using FluentMigrator;
using NzbDrone.Core.Datastore.Migration.Framework;

namespace NzbDrone.Core.Datastore.Migration
{
    [Migration(28)]
    public class clean_artist_metadata_table : NzbDroneMigrationBase
    {
        protected override void MainDbUpgrade()
        {
            // Remove any artists linked to missing metadata
            Execute.Sql(@"DELETE FROM ""Artists""
                          WHERE ""Id"" in (
                          SELECT ""Artists"".""Id"" from ""Artists""
                          LEFT OUTER JOIN ""ArtistMetadata"" ON ""Artists"".""ArtistMetadataId"" = ""ArtistMetadata"".""Id""
                          WHERE ""ArtistMetadata"".""Id"" IS NULL)");

            // Remove any albums linked to missing metadata
            Execute.Sql(@"DELETE FROM ""Albums""
                          WHERE ""Id"" in (
                          SELECT ""Albums"".""Id"" from ""Albums""
                          LEFT OUTER JOIN ""ArtistMetadata"" ON ""Albums"".""ArtistMetadataId"" = ""ArtistMetadata"".""Id""
                          WHERE ""ArtistMetadata"".""Id"" IS NULL)");

            // Remove any album releases linked to albums that were deleted
            Execute.Sql(@"DELETE FROM ""AlbumReleases""
                          WHERE ""Id"" in (
                          SELECT ""AlbumReleases"".""Id"" from ""AlbumReleases""
                          LEFT OUTER JOIN ""Albums"" ON ""Albums"".""Id"" = ""AlbumReleases"".""AlbumId""
                          WHERE ""Albums"".""Id"" IS NULL)");

            // Remove any tracks linked to album releases that were deleted
            Execute.Sql(@"DELETE FROM ""Tracks""
                          WHERE ""Id"" in (
                          SELECT ""Tracks"".""Id"" from ""Tracks""
                          LEFT OUTER JOIN ""AlbumReleases"" ON ""Tracks"".""AlbumReleaseId"" = ""AlbumReleases"".""Id""
                          WHERE ""AlbumReleases"".""Id"" IS NULL)");

            // Remove any tracks linked to the original missing metadata
            Execute.Sql(@"DELETE FROM ""Tracks""
                          WHERE ""Id"" in (
                          SELECT ""Tracks"".""Id"" from ""Tracks""
                          LEFT OUTER JOIN ""ArtistMetadata"" ON ""Tracks"".""ArtistMetadataId"" = ""ArtistMetadata"".""Id""
                          WHERE ""ArtistMetadata"".""Id"" IS NULL)");

            // Remove any trackfiles linked to the deleted tracks
            Execute.Sql(@"DELETE FROM ""TrackFiles""
                          WHERE ""Id"" IN (
                          SELECT ""TrackFiles"".""Id"" FROM ""TrackFiles""
                          LEFT OUTER JOIN ""Tracks""
                          ON ""TrackFiles"".""Id"" = ""Tracks"".""TrackFileId""
                          WHERE ""Tracks"".""Id"" IS NULL)");
        }
    }
}