namespace Evergreen.Health.Application.Health.Scenes;

public interface ILightOffHandler
{
    Task HandleAsync(CancellationToken cancellationToken);
}

/// <summary>跨设备联动由场景层分发；灯具不需要知道其他家具实体。</summary>
public sealed class LightOffDispatcher
{
    private readonly IReadOnlyList<ILightOffHandler> _handlers;
    public LightOffDispatcher(IEnumerable<ILightOffHandler> handlers) => _handlers = handlers.ToArray();
    public async Task NotifyAsync(CancellationToken cancellationToken)
    {
        var failures = new List<Exception>();
        foreach (var handler in _handlers)
        {
            cancellationToken.ThrowIfCancellationRequested();
            try { await handler.HandleAsync(cancellationToken); }
            catch (Exception exception) when (exception is not OperationCanceledException) { failures.Add(exception); }
        }
        if (failures.Count > 0)
            throw new AggregateException("灯光已关闭，但部分安全联动未完成", failures);
    }
}