/**
 * 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.wss4j.dom.message;

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

import org.apache.wss4j.common.util.WSCurrentTimeSource;
import org.apache.wss4j.common.util.WSTimeSource;
import org.apache.wss4j.dom.message.token.Timestamp;
import org.apache.wss4j.dom.util.WSSecurityUtil;

/**
 * Builds a WS Timestamp and inserts it into the SOAP Envelope. Refer to the WS
 * specification 1.0. chapter 10 / appendix A.2
 */

public class WSSecTimestamp extends WSSecBase {
    private static final org.slf4j.Logger LOG =
        org.slf4j.LoggerFactory.getLogger(WSSecTimestamp.class);

    private Timestamp ts;

    private int timeToLive = 300; // time between Created and Expires
    private boolean precisionInMilliSeconds = true;
    private WSTimeSource wsTimeSource = new WSCurrentTimeSource();

    public WSSecTimestamp(WSSecHeader securityHeader) {
        super(securityHeader);
    }

    public WSSecTimestamp(Document doc) {
        super(doc);
    }

    /**
     * Set the time to live. This is the time difference in seconds between the
     * <code>Created</code> and the <code>Expires</code> in
     * <code>Timestamp</code>. <p/>
     *
     * @param ttl The time to live in second
     */
    public void setTimeToLive(int ttl) {
        timeToLive = ttl;
    }

    /**
     * Creates a Timestamp element.
     *
     * The method prepares and initializes a WSSec Timestamp structure after the
     * relevant information was set. Before calling <code>prepare()</code> the
     * parameter such as <code>timeToLive</code> can be set if the default
     * value is not suitable.
     */
    public void prepare() {
        ts = new Timestamp(precisionInMilliSeconds, getDocument(), wsTimeSource, timeToLive);
        String tsId = getIdAllocator().createId("TS-", ts);
        ts.setID(tsId);
        if (addWSUNamespace) {
            ts.addWSUNamespace();
        }
    }

    /**
     * Prepends the Timestamp element to the elements already in the Security
     * header.
     *
     * The method can be called any time after <code>prepare()</code>. This
     * allows to insert the Timestamp element at any position in the Security
     * header.
     */
    public void prependToHeader() {
        Element securityHeaderElement = getSecurityHeader().getSecurityHeaderElement();
        WSSecurityUtil.prependChildElement(securityHeaderElement, ts.getElement());
    }

    /**
     * Adds a new <code>Timestamp</code> to a soap envelope.
     *
     * A complete <code>Timestamp</code> is constructed and added to the
     * <code>wsse:Security</code> header.
     *
     * @return Document with Timestamp added
     * @throws Exception
     */
    public Document build() {
        LOG.debug("Begin add timestamp...");

        prepare();
        prependToHeader();

        return getDocument();
    }

    /**
     * Get the id generated during <code>prepare()</code>.
     *
     * Returns the the value of wsu:Id attribute of this Timestamp.
     *
     * @return Return the wsu:Id of this token or null if
     *         <code>prepareToken()</code> was not called before.
     */
    public String getId() {
        if (ts == null) {
            return null;
        }
        return ts.getID();
    }

    public WSTimeSource getWsTimeSource() {
        return wsTimeSource;
    }

    public void setWsTimeSource(WSTimeSource wsTimeSource) {
        this.wsTimeSource = wsTimeSource;
    }

    /**
     * Get the timestamp element generated during <code>prepare()</code>.
     */
    public Element getElement() {
        if (ts == null) {
            return null;
        }
        return ts.getElement();
    }

    public boolean isPrecisionInMilliSeconds() {
        return precisionInMilliSeconds;
    }

    public void setPrecisionInMilliSeconds(boolean precisionInMilliSeconds) {
        this.precisionInMilliSeconds = precisionInMilliSeconds;
    }
}