/*******************************************************************************
 * sdrtrunk
 * Copyright (C) 2014-2017 Dennis Sheirer
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 *
 ******************************************************************************/
package module.decode.p25.message.tsbk.osp.control;

import module.decode.p25.message.IBandIdentifier;
import module.decode.p25.message.tsbk.TSBKMessage;
import module.decode.p25.reference.DataUnitID;
import alias.AliasList;
import bits.BinaryMessage;

public abstract class IdentifierUpdate extends TSBKMessage implements IBandIdentifier
{
    public static final int[] IDENTIFIER = { 80,81,82,83 };

    public static final int[] CHANNEL_SPACING = { 102,103,104,105,106,107,108,
    	109,110,111 };
    
    public static final int[] BASE_FREQUENCY = { 112,113,114,115,116,117,118,
        119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,
        137,138,139,140,141,142,143 };
    
    public IdentifierUpdate( BinaryMessage message, 
                             DataUnitID duid,
                             AliasList aliasList ) 
    {
        super( message, duid, aliasList );
    }
    
    @Override
    public int getIdentifier()
    {
        return mMessage.getInt( IDENTIFIER );
    }
    
    @Override
    public long getChannelSpacing()
    {
    	return mMessage.getLong( CHANNEL_SPACING ) * 125l;
    }

    @Override
    public long getBaseFrequency()
    {
        return mMessage.getLong( BASE_FREQUENCY ) * 5l;
    }
    
    @Override
    public abstract long getTransmitOffset();

    @Override
    public long getDownlinkFrequency(int channelNumber)
    {
        return getBaseFrequency() + ( channelNumber * getChannelSpacing() );
    }

    @Override
    public long getUplinkFrequency(int channelNumber)
    {
        return getDownlinkFrequency(channelNumber) + getTransmitOffset();
    }

    @Override
    public boolean isTDMA()
    {
        return false;
    }
}