using GB5Shared.DALCache;
using Microsoft.Extensions.DependencyInjection;

namespace FrameworkBLL.SystemJob;

/// <summary>
/// A host's own module blanket-scanning FrameworkBLL/FrameworkDAL (to reuse a shared BLL like
/// ISubscriptionBLL/IAttachmentUploadService) pulls in every other class in those assemblies too
/// — including some whose real dependency only makes sense on FrameworkSL itself. Call this once
/// alongside that scan to satisfy those without pulling in a whole separate host's library.
/// Used by EntitlementModule.cs, DMSModule.cs, EcpModule.cs.
/// </summary>
public static class CrossHostFrameworkBllSupport
{
    public static void AddFrameworkBllCrossHostSupport(this IServiceCollection services)
    {
        // SysJobShareBLL needs ISysJobHubNotifier. The real implementation
        // (FrameworkSL.SysJobHubNotifier) notifies SignalR clients connected to SysJobHub, which
        // only FrameworkSL itself ever maps — a no-op here is correct, not a workaround: there are
        // never any connected clients to notify on a host that doesn't host that hub.
        services.AddScoped<ISysJobHubNotifier, NoOpSysJobHubNotifier>();

        // ReportViewBLL needs IDALCache, a GB5Shared type not covered by a FrameworkBLL/FrameworkDAL
        // assembly scan.
        services.AddScoped<IDALCache, DALCache>();
    }

    private sealed class NoOpSysJobHubNotifier : ISysJobHubNotifier
    {
        public Task NotifyJobSharedAsync(int recipientUserId, int sysJobId, string sharedByName)
            => Task.CompletedTask;
    }
}