package org.gcube.portlets.widgets.pickitem.server;


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

import org.gcube.portlets.widgets.pickitem.client.rpc.PickItemService;
import org.gcube.portlets.widgets.pickitem.shared.ItemBean;
import org.gcube.vomanagement.usermanagement.exception.UserManagementSystemException;
import org.gcube.vomanagement.usermanagement.exception.UserRetrievalFault;
import org.gcube.vomanagement.usermanagement.impl.LiferayUserManager;
import org.gcube.vomanagement.usermanagement.util.ManagementUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.gwt.user.server.rpc.RemoteServiceServlet;
import com.liferay.portal.kernel.dao.orm.QueryUtil;
import com.liferay.portal.kernel.exception.PortalException;
import com.liferay.portal.kernel.exception.SystemException;
import com.liferay.portal.kernel.util.OrderByComparator;
import com.liferay.portal.kernel.util.OrderByComparatorFactoryUtil;
import com.liferay.portal.model.User;
import com.liferay.portal.service.UserLocalServiceUtil;

@SuppressWarnings("serial")
public class PickItemServiceImpl extends RemoteServiceServlet implements PickItemService {
	private static final Logger _log = LoggerFactory.getLogger(PickItemServiceImpl.class);
	/**
	 * 
	 * @return true if you're running into the portal, false if in development
	 */
	private boolean isWithinPortal() {
		try {
			UserLocalServiceUtil.getService();
			return true;
		} 
		catch (com.liferay.portal.kernel.bean.BeanLocatorException ex) {			
			_log.trace("Development Mode ON");
			return false;
		}			
	}
//TODO: Questo metodo lunedì va modificato per fargli cercare non tutti gli utenti ma dipdende dallo scope i VRE Members oppure l'unione se è root, e poi vanno gestiti i gruppi stessa cosa.
//anzi dovresti farti passare come parametro la VRE dove è stato postato il post allora sarebbe semplicissimo, niente union non serve
	@Override
	public ArrayList<ItemBean> searchEntities(String keyword) {
		ArrayList<ItemBean> toReturn = new ArrayList<>();
		if (isWithinPortal()) {
			OrderByComparator comparator = OrderByComparatorFactoryUtil.create("User_", "screenname", true);
			try {
				_log.debug("Searching " + keyword);
				List<User> lrUsers = UserLocalServiceUtil.search(ManagementUtils.getCompany().getCompanyId(), keyword, 0, null, QueryUtil.ALL_POS, QueryUtil.ALL_POS, comparator);
				for (User user : lrUsers) {
					toReturn.add(new ItemBean(""+user.getUserId(), user.getScreenName(), user.getFullName(), getUserImagePortraitUrlLocal(user.getScreenName())));
				}
			} catch (SystemException | PortalException e) {
				e.printStackTrace();
			}
		} else { //development
			for (int i = 0; i < 10; i++) {
				toReturn.add(new ItemBean("andrea.rossi", "andrea.rossi", "Andrea Rossi", "m.assante@gmail.com"));
				if (i % 2 == 0)
					toReturn.add(new ItemBean(""+i, "username"+i, "userGetFullname()"+i, "user.getEmail()"+i));
				else
					toReturn.add(new ItemBean(""+i, "ciccio"+i, "ciccioNome"+i, "ciccioEMail"+i));
			}		
		}
		return toReturn;
	}
	/**
	 * this method is needed because user images portrait change id depending on the portal instance
	 * e.g. a post made from iMarine portal would not show the avatarIMage in D4Science.org
	 * @param screenname
	 * @return the url of the image portrait for this portal instance
	 */
	private String getUserImagePortraitUrlLocal(String screenName) {
		if (! isWithinPortal()) {
			return "";
		}
		String thumbnailURL = "";
		try {
			thumbnailURL = new LiferayUserManager().getUserByUsername(screenName).getUserAvatarURL();
		} catch (UserManagementSystemException | UserRetrievalFault e) {
			e.printStackTrace();
		}
		return thumbnailURL;
	}
	/**
	 * utility method extract the @domain.com from an email address
	 * return  @unknown-domain in case of no emails
	 */
	private String extractDomainFromEmail(String email) {
		int index =  email.indexOf('@');
		if (index > 0)
			return email.substring(index);
		else 
			return "@unknown-domain";
	}
}