import { describe, it, expect } from "vitest";
import { isOrderComplete } from "./order-completion";
import type { OrderItem } from "@/lib/types";

/**
 * Minimal OrderItem factory — only the field the helper reads
 * (`item_status`). Default `item_status = "pending"` so each test
 * only sets what it cares about.
 */
function item(
  partial: Partial<OrderItem> & { item_status: OrderItem["item_status"] }
): OrderItem {
  return {
    id: "x",
    created: "",
    updated: "",
    collectionId: "",
    collectionName: "order_items",
    order: "o1",
    description: "d",
    po_description: "",
    quantity: 1,
    order_qty: 1,
    selling_price: 0,
    supplier: "",
    cost_price: 0,
    markup: 0,
    purchase_order: "",
    in_stock: false,
    notes: "",
    ...partial,
  };
}

describe("isOrderComplete", () => {
  it("returns false for an empty items array (draft order)", () => {
    expect(isOrderComplete([])).toBe(false);
  });

  it("returns false for null/undefined items", () => {
    expect(isOrderComplete(null as unknown as OrderItem[])).toBe(false);
    expect(isOrderComplete(undefined as unknown as OrderItem[])).toBe(false);
  });

  it("returns false when any item is still pending", () => {
    expect(
      isOrderComplete([
        item({ id: "a", item_status: "delivered" }),
        item({ id: "b", item_status: "pending" }),
      ])
    ).toBe(false);
  });

  it("returns false when items are mid-flow (collected, ready_delivery, etc.)", () => {
    expect(
      isOrderComplete([
        item({ id: "a", item_status: "delivered" }),
        item({ id: "b", item_status: "ready_delivery" }),
      ])
    ).toBe(false);
  });

  it("returns false when an item is cancelled — even if the rest are delivered", () => {
    expect(
      isOrderComplete([
        item({ id: "a", item_status: "delivered" }),
        item({ id: "b", item_status: "cancelled" }),
      ])
    ).toBe(false);
  });

  it("returns true when every item is delivered", () => {
    expect(
      isOrderComplete([
        item({ id: "a", item_status: "delivered" }),
        item({ id: "b", item_status: "delivered" }),
      ])
    ).toBe(true);
  });

  it("returns true for a single delivered item", () => {
    expect(isOrderComplete([item({ item_status: "delivered" })])).toBe(true);
  });
});