/*
 * Copyright 2014 Federal Chancellery Austria
 * MOA-ID has been developed in a cooperation between BRZ, the Federal
 * Chancellery Austria - ICT staff unit, and Graz University of Technology.
 *
 * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by
 * the European Commission - subsequent versions of the EUPL (the "Licence");
 * You may not use this work except in compliance with the Licence.
 * You may obtain a copy of the Licence at:
 * http://www.osor.eu/eupl/
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the Licence is distributed on an "AS IS" basis,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the Licence for the specific language governing permissions and
 * limitations under the Licence.
 *
 * This product combines work with different licenses. See the "NOTICE" text
 * file for details on the various modules and licenses.
 * The "NOTICE" text file is part of the distribution. Any derivative works
 * that you distribute must include a readable copy of the "NOTICE" text file.
 */
package at.gv.egovernment.moa.id.auth.modules.ssotransfer.servlet;

import java.io.IOException;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.lang.StringEscapeUtils;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import at.gv.egiz.eaaf.core.api.IRequest;
import at.gv.egiz.eaaf.core.exceptions.EAAFException;
import at.gv.egiz.eaaf.core.impl.idp.controller.AbstractProcessEngineSignalController;
import at.gv.egiz.eaaf.core.impl.utils.TransactionIDUtils;
import at.gv.egovernment.moa.id.commons.api.exceptions.MOAIDException;
import at.gv.egovernment.moa.logging.Logger;

/**
 * @author tlenz
 *
 */
@Controller
public class SSOTransferSignalServlet extends AbstractProcessEngineSignalController {
	public SSOTransferSignalServlet() {
		super();
		Logger.debug("Registering servlet " + getClass().getName() + " with mappings '/SSOTransferEndpoint'.");
		
	}
	
	@RequestMapping(value = {	"/SSOTransferSignalEndpoint"
							}, 
							method = {RequestMethod.POST, RequestMethod.GET})
	public void performSSOTransfer(HttpServletRequest req, HttpServletResponse resp) throws IOException, EAAFException {
		signalProcessManagement(req, resp);

	}
	
	@Override
	protected void signalProcessManagement(HttpServletRequest req, HttpServletResponse resp) throws IOException, EAAFException {
		String pendingRequestID = StringEscapeUtils.escapeHtml(getPendingRequestId(req));
		IRequest pendingReq = null;
		try {	
			if (pendingRequestID == null) {
				throw new IllegalStateException("Unable to determine MOA pending-request id.");
			}
			
			pendingReq = requestStorage.getPendingRequest(pendingRequestID);
			if (pendingReq == null) {
				Logger.info("No PendingRequest with Id: " + pendingRequestID + " Maybe, a transaction timeout occure.");
				throw new MOAIDException("auth.28", new Object[]{pendingRequestID});
				
			}
						
			//add transactionID and unique sessionID to Logger
			TransactionIDUtils.setSessionId(pendingReq.getUniqueSessionIdentifier());
			TransactionIDUtils.setTransactionId(pendingReq.getUniqueTransactionIdentifier());
			
			// process instance is mandatory
			if (pendingReq.getProcessInstanceId() == null) {
				throw new IllegalStateException("MOA session does not provide process instance id.");
			}

			// wake up next task
			processEngine.signal(pendingReq);
			
		} catch (Exception ex) {
			handleError(null, ex, req, resp, pendingReq);
			
		} finally {
			//MOASessionDBUtils.closeSession();
			TransactionIDUtils.removeTransactionId();
			TransactionIDUtils.removeSessionId();
			
		}
		
		
	}
}