/*
 * 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.internal.tasks;

import java.util.Enumeration;

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

import org.apache.commons.lang.StringEscapeUtils;
import org.springframework.stereotype.Service;

import at.gv.egovernment.moa.id.auth.MOAIDAuthConstants;
import at.gv.egovernment.moa.id.auth.exception.MOAIDException;
import at.gv.egovernment.moa.id.auth.modules.AbstractAuthServletTask;
import at.gv.egovernment.moa.id.auth.modules.TaskExecutionException;
import at.gv.egovernment.moa.id.commons.db.ex.MOADatabaseException;
import at.gv.egovernment.moa.id.process.api.ExecutionContext;
import at.gv.egovernment.moa.logging.Logger;
import at.gv.egovernment.moa.util.MiscUtil;

/**
 * @author tlenz
 *
 */
@Service("EvaluateBKUSelectionTask")
public class EvaluateBKUSelectionTask extends AbstractAuthServletTask {

	/* (non-Javadoc)
	 * @see at.gv.egovernment.moa.id.process.springweb.MoaIdTask#execute(at.gv.egovernment.moa.id.process.api.ExecutionContext, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
	 */
	@Override
	public void execute(ExecutionContext executionContext, HttpServletRequest request, HttpServletResponse response)
			throws TaskExecutionException {		
		try {
			//load pending request
			String pendingReqID = request.getParameter(MOAIDAuthConstants.PARAM_TARGET_PENDINGREQUESTID);	    		    
			pendingReqID = StringEscapeUtils.escapeHtml(pendingReqID);						
			pendingReq = requestStoreage.getPendingRequest(pendingReqID);
			
			if (pendingReq == null) {
				Logger.info("No PendingRequest with Id: " + executionContext.get("pendingRequestID") + " Maybe, a transaction timeout occure.");
				throw new MOAIDException("auth.28", new Object[]{executionContext.get("pendingRequestID")});
				
			}
			
			//change pending-request ID
			String newPendingRequestID = requestStoreage.changePendingRequestID(pendingReq);
			executionContext.put(MOAIDAuthConstants.PARAM_TARGET_PENDINGREQUESTID, newPendingRequestID);
	    	
	    	String moaSessionID = pendingReq.getMOASessionIdentifier();
	    	try {
	    	    moasession = authenticatedSessionStorage.getSession(moaSessionID);
	    	    
	    	    if (moasession == null) {
					Logger.info("MOASession with SessionID="+ moaSessionID + " is not found in Database");
					throw new MOAIDException("init.04", new Object[] {
							moaSessionID});
	    	    	
	    	    }
	    	   	    	    
				// set parameter execution context			
				Enumeration<String> reqParamNames = request.getParameterNames();
				while(reqParamNames.hasMoreElements()) {
					String paramName = reqParamNames.nextElement();
					if (MiscUtil.isNotEmpty(paramName) && 
							!MOAIDAuthConstants.PARAM_TARGET_PENDINGREQUESTID.equalsIgnoreCase(paramName))
						executionContext.put(paramName, request.getParameter(paramName));
					
				}
	    	    
				Logger.info("BKU is selected finished -> Start BKU communication ...");
	    	    
			} catch (MOADatabaseException e) {
				Logger.info("MOASession with SessionID="+ moaSessionID + " is not found in Database");
				throw new MOAIDException("init.04", new Object[] {
						moaSessionID});
				
			} catch (Throwable e) {
				Logger.info("No HTTP Session found!");
				throw new MOAIDException("auth.18", new Object[] {});
			}
	    	
	    	
			
			
		} catch (MOAIDException e) {
			throw new TaskExecutionException(pendingReq, e.getMessage(), e);
			
		} catch (Exception e) {
			Logger.warn("EvaluateBKUSelectionTask has an internal error", e);
			throw new TaskExecutionException(pendingReq, e.getMessage(), e);
			
		}
	}

}