package at.gv.egovernment.moa.id.auth.modules.internal.tasks;

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

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Component;
import org.springframework.util.Base64Utils;

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.egovernment.moa.id.auth.AuthenticationServer;
import at.gv.egovernment.moa.id.auth.data.AuthenticationSessionWrapper;
import at.gv.egovernment.moa.id.commons.api.exceptions.MOAIDException;
import at.gv.egovernment.moa.id.logging.SpecificTraceLogger;
import at.gv.egovernment.moa.id.util.CitizenCardServletUtils;
import at.gv.egovernment.moa.logging.Logger;

/**
 * Creates {@code CreateXMLSignatureRequest} for auth block signature.<p/>
 * In detail:
 * <ul>
 * <li>Renames the moa session id.</li>
 * <li>Creates {@code CreateXMLSignatureRequest} for auth block signature.</li>
 * <li>Responds with {@code CreateXMLSignatureRequest} (for CCE), {@code DataURL} is {@code /VerifyAuthBlock}</li>
 * </ul>
 * Expects:
 * <ul>
 * <li>HttpServletRequest parameter {@linkplain at.gv.egovernment.moa.id.commons.MOAIDAuthConstants#PARAM_SESSIONID PARAM_SESSIONID}</li>
 * </ul>
 * Result:
 * <ul>
 * <li>Responds with {@code CreateXMLSignatureRequest} (for CCE), {@code DataURL} is {@code /VerifyAuthBlock}</li>
 * </ul>
 * Code taken from {@link at.gv.egovernment.moa.id.auth.servlet.VerifyIdentityLinkServlet}.
 * @see #execute(ExecutionContext, HttpServletRequest, HttpServletResponse)
 *
 */
@Component("PrepareAuthBlockSignatureTask")
public class PrepareAuthBlockSignatureTask extends AbstractAuthServletTask {

	@Autowired @Qualifier("CitizenCardAuthenticationServer") private AuthenticationServer authServer;
	
	@Override 
	public void execute(ExecutionContext executionContext, HttpServletRequest req, HttpServletResponse resp)
			throws TaskExecutionException {
		// note: code taken from at.gv.egovernment.moa.id.auth.servlet.VerifyIdentityLinkServlet

		Logger.debug("Process CreateAuthBlock Task");
		
		try {
			//initialize task
			AuthenticationSessionWrapper moasession = pendingReq.getSessionData(AuthenticationSessionWrapper.class);
			
			//build authBlock
			String createXMLSignatureRequest = authServer
					.getCreateXMLSignatureRequestAuthBlockOrRedirect(moasession, pendingReq);

			//store pending request with new MOASession data information
			requestStoreage.storePendingRequest(pendingReq);
			
			//log AuthBlock into specialLogger
			SpecificTraceLogger.trace("Raw AuthBlock: " + Base64Utils.encodeToString(createXMLSignatureRequest.getBytes("UTF-8")));
			
			//write response
			CitizenCardServletUtils.writeCreateXMLSignatureRequestOrRedirect(resp, pendingReq,
					createXMLSignatureRequest, AuthenticationServer.REQ_PROCESS_VALIDATOR_INPUT,
					"VerifyIdentityLink");

		} catch (MOAIDException ex) {
			throw new TaskExecutionException(pendingReq, ex.getMessage(), ex);

		} catch (Exception e) {
			Logger.error("IdentityLinkValidation has an interal Error.", e);
			throw new TaskExecutionException(pendingReq, e.getMessage(), e);
		}

		finally {
			
		}
	}

}