/*******************************************************************************
 * 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.moduls;

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

import at.gv.egovernment.moa.id.advancedlogging.TransactionIDUtils;
import at.gv.egovernment.moa.id.commons.api.IRequest;
import at.gv.egovernment.moa.id.commons.api.exceptions.MOAIDException;
import at.gv.egovernment.moa.id.commons.db.ex.MOADatabaseException;
import at.gv.egovernment.moa.id.process.dao.ProcessInstanceStoreDAO;
import at.gv.egovernment.moa.id.storage.ITransactionStorage;
import at.gv.egovernment.moa.id.util.Random;
import at.gv.egovernment.moa.logging.Logger;

@Service("RequestStorage")
public class RequestStorage implements IRequestStorage{

	@Autowired ITransactionStorage transactionStorage;
	@Autowired ProcessInstanceStoreDAO processInstanceStore;
	
	@Override
	public IRequest getPendingRequest(String pendingReqID) {
		
		try {
			IRequest pendingRequest = transactionStorage.get(pendingReqID, IRequest.class);
			if (pendingRequest == null) {
				Logger.info("No PendingRequst found with pendingRequestID " + pendingReqID);			
				return null;
				
			}
					
			//set transactionID and sessionID to Logger
			TransactionIDUtils.setTransactionId(pendingRequest.getUniqueTransactionIdentifier());
			TransactionIDUtils.setSessionId(pendingRequest.getUniqueSessionIdentifier());
			
			return pendingRequest;
		
		} catch (MOADatabaseException | NullPointerException e) {
			Logger.info("No PendingRequst found with pendingRequestID " + pendingReqID);			
			return null;
			
		}
	}

	@Override
	public void storePendingRequest(IRequest pendingRequest) throws MOAIDException {
		try {			
			if (pendingRequest instanceof IRequest) {
				transactionStorage.put(((IRequest)pendingRequest).getRequestID(), pendingRequest, -1);
												
			} else {
				throw new MOAIDException("auth.20", null);
				
			}
			
		} catch (MOADatabaseException e) {
			Logger.warn("Pending Request with ID=" + ((IRequest)pendingRequest).getRequestID() +
					" can not stored.", e);
			throw new MOAIDException("auth.20", null);
		}
		
	}
	
	@Override
	public void removePendingRequest(String requestID) {
		
		if (requestID != null) {
			
			//remove process-management execution instance
			try {
				IRequest pendingReq = getPendingRequest(requestID);
						
				if (pendingReq != null && 
						pendingReq.getProcessInstanceId() != null) {
					processInstanceStore.remove(pendingReq.getProcessInstanceId());
					
				}

			} catch (MOADatabaseException e) {
				Logger.warn("Removing process associated with pending-request:" + requestID + " FAILED.", e);
				
			}
				
			transactionStorage.remove(requestID);
			
		}
	}

	/* (non-Javadoc)
	 * @see at.gv.egovernment.moa.id.storage.IRequestStorage#changePendingRequestID(at.gv.egovernment.moa.id.moduls.IRequest)
	 */
	@Override
	public String changePendingRequestID(IRequest pendingRequest) throws MOAIDException, MOADatabaseException {

		if (pendingRequest instanceof RequestImpl) {
			String newRequestID = Random.nextRandom();
			String oldRequestID = pendingRequest.getRequestID();
			
			Logger.debug("Change pendingRequestID from " + pendingRequest.getRequestID() 
				+ " to " + newRequestID);
			
			((RequestImpl)pendingRequest).setRequestID(newRequestID);			
			transactionStorage.changeKey(oldRequestID, newRequestID, pendingRequest);
			//only delete oldRequestID, no change.
			
			return newRequestID;
						
		} else {
			Logger.error("PendingRequest object is not of type 'RequestImpl.class'");
			throw new MOAIDException("internal.00", null);
		}
		
	}
}