package org.gcube.portlets.user.questions.server;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.apache.commons.codec.binary.Base64;
import org.gcube.application.framework.core.session.ASLSession;
import org.gcube.application.framework.core.session.SessionManager;
import org.gcube.portal.custom.scopemanager.scopehelper.ScopeHelper;

import org.gcube.portlets.user.gcubewidgets.server.ScopeServiceImpl;
import org.gcube.portlets.user.questions.client.QuestionsService;
import org.gcube.portlets.user.questions.shared.GroupDTO;
import org.gcube.vomanagement.usermanagement.GroupManager;
import org.gcube.vomanagement.usermanagement.UserManager;
import org.gcube.vomanagement.usermanagement.exception.GroupRetrievalFault;
import org.gcube.vomanagement.usermanagement.impl.LiferayGroupManager;
import org.gcube.vomanagement.usermanagement.impl.LiferayRoleManager;
import org.gcube.vomanagement.usermanagement.impl.LiferayUserManager;
import org.gcube.vomanagement.usermanagement.model.GCubeGroup;
import org.gcube.vomanagement.usermanagement.model.GCubeRole;
import org.gcube.vomanagement.usermanagement.model.GCubeTeam;
import org.gcube.vomanagement.usermanagement.model.GCubeUser;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.gwt.user.server.rpc.RemoteServiceServlet;
import com.liferay.portal.service.UserLocalServiceUtil;

/**
 * 
 * @author massi
 *
 */
@SuppressWarnings("serial")
public class QuestionsServiceImpl extends RemoteServiceServlet implements QuestionsService {
	private static final Logger _log = LoggerFactory.getLogger(QuestionsServiceImpl.class);
	private static final String TEST_USER = "test.user";
	/**
	 * the current ASLSession
	 * @return the session
	 */
	private ASLSession getASLSession() {
		String sessionID = this.getThreadLocalRequest().getSession().getId();
		String user = (String) this.getThreadLocalRequest().getSession().getAttribute(ScopeHelper.USERNAME_ATTRIBUTE);
		if (user == null) {
			_log.warn("USER IS NULL setting test.user and Running OUTSIDE PORTAL");
			user = getDevelopmentUser();
		}		
		return SessionManager.getInstance().getASLSession(sessionID, user);
	}
	/**
	 * when packaging test will fail if the user is not set to test.user
	 * @return .
	 */
	public String getDevelopmentUser() {
		String user = TEST_USER;
		user = "massimiliano.assante";
		return user;
	}

	@Override
	public ArrayList<GroupDTO> getGroups() {
		ArrayList<GroupDTO> toReturn = new ArrayList<>();	
		ASLSession session = getASLSession();
		if (session.getUsername().compareTo(TEST_USER) == 0) {
			_log.error("User is NULL, session expired?");
			return new ArrayList<>();
		}
		if (isWithinPortal()) {
			try {
				toReturn.add(new GroupDTO(true, "VRE Managers", "No Desc", ""));
				List<GCubeTeam> groups = new LiferayRoleManager().listTeamsByGroup(getCurrentGroupID());
				for (GCubeTeam g : groups) {
					toReturn.add(new GroupDTO(false, g.getTeamName(),g.getDescription(), g.getTeamId()+""));
				}
			} catch (GroupRetrievalFault e) {
				e.printStackTrace();
			}
			
			
		} else {
			toReturn.add(new GroupDTO(true, "VRE Managers ", "Desc", "URL"));
			for (int i = 0; i < 5; i++) {
				toReturn.add(new GroupDTO(false, "Group " + i, "Desc", "URL"));
			}
		}		
		return toReturn;
	}

	
	
	/**
	 * 
	 * @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;
		}			
	}
	/**
	 * Get the current group ID
	 * 
	 * @return the current group ID or null if an exception is thrown
	 * @throws Exception 
	 * @throws CurrentGroupRetrievalException 
	 */
	private long getCurrentGroupID(){
		GroupManager groupM = new LiferayGroupManager();
		ASLSession session = getASLSession();
		_log.debug("The current group NAME is --> " + session.getGroupName());	
		try {
			return groupM.getGroupId(session.getGroupName());
		} catch (Exception e) {
			e.printStackTrace();
		}
		return 0;
	}

	

	protected static ArrayList<String> getAdministratorsEmails(String scope) {
		LiferayUserManager userManager = new LiferayUserManager();
		LiferayGroupManager groupManager = new LiferayGroupManager();
		long groupId = -1;
		try {
			List<GCubeGroup> allGroups = groupManager.listGroups();
			_log.debug("Number of groups retrieved: " + allGroups.size());
			for (int i = 0; i < allGroups.size(); i++) {
				long grId = allGroups.get(i).getGroupId();
				String groupScope = groupManager.getInfrastructureScope(grId);
				_log.debug("Comparing: " + groupScope + " " + scope);
				if (groupScope.equals(scope)) {
					groupId = allGroups.get(i).getGroupId();
					break;
				}
			}
		} catch (Exception e) {
			e.printStackTrace();
		} 
		Map<GCubeUser, List<GCubeRole>> usersAndRoles = null;
		try {
			usersAndRoles = userManager.listUsersAndRolesByGroup(groupId);
		} catch (Exception e) {
			e.printStackTrace();
		} 
		Set<GCubeUser> users = usersAndRoles.keySet();
		ArrayList<String> adminEmailsList = new ArrayList<String>();
		for (GCubeUser usr:users) {
			List<GCubeRole> roles = usersAndRoles.get(usr);
			for (int i = 0; i < roles.size(); i++) {
				if (roles.get(i).getRoleName().equals("VO-Admin") || roles.get(i).getRoleName().equals("VRE-Manager")) {
					adminEmailsList.add(usr.getEmail());
					_log.debug("Admin: " + usr.getFullname());
					break;
				}
			}
		}
		return adminEmailsList;
	}
}