/**
 * 
 */
package org.gcube.portlets.widgets.workspacesharingwidget.server.notifications;

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

import javax.servlet.http.HttpSession;

import org.gcube.common.homelibary.model.items.type.WorkspaceItemType;
import org.gcube.common.homelibrary.home.workspace.Workspace;
import org.gcube.common.homelibrary.home.workspace.WorkspaceItem;
import org.gcube.common.homelibrary.home.workspace.WorkspaceSharedFolder;
import org.gcube.portlets.widgets.workspacesharingwidget.server.GWTWorkspaceSharingBuilder;
import org.gcube.portlets.widgets.workspacesharingwidget.server.util.WsUtil;
import org.gcube.portlets.widgets.workspacesharingwidget.shared.InfoContactModel;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author Francesco Mangiacrapa francesco.mangiacrapa@isti.cnr.it
 * @May 27, 2013
 *
 */
public class NotificationsUtil {
	
	
	protected static Logger logger = LoggerFactory.getLogger(NotificationsUtil.class);
	
	/**
	 * Send a notification if an item is added or updated to sharing folder
	 * @param httpSession
	 * @param sourceItem
	 * @param sourceSharedId
	 * @param folderDestinationItem
	 */
	public static void checkSendNotifyChangedItemToShare(HttpSession httpSession, final WorkspaceItem sourceItem, final String sourceSharedId, final WorkspaceItem folderDestinationItem, boolean isOverwrite) {
		
		logger.info("checkSendNotifyAddItemToShare");
		
		if(folderDestinationItem!=null){ 
				
			try{
				//if folder destination is shared folder
				if(folderDestinationItem.isShared()){ 	//Notify Added Item To Sharing?
					
					logger.info("checkNotifyAddItemToShare source item: "+sourceItem.getName()+" sourceSharedId: "+sourceSharedId + " folder destination: "+folderDestinationItem.getName() + " folder destination shared folder id: "+folderDestinationItem.getIdSharedFolder());
					
					//share condition is true if source shared folder is not null
					boolean shareChangeCondition = sourceSharedId==null?false:true;
				
					//System.out.println("shareChangeCondition add item: "+  shareChangeCondition);
				
					logger.info("shareChangeCondition add item: "+shareChangeCondition);
					
					//if shareChangeCondition is true.. notifies added item to sharing
					if(shareChangeCondition){  

						Workspace workspace = WsUtil.getWorkspace(httpSession);
						
						List<InfoContactModel> listContacts = getListUserSharedByFolderSharedId(workspace, folderDestinationItem.getIdSharedFolder());
						
						WorkspaceItem destinationSharedFolder = workspace.getItem(folderDestinationItem.getIdSharedFolder());

						NotificationsProducer np = new NotificationsProducer(WsUtil.getAslSession(httpSession));
						
						//SWITCH BEETWEEN ADDED OR UPDATED
						if(!isOverwrite)
							np.notifyAddedItemToSharing(listContacts, sourceItem, (WorkspaceSharedFolder) destinationSharedFolder);	
						else
							np.notifyUpdatedItemToSharing(listContacts, sourceItem, (WorkspaceSharedFolder) destinationSharedFolder);	
						
						
						logger.info("The notifies was sent correctly");
//							np.notifyAddedItemToSharing(listContacts, (WorkspaceFolder) folderDestinationItem);	
					}	
				}
				else
					logger.info("folder destination is not shared");
			
			}catch (Exception e) {
				logger.error("An error occurred in  checkSendNotifyAddItemToShare ",e);
			}
		}else
			logger.warn("The notifies is failure in checkSendNotifyAddItemToShare because folder destination item is null");	
	}
	
	
	/**
	 * 
	 * @param workspace
	 * @param idSharedFolder
	 * @return
	 * @throws Exception
	 */
	public static List<InfoContactModel> getListUserSharedByFolderSharedId(Workspace workspace, String idSharedFolder) throws Exception {
		
		logger.info("getListUserSharedByFolderSharedId "+ idSharedFolder);

		try {

			WorkspaceItem wsItem = workspace.getItem(idSharedFolder);
			
			if(isARootSharedFolder(wsItem)){
				
				WorkspaceSharedFolder wsFolder = (WorkspaceSharedFolder) wsItem;

				GWTWorkspaceSharingBuilder builder = new GWTWorkspaceSharingBuilder();

				List<String> listPortalLogin = wsFolder.getUsers();

				logger.info("getListUserSharedByFolderSharedId return "+ listPortalLogin.size() + " user");

				return builder.buildGxtInfoContactsFromPortalLogins(listPortalLogin);
				
			}
			else{
				logger.info("the item with id: "+idSharedFolder+ " is not  "+WorkspaceItemType.SHARED_FOLDER);
				
				//DEBUG
				//System.out.println("the item with id: "+folderSharedId+ " is not  "+WorkspaceItemType.SHARED_FOLDER);
			}
			return new ArrayList<InfoContactModel>();
		
		} catch (Exception e) {
			logger.error("Error in getListUserSharedByItemId ", e);
			throw new Exception(e.getMessage());
		}
	}



	
	/**
	 * 
	 * @param httpSession
	 * @param sourceItemIsShared
	 * @param oldItemName
	 * @param oldItemId
	 * @param sourceFolderSharedId
	 */
	public static void checkSendNotifyRemoveItemToShare(HttpSession httpSession, final boolean sourceItemIsShared, final String oldItemName, String oldItemId, final String sourceFolderSharedId) {
		
		
		logger.info("checkNotifyRemoveItemToShare:");
		
		try{
			
			if(!sourceItemIsShared){	
				
				logger.info("checkSendNotifyRemoveItemToShare returned, source item is not shared");
				return;
			}

			String idSharedFolder = sourceFolderSharedId!=null?sourceFolderSharedId:"";
			
//				System.out.println("shareChangeCondition remove item: "+  shareChangeCondition);
			

			boolean isRootFolderShared = checkIsRootFolderShared(oldItemId, idSharedFolder);
			logger.info("isRootFolderShared is: "+  isRootFolderShared);
			
			if(isRootFolderShared){
				logger.info("Notification doesn't send because the event is on root shared folder");
				return;
			}
			
			
			boolean isSharedFolder = isASharedFolderForId(httpSession,idSharedFolder);
			
			logger.info("idSharedFolder is: "+  idSharedFolder +" is shared folder: "+isSharedFolder);
			
			
			//Notify Removed Item To Sharing?
			if(isSharedFolder && !isRootFolderShared){
					
				Workspace workspace = WsUtil.getWorkspace(httpSession);
			
				//get contacts
				List<InfoContactModel> listContacts = getListUserSharedByFolderSharedId(workspace, idSharedFolder);
				
				WorkspaceItem sourceSharedFolder = workspace.getItem(idSharedFolder);
				
				//System.out.println(" name sourceSharedFolder:  "+ sourceSharedFolder.getName());
				
				NotificationsProducer np = new NotificationsProducer(WsUtil.getAslSession(httpSession));
				
				if(sourceSharedFolder instanceof WorkspaceSharedFolder)
					np.notifyRemovedItemToSharing(listContacts, oldItemName, (WorkspaceSharedFolder) sourceSharedFolder);
				else
					logger.info("Source shared folder "+sourceSharedFolder + " is not instanceof WorkspaceSharedFolder, skipping");
				
				logger.info("The notifies was sent correctly");
					
			}
			
		}catch (Exception e) {
			logger.error("An error occurred in checkSendNotifyRemoveItemToShare ",e);
		}

	}
	
	/**
	 * 
	 * @param wsItem
	 * @return
	 */
	public static boolean isARootSharedFolder(WorkspaceItem wsItem){
		if(wsItem!=null)
			return wsItem.getType().equals(WorkspaceItemType.SHARED_FOLDER);
		return false;
	}
	
	/**
	 * 
	 * @param wsItem
	 * @return
	 */
	public static boolean isASharedFolderForId(HttpSession httpSession, String itemId){
		
		if(itemId==null || itemId.isEmpty())
			return false;
		
		try {
			
			Workspace workspace = WsUtil.getWorkspace(httpSession);

			WorkspaceItem wsItem = workspace.getItem(itemId);
		
			if(wsItem!=null)
				return wsItem.getType().equals(WorkspaceItemType.SHARED_FOLDER);
			return false;
		
		} catch (Exception e) {
			logger.error("An errror occurred in isASharedFolderForId", e);
			return false;
		}
	}
	

	/**
	 * 
	 * @param itemId
	 * @param rootFolderSharedId
	 * @return
	 */
	public static boolean checkIsRootFolderShared(String itemId, String rootFolderSharedId) {
		
		logger.info("checkIsRootFolderShared between [itemid: "+itemId +",  rootFolderSharedId: "+rootFolderSharedId+"]");
		if(itemId==null)
			return false;
		
		if(rootFolderSharedId==null)
			return false;
		
		if(itemId.compareTo(rootFolderSharedId)==0)
			return true;
		
		return false;
	}
}