/*
 * Entagged Audio Tag library
 * Copyright (c) 2003-2005 Rapha�l Slinckx <raphael@slinckx.net>
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *  
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
package entagged.audioformats.mp3.util.id3frames;


import java.io.UnsupportedEncodingException;

import entagged.audioformats.generic.TagField;

public class UfidId3Frame extends Id3Frame {
	
	private String ownerId;
	private byte[] identifier;
	
	/*
	 * 0,1| frame flags
	 * 2,..,0X00| Owner ID
	 * xx,...| identifier (binary)
	 */
	
	public UfidId3Frame(byte[] raw, byte version) throws UnsupportedEncodingException {
		super(raw, version);
	}
	
	protected void populate(byte[] raw) {
		int i = indexOfFirstNull(raw, flags.length);
		
		if(i != -1)
			this.ownerId = new String(raw, flags.length, i-flags.length);
		else {
			this.ownerId = new String(raw, flags.length, raw.length-flags.length);
			this.identifier = new byte[0];
		}
		
		this.identifier = new byte[raw.length - i - 1];
		for(int j = 0; j<identifier.length; j++)
			this.identifier[j] = raw[i+1+j];
		
	}
	
	protected byte[] build() {
		byte[] own = this.ownerId.getBytes();
		
		//the return byte[]
		byte[] b = new byte[4 + 4 + flags.length + own.length + 1 + identifier.length];
		
		int offset = 0;
		copy(getIdBytes(), b, offset);        offset += 4;
		copy(getSize(b.length-10), b, offset); offset += 4;
		copy(flags, b, offset);               offset += flags.length;
		
		copy(own, b, offset);		offset += own.length;
		
		b[offset] = 0; 				offset += 1;
		
		copy(identifier, b, offset);
		
		return b;
	}
	
	public boolean isBinary() {
		return true;
	}
	
	public String getOwnerId() {
		return this.ownerId;
	}
	
	public byte[] getIdentifier() {
		return this.identifier;
	}
	
	public String getId() {
		return "UFID";
	}
	
	public boolean isCommon() {
		return false;
	}
	
	public void copyContent(TagField field) {
	    if(field instanceof UfidId3Frame) {
	        this.ownerId = ((UfidId3Frame)field).getOwnerId();
	        this.identifier = ((UfidId3Frame)field).getIdentifier();
	    }
	}
	
	public boolean isEmpty() {
	    return this.ownerId.equals("") || this.identifier.length == 0;
	}
	
	public String toString() {
		return "UFID : "+getOwnerId();
	}
	
	/*
	public static void main(String[] args) throws Exception {
		byte[][] content = {
				{0x00, 0x00, 'T','e','T',0x00,0x01,0x02},
				{0x00, 0x00, 'T','e','T',0x00}
		};
		
		for(int i = 0; i<content.length; i++) {
			UfidId3Frame t = new UfidId3Frame(content[i], Id3v2Tag.ID3V23);
			System.out.println("-------");
			System.out.println(t.isBinary());
			System.out.println(t.getOwnerId());
			byte[] id = t.getIdentifier();
			for(int j = 0; j<id.length; j++)
				System.out.print(Integer.toHexString(id[j]&0xFF)+"|");
			System.out.println();
			System.out.println(t.getId());
			
			id = t.build();
			for(int j = 0; j<id.length; j++)
				System.out.print(Integer.toHexString(id[j]&0xFF)+"|");
		}
	}
	*/
}