/*
 * Created on 20.11.2003
 *
 * (c) Stabsstelle IKT-Strategie des Bundes
 */
package at.gv.egovernment.moa.spss.slinterface.transformers;

import java.util.ArrayList;
import java.util.HashMap;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import at.gv.egovernment.moa.spss.slinterface.Constants;

/**
 * @author Gregor Karlinger (mailto:gregor.karlinger@cio.gv.at) 
 */
public class MOA2SL
{
  /**
   * Transforms an MOA VerifyXMLSignatureResponse into a SL VerifyXMLSignatureResponse.
   * 
   * @param moaVerifyXMLSignatureResponse The MOA VerifyXMLSignatureResponse to be transformed.
   * 
   * @return the specified response document, transformed into a SL VerifyXMLSignatureResponse. Please note
   *         that <code>moaVerifyXMLSignatureResponse</code> is modified into the sl response.   
   * 
   * @pre moaVerifyXMLSignatureResponse is a valid instance of the SL Schema (version 1.2 or 1.1).
   */
  public static Document toSlVerifyXMLSignatureResponse(Document moaVerifyXMLSignatureResponse)
  {
    // Namespace to namespace prefix mapping
    HashMap prefixMap = new HashMap(4);
    prefixMap.put(Constants.NSURI_SL_10_, Constants.NSPRE_SL_10_);
    prefixMap.put(Constants.NSURI_SL_11_, Constants.NSPRE_SL_11_);
    prefixMap.put(Constants.NSURI_SL_12_, Constants.NSPRE_SL_12_);
    prefixMap.put(Constants.NSURI_MOA_12_, Constants.NSPRE_MOA_12_);

    // Namespaces to be changed
    HashMap nsTransforms = new HashMap();
    nsTransforms.put(Constants.NSURI_MOA_12_, Constants.NSURI_SL_11_);
    
    // Names to be changed
    HashMap nameTransforms = new HashMap();
    nameTransforms.put(
      new QName(Constants.NSURI_MOA_12_, "PublicAuthority"), 
      new QName(Constants.NSURI_MOA_12_,"PublicAuthority"));
    
    Element verifyResponseElem = moaVerifyXMLSignatureResponse.getDocumentElement();
    verifyResponseElem.setAttributeNS(Constants.NSURI_NAMESPACES_, 
      "xmlns:" + Constants.NSPRE_SL_10_, Constants.NSURI_SL_10_);
    verifyResponseElem.setAttributeNS(Constants.NSURI_NAMESPACES_, 
      "xmlns:" + Constants.NSPRE_SL_11_, Constants.NSURI_SL_11_);

    // Convert SL request into MOA request
    verifyResponseElem =
      Utils.transformDeep(verifyResponseElem, prefixMap, nsTransforms, nameTransforms);

    // Add  SignatureManifestCheck element (Code = 98)
    Element signatureMFCheckElem = moaVerifyXMLSignatureResponse.createElementNS(
      Constants.NSURI_SL_11_, Constants.NSPRE_SL_11_ + ":SignatureManifestCheck");
    Element smfCodeElem = moaVerifyXMLSignatureResponse.createElementNS(
    Constants.NSURI_SL_11_, Constants.NSPRE_SL_11_ + ":Code");  
    signatureMFCheckElem.appendChild(smfCodeElem);
    smfCodeElem.appendChild(moaVerifyXMLSignatureResponse.createTextNode("98"));
    Element signatureCheckElem = (Element) verifyResponseElem.getElementsByTagNameNS(
      Constants.NSURI_SL_11_, "SignatureCheck").item(0);
    verifyResponseElem.insertBefore(signatureMFCheckElem, signatureCheckElem.getNextSibling());
    
    // Siblings of Certificate check must be in sl10 namespace
    nsTransforms.clear();
    nsTransforms.put(Constants.NSURI_SL_11_, Constants.NSURI_SL_10_);
    nameTransforms.clear();
    Element certCheckElem = (Element) verifyResponseElem.getElementsByTagNameNS(
      Constants.NSURI_SL_11_, "CertificateCheck").item(0);
    NodeList certCheckChildren = certCheckElem.getChildNodes();
    ArrayList certCheckChildElemsList = new ArrayList(certCheckChildren.getLength());
    for (int i = 0; i < certCheckChildren.getLength(); i++) 
    {
      Node currentNode = certCheckChildren.item(i);
      if (currentNode.getNodeType() == Node.ELEMENT_NODE)
      certCheckChildElemsList.add(certCheckChildren.item(i));
    } 
    for (int i = 0; i < certCheckChildElemsList.size(); i++)
      Utils.transformDeep((Element) certCheckChildElemsList.get(i), prefixMap, nsTransforms, 
        nameTransforms);      
      
    return moaVerifyXMLSignatureResponse; 
  }
}