// $HeadURL$
// $Id$
//
// Copyright © 2006, 2010, 2011, 2012 by the President and Fellows of Harvard College.
// 
// Screensaver is an open-source project developed by the ICCB-L and NSRB labs
// at Harvard Medical School. This software is distributed under the terms of
// the GNU General Public License.

package edu.harvard.med.lincs.screensaver.io.libraries.smallmolecule;

import java.net.URL;

import org.apache.log4j.Logger;

import edu.harvard.med.lincs.screensaver.LincsScreensaverConstants;
import edu.harvard.med.screensaver.io.libraries.smallmolecule.StructureImageLocator;
import edu.harvard.med.screensaver.model.libraries.SmallMoleculeReagent;
import edu.harvard.med.screensaver.util.UrlEncrypter;

public abstract class SmallMoleculeReagentFacilitySaltIdGenericImageLocator implements StructureImageLocator
{
  private static final String IMAGE_FILE_EXTENSION = ".png";

  private static Logger log = Logger.getLogger(SmallMoleculeReagentFacilitySaltIdGenericImageLocator.class);
  
  private String _baseUrl;
	private UrlEncrypter _urlEncrypter;
	
  public SmallMoleculeReagentFacilitySaltIdGenericImageLocator(String baseUrl)
  {
    _baseUrl = baseUrl;
  }
  
  public SmallMoleculeReagentFacilitySaltIdGenericImageLocator(String baseUrl, UrlEncrypter urlEncrypter)
  {
    _baseUrl = baseUrl;
    _urlEncrypter = urlEncrypter;
  }

  @Override
  public URL getImageUrl(SmallMoleculeReagent reagent)
  {
    try {
      if (reagent == null) {
        return null;
      }
      String name = reagent.getWell().getFacilityId() + LincsScreensaverConstants.FACILITY_ID_SEPARATOR + reagent.getSaltFormId();
      if (name.equals(LincsScreensaverConstants.FACILITY_ID_SEPARATOR)) {
        return null;
      }
      if(_urlEncrypter != null) {
      	// NOTE: do not encrypt the baseUrl, as this is required by the web.xml to identify the image locator servlet
    	name = _urlEncrypter.encryptUrl(name);
      }
      name = name + IMAGE_FILE_EXTENSION;
      URL url = new URL(_baseUrl + name);
      if (log.isDebugEnabled()) {
        log.debug("image URL for reagent " + reagent + ": " + url);
      }
      return url;
    }
    catch (Exception e) {
      log.error(e);
      return null;
    }
  }

}