/*
 * Copyright 2003 Federal Chancellery Austria
 * MOA-SPSS 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.spss.server.service;

import java.util.List;

import org.apache.axis.AxisFault;
import org.w3c.dom.Element;

import at.gv.egiz.asic.api.ASiC;
import at.gv.egiz.asic.api.ASiCFactory;
import at.gv.egiz.asic.api.ASiCVerificationResult;
import at.gv.egiz.asic.impl.ASiCMOAVerifier;
import at.gv.egiz.asic.xmlbind.VerifyASICSignatureRequestParser;
import at.gv.egiz.asic.xmlbind.VerifyASICSignatureResponseBuilder;
import at.gv.egiz.asic.xmlbind.VerifyASiCRequest;
import at.gv.egovernment.moa.spss.MOAApplicationException;
import at.gv.egovernment.moa.spss.MOAException;
import at.gv.egovernment.moa.spss.MOASystemException;
import at.gv.egovernment.moa.spss.api.cmsverify.VerifyCMSSignatureRequest;
import at.gv.egovernment.moa.spss.api.cmsverify.VerifyCMSSignatureResponse;
import at.gv.egovernment.moa.spss.api.xmlbind.VerifyCMSSignatureRequestParser;
import at.gv.egovernment.moa.spss.api.xmlbind.VerifyCMSSignatureResponseBuilder;
import at.gv.egovernment.moa.spss.api.xmlbind.VerifyPDFSignatureResponseBuilder;
import at.gv.egovernment.moa.spss.api.xmlbind.VerifyXMLSignatureRequestParser;
import at.gv.egovernment.moa.spss.api.xmlbind.VerifyXMLSignatureResponseBuilder;
import at.gv.egovernment.moa.spss.api.xmlverify.VerifyXMLSignatureRequest;
import at.gv.egovernment.moa.spss.api.xmlverify.VerifyXMLSignatureResponse;
import at.gv.egovernment.moa.spss.server.invoke.CMSSignatureVerificationInvoker;
import at.gv.egovernment.moa.spss.server.invoke.XMLSignatureVerificationInvoker;
import at.gv.egovernment.moa.spss.server.transaction.TransactionContext;
import at.gv.egovernment.moa.spss.server.transaction.TransactionContextManager;
import at.gv.egovernment.moaspss.logging.Logger;
import at.gv.egovernment.moaspss.util.StreamUtils;

/**
 * The service endpoint for the <code>SignatureVerification</code> web service.
 *
 * @author Patrick Peck
 * @version $Id$
 */
public class SignatureVerificationService {

  /**
   * Handle a <code>VerifyPDFSignatureRequest</code>.
   * 
   * @param request The <code>VerifyPDFSignatureRequest</code> to work on
   *                (contained in the 0th element of the array).
   * @return A <code>VerifyPDFSignatureResponse</code> as the only element of the
   *         <code>Element</code> array.
   * @throws AxisFault An error occurred during handling of the message.
   */
  public Element[] VerifyPDFSignatureRequest(Element[] request)
      throws AxisFault {
    final CMSSignatureVerificationInvoker invoker =
        CMSSignatureVerificationInvoker.getInstance();
    final Element[] response = new Element[1];

    try {

      // create a parser and builder for binding API objects to/from XML
      final VerifyCMSSignatureRequestParser requestParser =
          new VerifyCMSSignatureRequestParser();
      final VerifyPDFSignatureResponseBuilder responseBuilder =
          new VerifyPDFSignatureResponseBuilder();
      Element reparsedReq;
      VerifyCMSSignatureRequest requestObj;
      VerifyCMSSignatureResponse responseObj;
      // create a parser and builder for binding API objects to/from XML
      /*
       * VerifyPDFRequestParser requestParser = new VerifyPDFRequestParser();
       * VerifyPDFResponseBuilder responseBuilder = new VerifyPDFResponseBuilder();
       * Element reparsedReq; VerifyPDFRequest requestObj; VerifyPDFResponse
       * responseObj;
       */

      // since Axis (1.1 ff) has problem with namespaces we take the raw request
      // stored by the Axishandler.
      final TransactionContext context = TransactionContextManager.getInstance().getTransactionContext();
      // validate the request
      reparsedReq = ServiceUtils.reparseRequest(request[0]);// context.getRequest());

      // convert to API objects
      requestObj = requestParser.parsePDF(reparsedReq);

      // invoke the core logic
      responseObj = invoker.verifyCMSSignature(requestObj);

      // map back to XML
      response[0] = responseBuilder.build(responseObj).getDocumentElement();

      // save response in transaction
      context.setResponse(response[0]);

    } catch (final MOAException e) {
      final AxisFault fault = AxisFault.makeFault(e);
      fault.setFaultDetail(new Element[] { e.toErrorResponse() });
      Logger.debug("Anfrage zur Signaturpruefung wurde nicht erfolgreich beendet:"
          + System.getProperty("line.separator") + StreamUtils.getStackTraceAsString(e));
      throw fault;
    } catch (final Throwable t) {
      final MOASystemException e = new MOASystemException("2900", null, t);
      final AxisFault fault = AxisFault.makeFault(e);
      fault.setFaultDetail(new Element[] { e.toErrorResponse() });
      Logger.debug("Anfrage zur Signaturpruefung wurde nicht erfolgreich beendet:"
          + System.getProperty("line.separator") + StreamUtils.getStackTraceAsString(e));
      throw fault;
    }

    return response;
  }

  /**
   * Handle a <code>VerifyPDFSignatureRequest</code>.
   *
   * @param request The <code>VerifyPDFSignatureRequest</code> to work on
   *                (contained in the 0th element of the array).
   * @return A <code>VerifyPDFSignatureResponse</code> as the only element of the
   *         <code>Element</code> array.
   * @throws AxisFault An error occurred during handling of the message.
   */
  public Element[] VerifyASICSignatureRequest(Element[] request)
      throws AxisFault {
    final CMSSignatureVerificationInvoker invoker =
        CMSSignatureVerificationInvoker.getInstance();
    final Element[] response = new Element[1];

    try {

      // create a parser and builder for binding API objects to/from XML
      final VerifyASICSignatureRequestParser requestParser =
          new VerifyASICSignatureRequestParser();
      final VerifyASICSignatureResponseBuilder responseBuilder =
          new VerifyASICSignatureResponseBuilder();
      Element reparsedReq;
      VerifyASiCRequest requestObj;
      final VerifyCMSSignatureResponse responseObj;
      // create a parser and builder for binding API objects to/from XML

      // since Axis (1.1 ff) has problem with namespaces we take the raw request
      // stored by the Axishandler.
      final TransactionContext context = TransactionContextManager.getInstance().getTransactionContext();
      // validate the request
      reparsedReq = ServiceUtils.reparseRequest(request[0]);// context.getRequest());

      // convert to API objects
      requestObj = requestParser.parseASIC(reparsedReq);

      if (requestObj.getFormat() == null) {
        throw new MOAApplicationException("asic.0006", null);
      }

      final ASiC aSiC = ASiCFactory.parseASiC(requestObj.getAsicInput(),
          requestObj.getFormat());

      Logger.debug("Got ASiC " + aSiC);

      // invoke the core logic
      final ASiCMOAVerifier v = new ASiCMOAVerifier();
      final List<ASiCVerificationResult> results = v.verify(aSiC,
          requestObj.getTrustProfile(), requestObj.getDate());

      // map back to XML
      response[0] = responseBuilder.build(results).getDocumentElement();

      // save response in transaction
      context.setResponse(response[0]);

    } catch (final MOAException e) {
      final AxisFault fault = AxisFault.makeFault(e);
      fault.setFaultDetail(new Element[] { e.toErrorResponse() });
      Logger.debug("Anfrage zur Signaturpruefung wurde nicht erfolgreich beendet:"
          + System.getProperty("line.separator") + StreamUtils.getStackTraceAsString(e));
      throw fault;
    } catch (final Throwable t) {
      final MOASystemException e = new MOASystemException("2900", null, t);
      final AxisFault fault = AxisFault.makeFault(e);
      fault.setFaultDetail(new Element[] { e.toErrorResponse() });
      Logger.debug("Anfrage zur Signaturpruefung wurde nicht erfolgreich beendet:"
          + System.getProperty("line.separator") + StreamUtils.getStackTraceAsString(e));
      throw fault;
    }

    return response;
  }

  /**
   * Handle a <code>VerifyCMSSignatureRequest</code>.
   *
   * @param request The <code>VerifyCMSSignatureRequest</code> to work on
   *                (contained in the 0th element of the array).
   * @return A <code>VerifyCMSSignatureResponse</code> as the only element of the
   *         <code>Element</code> array.
   * @throws AxisFault An error occurred during handling of the message.
   */
  public Element[] VerifyCMSSignatureRequest(Element[] request)
      throws AxisFault {
    final CMSSignatureVerificationInvoker invoker =
        CMSSignatureVerificationInvoker.getInstance();
    final Element[] response = new Element[1];

    try {

      // create a parser and builder for binding API objects to/from XML
      final VerifyCMSSignatureRequestParser requestParser =
          new VerifyCMSSignatureRequestParser();
      final VerifyCMSSignatureResponseBuilder responseBuilder =
          new VerifyCMSSignatureResponseBuilder();
      Element reparsedReq;
      VerifyCMSSignatureRequest requestObj;
      VerifyCMSSignatureResponse responseObj;

      // since Axis (1.1 ff) has problem with namespaces we take the raw request
      // stored by the Axishandler.
      final TransactionContext context = TransactionContextManager.getInstance().getTransactionContext();
      // validate the request
      reparsedReq = ServiceUtils.reparseRequest(request[0]);// context.getRequest());

      // convert to API objects
      requestObj = requestParser.parse(reparsedReq);

      // invoke the core logic
      responseObj = invoker.verifyCMSSignature(requestObj);

      // map back to XML
      response[0] = responseBuilder.build(responseObj).getDocumentElement();

      // save response in transaction
      context.setResponse(response[0]);

    } catch (final MOAException e) {
      final AxisFault fault = AxisFault.makeFault(e);
      fault.setFaultDetail(new Element[] { e.toErrorResponse() });
      Logger.debug("Anfrage zur Signaturpruefung wurde nicht erfolgreich beendet:"
          + System.getProperty("line.separator") + StreamUtils.getStackTraceAsString(e));
      throw fault;
    } catch (final Throwable t) {
      final MOASystemException e = new MOASystemException("2900", null, t);
      final AxisFault fault = AxisFault.makeFault(e);
      fault.setFaultDetail(new Element[] { e.toErrorResponse() });
      Logger.debug("Anfrage zur Signaturpruefung wurde nicht erfolgreich beendet:"
          + System.getProperty("line.separator") + StreamUtils.getStackTraceAsString(e));
      throw fault;
    }

    return response;
  }

  /**
   * Handle a <code>VerifyXMLSignatureRequest</code>.
   *
   * @param request The <code>VerifyXMLSignatureRequest</code> to work on
   *                (contained in the 0th element of the array).
   * @return A <code>VerifyXMLSignatureResponse</code> as the only element of the
   *         <code>Element</code> array.
   * @throws AxisFault An error occurred during handling of the message.
   */
  public Element[] VerifyXMLSignatureRequest(Element[] request)
      throws AxisFault {
    final XMLSignatureVerificationInvoker invoker =
        XMLSignatureVerificationInvoker.getInstance();
    final Element[] response = new Element[1];

    try {

      // create a parser and builder for binding API objects to/from XML
      final VerifyXMLSignatureRequestParser requestParser =
          new VerifyXMLSignatureRequestParser();
      final VerifyXMLSignatureResponseBuilder responseBuilder =
          new VerifyXMLSignatureResponseBuilder();
      Element reparsedReq;
      VerifyXMLSignatureRequest requestObj;
      VerifyXMLSignatureResponse responseObj;

      // since Axis (1.1 ff) has problem with namespaces we take the raw request
      // stored by the Axishandler.
      final TransactionContext context = TransactionContextManager.getInstance().getTransactionContext();
      // validate the request
      reparsedReq = ServiceUtils.reparseRequest(context.getRequest());

      // convert to API objects
      requestObj = requestParser.parse(reparsedReq);

      // invoke the core logic
      responseObj = invoker.verifyXMLSignature(requestObj);

      // map back to XML
      response[0] = responseBuilder.build(responseObj).getDocumentElement();

      // save response in transaction
      context.setResponse(response[0]);

    } catch (final MOAException e) {
      final AxisFault fault = AxisFault.makeFault(e);
      fault.setFaultDetail(new Element[] { e.toErrorResponse() });
      Logger.debug("Anfrage zur Signaturpruefung wurde nicht erfolgreich beendet:"
          + System.getProperty("line.separator") + StreamUtils.getStackTraceAsString(e));
      throw fault;
    } catch (final Throwable t) {
      final MOASystemException e = new MOASystemException("2900", null, t);
      final AxisFault fault = AxisFault.makeFault(e);
      fault.setFaultDetail(new Element[] { e.toErrorResponse() });
      Logger.debug("Anfrage zur Signaturpruefung wurde nicht erfolgreich beendet:"
          + System.getProperty("line.separator") + StreamUtils.getStackTraceAsString(e));
      throw fault;
    }

    return response;
  }

}