/*
 * JBoss, Home of Professional Open Source
 * Copyright 2011, Red Hat, Inc. and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This 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 software 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 software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.mobicents.protocols.ss7.m3ua.impl.parameter;

import java.util.Arrays;

import javolution.xml.XMLFormat;
import javolution.xml.XMLSerializable;
import javolution.xml.stream.XMLStreamException;

import org.mobicents.protocols.ss7.m3ua.parameter.OPCList;
import org.mobicents.protocols.ss7.m3ua.parameter.Parameter;

/**
 * 
 * @author amit bhayani
 * 
 */
public class OPCListImpl extends ParameterImpl implements OPCList, XMLSerializable {

	private static final String OPC = "opc";
	private static final String MASK = "mask";
	private static final String ARRAY_SIZE = "size";

	private byte[] value;
	private int[] pointCodes;
	private short[] masks;
	
	public OPCListImpl(){
		this.tag = Parameter.Originating_Point_Code_List;
	}

	protected OPCListImpl(byte[] value) {
		this.tag = Parameter.Originating_Point_Code_List;

		int count = 0;
		int arrSize = 0;
		pointCodes = new int[(value.length / 4)];
		masks = new short[(value.length / 4)];

		while (count < value.length) {
			masks[arrSize] = value[count++];

			pointCodes[arrSize] = 0;
			pointCodes[arrSize] |= value[count++] & 0xFF;
			pointCodes[arrSize] <<= 8;
			pointCodes[arrSize] |= value[count++] & 0xFF;
			pointCodes[arrSize] <<= 8;
			pointCodes[arrSize++] |= value[count++] & 0xFF;
		}
		this.value = value;
	}

	protected OPCListImpl(int[] pointCodes, short[] masks) {
		this.tag = Parameter.Originating_Point_Code_List;
		this.pointCodes = pointCodes;
		this.masks = masks;
		encode();
	}

	private void encode() {
		// create byte array taking into account data, point codes and
		// indicators;

		this.value = new byte[(pointCodes.length * 4)];

		int count = 0;
		int arrSize = 0;
		// encode routing context
		while (count < value.length) {
			value[count++] = (byte) (masks[arrSize]);

			value[count++] = (byte) (pointCodes[arrSize] >>> 16);
			value[count++] = (byte) (pointCodes[arrSize] >>> 8);
			value[count++] = (byte) (pointCodes[arrSize++]);
		}
	}

	@Override
	protected byte[] getValue() {
		return this.value;
	}

	public short[] getMasks() {
		return this.masks;
	}

	public int[] getPointCodes() {
		return this.pointCodes;
	}

	@Override
	public String toString() {
		return String.format("OPCList pointCode=%s mask=%s", Arrays.toString(this.pointCodes),
				Arrays.toString(this.masks));
	}

	/**
	 * XML Serialization/Deserialization
	 */
	protected static final XMLFormat<OPCListImpl> RC_XML = new XMLFormat<OPCListImpl>(OPCListImpl.class) {

		@Override
		public void read(javolution.xml.XMLFormat.InputElement xml, OPCListImpl opc) throws XMLStreamException {
			int size = xml.getAttribute(ARRAY_SIZE).toInt();
			opc.pointCodes = new int[size];
			opc.masks = new short[size];

			for (int i = 0; i < opc.pointCodes.length; i++) {
				opc.pointCodes[i] = xml.get(OPC);
			}

			for (int i = 0; i < opc.masks.length; i++) {
				opc.masks[i] = xml.get(MASK);
			}
			
			opc.encode();

		}

		@Override
		public void write(OPCListImpl opc, javolution.xml.XMLFormat.OutputElement xml) throws XMLStreamException {
			xml.setAttribute(ARRAY_SIZE, opc.pointCodes.length);
			for (int i : opc.pointCodes) {
				xml.add(i, OPC);
			}

			for (short s : opc.masks) {
				xml.add(s, MASK);
			}
		}
	};
}