/*
    This file is part of Peers, a java SIP softphone.

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
    
    Copyright 2007, 2008, 2009, 2010 Yohann Martineau 
*/

package peers.sdp;

import lombok.Getter;
import lombok.Setter;

import java.net.Inet4Address;
import java.net.Inet6Address;
import java.net.InetAddress;
import java.util.Hashtable;
import java.util.List;

@Getter @Setter
public class SessionDescription {
	private long id;
	private long version;
	private String name;
	private String username;

    private InetAddress ipAddress;
	private List<MediaDescription> mediaDescriptions;
    private Hashtable<String, String> attributes;

    
    @Override
    public String toString() {
        StringBuilder buf = new StringBuilder();
        buf.append("v=0\r\n");
        buf.append("o=").append(username).append(" ").append(id);
        buf.append(" ").append(version);
        int ipVersion;
        if (ipAddress instanceof Inet4Address) {
            ipVersion = 4;
        } else if (ipAddress instanceof Inet6Address) {
            ipVersion = 6;
        } else {
            throw new RuntimeException("unknown ip version: " + ipAddress);
        }
        buf.append(" IN IP").append(ipVersion).append(" ");
        String hostAddress = ipAddress.getHostAddress();
        buf.append(hostAddress).append("\r\n");
        buf.append("s=").append(name).append("\r\n");
        buf.append("c=IN IP").append(ipVersion).append(" ");
        buf.append(hostAddress).append("\r\n");
        buf.append("t=0 0\r\n");
        for (String attributeName: attributes.keySet()) {
            String attributeValue = attributes.get(attributeName);
            buf.append("a=").append(attributeName);
            if (attributeValue != null && !attributeValue.trim().isEmpty()) {
                buf.append(":");
                buf.append(attributeValue);
                buf.append("\r\n");
            }
        }
        for (MediaDescription mediaDescription: mediaDescriptions) {
            buf.append(mediaDescription.toString());
        }
        return buf.toString();
    }
}