namespace QMSDAL.DTO
{
    // One pickable entry in the Select Serial list — a number that's actually
    // free to pick right now: either a previously-skipped TLOT row (Status=0,
    // reactivated on save) or a never-issued number within the current
    // AvailableQty range (no TLOT row yet — created fresh on save if picked,
    // or written as a new Status=0 row if left unpicked).
    public class SelectableSerialDTO
    {
        public int RunningNumber { get; set; }
        public string LotNumber { get; set; } = string.Empty;

        /// <summary>Always "Available".</summary>
        public string Source { get; set; } = string.Empty;

        /// <summary>The existing TLOT row's LotId for a previously-skipped entry. -1 for a not-yet-created fresh number.</summary>
        public int LotId { get; set; } = -1;
    }

    // Response for GetSelectableSerials — the pickable pool for one FG item's
    // next run: previously-skipped numbers (e.g. 2538 and 2542 left over from
    // an earlier pick of 2539,2540 out of a 6-wide 2538-2543 range) PLUS a
    // fresh sequential range sized to the item's current AvailableQty
    // (TotalQuantity − ReservedQuantity, same value shown on the Composition
    // table), starting right after LastRun. Never includes historical
    // already-issued serials from unrelated past runs. Empty when AvailableQty
    // is 0 and no skipped stock exists (e.g. a first-ever run) — the caller
    // falls back to normal auto-generation for this run.
    public class SelectableSerialPicklistDTO
    {
        public int ItemId { get; set; }
        public string ItemCode { get; set; } = string.Empty;
        public string ItemName { get; set; } = string.Empty;

        /// <summary>Quantity required per set for this component (from its BOM).</summary>
        public int QtyPerSet { get; set; }

        /// <summary>Number of sets this run covers — echoes the caller's SetsToGenerate (defaults to 1 if omitted).</summary>
        public int SetsToGenerate { get; set; }

        /// <summary>QtyPerSet × SetsToGenerate — the exact total count the user must pick from Picklist for this run.</summary>
        public int RequiredQty { get; set; }

        /// <summary>Highest running number ever actually issued (Status=1) for this item. 0 if never issued.</summary>
        public int LastRun { get; set; }

        /// <summary>Total pickable entries. Same as Picklist.Count.</summary>
        public int AvailableCount { get; set; }

        /// <summary>The pickable pool, sorted ascending by RunningNumber. Empty if nothing is available to pick.</summary>
        public List<SelectableSerialDTO> Picklist { get; set; } = new();
    }
}