/*
 * 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.advancedlogging;

import java.security.MessageDigest;
import java.util.Arrays;
import java.util.Date;
import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import at.gv.e_government.reference.namespace.mandates._20040701_.Mandate;
import at.gv.egovernment.moa.id.commons.api.AuthConfiguration;
import at.gv.egovernment.moa.id.commons.api.IOAAuthParameters;
import at.gv.egovernment.moa.id.commons.api.IRequest;
import at.gv.egovernment.moa.id.commons.api.data.IIdentityLink;
import at.gv.egovernment.moa.id.commons.api.data.IMISMandate;
import at.gv.egovernment.moa.logging.Logger;
import at.gv.egovernment.moa.util.Base64Utils;
import at.gv.egovernment.moa.util.MiscUtil;

/**
 * @author tlenz
 *
 */
@Service("MOAReversionLogger")
public class MOAReversionLogger {
	
	@Autowired protected AuthConfiguration authConfig;
	
	public static final String NAT_PERSON = "nat";
	public static final String JUR_PERSON = "jur";
	
	private static final List<Integer> defaultEventCodes = Arrays.asList(
			MOAIDEventConstants.SESSION_CREATED, 
			MOAIDEventConstants.SESSION_DESTROYED,
			MOAIDEventConstants.SESSION_ERROR,
			MOAIDEventConstants.TRANSACTION_CREATED,
			MOAIDEventConstants.TRANSACTION_DESTROYED,
			MOAIDEventConstants.TRANSACTION_ERROR,
			MOAIDEventConstants.TRANSACTION_IP,
			MOAIDEventConstants.AUTHPROTOCOL_TYPE,
			MOAIDEventConstants.AUTHPROTOCOL_PVP_METADATA,
			
			MOAIDEventConstants.AUTHPROCESS_SERVICEPROVIDER,
			MOAIDEventConstants.AUTHPROCESS_INTERFEDERATION,
			MOAIDEventConstants.AUTHPROCESS_STORK_REQUESTED,
			MOAIDEventConstants.AUTHPROCESS_MANDATES_REQUESTED,
			
			MOAIDEventConstants.AUTHPROCESS_START,
			MOAIDEventConstants.AUTHPROCESS_FINISHED,
			MOAIDEventConstants.AUTHPROCESS_BKU_URL,
			MOAIDEventConstants.AUTHPROCESS_BKU_DATAURL_IP,
			MOAIDEventConstants.AUTHPROCESS_IDL_VALIDATED,
			MOAIDEventConstants.AUTHPROCESS_CERTIFICATE_VALIDATED,
			MOAIDEventConstants.AUTHPROCESS_AUTHBLOCK_VALIDATED,

			MOAIDEventConstants.AUTHPROCESS_IDP_SLO_REQUESTED,
			MOAIDEventConstants.AUTHPROCESS_SLO_STARTED,
			MOAIDEventConstants.AUTHPROCESS_SLO_ALL_VALID,
			MOAIDEventConstants.AUTHPROCESS_SLO_NOT_ALL_VALID,
			
			MOAIDEventConstants.AUTHPROCESS_ELGA_MANDATE_SERVICE_REQUESTED,
			MOAIDEventConstants.AUTHPROCESS_ELGA_MANDATE_ERROR_RECEIVED,
			MOAIDEventConstants.AUTHPROCESS_ELGA_MANDATE_RECEIVED,
			MOAIDEventConstants.AUTHPROCESS_ELGA_MANDATE_RECEIVED_IP,
			
			MOAIDEventConstants.AUTHPROCESS_PEPS_SELECTED,
			MOAIDEventConstants.AUTHPROCESS_PEPS_REQUESTED,
			MOAIDEventConstants.AUTHPROCESS_PEPS_RECEIVED,
			MOAIDEventConstants.AUTHPROCESS_PEPS_RECEIVED_ERROR,
			MOAIDEventConstants.AUTHPROCESS_PEPS_IDL_RECEIVED,
			
			MOAIDEventConstants.AUTHPROCESS_FOREIGN_FOUND,
			MOAIDEventConstants.AUTHPROCESS_FOREIGN_SZRGW_RECEIVED,
						
			MOAIDEventConstants.AUTHPROCESS_MANDATE_SERVICE_REQUESTED,
			MOAIDEventConstants.AUTHPROCESS_MANDATE_REDIRECT,
			MOAIDEventConstants.AUTHPROCESS_MANDATE_RECEIVED,
			
			MOAIDEventConstants.AUTHPROCESS_SSO,
			MOAIDEventConstants.AUTHPROCESS_SSO_ASK_USER_START,
			MOAIDEventConstants.AUTHPROCESS_SSO_ASK_USER_FINISHED,
			MOAIDEventConstants.AUTHPROCESS_SSO_INVALID
			

	);
			
	public void logEvent(IOAAuthParameters oaConfig, 
			int eventCode, String message) {
		if (selectOASpecificEventCodes(oaConfig).contains(eventCode))
			MOAIDEventLog.logEvent(MOAIDEventLog.createNewEvent(new Date().getTime(), eventCode, message));		
	}
	
	public void logEvent(IOAAuthParameters oaConfig, IRequest pendingRequest, 
			int eventCode) {		
			if (selectOASpecificEventCodes(oaConfig).contains(eventCode))
			MOAIDEventLog.logEvent(MOAIDEventLog.createNewEvent(new Date().getTime(), eventCode, 
					pendingRequest.getUniqueSessionIdentifier(), 
					pendingRequest.getUniqueTransactionIdentifier()));
									
	}
	
	public void logEvent(IOAAuthParameters oaConfig, IRequest pendingRequest, 
			int eventCode, String message) {		
		if (selectOASpecificEventCodes(oaConfig).contains(eventCode))
			MOAIDEventLog.logEvent(MOAIDEventLog.createNewEvent(new Date().getTime(), eventCode,
					message,
					pendingRequest.getUniqueSessionIdentifier(), 
					pendingRequest.getUniqueTransactionIdentifier()
					));
									
	}

	/**
	 * @param sessionCreated
	 * @param uniqueSessionIdentifier
	 */
	public void logEvent(int eventCode, String message) {
		MOAIDEventLog.logEvent(MOAIDEventLog.createNewEvent(new Date().getTime(), eventCode, message));
		
	}
	
	/**
	 * @param sessionCreated
	 * @param uniqueSessionIdentifier
	 */
	public void logEvent(String sessionID, String transactionID, int eventCode, String message) {
		MOAIDEventLog.logEvent(MOAIDEventLog.createNewEvent(new Date().getTime(), eventCode, message, sessionID, transactionID));
		
	}

	/**
	 * @param sessionCreated
	 * @param uniqueSessionIdentifier
	 */
	public void logEvent(String sessionID, String transactionID, int eventCode) {
		MOAIDEventLog.logEvent(MOAIDEventLog.createNewEvent(new Date().getTime(), eventCode, sessionID, transactionID));
		
	}
	
	/**
	 * @param errorRequest
	 * @param transactionError
	 */
	public void logEvent(IRequest pendingRequest, int eventCode) {
		MOAIDEventLog.logEvent(MOAIDEventLog.createNewEvent(new Date().getTime(), eventCode, 
				pendingRequest.getUniqueSessionIdentifier(), 
				pendingRequest.getUniqueTransactionIdentifier()));
		
	}
	
	public void logEvent(IRequest pendingRequest, int eventCode, String message) {
		logEvent(pendingRequest.getOnlineApplicationConfiguration(), 
				pendingRequest, eventCode, message);
		
	}
	
	public void logMandateEventSet(IRequest pendingReq, IMISMandate mandate) {
		if (MiscUtil.isNotEmpty(mandate.getOWbPK()))
			logEvent(pendingReq, MOAIDEventConstants.PERSONAL_INFORMATION_PROF_REPRESENTATIVE_BPK, 
					mandate.getOWbPK());
		
		if (MiscUtil.isNotEmpty(mandate.getProfRep()))
			logEvent(pendingReq, MOAIDEventConstants.PERSONAL_INFORMATION_PROF_REPRESENTATIVE, 
					mandate.getProfRep());
		
		Mandate jaxBMandate = mandate.getMandateJaxB();
		if (jaxBMandate != null) {
			logEvent(pendingReq, MOAIDEventConstants.PERSONAL_INFORMATION_MANDATE_TYPE, 
					jaxBMandate.getAnnotation());
			
			if (jaxBMandate.getMandator().getCorporateBody() != null) {
				logEvent(pendingReq, MOAIDEventConstants.PERSONAL_INFORMATION_MANDATE_MANDATOR_TYPE, 
						JUR_PERSON);
				try {
					String jurBaseID = jaxBMandate.getMandator().getCorporateBody().getIdentification().get(0).getType() 
							+ "+" + jaxBMandate.getMandator().getCorporateBody().getIdentification().get(0).getId();				
					logEvent(pendingReq, MOAIDEventConstants.PERSONAL_INFORMATION_MANDATE_MANDATOR_BASEID, 
								jurBaseID);
					
				} catch (Throwable e) {
					Logger.warn("ReversionsLogger: mandator baseID logging FAILED.", e);
					
				}
				
			} else {
				logEvent(pendingReq, MOAIDEventConstants.PERSONAL_INFORMATION_MANDATE_MANDATOR_TYPE, 
						NAT_PERSON);
				logEvent(pendingReq, MOAIDEventConstants.PERSONAL_INFORMATION_MANDATE_MANDATOR_HASH, 
						buildPersonInformationHash(
								jaxBMandate.getMandator().getPhysicalPerson().getName().getGivenName().get(0), 
								jaxBMandate.getMandator().getPhysicalPerson().getName().getFamilyName().get(0).getValue(), 
								jaxBMandate.getMandator().getPhysicalPerson().getDateOfBirth()));						
			}
		}
	}
	
	/**
	 * @param pendingReq
	 * @param identityLink
	 */
	public void logPersonalInformationEvent(IRequest pendingReq,
			IIdentityLink identityLink) {
		logEvent(pendingReq, MOAIDEventConstants.PERSONAL_INFORMATION_USERNAME_HASH, 
				buildPersonInformationHash(
						identityLink.getGivenName(),
						identityLink.getFamilyName(),
						identityLink.getDateOfBirth()
						));
		
	}
	
	private List<Integer> selectOASpecificEventCodes(IOAAuthParameters oaConfig) {
		List<Integer> OASpecificEventCodes = null;
		if (oaConfig != null && oaConfig.getReversionsLoggingEventCodes() != null)
			OASpecificEventCodes = oaConfig.getReversionsLoggingEventCodes();
			
		else
			OASpecificEventCodes = getDefaulttReversionsLoggingEventCodes();
		
		return OASpecificEventCodes;
	}
	
	public String buildPersonInformationHash(String givenName, String familyName, String dateofBirth) {
		
		// {"hash":"hashvalue","salt":"testSalt"}
		// {"person":{"givenname":"value","familyname":"value","dateofbirth":"value"},"salt":"saltvalue"}
		
		String salt = "default";
		String inputData = "{\"person\":{\"givenname\":\""
				+ givenName 
				+ "\",\"familyname\":\""
				+ familyName
				+ "\",\"dateofbirth\":\""
				+ dateofBirth
				+"\"},\"salt\":\""
				+ salt
				+"\"}";
		
        MessageDigest md;
		try {
			md = MessageDigest.getInstance("SHA-256");
			byte[] hash = md.digest(inputData.getBytes("UTF-8"));
			String hashBase64 = Base64Utils.encode(hash);
			return "{\"hash\":\"" + hashBase64 + "\",\"salt\":\"" + salt + "\"}";
			
		} catch (Throwable e) {
			Logger.warn("ReversionsLogger: mandator personalInformationHash logging FAILED.", e);
			return null;
			
		}		
						
	}

	public List<Integer> getDefaulttReversionsLoggingEventCodes() {
		List<Integer> configuredDefaultEventCodes = authConfig.getDefaultRevisionsLogEventCodes();
		if (configuredDefaultEventCodes != null)
			return configuredDefaultEventCodes;
		
		return defaultEventCodes;
	}
	
}