using ErsatzTV.Core;
using ErsatzTV.Core.Domain;
using ErsatzTV.Core.Interfaces.Repositories;
using ErsatzTV.Infrastructure.Data;
using ErsatzTV.Infrastructure.Extensions;
using Microsoft.EntityFrameworkCore;
using static ErsatzTV.Application.MediaCards.Mapper;

namespace ErsatzTV.Application.MediaCards;

public class GetCollectionCardsHandler :
    IRequestHandler<GetCollectionCards, Either<BaseError, CollectionCardResultsViewModel>>
{
    private readonly IDbContextFactory<TvContext> _dbContextFactory;
    private readonly IMediaSourceRepository _mediaSourceRepository;

    public GetCollectionCardsHandler(
        IDbContextFactory<TvContext> dbContextFactory,
        IMediaSourceRepository mediaSourceRepository)
    {
        _dbContextFactory = dbContextFactory;
        _mediaSourceRepository = mediaSourceRepository;
    }

    public async Task<Either<BaseError, CollectionCardResultsViewModel>> Handle(
        GetCollectionCards request,
        CancellationToken cancellationToken)
    {
        await using TvContext dbContext = await _dbContextFactory.CreateDbContextAsync(cancellationToken);

        Option<JellyfinMediaSource> maybeJellyfin = await _mediaSourceRepository.GetAllJellyfin()
            .Map(list => list.HeadOrNone());

        Option<EmbyMediaSource> maybeEmby = await _mediaSourceRepository.GetAllEmby()
            .Map(list => list.HeadOrNone());

        return await dbContext.Collections
            .AsNoTracking()
            .Include(c => c.CollectionItems)
            .Include(c => c.MediaItems)
            .ThenInclude(i => i.LibraryPath)
            .Include(c => c.MediaItems)
            .ThenInclude(i => (i as Movie).MovieMetadata)
            .ThenInclude(mm => mm.Artwork)
            .Include(c => c.MediaItems)
            .ThenInclude(i => (i as Movie).MediaVersions)
            .ThenInclude(mv => mv.MediaFiles)
            .Include(c => c.MediaItems)
            .ThenInclude(i => (i as Artist).ArtistMetadata)
            .ThenInclude(mvm => mvm.Artwork)
            .Include(c => c.MediaItems)
            .ThenInclude(i => (i as MusicVideo).MusicVideoMetadata)
            .ThenInclude(mvm => mvm.Artwork)
            .Include(c => c.MediaItems)
            .ThenInclude(i => (i as MusicVideo).Artist)
            .ThenInclude(a => a.ArtistMetadata)
            .Include(c => c.MediaItems)
            .ThenInclude(i => (i as MusicVideo).MediaVersions)
            .ThenInclude(mv => mv.MediaFiles)
            .Include(c => c.MediaItems)
            .ThenInclude(i => (i as Show).ShowMetadata)
            .ThenInclude(sm => sm.Artwork)
            .Include(c => c.MediaItems)
            .ThenInclude(i => (i as Season).SeasonMetadata)
            .ThenInclude(sm => sm.Artwork)
            .Include(c => c.MediaItems)
            .ThenInclude(i => (i as Season).Show)
            .ThenInclude(s => s.ShowMetadata)
            .Include(c => c.MediaItems)
            .ThenInclude(i => (i as Episode).EpisodeMetadata)
            .ThenInclude(em => em.Artwork)
            .Include(c => c.MediaItems)
            .ThenInclude(i => (i as Episode).EpisodeMetadata)
            .ThenInclude(em => em.Directors)
            .Include(c => c.MediaItems)
            .ThenInclude(i => (i as Episode).EpisodeMetadata)
            .ThenInclude(em => em.Writers)
            .Include(c => c.MediaItems)
            .ThenInclude(i => (i as Episode).Season)
            .ThenInclude(s => s.Show)
            .ThenInclude(s => s.ShowMetadata)
            .Include(c => c.MediaItems)
            .ThenInclude(i => (i as Episode).Season)
            .ThenInclude(s => s.SeasonMetadata)
            .Include(c => c.MediaItems)
            .ThenInclude(i => (i as Episode).MediaVersions)
            .ThenInclude(mv => mv.MediaFiles)
            .Include(c => c.MediaItems)
            .ThenInclude(i => (i as OtherVideo).OtherVideoMetadata)
            .ThenInclude(ovm => ovm.Artwork)
            .Include(c => c.MediaItems)
            .ThenInclude(i => (i as OtherVideo).MediaVersions)
            .ThenInclude(mv => mv.MediaFiles)
            .Include(c => c.MediaItems)
            .ThenInclude(i => (i as Song).SongMetadata)
            .ThenInclude(ovm => ovm.Artwork)
            .Include(c => c.MediaItems)
            .ThenInclude(i => (i as Song).MediaVersions)
            .ThenInclude(mv => mv.MediaFiles)
            .Include(c => c.MediaItems)
            .ThenInclude(i => (i as Image).ImageMetadata)
            .ThenInclude(ovm => ovm.Artwork)
            .Include(c => c.MediaItems)
            .ThenInclude(i => (i as Image).MediaVersions)
            .ThenInclude(mv => mv.MediaFiles)
            .SelectOneAsync(c => c.Id, c => c.Id == request.Id)
            .Map(c => c.ToEither(BaseError.New("Unable to load collection")))
            .MapT(c => ProjectToViewModel(c, maybeJellyfin, maybeEmby));
    }
}