/*
 * TeleStax, Open Source Cloud Communications  Copyright 2012.
 * 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.sccp.impl.parameter;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import org.mobicents.protocols.ss7.sccp.SccpProtocolVersion;
import org.mobicents.protocols.ss7.sccp.message.ParseException;
import org.mobicents.protocols.ss7.sccp.parameter.ParameterFactory;
import org.mobicents.protocols.ss7.sccp.parameter.ReturnCause;
import org.mobicents.protocols.ss7.sccp.parameter.ReturnCauseValue;

/**
 *
 * @author baranowb
 * @author sergey vetyutnev
 */
public class ReturnCauseImpl extends AbstractParameter implements ReturnCause {

    private ReturnCauseValue value;
    private int digValue;

    public ReturnCauseImpl() {
        value = ReturnCauseValue.UNQALIFIED;
    }

    public ReturnCauseImpl(ReturnCauseValue value) {
        this.value = value;
        if (value != null)
            this.digValue = value.getValue();
    }

    public ReturnCauseImpl(int digValue) {
        this.digValue = digValue;
        value = ReturnCauseValue.getInstance(digValue);
    }

    public ReturnCauseValue getValue() {
        return value;
    }

    public int getDigitalValue() {
        return digValue;
    }

    @Override
    public void decode(final InputStream in, final ParameterFactory factory, final SccpProtocolVersion sccpProtocolVersion) throws ParseException {
        try {
            if (in.read() != 1) {
                throw new ParseException();
            }

            this.digValue = in.read() & 0xFF;
            this.value = ReturnCauseValue.getInstance(this.digValue);
        } catch (IOException e) {
            throw new ParseException(e);
        }
    }

    @Override
    public void encode(OutputStream out, final boolean removeSpc, final SccpProtocolVersion sccpProtocolVersion) throws ParseException {
        try {
            out.write(1);
            out.write(this.digValue);
        } catch (IOException e) {
            throw new ParseException(e);
        }
    }

    @Override
    public void decode(byte[] bb, final ParameterFactory factory, final SccpProtocolVersion sccpProtocolVersion) throws ParseException {
        this.digValue = bb[0] & 0xff;

        this.value = ReturnCauseValue.getInstance(this.digValue);
    }

    @Override
    public byte[] encode(final boolean removeSpc, final SccpProtocolVersion sccpProtocolVersion) throws ParseException {
        return new byte[] { (byte) this.digValue };
    }

    public String toString() {
        if (this.value != null)
            return this.value.toString();
        else {
            return ((Integer) this.digValue).toString();
        }
    }

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

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        ReturnCauseImpl other = (ReturnCauseImpl) obj;
        if (digValue != other.digValue)
            return false;
        return true;
    }
}