package decode.p25.message.tdu.lc;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import decode.p25.message.IdentifierProvider;
import decode.p25.message.IdentifierReceiver;
import decode.p25.message.P25Message.DuplexMode;
import decode.p25.message.P25Message.SessionMode;
import decode.p25.reference.LinkControlOpcode;

public class GroupVoiceChannelUpdateExplicit extends TDULinkControlMessage
									 implements IdentifierReceiver
{
	private final static Logger mLog = 
			LoggerFactory.getLogger( GroupVoiceChannelUpdateExplicit.class );

    public static final int EMERGENCY_FLAG = 92;
    public static final int ENCRYPTED_CHANNEL_FLAG = 93;
    public static final int DUPLEX_MODE = 94;
    public static final int SESSION_MODE = 95;
	public static final int[] GROUP_ADDRESS = { 112,113,114,115,116,117,118,
		119,120,121,122,123,136,137,138,139 };
	public static final int[] TRANSMIT_IDENTIFIER = { 140,141,142,143 };
	public static final int[] TRANSMIT_CHANNEL = { 144,145,146,147,160,161,162,
		163,164,165,166,167 };
	public static final int[] RECEIVE_IDENTIFIER = { 168,169,170,171 };
	public static final int[] RECEIVE_CHANNEL = { 184,185,186,187,188,189,190,
		191,192,193,194,195,196,197,198,199 };
	
	private IdentifierProvider mTransmitIdentifierUpdate;
	private IdentifierProvider mReceiveIdentifierUpdate;
	
	public GroupVoiceChannelUpdateExplicit( TDULinkControlMessage source )
	{
		super( source );
	}
	
    @Override
    public String getEventType()
    {
        return LinkControlOpcode.GROUP_VOICE_CHANNEL_UPDATE_EXPLICIT.getDescription();
    }

	@Override
	public String getMessage()
	{
		StringBuilder sb = new StringBuilder();
		
		sb.append( getMessageStub() );
		
		if( isEmergency() )
		{
			sb.append( " EMERGENCY" );
		}
		if( isEncryptedChannel() )
		{
			sb.append( " ENCRYPTED CHANNEL" );
		}

		
		return sb.toString();
	}

    public boolean isEmergency()
    {
        return mMessage.get( EMERGENCY_FLAG );
    }
    
    public boolean isEncryptedChannel()
    {
        return mMessage.get( ENCRYPTED_CHANNEL_FLAG );
    }
    
    public DuplexMode getDuplexMode()
    {
        return mMessage.get( DUPLEX_MODE ) ? DuplexMode.FULL : DuplexMode.HALF;
    }

    public SessionMode getSessionMode()
    {
        return mMessage.get( SESSION_MODE ) ? 
                SessionMode.CIRCUIT : SessionMode.PACKET;
    }

    public int getTransmitChannelIdentifier()
	{
		return mMessage.getInt( TRANSMIT_IDENTIFIER );
	}
	
    public int getTransmitChannelNumber()
    {
    	return mMessage.getInt( TRANSMIT_CHANNEL );
    }
    
    public String getTransmitChannel()
    {
    	return getTransmitChannelIdentifier() + "-" + getTransmitChannelNumber();
    }
    
    public int getReceiveChannelIdentifier()
	{
		return mMessage.getInt( RECEIVE_IDENTIFIER );
	}
	
    public int getReceiveChannelNumber()
    {
    	return mMessage.getInt( RECEIVE_CHANNEL );
    }
    
    public String getReceiveChannel()
    {
    	return getReceiveChannelIdentifier() + "-" + getReceiveChannelNumber();
    }
    
    public String getGroupAddress()
    {
    	return mMessage.getHex( GROUP_ADDRESS, 4 );
    }
    
	@Override
    public void setIdentifierMessage( int identifier, IdentifierProvider message )
    {
		if( identifier == getTransmitChannelIdentifier() )
		{
			mTransmitIdentifierUpdate = message;
		}
		if( identifier == getReceiveChannelIdentifier() )
		{
			mReceiveIdentifierUpdate = message;
		}
    }

	@Override
    public int[] getIdentifiers()
    {
		int[] identifiers = new int[ 2 ];
		
		identifiers[ 0 ] = getTransmitChannelIdentifier();
		identifiers[ 1 ] = getReceiveChannelIdentifier();
		
		return identifiers;
    }

    public long getDownlinkFrequency()
    {
    	return calculateDownlink( mTransmitIdentifierUpdate, 
    			getTransmitChannelNumber() );
    }
    
    public long getUplinkFrequency()
    {
    	return calculateUplink( mReceiveIdentifierUpdate, 
    			getReceiveChannelNumber() );
    }
}