namespace MMDAL.DTO.VendorComparison
{
    // Type=0 ("Summary") response row — one per unique {ItemId, SkuId, UomId, Quantity, Remarks}.
    // GB4 never ran a separate SQL query for this: MMHeadBLL.GetVendorComparison groups the same
    // Detail rows in-memory and takes the first of each group. GB5 does the same (see
    // VendorComparisonBLL.GetVendorComparison) rather than duplicating the query.
    public class VendorComparisonSummaryDTO
    {
        public int ItemSlNo { get; set; }
        public int ItemId { get; set; }
        public string ItemCode { get; set; } = "";
        public string ItemName { get; set; } = "";
        public int SkuId { get; set; }
        public string SkuCode { get; set; } = "";
        public string SkuName { get; set; } = "";
        public decimal? Quantity { get; set; }
        public int UomId { get; set; }
        public string? UomCode { get; set; }
        public string? UomName { get; set; }
        public string? Remarks { get; set; }

        // Top-4-by-OverallRank vendor comparison, per explicit design confirmation (GB4 never
        // implemented these — no source SQL/DTO field existed there at all). V1 = OverallRank 1
        // (best), V2 = rank 2, etc.; null when this item has fewer than that many vendors.
        // Value shown depends on the caller's MetricType (see VendorComparisonBLL):
        //   0=Rate, 1=Cost(NetCost), 2=DeliveryRank, 3=QualityRank, 4=OverallRank.
        // Grade (5) is intentionally unsupported — no confirmed per-vendor grade source exists.
        public decimal? V1 { get; set; }
        public decimal? V2 { get; set; }
        public decimal? V3 { get; set; }
        public decimal? V4 { get; set; }

        // Which of V1-V4 has the best value for the active metric — "lower wins" for
        // Rate/Cost/DeliveryRank/QualityRank/OverallRank (all of them, since ranks are
        // already "lower = better" and Rate/Cost are cheaper-is-better). Slot label
        // ("V1".."V4"), not the vendor's own PartyCode — matches the UI's column labels.
        public string? BestFit { get; set; }

        // How many vendors are actually configured in MITEMPARTY for this item/sku (not capped
        // at 4, unlike V1-V4). Disambiguates the two reasons V1-V4 can all be null: VendorCount=0
        // means no vendor is configured at all; VendorCount>0 with V1-V4 still null means vendors
        // exist but none have a value for the currently-selected MetricType (e.g. no Rate entered
        // yet) — the client can't tell those apart from V1-V4 alone.
        public int VendorCount { get; set; }
    }
}