/*
 * 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 static at.gv.egovernment.moa.id.commons.MOAIDAuthConstants.GET_MIS_SESSIONID;

import java.util.List;

import javax.net.ssl.SSLSocketFactory;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.w3c.dom.Element;

import at.gv.egiz.eaaf.core.api.idp.process.ExecutionContext;
import at.gv.egiz.eaaf.core.exceptions.TaskExecutionException;
import at.gv.egiz.eaaf.core.impl.idp.auth.modules.AbstractAuthServletTask;
import at.gv.egiz.eaaf.core.impl.utils.DOMUtils;
import at.gv.egiz.eaaf.core.impl.utils.DataURLBuilder;
import at.gv.egovernment.moa.id.advancedlogging.MOAIDEventConstants;
import at.gv.egovernment.moa.id.auth.data.AuthenticationSessionWrapper;
import at.gv.egovernment.moa.id.auth.exception.AuthenticationException;
import at.gv.egovernment.moa.id.commons.api.AuthConfiguration;
import at.gv.egovernment.moa.id.commons.api.ConnectionParameterInterface;
import at.gv.egovernment.moa.id.commons.api.IOAAuthParameters;
import at.gv.egovernment.moa.id.commons.api.exceptions.MISSimpleClientException;
import at.gv.egovernment.moa.id.util.SSLUtils;
import at.gv.egovernment.moa.id.util.client.mis.simple.MISSessionId;
import at.gv.egovernment.moa.id.util.client.mis.simple.MISSimpleClient;
import at.gv.egovernment.moa.logging.Logger;

/**
 * @author tlenz
 *
 */
@Component("PrepareGetMISMandateTask")
public class PrepareGetMISMandateTask extends AbstractAuthServletTask {

	@Autowired private AuthConfiguration moaAuthConfig;
	
	/* (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 {

		//mandate Mode
		try {
			//perform default task initialization
			AuthenticationSessionWrapper moasession = pendingReq.getSessionData(AuthenticationSessionWrapper.class);
						
			ConnectionParameterInterface connectionParameters = 
					moaAuthConfig.getOnlineMandatesConnectionParameter(pendingReq.getServiceProviderConfiguration(IOAAuthParameters.class));	
			SSLSocketFactory sslFactory = SSLUtils.getSSLSocketFactory(moaAuthConfig, connectionParameters);
			
			// get identitity link as byte[]
			Element elem = moasession.getIdentityLink().getSamlAssertion();
			String s = DOMUtils.serializeNode(elem);
			
			//System.out.println("IDL: " + s);
			
			byte[] idl = s.getBytes("UTF-8");
						
	        String redirectURL = new DataURLBuilder().buildDataURL(
			    pendingReq.getAuthURL(),
			    GET_MIS_SESSIONID,
			    pendingReq.getPendingRequestId());
			
	        IOAAuthParameters oaParam = pendingReq.getServiceProviderConfiguration(IOAAuthParameters.class);
	        List<String> profiles = oaParam.getMandateProfiles();

	        if (profiles == null) {
	      	  Logger.error("No Mandate/Profile for OA configured.");
	      	  throw new AuthenticationException("config.21", new Object[] { GET_MIS_SESSIONID});
	        }
	        
	        String oaFriendlyName = oaParam.getFriendlyName();
	        String mandateReferenceValue = moasession.getMandateReferenceValue();
	        byte[] cert = moasession.getEncodedSignerCertificate();
	        byte[] authBlock = moasession.getAuthBlock().getBytes("UTF-8");
	        
	        //TODO: check in case of SSO!!!
	        String targetType = oaParam.getAreaSpecificTargetIdentifier();  
	        
	        revisionsLogger.logEvent(pendingReq, MOAIDEventConstants.AUTHPROCESS_MANDATE_SERVICE_REQUESTED, mandateReferenceValue);
	        
	        MISSessionId misSessionID = MISSimpleClient.sendSessionIdRequest(
	        		connectionParameters.getUrl(), 
	        		idl, 
	        		cert, 
	        		oaFriendlyName, 
	        		redirectURL, 
	        		mandateReferenceValue, 
	        		profiles, 
	        		targetType,
	        		authBlock,
	        		sslFactory,
	        		moaAuthConfig);
	        
	        if (misSessionID == null) {
	      	  Logger.error("Fehler bei Anfrage an Vollmachten Service. MIS Session ID ist null.");
	      	  throw new MISSimpleClientException("Fehler bei Anfrage an Vollmachten Service.");
	      	  
	        }
	        
	        String redirectMISGUI = misSessionID.getRedirectURL();
	        moasession.setMISSessionID(misSessionID.getSessiondId());
		
	      //store pending request with new MOASession data information
			requestStoreage.storePendingRequest(pendingReq);
	        			
			revisionsLogger.logEvent(pendingReq, MOAIDEventConstants.AUTHPROCESS_MANDATE_REDIRECT);
			
	        response.setStatus(302);
	    	response.addHeader("Location", redirectMISGUI);
	    	Logger.debug("REDIRECT TO: " + redirectMISGUI);
	    	
		} catch (Exception e ) {
			throw new TaskExecutionException(pendingReq, e.getMessage(), e);
			
		} 
	}

}