/*
 * 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.util.DisplayFormatters;
import org.gudy.azureus2.core3.util.Constants;

import org.gudy.azureus2.core3.peer.PEPeer;
import org.gudy.azureus2.plugins.ui.tables.*;
import org.gudy.azureus2.ui.swt.views.table.CoreTableColumnSWT;

/**
 *
 * @author TuxPaper
 * @author MjrTom Jan/14/2006 subtract discarded bytes
 */
public class UpDownRatioItem
       extends CoreTableColumnSWT 
       implements TableCellRefreshListener
{
  /** Default Constructor */
  public UpDownRatioItem(String table_id) {
    super("UpDownRatio", ALIGN_TRAIL, POSITION_INVISIBLE, 70, table_id);
    setRefreshInterval(INTERVAL_LIVE);
  }

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

  public void refresh(TableCell cell) {
    PEPeer peer = (PEPeer)cell.getDataSource();
    float value = 0;
    long lDivisor = 0;
    long lDivident = 0;
    if (peer != null) {
      lDivisor = peer.getStats().getTotalDataBytesReceived() -peer.getStats().getTotalBytesDiscarded();
      lDivident = peer.getStats().getTotalDataBytesSent();
      // skip if divisor is small (most likely handshake) or 0 (DivisionByZero)
      if (lDivisor > 1024) {
        value = lDivident / (float)lDivisor;
        if (value == 0)
          value = -1;
      } else if (lDivident > 0)
        value = Float.MAX_VALUE;
    }

    if (!cell.setSortValue((long)(value * 1000.0d )) && cell.isValid())
      return;

    String s;
    if (lDivisor <= 0) 
      s = "";
    else if (value == Float.MAX_VALUE )
      s = Constants.INFINITY_STRING + ":1";
    else if (value == -1)
      s = "1:" + Constants.INFINITY_STRING;
    else
      s = DisplayFormatters.formatDecimal(value, 2) + ":1";

    cell.setText(s);
  }
}
