using ErsatzTV.Core.Domain;
using ErsatzTV.Core.Interfaces.Repositories;
using static ErsatzTV.Application.Libraries.Mapper;

namespace ErsatzTV.Application.Libraries;

public class GetConfiguredLibrariesHandler : IRequestHandler<GetConfiguredLibraries, List<LibraryViewModel>>
{
    private readonly ILibraryRepository _libraryRepository;

    public GetConfiguredLibrariesHandler(ILibraryRepository libraryRepository) =>
        _libraryRepository = libraryRepository;

    public Task<List<LibraryViewModel>> Handle(
        GetConfiguredLibraries request,
        CancellationToken cancellationToken) =>
        _libraryRepository.GetAll()
            .Map(
                list => list.Filter(ShouldIncludeLibrary)
                    .OrderBy(l => l.MediaSource is LocalMediaSource ? 0 : 1)
                    .ThenBy(l => l.GetType().Name)
                    .ThenBy(l => l.MediaKind)
                    .Map(ProjectToViewModel).ToList());

    private static bool ShouldIncludeLibrary(Library library) =>
        library switch
        {
            LocalLibrary => library.Paths.Count > 0,
            PlexLibrary plex => plex.ShouldSyncItems,
            JellyfinLibrary jellyfin => jellyfin.ShouldSyncItems,
            EmbyLibrary emby => emby.ShouldSyncItems,
            _ => false
        };
}