/*
 * 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 at.gv.egiz.asic.api.ASiC;
import at.gv.egiz.asic.api.ASiCFactory;
import at.gv.egiz.asic.api.ASiCFormat;
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 org.apache.axis.AxisFault;
import org.w3c.dom.Element;

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;

import java.io.FileInputStream;
import java.util.List;

/**
 * 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 {
		CMSSignatureVerificationInvoker invoker =
			      CMSSignatureVerificationInvoker.getInstance();
	    Element[] response = new Element[1];
	    
	    try {
	       
	    	// create a parser and builder for binding API objects to/from XML
	        VerifyCMSSignatureRequestParser requestParser =
	          new VerifyCMSSignatureRequestParser();
	        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.
	      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 (MOAException e) {
	      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 (Throwable t) {
	      MOASystemException e = new MOASystemException("2900", null, t);
	      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 {
        CMSSignatureVerificationInvoker invoker =
                CMSSignatureVerificationInvoker.getInstance();
        Element[] response = new Element[1];

        try {

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

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

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

            // invoke the core logic
            ASiCMOAVerifier v = new ASiCMOAVerifier();
            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 (MOAException e) {
            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 (Throwable t) {
            MOASystemException e = new MOASystemException("2900", null, t);
            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 {
    CMSSignatureVerificationInvoker invoker =
      CMSSignatureVerificationInvoker.getInstance();
    Element[] response = new Element[1];
    
    try {
             
      // create a parser and builder for binding API objects to/from XML
      VerifyCMSSignatureRequestParser requestParser =
        new VerifyCMSSignatureRequestParser();
      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.
      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 (MOAException e) {
      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 (Throwable t) {
      MOASystemException e = new MOASystemException("2900", null, t);
      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 {
    XMLSignatureVerificationInvoker invoker =
      XMLSignatureVerificationInvoker.getInstance();
    Element[] response = new Element[1];

    try {
    	
        // create a parser and builder for binding API objects to/from XML
      VerifyXMLSignatureRequestParser requestParser =
        new VerifyXMLSignatureRequestParser();
      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.
      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 (MOAException e) {
      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 (Throwable t) {
      MOASystemException e = new MOASystemException("2900", null, t);
      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;
  }

}