/*
  http-image - Image extensions to jdk.httpserver
  Copyright (C) 2021  Ulrich Hilger

  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU Affero 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 Affero General Public License for more details.

  You should have received a copy of the GNU Affero General Public License
  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
package de.uhilger.httpserver.image;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * Eine Klasse zur Erzeugung verkleinerter sowie Base64-enkodierter Fassungen 
 * einer Bilddatei innerhalb eines Threads.
 * 
 * @author Ulrich Hilger
 * @version 1, 14.06.2021
 */
public class ImageThread extends Thread {

  private List<ThreadListener> listeners;
  private File dir;
  private File toFile;
  private String relName;
  private String indicator;
  private int size;
  private Datei datei;
  private String ext;

  public ImageThread(File dir, String relName, String indicator, int size, File toFile, Datei datei, String ext) {
    super();
    listeners = new ArrayList();
    this.dir = dir;
    this.relName = relName;
    this.indicator = indicator;
    this.size = size;
    this.toFile = toFile;
    this.datei = datei;
    this.ext = ext;
  }

  protected void sendFinished() {
    Iterator<ThreadListener> i = listeners.iterator();
    while (i.hasNext()) {
      ThreadListener listener = i.next();
      listener.finished();
    }
  }

  protected void clear() {
    sendFinished();
    listeners.clear();
    listeners = null;
  }

  /**
   * starten mit 
   * 
   * <pre>
   * Thread p = new ImageThread(..); 
   * p.start();
   * </pre>
   */
  @Override
  public void run() {
    try {
      ImageActor be = new ImageActor();
      be.createImage(dir, relName, indicator, size, toFile);
      be.setImgSrc(datei, ext, toFile);
      clear();
    } catch (IOException ex) {
      Logger.getLogger(ImageThread.class.getName()).log(Level.SEVERE, null, ex);
      clear();
    }
  }

  public void addListener(ThreadListener listener) {
    listeners.add(listener);
  }

  public void removeListener(ThreadListener listener) {
    listeners.remove(listener);
  }

  public interface ThreadListener {

    public void finished();
  }

}