using Dapper;
using NzbDrone.Core.Datastore;

namespace NzbDrone.Core.Housekeeping.Housekeepers
{
    public class CleanupOrphanedBookFiles : IHousekeepingTask
    {
        private readonly IMainDatabase _database;

        public CleanupOrphanedBookFiles(IMainDatabase database)
        {
            _database = database;
        }

        public void Clean()
        {
            using (var mapper = _database.OpenConnection())
            {
                // Unlink where track no longer exists
                mapper.Execute(@"UPDATE ""BookFiles""
                                     SET ""EditionId"" = 0
                                     WHERE ""Id"" IN (
                                     SELECT ""BookFiles"".""Id"" FROM ""BookFiles""
                                     LEFT OUTER JOIN ""Editions""
                                     ON ""BookFiles"".""EditionId"" = ""Editions"".""Id""
                                     WHERE ""Editions"".""Id"" IS NULL)");
            }
        }
    }
}
