/*******************************************************************************
 *     SDR Trunk 
 *     Copyright (C) 2014-2016 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 controller.channel;

import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlSeeAlso;
import javax.xml.bind.annotation.XmlTransient;

import module.decode.DecoderType;
import module.decode.config.AuxDecodeConfiguration;
import module.decode.config.DecodeConfigFactory;
import module.decode.config.DecodeConfiguration;
import module.log.EventLogType;
import module.log.config.EventLogConfiguration;

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

import record.RecorderType;
import record.config.RecordConfiguration;
import source.SourceType;
import source.config.SourceConfigFactory;
import source.config.SourceConfigRecording;
import source.config.SourceConfigTuner;
import source.config.SourceConfiguration;
import source.tuner.TunerChannel;
import source.tuner.TunerChannel.Type;

import source.tuner.frequency.FrequencyChangeEvent;
import source.tuner.frequency.FrequencyChangeEvent.Event;
import source.tuner.frequency.IFrequencyChangeProcessor;
import controller.config.Configuration;

@XmlSeeAlso( { Configuration.class } )
@XmlRootElement( name = "channel" )
public class Channel extends Configuration implements IFrequencyChangeProcessor
{
	private final static Logger mLog = LoggerFactory.getLogger( Channel.class );

	// Standard channels are persisted and traffic channels are temporary 
	public enum ChannelType { STANDARD, TRAFFIC };
	

	// Static unique channel identifier tracking
	private static int UNIQUE_ID = 0;

	private DecodeConfiguration mDecodeConfiguration = 
				DecodeConfigFactory.getDefaultDecodeConfiguration();
	private AuxDecodeConfiguration mAuxDecodeConfiguration =
				new AuxDecodeConfiguration();
	private SourceConfiguration mSourceConfiguration = 
				SourceConfigFactory.getDefaultSourceConfiguration();
	private EventLogConfiguration mEventLogConfiguration =
			    new EventLogConfiguration();
	private RecordConfiguration mRecordConfiguration = new RecordConfiguration();

	private String mAliasListName;
	private String mSystem = "System";
    private String mSite = "Site";
    private String mName = "Channel";
    
	private boolean mEnabled;
	private boolean mSelected;
	private TunerChannel mTunerChannel = null;
	
	private ChannelType mChannelType = ChannelType.STANDARD;

	private int mChannelID;
	private int mChannelFrequencyCorrection = 0;
	
	/**
	 * Channel represents a complete set of configurations needed to setup and
	 * manage a processing chain and/or manage as a set of business objects that
	 * can be displayed in graphical components.  
	 * 
	 * @param channelName
	 * @param channelType
	 */
	public Channel( String channelName, ChannelType channelType )
	{
		this( channelName );
		mChannelType = channelType;
	}

	/**
	 * Constructs a new standard channel with the specified channel name
	 */
	public Channel( String channelName )
	{
		this();
		mName = channelName;
	}

	/**
	 * Constructs a new standard channel with a default name of "Channel"
	 */
	public Channel()
	{
		mChannelID = UNIQUE_ID++;
	}

	/**
	 * Creates a (new) deep copy of this channel
	 */
	public Channel copyOf()
	{
		Channel channel = new Channel( mName );
		channel.setSystem( mSystem );
		channel.setSite( mSite );
		channel.setAliasListName( mAliasListName );

		AuxDecodeConfiguration aux = new AuxDecodeConfiguration();
		
		for( DecoderType auxType: aux.getAuxDecoders() )
		{
			aux.addAuxDecoder( auxType );
		}
		
		channel.setAuxDecodeConfiguration( aux );
		
		channel.setDecodeConfiguration( DecodeConfigFactory.copy( mDecodeConfiguration ) );
		
		EventLogConfiguration log = new EventLogConfiguration();
		
		for( EventLogType logType: mEventLogConfiguration.getLoggers() )
		{
			log.addLogger( logType );
		}
		
		channel.setEventLogConfiguration( log );

		RecordConfiguration record = new RecordConfiguration();
		
		for( RecorderType recordType: mRecordConfiguration.getRecorders() )
		{
			record.addRecorder( recordType );
		}
		
		channel.setRecordConfiguration( record );

		channel.setSourceConfiguration( SourceConfigFactory.copy( mSourceConfiguration ) );
		
		return channel;
	}
	
	/**
	 * Unique identifier for this channel.  Value is transient (not persisted).
	 */
	@XmlTransient
	public int getChannelID()
	{
		return mChannelID;
	}
	
	/**
	 * Indicates if this channel has been selected for prioritized audio output
	 * and display of processing chain products
	 */
	@XmlTransient
	public boolean isSelected()
	{
		return mSelected;
	}
	
	public void setSelected( boolean selected )
	{
		mSelected = selected;
	}
	
	@XmlTransient
	public ChannelType getChannelType()
	{
		return mChannelType;
	}
	
    /**
     * Returns the owning system for this channel.
     */
	@XmlAttribute( name = "system" )
	public String getSystem()
	{
	    return mSystem;
	}
	
	public void setSystem( String system )
	{
		mSystem = system;
	}

	public boolean hasSystem()
	{
		return mSystem != null;
	}
	
	/**
	 * Returns the owning site for this channel.
	 */
	@XmlAttribute( name = "site" )
	public String getSite()
	{
		return mSite;
	}
	
	public void setSite( String site )
	{
		mSite = site;
	}
	
	public boolean hasSite()
	{
		return mSite != null;
	}
	
	/**
	 * Returns the name of this channel.
	 */
	@XmlAttribute( name = "name" )
	public String getName()
	{
		return mName;
	}
	
	/**
	 * Sets the name of this channel.
	 */
	public void setName( String name )
	{
		mName = name;
	}

    /**
     * Default display string for this channel: SYSTEM_SITE_NAME
     */
	public String toString()
	{
		StringBuilder sb = new StringBuilder();
		sb.append( hasSystem() ? getSystem() : "SYSTEM" );
		sb.append( "_" );
		sb.append( hasSite() ? getSite() : "SITE" );
		sb.append( "_" );
		sb.append( getName() );
		
		return sb.toString();
	}

	/**
	 * Indicates if this channel is enabled for processing.  
	 */
	@XmlAttribute( name = "enabled" )
	public boolean getEnabled()
	{
		return mEnabled;
	}

	/**
	 * Indicates if this channel will automatically start processing on 
	 * application startup or if this channel is currently processing after 
	 * application startup.
	 * 
	 * Note: this method is package private and is intended to be managed
	 * by a co-package central processing manager
	 * 
	 * @see controller.ChannelProcessingManager
	 */
	void setEnabled( boolean enabled )
	{
		mEnabled = enabled;
	}

	/**
	 * Returns the alias list that is used by this channel for looking up alias
	 * values for the various identifiers produced by the decoder(s).
	 */
	@XmlElement( name = "alias_list_name" )
	public String getAliasListName()
	{
		return mAliasListName;
	}

	/**
	 * Sets the alias list to be used for looking up the alias values for the 
	 * various identifiers produced by the decoder
	 */
	public void setAliasListName( String name )
	{
		mAliasListName = name;
	}

	/**
	 * Gets the primary decoder configuration used by this channel
	 */
	@XmlElement( name = "decode_configuration" )
	public DecodeConfiguration getDecodeConfiguration()
	{
		return mDecodeConfiguration;
	}

	/**
	 * Sets the primary decoder configuration used by this channel
	 */
	public void setDecodeConfiguration( DecodeConfiguration config )
	{
		mDecodeConfiguration = config;
	}

	/**
	 * Gets the aux decoder configuration used by this channel.  Aux decoders
	 * operate on demodulated audio
	 */
	@XmlElement( name = "aux_decode_configuration" )
	public AuxDecodeConfiguration getAuxDecodeConfiguration()
	{
		return mAuxDecodeConfiguration;
	}

	/**
	 * Sets the decoder configuration used by this channel
	 */
	public void setAuxDecodeConfiguration( AuxDecodeConfiguration config )
	{
		mAuxDecodeConfiguration = config;
	}

	/**
	 * Returns the source configuration for this channel.  A channel source 
	 * identifies where the processing chain will get source sample data from.
	 */
	@XmlElement( name = "source_configuration" )
	public SourceConfiguration getSourceConfiguration()
	{
		return mSourceConfiguration;
	}

	/**
	 * Sets the source configuration for this channel.
	 */
	public void setSourceConfiguration( SourceConfiguration config )
	{
		mSourceConfiguration = config;

		//Clear the tune channel object so that it can be recreated if the 
		//source configuration changes
		mTunerChannel = null;
	}

	/**
	 * Returns the event logger configuration for this channel.
	 */
	@XmlElement( name = "event_log_configuration" )
	public EventLogConfiguration getEventLogConfiguration()
	{
		return mEventLogConfiguration;
	}

	/**
	 * Sets the event logger configuration for this channel.
	 */
	public void setEventLogConfiguration( EventLogConfiguration config )
	{
		mEventLogConfiguration = config;
	}

	/**
	 * Returns the recorder configuration for this channel.
	 */
	@XmlElement( name = "record_configuration" )
	public RecordConfiguration getRecordConfiguration()
	{
		return mRecordConfiguration;
	}

	/**
	 * Sets the recorder configuration for this channel.
	 */
	public void setRecordConfiguration( RecordConfiguration config )
	{
		mRecordConfiguration = config;
	}

	/**
	 * Convenience method to construct a tuner channel object representing a
	 * tuner or recording source frequency and bandwidth that can be used by
	 * application components for graphically representing this channel.
	 * 
	 * If the source configuration is not a tuner or recording, this method 
	 * returns null.
	 */
	@XmlTransient
    public TunerChannel getTunerChannel()
    {
		if( mTunerChannel == null )
		{
	        if( mSourceConfiguration.getSourceType() == SourceType.TUNER )
	        {
	            SourceConfigTuner config = (SourceConfigTuner)mSourceConfiguration;

	            mTunerChannel = new TunerChannel( Type.LOCKED, config.getFrequency(), 
	                    mDecodeConfiguration.getDecoderType().getChannelBandwidth() );
	        }
	        else if( mSourceConfiguration.getSourceType() == SourceType.RECORDING )
	        {
	            SourceConfigRecording config = 
	            		(SourceConfigRecording)mSourceConfiguration;

	            mTunerChannel = new TunerChannel( Type.LOCKED, config.getFrequency(), 
	                mDecodeConfiguration.getDecoderType().getChannelBandwidth() );
	        }
		}
        
        return mTunerChannel;
    }

	/**
	 * Convenience method to indicate if any part of this channel is contained 
	 * within the minimum and maximum frequency values.
	 */
	public boolean isWithin( long minimum, long maximum )
	{
		TunerChannel tunerChannel = getTunerChannel();
		
		return tunerChannel != null &&
			   tunerChannel.overlaps( minimum, maximum );
	}
	
	/**
	 * Convenience method to make the current channel frequency correction value
	 * available for use outside of a constructed processing chain while maintaining
	 * linkage to the source channel.  This hack allows the correction value to
	 * be used to visually show in the spectral display.
	 */
	@Override
	public void frequencyChanged( FrequencyChangeEvent event )
	{
		if( event.getEvent() == Event.NOTIFICATION_CHANNEL_FREQUENCY_CORRECTION_CHANGE )
		{
			mChannelFrequencyCorrection = event.getValue().intValue();
		}
	}

	@XmlTransient
	public int getChannelFrequencyCorrection()
	{
		return mChannelFrequencyCorrection;
	}
}