#nullable enable
using ErsatzTV.Core.Api.MediaSources;
using ErsatzTV.Core.Interfaces.Locking;

namespace ErsatzTV.Application.MediaSources;

// Reports which media-source families currently hold their external-collections scan lock. The lock
// is the running scan (the scan-collections controllers acquire it before enqueueing and the scanner
// releases it on completion), so IEntityLocker is the authoritative source — analogous to how
// GetLibraryScanStatus reads IScannerProxyService.GetActiveScans(). Collections locks are family-global,
// so this returns at most one entry per family, and only for families actively scanning.
public class GetCollectionsScanStatusHandler(IEntityLocker entityLocker)
    : IRequestHandler<GetCollectionsScanStatus, List<CollectionsScanStatusResponseModel>>
{
    public Task<List<CollectionsScanStatusResponseModel>> Handle(
        GetCollectionsScanStatus request,
        CancellationToken cancellationToken)
    {
        var result = new List<CollectionsScanStatusResponseModel>();

        if (entityLocker.ArePlexCollectionsLocked())
        {
            result.Add(new CollectionsScanStatusResponseModel("plex"));
        }

        if (entityLocker.AreJellyfinCollectionsLocked())
        {
            result.Add(new CollectionsScanStatusResponseModel("jellyfin"));
        }

        if (entityLocker.AreEmbyCollectionsLocked())
        {
            result.Add(new CollectionsScanStatusResponseModel("emby"));
        }

        return Task.FromResult(result);
    }
}