using ErsatzTV.Core.Domain;
using ErsatzTV.Core.Extensions;
using ErsatzTV.Core.Interfaces.Emby;
using ErsatzTV.Core.Interfaces.Metadata;
using ErsatzTV.Core.Interfaces.Repositories;
using ErsatzTV.Core.Interfaces.Repositories.Caching;
using ErsatzTV.Core.Interfaces.Search;
using ErsatzTV.Core.Metadata;
using MediatR;
using Microsoft.Extensions.Logging;

namespace ErsatzTV.Core.Emby;

public class EmbyTelevisionLibraryScanner : MediaServerTelevisionLibraryScanner<EmbyConnectionParameters, EmbyLibrary,
    EmbyShow, EmbySeason, EmbyEpisode,
    EmbyItemEtag>, IEmbyTelevisionLibraryScanner
{
    private readonly IEmbyApiClient _embyApiClient;
    private readonly IMediaSourceRepository _mediaSourceRepository;
    private readonly IEmbyPathReplacementService _pathReplacementService;
    private readonly IEmbyTelevisionRepository _televisionRepository;

    public EmbyTelevisionLibraryScanner(
        IEmbyApiClient embyApiClient,
        IMediaSourceRepository mediaSourceRepository,
        IEmbyTelevisionRepository televisionRepository,
        ISearchIndex searchIndex,
        ICachingSearchRepository searchRepository,
        IFallbackMetadataProvider fallbackMetadataProvider,
        IEmbyPathReplacementService pathReplacementService,
        ILocalFileSystem localFileSystem,
        ILocalStatisticsProvider localStatisticsProvider,
        ILocalSubtitlesProvider localSubtitlesProvider,
        IMediator mediator,
        ILogger<EmbyTelevisionLibraryScanner> logger)
        : base(
            localStatisticsProvider,
            localSubtitlesProvider,
            localFileSystem,
            searchRepository,
            searchIndex,
            fallbackMetadataProvider,
            mediator,
            logger)
    {
        _embyApiClient = embyApiClient;
        _mediaSourceRepository = mediaSourceRepository;
        _televisionRepository = televisionRepository;
        _pathReplacementService = pathReplacementService;
    }

    public async Task<Either<BaseError, Unit>> ScanLibrary(
        string address,
        string apiKey,
        EmbyLibrary library,
        string ffmpegPath,
        string ffprobePath,
        CancellationToken cancellationToken)
    {
        List<EmbyPathReplacement> pathReplacements =
            await _mediaSourceRepository.GetEmbyPathReplacements(library.MediaSourceId);

        string GetLocalPath(EmbyEpisode episode)
        {
            return _pathReplacementService.GetReplacementEmbyPath(
                pathReplacements,
                episode.GetHeadVersion().MediaFiles.Head().Path,
                false);
        }

        return await ScanLibrary(
            _televisionRepository,
            new EmbyConnectionParameters(address, apiKey),
            library,
            GetLocalPath,
            ffmpegPath,
            ffprobePath,
            false,
            cancellationToken);
    }

    protected override Task<Either<BaseError, int>> CountShowLibraryItems(
        EmbyConnectionParameters connectionParameters,
        EmbyLibrary library)
        => _embyApiClient.GetLibraryItemCount(
            connectionParameters.Address,
            connectionParameters.ApiKey,
            library.ItemId,
            EmbyItemType.Show);

    protected override IAsyncEnumerable<EmbyShow> GetShowLibraryItems(
        EmbyConnectionParameters connectionParameters,
        EmbyLibrary library) =>
        _embyApiClient.GetShowLibraryItems(connectionParameters.Address, connectionParameters.ApiKey, library);

    protected override string MediaServerItemId(EmbyShow show) => show.ItemId;
    protected override string MediaServerItemId(EmbySeason season) => season.ItemId;
    protected override string MediaServerItemId(EmbyEpisode episode) => episode.ItemId;

    protected override string MediaServerEtag(EmbyShow show) => show.Etag;
    protected override string MediaServerEtag(EmbySeason season) => season.Etag;
    protected override string MediaServerEtag(EmbyEpisode episode) => episode.Etag;

    protected override Task<Either<BaseError, int>> CountSeasonLibraryItems(
        EmbyConnectionParameters connectionParameters,
        EmbyLibrary library,
        EmbyShow show) =>
        _embyApiClient.GetLibraryItemCount(
            connectionParameters.Address,
            connectionParameters.ApiKey,
            show.ItemId,
            EmbyItemType.Season);

    protected override IAsyncEnumerable<EmbySeason> GetSeasonLibraryItems(
        EmbyLibrary library,
        EmbyConnectionParameters connectionParameters,
        EmbyShow show) =>
        _embyApiClient.GetSeasonLibraryItems(
            connectionParameters.Address,
            connectionParameters.ApiKey,
            library,
            show.ItemId);

    protected override Task<Either<BaseError, int>> CountEpisodeLibraryItems(
        EmbyConnectionParameters connectionParameters,
        EmbyLibrary library,
        EmbySeason season) =>
        _embyApiClient.GetLibraryItemCount(
            connectionParameters.Address,
            connectionParameters.ApiKey,
            season.ItemId,
            EmbyItemType.Episode);

    protected override IAsyncEnumerable<EmbyEpisode> GetEpisodeLibraryItems(
        EmbyLibrary library,
        EmbyConnectionParameters connectionParameters,
        EmbyShow show,
        EmbySeason season) =>
        _embyApiClient.GetEpisodeLibraryItems(
            connectionParameters.Address,
            connectionParameters.ApiKey,
            library,
            show.ItemId,
            season.ItemId);

    protected override Task<Option<ShowMetadata>> GetFullMetadata(
        EmbyConnectionParameters connectionParameters,
        EmbyLibrary library,
        MediaItemScanResult<EmbyShow> result,
        EmbyShow incoming,
        bool deepScan) =>
        Task.FromResult(Option<ShowMetadata>.None);

    protected override Task<Option<SeasonMetadata>> GetFullMetadata(
        EmbyConnectionParameters connectionParameters,
        EmbyLibrary library,
        MediaItemScanResult<EmbySeason> result,
        EmbySeason incoming,
        bool deepScan) =>
        Task.FromResult(Option<SeasonMetadata>.None);

    protected override Task<Option<EpisodeMetadata>> GetFullMetadata(
        EmbyConnectionParameters connectionParameters,
        EmbyLibrary library,
        MediaItemScanResult<EmbyEpisode> result,
        EmbyEpisode incoming,
        bool deepScan) =>
        Task.FromResult(Option<EpisodeMetadata>.None);

    protected override Task<Either<BaseError, MediaItemScanResult<EmbyShow>>> UpdateMetadata(
        MediaItemScanResult<EmbyShow> result,
        ShowMetadata fullMetadata) =>
        Task.FromResult<Either<BaseError, MediaItemScanResult<EmbyShow>>>(result);

    protected override Task<Either<BaseError, MediaItemScanResult<EmbySeason>>> UpdateMetadata(
        MediaItemScanResult<EmbySeason> result,
        SeasonMetadata fullMetadata) =>
        Task.FromResult<Either<BaseError, MediaItemScanResult<EmbySeason>>>(result);

    protected override Task<Either<BaseError, MediaItemScanResult<EmbyEpisode>>> UpdateMetadata(
        MediaItemScanResult<EmbyEpisode> result,
        EpisodeMetadata fullMetadata) =>
        Task.FromResult<Either<BaseError, MediaItemScanResult<EmbyEpisode>>>(result);
}