenNodes_, new SearchComparator());
		PageList pageList = new ObjectPageList(hiddenNodes_, FILE_PER_PAGE);
		
		UIPageIterator uiPageIterator = uiPageIterator_;
		uiPageIterator.setPageList(pageList);
		uiPageIterator.setPageList(pageList);
		if (uiPageIterator.getAvailablePage() >= currentPage)
			uiPageIterator.setCurrentPage(currentPage);
		else {
			uiPageIterator.setCurrentPage(
				uiPageIterator.getAvailablePage());
		}
		event.getRequestContext().addUIComponentToUpdateByAjax(this.getParent());
	}

	public static class SortASCActionListener extends
			EventListener<UIShowAllHiddenResult> {
		@Override
		public void execute(Event<UIShowAllHiddenResult> event) throws Exception {
			UIShowAllHiddenResult uiShowAllHiddenResult
					= event.getSource();
			String objectId = event.getRequestContext().getRequestParameter(OBJECTID);
			if (objectId.equals("type")) {
				iconType = "BlueDownArrow";
				iconName = "";
			} else if (objectId.equals("name")) {
				iconType = "";
				iconName = "BlueDownArrow";
			}
			uiShowAllHiddenResult.updateTable(event);
		}
	}

	public static class SortDESCActionListener extends
			EventListener<UIShowAllHiddenResult> {
		@Override
		public void execute(Event<UIShowAllHiddenResult> event) throws Exception {
			UIShowAllHiddenResult uiShowAllHiddenResult
					= event.getSource();
			String objectId = event.getRequestContext().getRequestParameter(OBJECTID);
			if (objectId.equals("type")) {
				iconType = "BlueUpArrow";
				iconName = "";
			} else if (objectId.equals("name")) {
				iconType = "";
				iconName = "BlueUpArrow";
			}
			
			uiShowAllHiddenResult.updateTable(event);
		}
	}

	static  public class RemoveHiddenAttributeActionListener extends EventListener<UIShowAllHiddenResult> {
	    public void execute(Event<UIShowAllHiddenResult> event) throws Exception {
	        //final String virtualNodePath = nodePath;
	        String srcPath = event.getRequestContext().getRequestParameter(OBJECTID);
	        UIShowAllHiddenResult uiShowAllHiddenResult = event.getSource();
	        UIJCRExplorer uiExplorer = uiShowAllHiddenResult.getAncestorOfType(UIJCRExplorer.class);
		    UIApplication uiApp = uiShowAllHiddenResult.getAncestorOfType(UIApplication.class);
		    
		    Matcher matcher = UIWorkingArea.FILE_EXPLORER_URL_SYNTAX.matcher(srcPath);
		    String wsName = null;
		    Node node = null;
		    if (matcher.find()) {
		      wsName = matcher.group(1);
		      srcPath = matcher.group(2);
		    } else {
		      throw new IllegalArgumentException("The ObjectId is invalid '"+ srcPath + "'");
		    }

		    Session session = uiExplorer.getSessionByWorkspace(wsName);
		    try {
		      // Use the method getNodeByPath because it is link aware
		      node = uiExplorer.getNodeByPath(srcPath, session, false);
		      // Reset the path to manage the links that potentially create virtual path
		      //srcPath = node.getPath();
		      // Reset the session to manage the links that potentially change of workspace
		      session = node.getSession();
		      // Reset the workspace name to manage the links that potentially change of workspace 
		      //wsName = session.getWorkspace().getName();
		    } catch(PathNotFoundException path) {
		      uiApp.addMessage(new ApplicationMessage("UIPopupMenu.msg.path-not-found-exception", 
		          null,ApplicationMessage.WARNING));
		      event.getRequestContext().addUIComponentToUpdateByAjax(uiApp.getUIPopupMessages());
		      return;
		    }

		    try {
		      uiExplorer.addLockToken(node);
		    } catch (Exception e) {
		      JCRExceptionManager.process(uiApp, e);
		      return;
		    }
		    
        try {
          if (PermissionUtil.canRemoveNode(node)) {
	          uiShowAllHiddenResult.nodeListChange = true;
	          node.removeMixin(Utils.EXO_HIDDENABLE);
	          node.save();
	    	  uiShowAllHiddenResult.updateTable(event);
          } else {
        	  throw new AccessDeniedException();
          }
  	    } catch (LockException e) {
  	    	LOG.error("node is locked, can't remove hidden property of node :" + node.getPath());
  	    	JCRExceptionManager.process(uiApp, e);
  	    	event.getRequestContext().addUIComponentToUpdateByAjax(uiApp.getUIPopupMessages());
  	    	uiExplorer.updateAjax(event);
		    } catch (AccessDeniedException e) {
		    	LOG.error("Access denied! No permission for modifying property " +
		    			  Utils.EXO_HIDDENABLE + " of node: " + node.getPath());
		    	uiApp.addMessage(new ApplicationMessage("UIShowAllHiddenResult.msg.accessDenied", null, ApplicationMessage.WARNING));
		    	event.getRequestContext().addUIComponentToUpdateByAjax(uiApp.getUIPopupMessages());
	        } catch (Exception e) {
	          LOG.error("an unexpected error occurs while removing the node", e);
	          JCRExceptionManager.process(uiApp, e);
	          event.getRequestContext().addUIComponentToUpdateByAjax(uiApp.getUIPopupMessages());
	          return;
	        }
	    }
	}

	static  public class ViewActionListener extends EventListener<UIShowAllHiddenResult> {
	    public void execute(Event<UIShowAllHiddenResult> event) throws Exception {
	      UIShowAllHiddenResult uiShowAllHiddenResult = event.getSource();            
	      UIJCRExplorer uiExplorer = uiShowAllHiddenResult.getAncestorOfType(UIJCRExplorer.class);
	      String repository = uiExplorer.getRepositoryName();
	      String path = event.getRequestContext().getRequestParameter(OBJECTID);
	      UIApplication uiApp = uiShowAllHiddenResult.getAncestorOfType(UIApplication.class);
	      Node node;
	      try {
	        node = uiExplorer.getNodeByPath(path, uiExplorer.getTargetSession());
	      } catch(AccessDeniedException ace) {
	        uiApp.addMessage(new ApplicationMessage("UIShowAllHiddenResult.msg.access-denied", null, 
	                                                ApplicationMessage.WARNING));
	        event.getRequestContext().addUIComponentToUpdateByAjax(uiApp.getUIPopupMessages());
	        return;
	      }
	      TemplateService templateService = uiShowAllHiddenResult.getApplicationComponent(TemplateService.class);
	      if (!templateService.isManagedNodeType(node.getPrimaryNodeType().getName(), repository)) {
	        uiApp.addMessage(new ApplicationMessage("UIShowAllHiddenResult.msg.not-support", null, 
	                                                ApplicationMessage.WARNING));
	        event.getRequestContext().addUIComponentToUpdateByAjax(uiApp.getUIPopupMessages());
	        return;
	      }
	      UIPopupWindow uiPopup = uiExplorer.getChildById("ViewSearch");
	      if (uiPopup == null) {
	        uiPopup = uiExplorer.addChild(UIPopupWindow.class, null, "ViewSearch");
	      }
	      uiPopup.setResizable(true);
	      UIViewSearchResult uiViewSearch = uiPopup.createUIComponent(UIViewSearchResult.class, null, null);
	      uiViewSearch.setNode(node);

	      uiPopup.setWindowSize(600,750);
	      uiPopup.setUIComponent(uiViewSearch);
	      uiPopup.setRendered(true);
	      uiPopup.setShow(true);
	      return;
	    }
	}
	
	private static class SearchComparator implements Comparator<Node> {
	    public int compare(Node node1, Node node2) {
	      try {
	        if (iconType.equals("BlueUpArrow") || iconType.equals("BlueDownArrow")) {
	          String s1 = node1.getProperty("jcr:primaryType").getString();
	          String s2 = node2.getProperty("jcr:primaryType").getString();
	          if (iconType.trim().equals("BlueUpArrow")) { return s2.compareTo(s1); }        
	          return s1.compareTo(s2);
	        } else if (iconName.equals("BlueUpArrow") || iconName.equals("BlueDownArrow")) {
	          String name1 = node1.getName();
	          String name2 = node2.getName();
	          if (iconName.trim().equals("BlueUpArrow")) { return name2.compareTo(name1); }        
	          return name1.compareTo(name2);
	        }
	      } catch (Exception e) {
	        LOG.error("Cannot compare nodes", e);
	      }            
	      return 0;
	    }        
	}	
	
}
