EDIT

package eu.etaxonomy.cdm.model.media;

import java.net.URISyntaxException;

import java.util.ArrayList;

import java.util.Collection;

import java.util.Map;

import java.util.UUID;

import org.junit.Assert;

import org.junit.Before;

import org.junit.Test;

import eu.etaxonomy.cdm.common.URI;

public class MediaUtilsTest {

    private Media mediaImage1;

    private Media mediaImage2;

    private Media mediaImage3;

    private Media mediaImage4;

    private Media mediaAudio1;

    private MediaRepresentation smallJPGRepresentation;

    private MediaRepresentation bigJPGRepresentation;

    private MediaRepresentation unknownDimensionJPGRepresentation;

    private MediaRepresentation smallPNGRepresentation;

    private MediaRepresentation bigPNGRepresentation;

    private MediaRepresentation bigMP3Representation;

    @Before

    public void setUp() throws Exception {

        ImageFile smallJPG = ImageFile.NewInstance(new URI("http://foo.bar.net/small.JPG"), 200 * 100, 100, 200);

        smallJPGRepresentation = MediaRepresentation.NewInstance("image/jpg", "jpg");

        smallJPGRepresentation.addRepresentationPart(smallJPG);

        ImageFile bigJPG = ImageFile.NewInstance(new URI("http://foo.bar.net/big.JPG"), 2000 * 1000, 1000, 2000);

        bigJPGRepresentation = MediaRepresentation.NewInstance("image/jpg", "jpg");

        bigJPGRepresentation.addRepresentationPart(bigJPG);

        ImageFile unknownDimensionJPG = ImageFile.NewInstance(new URI("http://foo.bar.net/unknownDimension.JPG"), null, null, null);

        unknownDimensionJPGRepresentation = MediaRepresentation.NewInstance("image/jpg", "jpg");

        unknownDimensionJPGRepresentation.addRepresentationPart(unknownDimensionJPG);

        ImageFile smallPNG = ImageFile.NewInstance(new URI("http://foo.bar.net/small.PNG"), 200 * 100, 100, 200);

        smallPNGRepresentation = MediaRepresentation.NewInstance("image/png", "png");

        smallPNGRepresentation.addRepresentationPart(smallPNG);

        ImageFile bigPNG = ImageFile.NewInstance(new URI("http://foo.bar.net/big.PNG"), 2000 * 1000, 1000, 2000);

        bigPNGRepresentation = MediaRepresentation.NewInstance("image/png", "png");

        bigPNGRepresentation.addRepresentationPart(bigPNG);

        AudioFile bigMP3 = AudioFile.NewInstance(new URI("http://foo.bar.net/big.mp3"), 40000);

        bigMP3Representation = MediaRepresentation.NewInstance("audio/mpeg", "mp3");

        bigMP3Representation.addRepresentationPart(bigMP3);

        mediaImage1 = Media.NewInstance();

        mediaImage1.addRepresentation(smallJPGRepresentation);

        mediaImage1.addRepresentation(bigJPGRepresentation);

        mediaImage4 = Media.NewInstance();

        mediaImage4.addRepresentation(smallJPGRepresentation);

        mediaImage4.addRepresentation(bigJPGRepresentation);

        mediaImage4.addRepresentation(unknownDimensionJPGRepresentation);

        mediaImage2 = Media.NewInstance();

        mediaImage2.addRepresentation(smallPNGRepresentation);

        mediaImage3 = Media.NewInstance();

        mediaImage3.addRepresentation(bigPNGRepresentation);

        mediaAudio1 = Media.NewInstance();

        mediaAudio1.addRepresentation(bigMP3Representation);

    }

    private Media findMediaByUUID(Collection<Media> mediaList, UUID uuid){

        for(Media media : mediaList){

            if(media.getUuid().equals(uuid)){

                return media;

            }

        }

        return null;

    }

    @Test

    public void testFindPreferredMedia(){

        ArrayList<Media> imageList = new ArrayList<>();

        imageList.add(mediaImage1);

        imageList.add(mediaImage2);

        imageList.add(mediaImage3);

        Map<Media, MediaRepresentation> filteredList = MediaUtils.findPreferredMedia(

                imageList, ImageFile.class, null, null, null, null, MediaUtils.MissingValueStrategy.MAX);

        Assert.assertNotNull(findMediaByUUID(filteredList.keySet(), mediaImage1.getUuid()));

        Assert.assertNotNull(findMediaByUUID(filteredList.keySet(), mediaImage2.getUuid()));

        Assert.assertNotNull(findMediaByUUID(filteredList.keySet(), mediaImage3.getUuid()));

        ArrayList<Media> mixedMediaList =  new ArrayList<>();

        mixedMediaList.add(mediaImage1);

        mixedMediaList.add(mediaImage2);

        mixedMediaList.add(mediaImage3);

        mixedMediaList.add(mediaAudio1);

        filteredList = MediaUtils.findPreferredMedia(mixedMediaList, null, null, null, null, null, MediaUtils.MissingValueStrategy.MAX);

        Assert.assertNotNull(findMediaByUUID(filteredList.keySet(), mediaImage1.getUuid()));

        Assert.assertNotNull(findMediaByUUID(filteredList.keySet(), mediaImage2.getUuid()));

        Assert.assertNotNull(findMediaByUUID(filteredList.keySet(), mediaImage3.getUuid()));

        Assert.assertNotNull(findMediaByUUID(filteredList.keySet(), mediaAudio1.getUuid()));

        filteredList = MediaUtils.findPreferredMedia(mixedMediaList, AudioFile.class, null, null, null, null, MediaUtils.MissingValueStrategy.MAX);

        Assert.assertNotNull(findMediaByUUID(filteredList.keySet(), mediaAudio1.getUuid()));

        filteredList = MediaUtils.findPreferredMedia(mixedMediaList, ImageFile.class, null, null, null, null, MediaUtils.MissingValueStrategy.MAX);

        Assert.assertNotNull(findMediaByUUID(filteredList.keySet(), mediaImage1.getUuid()));

        Assert.assertNotNull(findMediaByUUID(filteredList.keySet(), mediaImage2.getUuid()));

        Assert.assertNotNull(findMediaByUUID(filteredList.keySet(), mediaImage3.getUuid()));

    }

    @Test

    public void testfindBestMatchingRepresentation() {

        // Logger.getLogger(MediaUtils.class).setLevel(Level.DEBUG);

        String[] mimetypes = {".*"};

        Assert.assertEquals(unknownDimensionJPGRepresentation.getParts().get(0).getUuid(),

                MediaUtils.findBestMatchingRepresentation(

                        mediaImage4, ImageFile.class, null, Integer.MAX_VALUE, Integer.MAX_VALUE, null, MediaUtils.MissingValueStrategy.MAX).getParts().get(0).getUuid()

                );

        Assert.assertEquals(

                bigJPGRepresentation.getUuid(),

                MediaUtils.findBestMatchingRepresentation(

                mediaImage1, null,  null, Integer.MAX_VALUE, Integer.MAX_VALUE, mimetypes, MediaUtils.MissingValueStrategy.MAX).getUuid()

                );

        Assert.assertEquals(smallJPGRepresentation.getUuid(),

                MediaUtils.findBestMatchingRepresentation(

                mediaImage1, null, null, 200, 300, mimetypes, MediaUtils.MissingValueStrategy.MAX).getUuid());

        Assert.assertEquals(bigJPGRepresentation.getUuid(),

                MediaUtils.findBestMatchingRepresentation(

                mediaImage1, null, null, 1500, 1500, mimetypes, MediaUtils.MissingValueStrategy.MAX).getUuid()

                );

        Assert.assertEquals(smallJPGRepresentation.getUuid(),

                MediaUtils.findBestMatchingRepresentation(

                mediaImage1, null, 300, null, null, mimetypes, MediaUtils.MissingValueStrategy.MAX).getUuid()

                );

        Assert.assertEquals(bigJPGRepresentation.getUuid(),

                MediaUtils.findBestMatchingRepresentation(

                mediaImage1, null, bigJPGRepresentation.getParts().get(0).getSize() - 100, null, null, mimetypes, MediaUtils.MissingValueStrategy.MAX).getUuid()

                );

        Assert.assertEquals(bigJPGRepresentation.getUuid(),

                MediaUtils.findBestMatchingRepresentation(

                mediaImage4, null, bigJPGRepresentation.getParts().get(0).getSize() + 2000, null, null, mimetypes, MediaUtils.MissingValueStrategy.MAX).getUuid()

                );

    }

    /**

     * where some images are loading slow, in these cases the algorithm chooses

     * the high quality representation even if the thumbnail size perfectly fits

     * the preferred size

     *

     * Thumbnails with 150x96 available (=> product is 14400) Preferred size

     * 120x120 defined in setting of taxon gallery (=> product is 14400)

     *

     */

    @Test

    public void testIssue7093() throws URISyntaxException {

        // ---------- PhoenixTheophrasti25.jpg

        ImageFile thumbnail = ImageFile.NewInstance(new URI("http://foo.bar.net/issue7093/thumbnail.JPG"), null, 150, 96);

        MediaRepresentation thumbnailRepresentation = MediaRepresentation.NewInstance("image/jpg", "jpg");

        thumbnailRepresentation.addRepresentationPart(thumbnail);

        ImageFile large = ImageFile.NewInstance(new URI("http://foo.bar.net/issue7093/big.JPG"), null, 670, 1122);

        MediaRepresentation largeRepresentation = MediaRepresentation.NewInstance("image/jpg", "jpg");

        largeRepresentation.addRepresentationPart(large);

        ImageFile middle = ImageFile.NewInstance(new URI("http://foo.bar.net/issue7093/middle.JPG"), null, 350,  586);

        MediaRepresentation middleRepresentation = MediaRepresentation.NewInstance("image/jpg", "jpg");

        middleRepresentation.addRepresentationPart(middle);

        Media media = Media.NewInstance();

        media.addRepresentation(largeRepresentation);

        media.addRepresentation(thumbnailRepresentation);

        String[] mimetypes = {".*"};

        Assert.assertEquals(thumbnailRepresentation, MediaUtils.findBestMatchingRepresentation(

                media, null,  null, 120, 120, mimetypes, MediaUtils.MissingValueStrategy.MAX));

        media.addRepresentation(middleRepresentation);

        Assert.assertEquals(thumbnailRepresentation, MediaUtils.findBestMatchingRepresentation(

                media, null,  null, 120, 120, mimetypes, MediaUtils.MissingValueStrategy.MAX));

        // ---- Phoenix_theophrasti_Turland_2009_0019.jpg, ...

        thumbnail = ImageFile.NewInstance(new URI("http://foo.bar.net/issue7093/thumbnail.JPG"), null, 150, 96);

        thumbnailRepresentation = MediaRepresentation.NewInstance("image/jpg", "jpg");

        thumbnailRepresentation.addRepresentationPart(thumbnail);

        large = ImageFile.NewInstance(new URI("http://foo.bar.net/issue7093/big.JPG"), null,  3787, 2535);

        largeRepresentation = MediaRepresentation.NewInstance("image/jpg", "jpg");

        largeRepresentation.addRepresentationPart(large);

        middle = ImageFile.NewInstance(new URI("http://foo.bar.net/issue7093/middle.JPG"), null, 523, 350);

        middleRepresentation = MediaRepresentation.NewInstance("image/jpg", "jpg");

        middleRepresentation.addRepresentationPart(middle);

        media = Media.NewInstance();

        media.addRepresentation(largeRepresentation);

        media.addRepresentation(thumbnailRepresentation);

        Assert.assertEquals(thumbnailRepresentation, MediaUtils.findBestMatchingRepresentation(

                media, null,  null, 120, 120, mimetypes, MediaUtils.MissingValueStrategy.MAX));

        media.addRepresentation(middleRepresentation);

        Assert.assertEquals(thumbnailRepresentation, MediaUtils.findBestMatchingRepresentation(

                media, null,  null, 120, 120, mimetypes, MediaUtils.MissingValueStrategy.MAX));

    }

}