WFDASH-WEBAPP/src/lib/collection-driver-verdict.ts

import type { CollectionAiCheck } from "@/lib/types";
import { computeLineTicks } from "@/lib/collection-ai-ticks";

export type DriverVerdict = "green" | "amber" | "red" | "unchecked";

export interface DriverLineVerdict {
  id: string;
  kind: "customer" | "stock";
  description: string;
  qty_collected: number;
  verdict: DriverVerdict;
  /** One short plain sentence for the driver; empty when green. */
  reason: string;
}

type Row = {
  id: string;
  kind: "customer" | "stock";
  description?: string;
  sku: string;
  qty_collected: number;
  order_qty: number;
  cost_price: number | null;
  ai_check: CollectionAiCheck | null;
};

/**
 * What the driver needs to know at the supplier counter: is it the right
 * product, in the right quantity? Price and SKU are the office's concern
 * and never turn a driver's line amber or red.
 */
export function driverVerdict(row: Row): DriverLineVerdict {
  const base = {
    id: row.id,
    kind: row.kind,
    description: row.description ?? "",
    qty_collected: row.qty_collected,
  };
  const check = row.ai_check;
  if (!check || (check.pair_failed && !check.doc_line)) {
    return { ...base, verdict: "unchecked", reason: "" };
  }
  const doc = check.doc_line;
  if (!doc || (check.same_item !== "sure" && check.same_item !== "likely")) {
    return {
      ...base,
      verdict: "red",
      reason: check.reason || "Not found on the invoice photo.",
    };
  }
  const t = computeLineTicks(
    { sku: row.sku, qty_collected: row.qty_collected, order_qty: row.order_qty, cost_price: row.cost_price },
    check,
  );
  if (t.qty === "red") {
    return {
      ...base,
      verdict: "red",
      reason: `Invoice says ${doc.quantity}, you collected ${row.qty_collected}.`,
    };
  }
  if (t.qty === "amber") {
    return { ...base, verdict: "amber", reason: `Invoice says ${doc.quantity}, ordered ${row.order_qty}.` };
  }
  if (t.desc === "amber") {
    return { ...base, verdict: "amber", reason: check.reason || "Looks like the same item, but not certain." };
  }
  return { ...base, verdict: "green", reason: "" };
}