/*
 * This program is free software; you can redistribute it and/or modify it under the
 * terms of the GNU General Public License, version 2 as published by the Free Software
 * Foundation.
 *
 * You should have received a copy of the GNU General Public License along with this
 * program; if not, you can obtain a copy at http://www.gnu.org/licenses/gpl-2.0.html
 * or from the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * 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.
 *
 *
 * Copyright 2006 - 2016 Pentaho Corporation.  All rights reserved.
 */

package org.pentaho.reporting.platform.plugin.async;

import org.pentaho.platform.api.engine.IPentahoSession;
import org.pentaho.reporting.engine.classic.core.event.ReportProgressEvent;
import org.pentaho.reporting.engine.classic.core.event.ReportProgressListener;

import java.util.UUID;

class AutoScheduleListener implements ReportProgressListener {

  private boolean scheduled = false;
  private int threshold;
  private UUID id;
  private IPentahoSession session;
  private IPentahoAsyncExecutor pentahoAsyncExecutor;

  protected AutoScheduleListener( final UUID id, final IPentahoSession session, final int threshold,
                                  final IPentahoAsyncExecutor pentahoAsyncExecutor ) {
    this.id = id;
    this.threshold = threshold;
    this.session = session;

    this.pentahoAsyncExecutor = pentahoAsyncExecutor;
  }

  private synchronized void autoSchedule( final ReportProgressEvent reportProgressEvent ) {
    if ( !scheduled && threshold > 0 && reportProgressEvent != null
      && reportProgressEvent.getMaximumRow() > threshold ) {
      //Auto scheduling always needs confirmation
      pentahoAsyncExecutor.preSchedule( id, session );
      scheduled = true;
    }
  }

  @Override public void reportProcessingStarted( final ReportProgressEvent reportProgressEvent ) {
    autoSchedule( reportProgressEvent );
  }

  @Override public void reportProcessingUpdate( final ReportProgressEvent reportProgressEvent ) {
    autoSchedule( reportProgressEvent );
  }

  @Override public void reportProcessingFinished( final ReportProgressEvent reportProgressEvent ) {

  }
}