import type { OrderItem } from "@/lib/types";

/**
 * An order is "Complete" iff it has at least one line item and every
 * line item is `delivered`. This is the only order-level indicator we
 * render — there is no stored `orders.status` field to keep in sync.
 *
 * Why this is its own helper instead of inlined at the call site:
 *   - Centralises the rule (one place to change if "complete" ever
 *     gains another condition, e.g. "all items delivered AND invoiced").
 *   - Locks the contract with a unit test (see order-completion.test.ts).
 *   - Pure function — easy to test without touching PocketBase.
 *
 * Note: an order with **zero** items is intentionally NOT complete.
 * The /orders list treats no-items as a degenerate case (the row
 * collapses to an empty item list) — we don't want an empty draft
 * order to wear a green "Complete" badge.
 */
export function isOrderComplete(items: OrderItem[] | null | undefined): boolean {
  if (!items || items.length === 0) return false;
  return items.every((i) => i.item_status === "delivered");
}