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

import iaik.pki.revocation.RevocationSourceTypes;

import java.util.HashMap;
import java.util.Map;
import java.util.StringTokenizer;

import at.gv.egovernment.moa.logging.LogMsg;
import at.gv.egovernment.moa.logging.Logger;

import at.gv.egovernment.moa.spss.util.MessageProvider;

/**
 * A class representing a CRL distribution point.
 * 
 * @author Sven Aigner
 * @author Patrick Peck
 * @version $Id$
 */
public class CRLDistributionPoint 
  extends DistributionPoint 
  implements iaik.pki.revocation.CRLDistributionPoint
{

  private static Map RC_MAPPING = new HashMap();

  static {

    // create the mapping between reason code strings and their integer values
    RC_MAPPING.put(
      "unused",
      new Integer(iaik.asn1.structures.DistributionPoint.unused));
    RC_MAPPING.put(
      "keyCompromise",
      new Integer(iaik.asn1.structures.DistributionPoint.keyCompromise));
    RC_MAPPING.put(
      "cACompromise",
      new Integer(iaik.asn1.structures.DistributionPoint.cACompromise));
    RC_MAPPING.put(
      "affiliationChanged",
      new Integer(iaik.asn1.structures.DistributionPoint.affiliationChanged));
    RC_MAPPING.put(
      "superseded",
      new Integer(iaik.asn1.structures.DistributionPoint.superseded));
    RC_MAPPING.put(
      "cessationOfOperation",
      new Integer(iaik.asn1.structures.DistributionPoint.cessationOfOperation));
    RC_MAPPING.put(
      "certificateHold",
      new Integer(iaik.asn1.structures.DistributionPoint.certificateHold));
    RC_MAPPING.put(
      "privilegeWithdrawn",
      new Integer(iaik.asn1.structures.DistributionPoint.privilegeWithdrawn));
    RC_MAPPING.put(
      "aACompromise",
      new Integer(iaik.asn1.structures.DistributionPoint.aACompromise));
  }

  /**
   * The name of the CA issuing the CRL referred to by this DP.
   */
  private String issuerName_;
  
  /** 
   * The reason codes applicable for the distribution point. 
   */
  private int reasonCodes;

  /**
   * Create a <code>CRLDistributionPoint</code>.
   * 
   * @param issuerName The name of the CA issuing the CRL referred to by this DP.
   * 
   * @param uri The URI of the distribution point.
   * 
   * @param reasonCodeStr A list of reason codes (a space-separated enumeration).
   */
  public CRLDistributionPoint(String issuerName, String uri, String reasonCodeStr) 
  {
    super(uri);
    issuerName_ = issuerName;
    this.reasonCodes = extractReasonCodes(reasonCodeStr);
  }

  /**
   * @see DistributionPoint#getType()
   */
  public String getType()
  {
    return RevocationSourceTypes.CRL;
  }
  
  /**
   * Convert a list of reason codes provided as a <code>String</code> to a
   * binary representation.
   * 
   * @param reasonCodeStr A <code>String</code> containing a blank-separated,
   * textual representation of reason codes.
   * @return int A binary representation of reason codes.
   * @see iaik.asn1.structures.DistributionPoint
   */
  private int extractReasonCodes(String reasonCodeStr) {
    int codes = 0;
    StringTokenizer tokenizer = new StringTokenizer(reasonCodeStr);
    String token;
    Integer reasonCode;

    while (tokenizer.hasMoreTokens()) {
      token = tokenizer.nextToken();
      reasonCode = (Integer) RC_MAPPING.get(token);
      if (reasonCode != null) {
        codes |= reasonCode.intValue();
      } else {
        MessageProvider msg = MessageProvider.getInstance();
        Logger.warn(
          new LogMsg(msg.getMessage("config.07", new Object[] { token })));
      }
    }

    // If reasonCodeStr is empty, set all possible reason codes
    if (codes == 0) codes = 
      iaik.asn1.structures.DistributionPoint.unused |
      iaik.asn1.structures.DistributionPoint.keyCompromise |
      iaik.asn1.structures.DistributionPoint.cACompromise |
      iaik.asn1.structures.DistributionPoint.affiliationChanged |
      iaik.asn1.structures.DistributionPoint.superseded |
      iaik.asn1.structures.DistributionPoint.cessationOfOperation |
      iaik.asn1.structures.DistributionPoint.certificateHold |
      iaik.asn1.structures.DistributionPoint.privilegeWithdrawn |
      iaik.asn1.structures.DistributionPoint.aACompromise;
    
    return codes;
  }

  /**
   * Return a binary representation of the reason codes of this distribution
   * point.
   * 
   * @return The binary representation of the reason codes.
   */
  public int getReasonCodes() {
    return reasonCodes;
  }

  /**
   * Return a <code>String</code> representation of this distribution point.
   * 
   * @return The <code>String</code> representation of this distribution point.
   * @see java.lang.Object#toString()
   */
  public String toString() {
    return "(DistributionPoint - "
      + ("URI<" + getUri())
      + ("> REASONCODES<" + getReasonCodes() + ">)");
  }

  /**
   * @see iaik.pki.revocation.CRLDistributionPoint#getIssuerName()
   */
  public String getIssuerName()
  {
    return issuerName_;
  }
}