package org.jaudiotagger.tag.id3;

import static org.jaudiotagger.tag.id3.ID3v24Frames.*;

import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;

/**
 * Orders frame Ids so that the most important frames are writtne first
 */
public class ID3v24PreferredFrameOrderComparator implements Comparator<String>
{
    private static ID3v24PreferredFrameOrderComparator comparator;
    private static List frameIdsInPreferredOrder = new ArrayList<String>();

    static
    {
        //these are the key ones we want at the top
        frameIdsInPreferredOrder.add(FRAME_ID_UNIQUE_FILE_ID);
        frameIdsInPreferredOrder.add(FRAME_ID_TITLE);
        frameIdsInPreferredOrder.add(FRAME_ID_ARTIST);
        frameIdsInPreferredOrder.add(FRAME_ID_ALBUM);
        frameIdsInPreferredOrder.add(FRAME_ID_ALBUM_SORT_ORDER);
        frameIdsInPreferredOrder.add(FRAME_ID_GENRE);
        frameIdsInPreferredOrder.add(FRAME_ID_COMPOSER);
        frameIdsInPreferredOrder.add(FRAME_ID_CONDUCTOR);
        frameIdsInPreferredOrder.add(FRAME_ID_CONTENT_GROUP_DESC);
        frameIdsInPreferredOrder.add(FRAME_ID_TRACK);
        frameIdsInPreferredOrder.add(FRAME_ID_YEAR);
        frameIdsInPreferredOrder.add(FRAME_ID_ACCOMPANIMENT);
        frameIdsInPreferredOrder.add(FRAME_ID_BPM);
        frameIdsInPreferredOrder.add(FRAME_ID_ISRC);
        frameIdsInPreferredOrder.add(FRAME_ID_TITLE_SORT_ORDER);
        frameIdsInPreferredOrder.add(FRAME_ID_TITLE_REFINEMENT);
        frameIdsInPreferredOrder.add(FRAME_ID_UNSYNC_LYRICS);
        frameIdsInPreferredOrder.add(FRAME_ID_USER_DEFINED_INFO);
        frameIdsInPreferredOrder.add(FRAME_ID_USER_DEFINED_URL);
        frameIdsInPreferredOrder.add(FRAME_ID_URL_ARTIST_WEB);
        frameIdsInPreferredOrder.add(FRAME_ID_URL_COMMERCIAL);
        frameIdsInPreferredOrder.add(FRAME_ID_URL_COPYRIGHT);
        frameIdsInPreferredOrder.add(FRAME_ID_URL_FILE_WEB);
        frameIdsInPreferredOrder.add(FRAME_ID_URL_OFFICIAL_RADIO);
        frameIdsInPreferredOrder.add(FRAME_ID_URL_PAYMENT);
        frameIdsInPreferredOrder.add(FRAME_ID_URL_PUBLISHERS);
        frameIdsInPreferredOrder.add(FRAME_ID_URL_COMMERCIAL);
        frameIdsInPreferredOrder.add(FRAME_ID_LYRICIST);
        frameIdsInPreferredOrder.add(FRAME_ID_MEDIA_TYPE);
        frameIdsInPreferredOrder.add(FRAME_ID_INVOLVED_PEOPLE);
        frameIdsInPreferredOrder.add(FRAME_ID_LANGUAGE);
        frameIdsInPreferredOrder.add(FRAME_ID_ARTIST_SORT_ORDER);
        frameIdsInPreferredOrder.add(FRAME_ID_PLAYLIST_DELAY);
        frameIdsInPreferredOrder.add(FRAME_ID_PLAY_COUNTER);
        frameIdsInPreferredOrder.add(FRAME_ID_POPULARIMETER);
        frameIdsInPreferredOrder.add(FRAME_ID_PUBLISHER);
        frameIdsInPreferredOrder.add(FRAME_ID_ALBUM_ARTIST_SORT_ORDER_ITUNES);
        frameIdsInPreferredOrder.add(FRAME_ID_COMPOSER_SORT_ORDER_ITUNES);
        frameIdsInPreferredOrder.add(FRAME_ID_IS_COMPILATION);
        frameIdsInPreferredOrder.add(FRAME_ID_COMMENT);
        
        //Not so bothered about these
        frameIdsInPreferredOrder.add(FRAME_ID_AUDIO_SEEK_POINT_INDEX);
        frameIdsInPreferredOrder.add(FRAME_ID_COMMERCIAL_FRAME);
        frameIdsInPreferredOrder.add(FRAME_ID_COPYRIGHTINFO);
        frameIdsInPreferredOrder.add(FRAME_ID_ENCODEDBY);
        frameIdsInPreferredOrder.add(FRAME_ID_ENCODING_TIME);
        frameIdsInPreferredOrder.add(FRAME_ID_ENCRYPTION);
        frameIdsInPreferredOrder.add(FRAME_ID_EQUALISATION2);
        frameIdsInPreferredOrder.add(FRAME_ID_EVENT_TIMING_CODES);
        frameIdsInPreferredOrder.add(FRAME_ID_FILE_OWNER);
        frameIdsInPreferredOrder.add(FRAME_ID_FILE_TYPE);
        frameIdsInPreferredOrder.add(FRAME_ID_GROUP_ID_REG);
        frameIdsInPreferredOrder.add(FRAME_ID_HW_SW_SETTINGS);
        frameIdsInPreferredOrder.add(FRAME_ID_INITIAL_KEY);
        frameIdsInPreferredOrder.add(FRAME_ID_LENGTH);
        frameIdsInPreferredOrder.add(FRAME_ID_LINKED_INFO);
        frameIdsInPreferredOrder.add(FRAME_ID_MOOD);
        frameIdsInPreferredOrder.add(FRAME_ID_MPEG_LOCATION_LOOKUP_TABLE);
        frameIdsInPreferredOrder.add(FRAME_ID_MUSICIAN_CREDITS);
        frameIdsInPreferredOrder.add(FRAME_ID_ORIGARTIST);
        frameIdsInPreferredOrder.add(FRAME_ID_ORIGINAL_RELEASE_TIME);
        frameIdsInPreferredOrder.add(FRAME_ID_ORIG_FILENAME);
        frameIdsInPreferredOrder.add(FRAME_ID_ORIG_LYRICIST);
        frameIdsInPreferredOrder.add(FRAME_ID_ORIG_TITLE);
        frameIdsInPreferredOrder.add(FRAME_ID_OWNERSHIP);
        frameIdsInPreferredOrder.add(FRAME_ID_POSITION_SYNC);
        frameIdsInPreferredOrder.add(FRAME_ID_PRODUCED_NOTICE);
        frameIdsInPreferredOrder.add(FRAME_ID_RADIO_NAME);
        frameIdsInPreferredOrder.add(FRAME_ID_RADIO_OWNER);
        frameIdsInPreferredOrder.add(FRAME_ID_RECOMMENDED_BUFFER_SIZE);
        frameIdsInPreferredOrder.add(FRAME_ID_RELATIVE_VOLUME_ADJUSTMENT2);
        frameIdsInPreferredOrder.add(FRAME_ID_RELEASE_TIME);
        frameIdsInPreferredOrder.add(FRAME_ID_REMIXED);
        frameIdsInPreferredOrder.add(FRAME_ID_REVERB);
        frameIdsInPreferredOrder.add(FRAME_ID_SEEK);
        frameIdsInPreferredOrder.add(FRAME_ID_SET);
        frameIdsInPreferredOrder.add(FRAME_ID_SET_SUBTITLE);
        frameIdsInPreferredOrder.add(FRAME_ID_SIGNATURE);
        frameIdsInPreferredOrder.add(FRAME_ID_SYNC_LYRIC);
        frameIdsInPreferredOrder.add(FRAME_ID_SYNC_TEMPO);
        frameIdsInPreferredOrder.add(FRAME_ID_TAGGING_TIME);
        frameIdsInPreferredOrder.add(FRAME_ID_TERMS_OF_USE);

        //Want this near the end because can cause problems with unsyncing
        frameIdsInPreferredOrder.add(FRAME_ID_ATTACHED_PICTURE);

        //Itunes doesnt seem to like these, and of little use so put right at end
        frameIdsInPreferredOrder.add(FRAME_ID_PRIVATE);
        frameIdsInPreferredOrder.add(FRAME_ID_MUSIC_CD_ID);
        frameIdsInPreferredOrder.add(FRAME_ID_AUDIO_ENCRYPTION);
        frameIdsInPreferredOrder.add(FRAME_ID_GENERAL_ENCAPS_OBJECT);

    }

    private ID3v24PreferredFrameOrderComparator()
    {

    }

    public static ID3v24PreferredFrameOrderComparator getInstanceof()
    {
        if (comparator == null)
        {
            comparator = new ID3v24PreferredFrameOrderComparator();
        }
        return comparator;
    }


    /**
     * @param frameId1
     * @param frameId2
     * @return
     */
    public int compare(String frameId1, String frameId2)
    {
        int frameId1Index = frameIdsInPreferredOrder.indexOf(frameId1);
        int frameId2Index = frameIdsInPreferredOrder.indexOf(frameId2);
        return frameId1Index - frameId2Index;
    }

    public boolean equals(Object obj)
    {
        return obj instanceof ID3v24PreferredFrameOrderComparator;
    }

}