/**
    * This file Copyright (c) 2003-2014 Magnolia International
    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
    *
    *
    * This file is dual-licensed under both the Magnolia
    * Network Agreement and the GNU General Public License.
    * You may elect to use one or the other of these licenses.
    *
   * This file is distributed in the hope that it will be
   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
   * implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
   * Redistribution, except as permitted by whichever of the GPL
   * or MNA you select, is prohibited.
   *
   * 1. For the GPL license (GPL), you can redistribute and/or
   * modify this file under the terms of the GNU General
   * Public License, Version 3, as published by the Free Software
   * Foundation.  You should have received a copy of the GNU
   * General Public License, Version 3 along with this program;
   * if not, write to the Free Software Foundation, Inc., 51
   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * 2. For the Magnolia Network Agreement (MNA), this file
   * and the accompanying materials are made available under the
   * terms of the MNA which accompanies this distribution, and
   * is available at http://www.magnolia-cms.com/mna.html
   *
   * Any modifications to this file must keep this entire header
   * intact.
   *
   */
  package info.magnolia.module.admininterface.pages;
  
  import info.magnolia.cms.core.NodeData;
  import info.magnolia.cms.core.HierarchyManager;
  import info.magnolia.context.MgnlContext;
  import info.magnolia.module.admininterface.PageMVCHandler;
  import info.magnolia.repository.RepositoryConstants;
  
  import java.awt.Graphics2D;
  import java.awt.Image;
  import java.awt.image.BufferedImage;
  import java.io.BufferedOutputStream;
  import java.io.IOException;
  import java.io.InputStream;
  
  import javax.imageio.ImageIO;
  import javax.servlet.ServletOutputStream;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.sun.image.codec.jpeg.JPEGCodec;
  import com.sun.image.codec.jpeg.JPEGEncodeParam;
  import com.sun.image.codec.jpeg.JPEGImageEncoder;
  
  
  /**
   * @author Fabrizio Giustina
   * @version $Id$
   */
  public class FileThumbnailDialogPage extends PageMVCHandler {
  
      /**
       * Stable serialVersionUID.
       */
      private static final long serialVersionUID = 222L;
  
      /**
       * Logger.
       */
      private static Logger log = LoggerFactory.getLogger(FileThumbnailDialogPage.class);
  
      private String src;
  
      private String size;
  
      /**
       * @param name
       * @param request
       * @param response
       */
      public FileThumbnailDialogPage(String name, HttpServletRequest request, HttpServletResponse response) {
          super(name, request, response);
      }
  
      /**
       * Setter for <code>size</code>.
       * @param size The size to set.
       */
      public void setSize(String size) {
          this.size = size;
      }
  
      /**
      * Setter for <code>src</code>.
      * @param src The src to set.
      */
     public void setSrc(String src) {
         this.src = src;
     }
 
     /**
      * @see info.magnolia.cms.servlets.MVCServletHandler#renderHtml(java.lang.String)
      */
     @Override
     public void renderHtml(String view) throws IOException {
 
         if (src == null) {
             return;
         }
 
         response.setContentType("image/jpeg"); //$NON-NLS-1$
 
         HierarchyManager hm = MgnlContext.getHierarchyManager(RepositoryConstants.WEBSITE);
 
         InputStream in = null;
 
         NodeData data;
         try {
             data = hm.getNodeData(src);
             in = data.getValue().getStream();
         }
         catch (Exception e) {
             log.error(e.getMessage(), e);
             return;
         }
 
         Image image = ImageIO.read(in);
 
         int thumbHeight;
         int thumbWidth;
         if (size != null) {
             thumbHeight = image.getHeight(null);
             thumbWidth = image.getWidth(null);
         }
         else {
             thumbWidth = 150;
             int w = image.getWidth(null);
             int h = image.getHeight(null);
             if (w == 0) {
                 w = 1;
             }
             if (h == 0) {
                 h = 1;
             }
 
             if (w > thumbWidth) {
                 thumbHeight = thumbWidth * h / w;
             }
             else {
                 thumbWidth = w;
                 thumbHeight = h;
             }
 
             if (thumbHeight > 120) {
                 thumbHeight = 100;
                 thumbWidth = thumbHeight * w / h;
             }
 
         }
 
         // draw original image to thumbnail image object and scale it to the new size on-the-fly
         BufferedImage thumbImage = new BufferedImage(thumbWidth, thumbHeight, BufferedImage.TYPE_INT_RGB);
         Graphics2D graphics2D = thumbImage.createGraphics();
         // graphics2D.setRenderingHint(RenderingHints.KEY_INTERPOLATION,RenderingHints.VALUE_INTERPOLATION_BILINEAR);
         graphics2D.drawImage(image, 0, 0, thumbWidth, thumbHeight, null);
 
         ServletOutputStream sout = response.getOutputStream();
         BufferedOutputStream output = new BufferedOutputStream(sout);
         JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(output);
         JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(thumbImage);
         param.setQuality(0.8f, false);
 
         encoder.setJPEGEncodeParam(param);
         encoder.encode(thumbImage);
     }
 
 }