/**
 * 
 */
package org.gcube.portlets.user.dataminermanager.server.util;

import static org.gcube.common.authorization.client.Constants.authorizationService;

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

import javax.activation.DataSource;
import javax.servlet.http.HttpSession;

import org.apache.log4j.Logger;
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.dataminermanager.server.smservice.SClient;
import org.gcube.portlets.user.dataminermanager.server.smservice.SClient4WPSBuilder;
import org.gcube.portlets.user.dataminermanager.server.smservice.SClientBuilder;
import org.gcube.portlets.user.dataminermanager.server.smservice.SClientDirector;
import org.gcube.portlets.user.dataminermanager.shared.Constants;
import org.gcube.portlets.user.dataminermanager.shared.exception.ExpiredSessionServiceException;
import org.gcube.portlets.user.dataminermanager.shared.exception.ServiceException;

/**
 * 
 * @author Giancarlo Panichi email: <a
 *         href="mailto:g.panichi@isti.cnr.it">g.panichi@isti.cnr.it</a>
 *
 */
public class SessionUtil {

	private static final Logger logger = Logger.getLogger(SessionUtil.class);
	// private final static String hostUrl =
	// "http://pc-angela.isti.cnr.it:9090";
	// private static URI host = URI.create(hostUrl);
	// private final static String SCOPE = "/gcube";

	public static final String DATASOURCE_ATTRIBUTE_NAME = "TDW.DATASOURCE";

	public static ASLSession getASLSession(HttpSession httpSession)
			throws ServiceException {
		String username = (String) httpSession
				.getAttribute(ScopeHelper.USERNAME_ATTRIBUTE);
		ASLSession aslSession;
		if (username == null) {
			if (Constants.DEBUG_MODE) {
				logger.info("no user found in session, use test user");
				/*
				 * throw new ExpiredSessionServiceException("Session Expired!");
				 */

				// Remove comment for Test
				username = Constants.DEFAULT_USER;
				String scope = Constants.DEFAULT_SCOPE;

				httpSession.setAttribute(ScopeHelper.USERNAME_ATTRIBUTE,
						username);
				aslSession = SessionManager.getInstance().getASLSession(
						httpSession.getId(), username);
				aslSession.setScope(scope);
			} else {
				logger.info("no user found in session, use test user");
				throw new ExpiredSessionServiceException("Session Expired!");

			}
		} else {
			aslSession = SessionManager.getInstance().getASLSession(
					httpSession.getId(), username);

		}

		logger.info("SessionUtil: aslSession " + aslSession.getUsername() + " "
				+ aslSession.getScope());

		return aslSession;
	}

	public static String getToken(ASLSession aslSession) {
		String token=null;
		if (Constants.DEBUG_MODE) {
			List<String> userRoles = new ArrayList<>();
			userRoles.add(Constants.DEFAULT_ROLE);
			/*if (aslSession.getUsername().compareTo("lucio.lelii") == 0)
				userRoles.add("VRE-Manager");*/
			token = authorizationService().build().generate(
					aslSession.getUsername(), userRoles);
			
		} else {
			token = aslSession.getSecurityToken();
		}
		logger.info("received token: " + token);
		return token;
		
		
	}

	public static DataSource getDataSource(HttpSession httpSession)
			throws ServiceException {
		ASLSession session = getASLSession(httpSession);
		return (DataSource) session.getAttribute(DATASOURCE_ATTRIBUTE_NAME);
	}

	public static SClient getSClient(HttpSession session, ASLSession aslSession)
			throws Exception {

		SClient sClient = (SClient) session.getAttribute(Constants.SClient);

		if (sClient == null) {
			ServiceCredential serviceCredential=new ServiceCredential(aslSession.getUsername(), aslSession.getScope(), 
					SessionUtil.getToken(aslSession));
			SClientBuilder sBuilder = new SClient4WPSBuilder(serviceCredential);

			SClientDirector director = new SClientDirector();
			director.setSClientBuilder(sBuilder);
			director.constructSClient();
			sClient = director.getSClient();
			session.setAttribute(Constants.SClient, sClient);
		}

		return sClient;

	}

}