/*
 * 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 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.AreaDefinition;
import org.mobicents.protocols.ss7.map.api.service.lsm.AreaEventInfo;
import org.mobicents.protocols.ss7.map.api.service.lsm.OccurrenceInfo;
import org.mobicents.protocols.ss7.map.primitives.MAPAsnPrimitive;

/**
 * @author amit bhayani
 * 
 */
public class AreaEventInfoImpl implements AreaEventInfo, MAPAsnPrimitive {
	
	private static final int _TAG_OCCURRENCE_INFO = 1;
	private static final int _TAG_INTERVAL_TIME = 2;

	private AreaDefinition areaDefinition = null;
	private OccurrenceInfo occurrenceInfo = null;
	private Integer intervalTime = null;

	/**
	 * 
	 */
	public AreaEventInfoImpl() {
		super();
		// TODO Auto-generated constructor stub
	}

	/**
	 * @param areaDefinition
	 * @param occurrenceInfo
	 * @param intervalTime
	 */
	public AreaEventInfoImpl(AreaDefinition areaDefinition, OccurrenceInfo occurrenceInfo, Integer intervalTime) {
		super();
		this.areaDefinition = areaDefinition;
		this.occurrenceInfo = occurrenceInfo;
		this.intervalTime = intervalTime;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.mobicents.protocols.ss7.map.api.service.lsm.AreaEventInfo#
	 * getAreaDefinition()
	 */
	@Override
	public AreaDefinition getAreaDefinition() {
		return this.areaDefinition;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.mobicents.protocols.ss7.map.api.service.lsm.AreaEventInfo#
	 * getOccurrenceInfo()
	 */
	@Override
	public OccurrenceInfo getOccurrenceInfo() {
		return this.occurrenceInfo;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.mobicents.protocols.ss7.map.api.service.lsm.AreaEventInfo#getIntervalTime
	 * ()
	 */
	@Override
	public Integer getIntervalTime() {
		return this.intervalTime;
	}

	/* (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);
		
		int tag = ais.readTag();
		
		if (asnIS.getTagClass() != Tag.CLASS_CONTEXT_SPECIFIC || asnIS.isTagPrimitive() || tag != 0) {
			throw new MAPParsingComponentException(
					"Error while decoding AreaEventInfo: Parameter 0 [areaDefinition [0] AreaDefinition] bad tag class, tag or not primitive",
					MAPParsingComponentExceptionReason.MistypedParameter);
		}
		
		this.areaDefinition = new AreaDefinitionImpl();
		((AreaDefinitionImpl)this.areaDefinition).decodeAll(ais);
		
		while(true){
			if (ais.available() == 0)
				break;

			switch(ais.readTag()){
			case _TAG_OCCURRENCE_INFO:
				if (ais.getTagClass() != Tag.CLASS_CONTEXT_SPECIFIC || !ais.isTagPrimitive()) {
					throw new MAPParsingComponentException(
							"Error while decoding AreaEventInfo: Parameter 1 [occurrenceInfo [1] OccurrenceInfo] bad tag class, tag or not primitive",
							MAPParsingComponentExceptionReason.MistypedParameter);
				}
				
				int i1 = (int) ais.readInteger();
				
				this.occurrenceInfo = OccurrenceInfo.getOccurrenceInfo(i1);
				break;
			case _TAG_INTERVAL_TIME :
				if (ais.getTagClass() != Tag.CLASS_CONTEXT_SPECIFIC || !ais.isTagPrimitive()) {
					throw new MAPParsingComponentException(
							"Error while decoding AreaEventInfo: Parameter 2 [intervalTime [2] IntervalTime] bad tag class, tag or not primitive",
							MAPParsingComponentExceptionReason.MistypedParameter);
				}
				
				this.intervalTime = (int) ais.readInteger();
				break;
			default:
//				throw new MAPParsingComponentException(
//						"Error while decoding AreaEventInfo: Expected occurrenceInfo [1] OccurrenceInfo or intervalTime [2] IntervalTime, but found"
//								+ p.getTag(), MAPParsingComponentExceptionReason.MistypedParameter);
				ais.advanceElement();
				break;
			}
		}

	}

	/* (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.areaDefinition == null) {
			throw new MAPException("Error while encoding AreaEventInfo the mandatory parameter[areaDefinition [0] AreaDefinition] is not defined");
		}
		
		((AreaDefinitionImpl)this.areaDefinition).encodeAll(asnOs, Tag.CLASS_CONTEXT_SPECIFIC, 0);
		
		try{
			if(this.occurrenceInfo != null){
				asnOs.writeInteger(Tag.CLASS_CONTEXT_SPECIFIC, 1, this.occurrenceInfo.getInfo());
			}
			
			if(this.intervalTime != null){
				asnOs.writeInteger(Tag.CLASS_CONTEXT_SPECIFIC, 2, this.intervalTime);
			}
		
		} catch (IOException e) {
			throw new MAPException("IOException when encoding Area: " + e.getMessage(), e);
		} catch (AsnException e) {
			throw new MAPException("AsnException when encoding Area: " + e.getMessage(), e);
		}
	}
}