EDIT

// $Id$

/**

* Copyright (C) 2007 EDIT

* European Distributed Institute of Taxonomy 

* http://www.e-taxonomy.eu

* 

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.cdm.api.utility;

import java.util.ArrayList;

import java.util.Collections;

import java.util.HashSet;

import java.util.List;

import java.util.Set;

import org.apache.log4j.Logger;

import eu.etaxonomy.cdm.model.description.DescriptionBase;

import eu.etaxonomy.cdm.model.description.DescriptionElementBase;

import eu.etaxonomy.cdm.model.description.Feature;

import eu.etaxonomy.cdm.model.description.TaxonDescription;

import eu.etaxonomy.cdm.model.description.TextData;

import eu.etaxonomy.cdm.model.media.ImageFile;

import eu.etaxonomy.cdm.model.media.Media;

import eu.etaxonomy.cdm.model.media.MediaRepresentation;

import eu.etaxonomy.cdm.model.media.MediaRepresentationPart;

import eu.etaxonomy.cdm.model.taxon.Taxon;

/**

 * @author n.hoffmann

 * @created Jan 27, 2010

 * @version 1.0

 */

public class ImagesUtility {

	private static final Logger logger = Logger.getLogger(ImagesUtility.class);

	/**

	 * Quick and dirty method to get an element's first image file.

	 * 

	 * @param element

	 * @return

	 * @deprecated not used by EDITor anymore

	 */

	@Deprecated

	public static ImageFile getImage(DescriptionElementBase element) {

		List<Media> medias = element.getMedia();

		for(Media media : medias){

			Set<MediaRepresentation> representations = media.getRepresentations();

			for(MediaRepresentation representation : representations){

				List<MediaRepresentationPart> parts = representation.getParts();

				for (MediaRepresentationPart part : parts){

					if(part instanceof ImageFile){

						return (ImageFile) part;

					}

				}

			}							

		}

		return null;

	}

	/**

	 * @deprecated not used by EDITor anymore

	 */

	@Deprecated

	public static List<ImageFile> getOrderedImages(DescriptionElementBase element){

		List<ImageFile> imageList = new ArrayList<ImageFile>();

		MediaRepresentation representation = getImageMediaRepresentation(element);

		if (representation != null) {

			for (MediaRepresentationPart part : representation.getParts()){

				if(!(part instanceof ImageFile)){

					throw new RuntimeException("Your database contains media that mix Image Files with non-Image Files.");

				} else {

					imageList.add((ImageFile) part);

				}

			}

		}

		return imageList;

	}

	/**

	 * Returns the first Representation with images. If none is found, a

	 * Representation for storing images is created and returned.

	 * 

	 * @deprecated not used by EDITor anymore

	 * @param element

	 * @return

	 */

	@Deprecated

	private static MediaRepresentation getImageMediaRepresentation(DescriptionElementBase element) {

		// Drill down until a representation with images is found

		for(Media media : element.getMedia()){

			Set<MediaRepresentation> representations = media.getRepresentations();

			for(MediaRepresentation representation : representations){

				List<MediaRepresentationPart> parts = representation.getParts();

				for (MediaRepresentationPart part : parts){

					if(part instanceof ImageFile){

						return representation;

					}

				}

			}							

		}		

		// No representation with images found - create

		MediaRepresentation representation = MediaRepresentation.NewInstance();

		Media media = Media.NewInstance();

		element.addMedia(media);

		media.addRepresentation(representation);

		return representation;

	}

	/**

	 * @deprecated not used by EDITor anymore

	 * @param description

	 * @return

	 */

	@Deprecated

	public static Set<ImageFile> getImages(TaxonDescription description){

		Set<ImageFile> images = new HashSet<ImageFile>();

		for (DescriptionElementBase element : description.getElements()){

			Feature feature = element.getFeature();

			if(feature.equals(Feature.IMAGE())){

				List<Media> medias = element.getMedia();

				for(Media media : medias){

					Set<MediaRepresentation> representations = media.getRepresentations();

					for(MediaRepresentation representation : representations){

						List<MediaRepresentationPart> parts = representation.getParts();

						for (MediaRepresentationPart part : parts){

							if(part instanceof ImageFile){

								images.add((ImageFile) part);

							}

						}

					}							

				}										

			}

		}

		return images;

	}

	/**

	 * @deprecated not used by EDITor anymore

	 * @param taxon

	 * @param imageFile

	 */

	@Deprecated

	public static void addTaxonImage(Taxon taxon, DescriptionBase<?> imageGallery, ImageFile imageFile) {

		imageGallery.addElement(createImageElement(imageFile));

	}

	/**

	 * @deprecated not used by EDITor anymore

	 * @param imageFile

	 * @return

	 */

	@Deprecated

	public static DescriptionElementBase createImageElement(ImageFile imageFile) {

		DescriptionElementBase descriptionElement = TextData.NewInstance(Feature.IMAGE());

		Media media = Media.NewInstance();

		MediaRepresentation representation = MediaRepresentation.NewInstance();

		representation.addRepresentationPart(imageFile);

		media.addRepresentation(representation);

		descriptionElement.addMedia(media);

		return descriptionElement;

	}

	/**

	 * Adds a new, empty image file to the end of a description element's

	 * ordered list of images.

	 * 

	 * @deprecated not used by EDITor anymore

	 * @param element

	 * @return 

	 */

	@Deprecated

	public static ImageFile addImagePart(DescriptionElementBase element) {

		ImageFile imageFile = ImageFile.NewInstance(null, null);

		getImageMediaRepresentation(element).addRepresentationPart(imageFile);

		return imageFile;

	}

	/**

	 * @deprecated not used by EDITor anymore

	 * @param taxon

	 * @param imageFile

	 */

	@Deprecated

	public static void removeTaxonImage(Taxon taxon, DescriptionBase<?> imageGallery, ImageFile imageFile) {

		Set<DescriptionElementBase> descriptionElementsToRemove = new HashSet<DescriptionElementBase>();

		Set<MediaRepresentationPart> representationPartsToRemove = new HashSet<MediaRepresentationPart>();

		Set<DescriptionElementBase> images = imageGallery.getElements();

		// overmodelling of media in cdmlib makes this a little bit complicated

		for(DescriptionElementBase descriptionElement : images){

			for(Media media : descriptionElement.getMedia()){

				for(MediaRepresentation representation : media.getRepresentations()){

					for(MediaRepresentationPart part : representation.getParts()){

						if(part.equals(imageFile)){

							// because of concurrent modification, we just collect the parts to remove 

							representationPartsToRemove.add(part);

						}

					}

					// and then remove the representation parts here

					for (MediaRepresentationPart part : representationPartsToRemove){

						representation.removeRepresentationPart(part);

					}

					// clear set for next run

					representationPartsToRemove.clear();

					// description elements with empty representations should be deleted as well

					if(representation.getParts().size() == 0){

						descriptionElementsToRemove.add(descriptionElement);

					}

				}

			}

		}	

		// remove the empty description elements

		for(DescriptionElementBase descriptionElement : descriptionElementsToRemove){

			imageGallery.removeElement(descriptionElement);

		}		

	}

	public static final int UP = 1;

	public static final int DOWN = -1;

	/**

	 * @deprecated not used by EDITor anymore

	 * @param input

	 * @param selectedImage

	 * @param direction

	 */

	@Deprecated

	public static void moveImage(DescriptionElementBase element, ImageFile image,

			int direction) {

		MediaRepresentation representation = getImageMediaRepresentation(element);

		int index = representation.getParts().indexOf(image);

		if (index == -1) {

			return;

		}		

		if (direction == UP && index != 0) {

			Collections.swap(representation.getParts(), index, index - 1);

		}

		if (direction == DOWN && index < representation.getParts().size() - 1) {

			Collections.swap(representation.getParts(), index, index + 1);

		}

	}

	/**

	 * @deprecated not used by EDITor anymore

	 * @param input

	 * @param selectedImage

	 */

	@Deprecated

	public static void removeImage(DescriptionElementBase element, ImageFile image) {

		getImageMediaRepresentation(element).getParts().remove(image);

	}

	/**

	 * Iterate through all taxon's image galleries until the descriptive element containing

	 * the ImageFile is found.

	 * 

	 * @deprecated not used by EDITor anymore

	 * @param image

	 * @param taxon 

	 * @return 

	 */

	@Deprecated

	public static DescriptionElementBase findImageElement(ImageFile image, Taxon taxon) {

		if (taxon == null) {

			return null;

		}

		for (TaxonDescription description : taxon.getDescriptions()) {

			if (description.isImageGallery()) {

				for (DescriptionElementBase element : description.getElements()) {

					if (getOrderedImages(element).contains(image)) {

						return element;

					}

				}

			}

		}

		return null;		

	}

	/**

	 * 

	 * @param description

	 * @param media

	 */

	public static void addMediaToGallery(DescriptionBase description, Media media){

		DescriptionElementBase element = getGalleryElement(description);

		element.addMedia(media);

	}

	/**

	 * 

	 * @param description

	 * @param media

	 */

	public static void removeMediaFromGallery(DescriptionBase description, Media media){

		DescriptionElementBase element = getGalleryElement(description);

		element.removeMedia(media);

	}

	/**

	 * 

	 * 

	 * @param description

	 * @return

	 */

	private static DescriptionElementBase getGalleryElement(DescriptionBase description){

		if(! description.isImageGallery()){

			logger.error("Description has to have imageGallery flag set.");

		}

		Set<DescriptionElementBase> elements = description.getElements();

		if(elements.size() != 1){

			logger.error("Image gallery should have only one description");

		}

		return elements.iterator().next();

	}

}