/*
 * Copyright (C) Azureus Software, Inc, All Rights Reserved.
 *
 * 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 2 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 ( see the LICENSE file ).
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
 
package org.gudy.azureus2.ui.swt.views.tableitems.peers;

import org.gudy.azureus2.core3.peer.PEPeer;
import org.gudy.azureus2.core3.util.DisplayFormatters;

import org.gudy.azureus2.plugins.ui.tables.TableCell;
import org.gudy.azureus2.plugins.ui.tables.TableCellRefreshListener;
import org.gudy.azureus2.plugins.ui.tables.TableColumnInfo;
import org.gudy.azureus2.ui.swt.views.table.CoreTableColumnSWT;

/** Downloaded from others WHILE connected to you
 *
 * @author TuxPaper
 * @since 2.1.0.1
 */
public class DLedFromOthersItem
       extends CoreTableColumnSWT 
       implements TableCellRefreshListener
{ 
	public static final String COLUMN_ID = "DLedFromOthers";

	public void fillTableColumnInfo(TableColumnInfo info) {
		info.addCategories(new String[] {
			CAT_BYTES,
		});
	}

  /** Default Constructor */
  public DLedFromOthersItem(String table_id) {
    super(COLUMN_ID, ALIGN_TRAIL, POSITION_INVISIBLE, 70, table_id);
    setRefreshInterval(INTERVAL_LIVE);
  }

  public void refresh(TableCell cell) {
    PEPeer peer = (PEPeer)cell.getDataSource();
    long value = (peer == null) ? 0 : peer.getStats().getTotalBytesDownloadedByPeer() - peer.getStats().getTotalDataBytesSent();
    // Just because we sent data doesn't mean the peer has told us the piece is done yet
    if (value < 0) value = 0;
    
    if ( peer != null ){
	    Long prev_value = (Long)peer.getData( "DLedFromOther_prev" );
	    
	    if( prev_value != null ) {
	      if( value < prev_value.longValue() ) {  //dont show decrement while we're actively uploading
	        value = prev_value.longValue();
	      }
	      else if( value > prev_value.longValue() ) {
	        peer.setData( "DLedFromOther_prev", new Long( value ) );
	      }
	    }
	    else {
	      peer.setData( "DLedFromOther_prev", new Long( value ) );
	    }
    }
    
    if (!cell.setSortValue(value) && cell.isValid())
      return;

    cell.setText(DisplayFormatters.formatByteCountToKiBEtc(value));
  }
}
