/*
 * 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.map.service.lsm;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import org.mobicents.protocols.asn.AsnException;
import org.mobicents.protocols.asn.AsnInputStream;
import org.mobicents.protocols.asn.AsnOutputStream;
import org.mobicents.protocols.asn.Tag;
import org.mobicents.protocols.ss7.map.api.MAPException;
import org.mobicents.protocols.ss7.map.api.MAPParsingComponentException;
import org.mobicents.protocols.ss7.map.api.MAPParsingComponentExceptionReason;
import org.mobicents.protocols.ss7.map.api.service.lsm.Area;
import org.mobicents.protocols.ss7.map.api.service.lsm.AreaList;
import org.mobicents.protocols.ss7.map.primitives.MAPAsnPrimitive;

/**
 * @author amit bhayani
 * 
 */
public class AreaListImpl implements AreaList, MAPAsnPrimitive {

	private Area[] areas = null;

	/**
	 * 
	 */
	public AreaListImpl() {
		super();
	}

	/**
	 * @param areas
	 */
	public AreaListImpl(Area[] areas) {
		super();
		this.areas = areas;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.mobicents.protocols.ss7.map.api.service.lsm.AreaList#getAreas()
	 */
	@Override
	public Area[] getAreas() {
		return this.areas;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.mobicents.protocols.ss7.map.api.primitives.MAPAsnPrimitive#getTag()
	 */
	@Override
	public int getTag() throws MAPException {
		return Tag.SEQUENCE;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.mobicents.protocols.ss7.map.api.primitives.MAPAsnPrimitive#getTagClass
	 * ()
	 */
	@Override
	public int getTagClass() {
		return Tag.CLASS_UNIVERSAL;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.mobicents.protocols.ss7.map.api.primitives.MAPAsnPrimitive#getIsPrimitive
	 * ()
	 */
	@Override
	public boolean getIsPrimitive() {
		return false;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.mobicents.protocols.ss7.map.api.primitives.MAPAsnPrimitive#decodeAll
	 * (org.mobicents.protocols.asn.AsnInputStream)
	 */
	@Override
	public void decodeAll(AsnInputStream ansIS) throws MAPParsingComponentException {
		try {
			int length = ansIS.readLength();
			this._decode(ansIS, length);
		} catch (IOException e) {
			throw new MAPParsingComponentException("IOException when decoding ReportSMDeliveryStatusRequest: " + e.getMessage(), e,
					MAPParsingComponentExceptionReason.MistypedParameter);
		} catch (AsnException e) {
			throw new MAPParsingComponentException("AsnException when decoding ReportSMDeliveryStatusRequest: " + e.getMessage(), e,
					MAPParsingComponentExceptionReason.MistypedParameter);
		}
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.mobicents.protocols.ss7.map.api.primitives.MAPAsnPrimitive#decodeData
	 * (org.mobicents.protocols.asn.AsnInputStream, int)
	 */
	@Override
	public void decodeData(AsnInputStream ansIS, int length) throws MAPParsingComponentException {
		try {
			this._decode(ansIS, length);
		} catch (IOException e) {
			throw new MAPParsingComponentException("IOException when decoding ReportSMDeliveryStatusRequest: " + e.getMessage(), e,
					MAPParsingComponentExceptionReason.MistypedParameter);
		} catch (AsnException e) {
			throw new MAPParsingComponentException("AsnException when decoding ReportSMDeliveryStatusRequest: " + e.getMessage(), e,
					MAPParsingComponentExceptionReason.MistypedParameter);
		}
	}

	private void _decode(AsnInputStream asnIS, int length) throws MAPParsingComponentException, IOException, AsnException {
		AsnInputStream ais = asnIS.readSequenceStreamData(length);
		
		List<Area> arealList = new ArrayList<Area>();
		
		while (true) {
			if (ais.available() == 0)
				break;

			int tag = ais.readTag();

			if (ais.getTagClass() != Tag.CLASS_UNIVERSAL || ais.isTagPrimitive() || tag != Tag.SEQUENCE) {
				throw new MAPParsingComponentException("Error while decoding AreaList: bad tag class, tag or not primitive",
						MAPParsingComponentExceptionReason.MistypedParameter);
			}
			
			Area a = new AreaImpl();
			((AreaImpl)a).decodeAll(ais);
			
			arealList.add(a);

		}//end of while
		
		this.areas = new Area[arealList.size()];
		this.areas = arealList.toArray(this.areas);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.mobicents.protocols.ss7.map.api.primitives.MAPAsnPrimitive#encodeAll
	 * (org.mobicents.protocols.asn.AsnOutputStream)
	 */
	@Override
	public void encodeAll(AsnOutputStream asnOs) throws MAPException {
		this.encodeAll(asnOs, Tag.CLASS_UNIVERSAL, Tag.SEQUENCE);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.mobicents.protocols.ss7.map.api.primitives.MAPAsnPrimitive#encodeAll
	 * (org.mobicents.protocols.asn.AsnOutputStream, int, int)
	 */
	@Override
	public void encodeAll(AsnOutputStream asnOs, int tagClass, int tag) throws MAPException {
		try {
			asnOs.writeTag(tagClass, false, tag);
			int pos = asnOs.StartContentDefiniteLength();
			this.encodeData(asnOs);
			asnOs.FinalizeContent(pos);
		} catch (AsnException e) {
			throw new MAPException("AsnException when encoding reportSMDeliveryStatusRequest: " + e.getMessage(), e);
		}
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.mobicents.protocols.ss7.map.api.primitives.MAPAsnPrimitive#encodeData
	 * (org.mobicents.protocols.asn.AsnOutputStream)
	 */
	@Override
	public void encodeData(AsnOutputStream asnOs) throws MAPException {
		if (this.areas == null || this.areas.length == 0) {
			throw new MAPException("Error while encoding AreaList the mandatory parameter[Area[]] is not defined");
		}
		
		for (int count = 0; count < areas.length; count++) {
			((AreaImpl)areas[count]).encodeAll(asnOs);
		}
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + Arrays.hashCode(areas);
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		AreaListImpl other = (AreaListImpl) obj;
		if (!Arrays.equals(areas, other.areas))
			return false;
		return true;
	}

}