/*
 * Jitsi, the OpenSource Java VoIP and Instant Messaging client.
 *
 * Copyright @ 2015 Atlassian Pty Ltd
 *
 * Licensed 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 net.java.sip.communicator.impl.protocol.jabber.extensions.jingle;

import org.jivesoftware.smack.packet.*;

/**
 * SctpMap extension in transport packet extension.
 * Defined by XEP-0343: Signaling WebRTC datachannels in Jingle.
 * 
 * @author lishunyang
 * 
 */
public class SctpMapExtension
    implements PacketExtension
{
    /**
     * The name of the "sctpmap" element.
     */
    public static final String ELEMENT_NAME = "sctpmap";

    /**
     * The namespace for the "sctpmap" element.
     */
    public static final String NAMESPACE =
        "urn:xmpp:jingle:transports:dtls-sctp:1";

    /**
     * Port number of "sctpmap" element.
     */
    public static final String PORT_ATTR_NAME = "number";

    /**
     * Protocol name of "sctpmap" element.
     */
    public static final String PROTOCOL_ATTR_NAME = "protocol";

    /**
     * Number of streams of "sctpmap" element.
     */
    public static final String STREAMS_ATTR_NAME = "streams";

    /**
     * Value of "port".
     */
    private int port = -1;

    /**
     * Value of "protocol".
     * @See SctpMapExtension.Protocol
     */
    private String protocol = "";

    /**
     * Number of "streams".
     */
    private int streams = -1;

    /**
     * {@inheritDoc}
     */
    @Override
    public String getElementName()
    {
        return ELEMENT_NAME;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public String getNamespace()
    {
        return NAMESPACE;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public String toXML()
    {
        StringBuilder builder = new StringBuilder();

        builder.append("<").append(getElementName());
        builder.append(" ").append("xmlns").append("='").append(getNamespace())
            .append("'");
        builder.append(" ").append(PORT_ATTR_NAME).append("='").append(port)
            .append("'");
        builder.append(" ").append(PROTOCOL_ATTR_NAME).append("='")
            .append(protocol).append("'");
        builder.append(" ").append(STREAMS_ATTR_NAME).append("='")
            .append(streams).append("'");
        builder.append("/>");

        return builder.toString();
    }

    public void setPort(int port)
    {
        this.port = port;
    }

    public int getPort()
    {
        return port;
    }

    public void setProtocol(String protocol)
    {
        this.protocol = protocol;
    }

    public void setProtocol(Protocol protocol)
    {
        this.protocol = protocol.toString();
    }

    public String getProtocol()
    {
        return protocol;
    }

    public void setStreams(int streams)
    {
        this.streams = streams;
    }

    public int getStreams()
    {
        return streams;
    }

    /**
     * Protocol enumeration of <tt>SctpMapExtension</tt>. Currently it only
     * contains WEBRTC_CHANNEL.
     * 
     * @author lishunyang
     * 
     */
    public static enum Protocol
    {
        WEBRTC_CHANNEL("webrtc-datachannel");

        private String name;

        private Protocol(String name)
        {
            this.name = name;
        }

        @Override
        public String toString()
        {
            return name;
        }
    }
}