using Musify.Domain.Entities;
using Musify.Domain.ValueObjects;

namespace Musify.Application.Albums.Responses
{
    public static class AlbumProjections
    {
        public const int CoverTrackCount = 4;

        public static IQueryable<Album> Active(this IQueryable<Album> query) =>
            query.Where(album => album.LifeCycleStatus == LifeCycleStatus.Active);

        public static IQueryable<AlbumApplicationResponse> SelectResponse(this IQueryable<Album> query) =>
            query.Select(album => new AlbumApplicationResponse(
                album.Id,
                album.Title,
                album.Description,
                album.ReleaseYear,
                album.OwnerUserId,
                album.AlbumTracks.Count(albumTrack => albumTrack.Track.LifeCycleStatus == LifeCycleStatus.Active && albumTrack.Track.IsPublished),
                album.Pictures!.SmallName,
                album.Pictures!.MediumName,
                album.Pictures!.LargeName,
                album.CreatedAt,
                album.UpdatedAt,
                album.AlbumTracks
                    .Where(albumTrack => albumTrack.Track.LifeCycleStatus == LifeCycleStatus.Active && albumTrack.Track.IsPublished)
                    .OrderBy(albumTrack => albumTrack.TrackNumber)
                    .Take(CoverTrackCount)
                    .Select(albumTrack => albumTrack.TrackId)
                    .ToList(),
                album.Type));
    }
}