using System;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;

namespace FrameworkBLL.Promotion
{
    public class PromotionExchangePendingPackageDTO
    {
        public int PackageId { get; set; }
        public string OriginEnvironmentCode { get; set; } = string.Empty;
        public int PackageSizeBytes { get; set; }
        public DateTime UploadedOn { get; set; }
    }

    // Thin HTTP wrapper around the separate PromotionExchange module's own endpoints (a different
    // process/host entirely -- Tier 2 store-and-forward, see the plan's Transport section). Never
    // throws on a transport failure -- Exchange reachability is inherently best-effort (that's the
    // whole point of also having Tier 1 manual carry), so every method returns null/empty on error
    // rather than propagating, matching JobEngineScheduleClient's established "non-fatal by design"
    // convention for this kind of optional cross-module HTTP call.
    public interface IPromotionExchangeClient
    {
        Task<int?> UploadAsync(byte[] packageBytes, string destinationEnvironmentCode, CancellationToken ct);
        Task<IReadOnlyList<PromotionExchangePendingPackageDTO>> ListPendingAsync(CancellationToken ct);
        Task<byte[]?> DownloadAsync(int packageId, CancellationToken ct);
    }
}