/**
 * @author cramakrishnan
 *
 * Copyright (C) 2003, C. Ramakrishnan / Illposed Software
 * All rights reserved.
 * 
 * See license.txt (or license.rtf) for license information.
 * 
 *
 * OscBundle represents a collection of OscPackets.
 *
 * Use this when you want to send a bunch of OscPackets
 * in one go.
 *
 * Internally, I use Vector to maintain jdk1.1 compatability
 */

package com.illposed.osc;
import java.math.BigInteger;
import java.util.Date;
import java.util.Enumeration;
import java.util.GregorianCalendar;
import java.util.Vector;

import com.illposed.osc.utility.*;

public class OSCBundle extends OSCPacket {

    protected Date timestamp;
    //    protected OSCPacket[] packets;
    protected Vector<OSCPacket> packets;
    public static final BigInteger SECONDS_FROM_1900_to_1970 =
        new BigInteger("2208988800");
    // 17 leap years

    /**
     * Create a new OSCBundle, with a timestamp of now.
     * You can add packets to the bundle with addPacket()
     */
    public OSCBundle() {
        this(null, GregorianCalendar.getInstance().getTime());
    }
    
    /**
     * Create an OSCBundle with the specified timestamp
     * @param timestamp
     */
    public OSCBundle(Date timestamp) {
        this(null, timestamp);
    }

    /**
     * @param newPackets Array of OSCPackets to initialize this object with
     */
    public OSCBundle(OSCPacket[] newPackets) {
        this(newPackets, GregorianCalendar.getInstance().getTime());
    }

    /**
     * @param newPackets OscPacket[]
     * @param time java.lang.Time
     */
    public OSCBundle(OSCPacket[] newPackets, Date newTimestamp) {
        super();
        if (null != newPackets) {
            packets = new Vector<OSCPacket>(newPackets.length);
            for (int i = 0; i < newPackets.length; i++) {
                packets.add(newPackets[i]);
            }
        } else
            packets = new Vector<OSCPacket>();
        timestamp = newTimestamp;
        init();
    }
    
    /**
     * Return the timestamp for this bundle
     * @return a Date
     */
    public Date getTimestamp() {
        return timestamp;
    }
    
    /**
     * Set the timestamp for this bundle
     * @param timestamp
     */
    public void setTimestamp(Date timestamp) {
        this.timestamp = timestamp;
    }
    
    /**
     * Add a packet to the list of packets in this bundle
     * @param packet
     */
    public void addPacket(OSCPacket packet) {
        packets.add(packet);
    }
    
    /**
     * Get the packets contained in this bundle
     * @return an array of packets
     */
    public OSCPacket[] getPackets() {
        OSCPacket[] packetArray = new OSCPacket[packets.size()];
        packets.toArray(packetArray);
        return packetArray;
    }

    protected void computeTimeTagByteArray(OSCJavaToByteArrayConverter stream) {
        long millisecs = timestamp.getTime();
        long secsSince1970 = (long) (millisecs / 1000);
        long secs = secsSince1970 + SECONDS_FROM_1900_to_1970.longValue();
        long picosecs = (long) (millisecs - (secsSince1970 * 1000)) * 1000;
        
        stream.write((int) secs);
        stream.write((int) picosecs);

    }

    /**
     * @param stream OscPacketByteArrayConverter
     */
    protected void computeByteArray(OSCJavaToByteArrayConverter stream) {
        stream.write("#bundle");
        computeTimeTagByteArray(stream);
        Enumeration enm = packets.elements();
        OSCPacket nextElement;
        byte[] packetBytes;
        while (enm.hasMoreElements()) {
            nextElement = (OSCPacket) enm.nextElement();
            packetBytes = nextElement.getByteArray();
            stream.write(packetBytes.length);
            stream.write(packetBytes);
        }
        byteArray = stream.toByteArray();
    }

}