/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

package org.apache.harmony.auth.internal.kerberos.v5;

import java.io.IOException;
import java.util.Date;

import org.apache.harmony.auth.internal.nls.Messages;
import org.apache.harmony.security.asn1.ASN1Any;
import org.apache.harmony.security.asn1.ASN1Constants;
import org.apache.harmony.security.asn1.ASN1Explicit;
import org.apache.harmony.security.asn1.ASN1Integer;
import org.apache.harmony.security.asn1.ASN1OctetString;
import org.apache.harmony.security.asn1.ASN1Sequence;
import org.apache.harmony.security.asn1.ASN1StringType;
import org.apache.harmony.security.asn1.ASN1Type;
import org.apache.harmony.security.asn1.BerInputStream;
import org.apache.harmony.security.asn1.DerInputStream;

/**
 * Kerberos Error Message type.
 * 
 * @see http://www.ietf.org/rfc/rfc4120.txt
 */
public class KerberosErrorMessage {

	public static KerberosErrorMessage decode(DerInputStream in)
			throws IOException {

		return (KerberosErrorMessage) ASN1.decode(in);
	}

	private Date ctime;

	private int cusec;

	private Date stime;

	private int susec;

	private int errorCode;

	private String crealm;

	private PrincipalName cname;

	private String realm;

	private PrincipalName sname;

	private String etext;

	private static final ASN1Sequence KRB_ERROR = new ASN1Sequence(
			new ASN1Type[] { new ASN1Explicit(0, ASN1Any.getInstance()), // TODO:ignored
					new ASN1Explicit(1, ASN1Any.getInstance()), // TODO: ignored
					new ASN1Explicit(2, KerberosTime.getASN1()),// ctime
					// TODO should we define Microseconds type?
					new ASN1Explicit(3, ASN1Integer.getInstance()), // cusec
					new ASN1Explicit(4, KerberosTime.getASN1()),// stime
					// TODO should we define Microseconds type?
					new ASN1Explicit(5, ASN1Integer.getInstance()), // susec
					// TODO should we define Int32 type?
					new ASN1Explicit(6, ASN1Integer.getInstance()),// error-code
					// TODO should we define Realm type?
					new ASN1Explicit(7, ASN1StringType.GENERALSTRING),// crealm
					new ASN1Explicit(8, PrincipalName.ASN1),// cname
					// TODO should we define Realm type?
					new ASN1Explicit(9, ASN1StringType.GENERALSTRING),// realm
					new ASN1Explicit(10, PrincipalName.ASN1),// sname
					// TODO should we define KerberosString type?
					new ASN1Explicit(11, ASN1StringType.GENERALSTRING),// e-text
					// TODO: ignored
					new ASN1Explicit(12, ASN1OctetString.getInstance()),// e-data
			}) {
		{
			setOptional(2);// ctime
			setOptional(3);// cusec
			setOptional(7);// crealm
			setOptional(8);// cname
			setOptional(11);// e-text
			setOptional(12);// e-data
		}

		@Override
		protected Object getDecodedObject(BerInputStream in) throws IOException {

			final Object[] values = (Object[]) in.content;

			final KerberosErrorMessage message = new KerberosErrorMessage();

			message.ctime = (Date) values[2];
			if (values[3] != null) {
				message.cusec = ASN1Integer.toIntValue(values[3]);
			}
			message.stime = (Date) values[4];
			message.susec = ASN1Integer.toIntValue(values[5]);
			message.errorCode = ASN1Integer.toIntValue(values[6]);
			message.crealm = (String) values[7];
			message.cname = (PrincipalName) values[8];
			message.realm = (String) values[9];
			message.sname = (PrincipalName) values[10];
			message.etext = (String) values[11];

			return message;
		}

		@Override
		protected void getValues(Object object, Object[] values) {
			throw new RuntimeException(Messages.getString("auth.64"));
		}
	};

	public static final ASN1Explicit ASN1 = new ASN1Explicit(
			ASN1Constants.CLASS_APPLICATION, 30, KRB_ERROR);

	public KerberosErrorMessage() {
	}

	public PrincipalName getCname() {
		return cname;
	}

	public String getCrealm() {
		return crealm;
	}

	public Date getCtime() {
		return ctime;
	}

	public int getCusec() {
		return cusec;
	}

	public int getErrorCode() {
		return errorCode;
	}

	public String getEtext() {
		return etext;
	}

	public String getRealm() {
		return realm;
	}

	public PrincipalName getSname() {
		return sname;
	}

	public Date getStime() {
		return stime;
	}

	public int getSusec() {
		return susec;
	}
}