using System;
using System.Threading.Tasks;
using FrameworkBLL.SystemJob;
using Microsoft.AspNetCore.SignalR;
using Microsoft.Extensions.Logging;

namespace FrameworkSL.Hubs.SysJob
{
    // ============================================================
    // SysJobHubNotifier — SL implementation of ISysJobHubNotifier.
    //
    // Wraps IHubContext<SysJobHub, ISysJobClient> so that
    // FrameworkBLL (SysJobShareBLL) can push real-time notifications
    // to specific users without referencing ASP.NET types directly.
    //
    // Registration:
    //   services.AddSingleton<ISysJobHubNotifier, SysJobHubNotifier>();
    // ============================================================
    public class SysJobHubNotifier : ISysJobHubNotifier
    {
        private readonly IHubContext<SysJobHub, ISysJobClient> _hub;
        private readonly ILogger<SysJobHubNotifier>            _logger;

        public SysJobHubNotifier(
            IHubContext<SysJobHub, ISysJobClient> hub,
            ILogger<SysJobHubNotifier>            logger)
        {
            _hub    = hub;
            _logger = logger;
        }

        public async Task NotifyJobSharedAsync(int recipientUserId, int sysJobId, string sharedByName)
        {
            try
            {
                await _hub.Clients
                    .Group(SysJobHub.UserGroup(recipientUserId))
                    .JobShared(sysJobId, sharedByName);
            }
            catch (Exception ex)
            {
                _logger.LogWarning(ex,
                    "SysJobHubNotifier: failed to push JobShared to user {UserId} for job {SysJobId}",
                    recipientUserId, sysJobId);
            }
        }
    }
}