/**
 *
 */
package org.gcube.portlets.user.geoportaldataentry.server;

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

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

import org.gcube.application.geoportal.common.model.legacy.Concessione;
import org.gcube.application.geoportal.common.rest.MongoConcessioni;
import org.gcube.application.geoportalcommon.GeoportalCommon;
import org.gcube.application.geoportalcommon.shared.GeoNaDataViewerProfile;
import org.gcube.common.authorization.library.provider.SecurityTokenProvider;
import org.gcube.common.portal.PortalContext;
import org.gcube.common.scope.api.ScopeProvider;
import org.gcube.portlets.user.geoportaldataentry.shared.ResultSetSorted;
import org.gcube.vomanagement.usermanagement.GroupManager;
import org.gcube.vomanagement.usermanagement.exception.GroupRetrievalFault;
import org.gcube.vomanagement.usermanagement.exception.UserManagementSystemException;
import org.gcube.vomanagement.usermanagement.impl.LiferayGroupManager;
import org.gcube.vomanagement.usermanagement.model.GCubeGroup;
import org.gcube.vomanagement.usermanagement.model.GCubeUser;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.liferay.portal.service.UserLocalServiceUtil;

/**
 * The Class SessionUtil.
 *
 * @author Francesco Mangiacrapa at ISTI-CNR (francesco.mangiacrapa@isti.cnr.it)
 * 
 *         Oct 20, 2020
 */
public class SessionUtil {

	private static final String GEONA_DATAVIEWER_PROFILE = "GEONA_DATAVIEWER_PROFILE";
	private static final String LIST_OF_CONCESSIONI = "LIST_OF_CONCESSIONI";
	/** The log. */
	private static Logger LOG = LoggerFactory.getLogger(SessionUtil.class);

	/**
	 * Checks if is into portal.
	 *
	 * @return true, if is into portal
	 */
	public static boolean isIntoPortal() {
		try {
			UserLocalServiceUtil.getService();
			return true;
		} catch (Exception ex) {
			LOG.debug("Development Mode ON");
			return false;
		}
	}

	/**
	 * Retrieve the current user by using the portal manager.
	 *
	 * @param request the request
	 * @return a GcubeUser object
	 */
	public static GCubeUser getCurrentUser(HttpServletRequest request) {

		if (request == null)
			throw new IllegalArgumentException("HttpServletRequest is null!");

		PortalContext pContext = PortalContext.getConfiguration();
		GCubeUser user = pContext.getCurrentUser(request);
		LOG.debug("Returning user " + user);
		return user;
	}

	/**
	 * Retrieve the current scope by using the portal manager.
	 *
	 * @param request             the request
	 * @param setContextsInThread set the scope and the security token into current
	 *                            thread
	 * @return a GcubeUser object
	 */
	public static String getCurrentContext(HttpServletRequest request, boolean setContextsInThread) {

		if (request == null)
			throw new IllegalArgumentException("HttpServletRequest is null!");

		PortalContext pContext = PortalContext.getConfiguration();
		String context = pContext.getCurrentScope(request);

		if (setContextsInThread) {
			GCubeUser user = getCurrentUser(request);
			String token = pContext.getCurrentUserToken(context, user.getUsername());

			if (context != null)
				ScopeProvider.instance.set(context);

			if (token != null)
				SecurityTokenProvider.instance.set(token);
		}

		return context;
	}

	/**
	 * Retrieve the group given the scope.
	 *
	 * @param scope the scope
	 * @return the group from scope
	 * @throws UserManagementSystemException the user management system exception
	 * @throws GroupRetrievalFault           the group retrieval fault
	 */
	public static GCubeGroup getGroupFromScope(String scope) throws UserManagementSystemException, GroupRetrievalFault {

		if (scope == null || scope.isEmpty())
			throw new IllegalArgumentException("Scope is missing here!!");

		GroupManager gm = new LiferayGroupManager();
		long groupId = gm.getGroupIdFromInfrastructureScope(scope);
		return gm.getGroup(groupId);

	}

	/**
	 * Gets the list of concessioni.
	 *
	 * @param httpServletRequest the http servlet request
	 * @param reloadFromService  the reload from service
	 * @return the list of concessioni
	 * @throws Exception the exception
	 */
	public static List<Concessione> getListOfConcessioni(HttpServletRequest httpServletRequest,
			boolean reloadFromService) throws Exception {
		HttpSession session = httpServletRequest.getSession();
		List<Concessione> listOfConcessioni = (List<Concessione>) session.getAttribute(LIST_OF_CONCESSIONI);

		// setting null to force reloading from service
		if (reloadFromService)
			listOfConcessioni = null;

		if (listOfConcessioni == null) {
			listOfConcessioni = new ArrayList<Concessione>();
			LOG.info("Loading list of concessione from client mongo");
			SessionUtil.getCurrentContext(httpServletRequest, true);
			ServiceUtil serviceUtil = new ServiceUtil();
			MongoConcessioni clientMongo = serviceUtil.getInstanceMongoConcessioni();

			Iterator<Concessione> concessioni = clientMongo.getList();
			if (concessioni != null) {
				while (concessioni.hasNext()) {
					Concessione concessione = (Concessione) concessioni.next();
					listOfConcessioni.add(concessione);

				}
			}
			// LOG.debug("Got list of concessioni from client mongo: " + listOfConcessioni);
			session.setAttribute(LIST_OF_CONCESSIONI, listOfConcessioni);
			LOG.info("Saved in session list of concessioni from client mongo with size: " + listOfConcessioni.size());
		} else
			LOG.info("list of concessioni presents in session, using it");

		LOG.info("read list of concessioni with size: " + listOfConcessioni.size());
		return listOfConcessioni;
	}

	/**
	 * Gets the geportal viewer resource profile.
	 *
	 * @param httpServletRequest the http servlet request
	 * @return the geportal viewer resource profile
	 * @throws Exception the exception
	 */
	public static GeoNaDataViewerProfile getGeportalViewerResourceProfile(HttpServletRequest httpServletRequest)
			throws Exception {
		HttpSession session = httpServletRequest.getSession();
		GeoNaDataViewerProfile geoNaDataViewerProfile = (GeoNaDataViewerProfile) session
				.getAttribute(GEONA_DATAVIEWER_PROFILE);

		if (geoNaDataViewerProfile == null) {
			GeoportalCommon gc = new GeoportalCommon();
			geoNaDataViewerProfile = gc.getGeoNaDataViewProfile(null);
			session.setAttribute(GEONA_DATAVIEWER_PROFILE, geoNaDataViewerProfile);
		}

		return geoNaDataViewerProfile;

	}

	/**
	 * Gets the latest result set sorted.
	 *
	 * @param httpServletRequest the http servlet request
	 * @return the latest result set sorted
	 */
	public static ResultSetSorted getLatestResultSetSorted(HttpServletRequest httpServletRequest) {
		HttpSession session = httpServletRequest.getSession();
		return (ResultSetSorted) session.getAttribute("LATEST_RESULT_SET_SORTED");
	}

	/**
	 * Gets the latest sort filter.
	 *
	 * @param httpServletRequest the http servlet request
	 * @return the latest sort filter
	 */
	public static void setLatestResultSetSorted(HttpServletRequest httpServletRequest, ResultSetSorted rsSorted) {
		HttpSession session = httpServletRequest.getSession();
		session.setAttribute("LATEST_RESULT_SET_SORTED", rsSorted);
	}

}