package at.gv.egovernment.moa.spss.server.service;

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

import at.gv.egovernment.moa.logging.Logger;
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.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.moa.util.StreamUtils;

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

  /**
   * 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(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;
  }

}