/*
 * ProgressIndicatorDelay.java
 *
 * Copyright (C) 2022 by Posit Software, PBC
 *
 * Unless you have received this program directly from Posit Software pursuant
 * to the terms of a commercial license agreement with Posit Software, then
 * this program is licensed to you under the terms of version 3 of the
 * GNU Affero General Public License. This program is distributed WITHOUT
 * ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING THOSE OF NON-INFRINGEMENT,
 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Please refer to the
 * AGPL (http://www.gnu.org/licenses/agpl-3.0.txt) for more details.
 *
 */

package org.rstudio.core.client.widget;

import com.google.gwt.user.client.Timer;

public class ProgressIndicatorDelay implements ProgressIndicator
{
   private ProgressIndicator progressIndicator_;
   private int startDelay_;
   private boolean showing_ = false;
   private boolean firstUpdate_ = true;
   
   public ProgressIndicatorDelay(ProgressIndicator progressIndicator)
   {
      this(progressIndicator, 1000);
   }
   
   public ProgressIndicatorDelay(ProgressIndicator progressIndicator, int startDelay)
   {
      progressIndicator_ = progressIndicator;
      startDelay_ = startDelay;
   }
   
   @Override
   public void onProgress(final String status)
   {
      onProgress(status, new Operation()
      {
         @Override
         public void execute()
         {
         }
      });
   }
   
   @Override
   public void onProgress(final String status, final Operation onCancel)
   {
      showing_ = true;
      if (firstUpdate_)
      {
         firstUpdate_ = false;
         new Timer()
         {
            @Override
            public void run()
            {
               if (showing_)
               {
                  progressIndicator_.onProgress(status, onCancel);
               }
            }
         }.schedule(startDelay_);
      }
      else
      {
         progressIndicator_.onProgress(status, onCancel);
      }
   }
   
   @Override
   public void onCompleted()
   {
      reset();
      progressIndicator_.onCompleted();
   }

   @Override
   public void onError(String message)
   {
      reset();
      progressIndicator_.onError(message);
   }

   @Override
   public void clearProgress()
   {
      reset();
      progressIndicator_.clearProgress();
   }
   
   private void reset()
   {
      firstUpdate_ = true;
      showing_ = false;
   }
}
