import test from "node:test";
import assert from "node:assert/strict";

import { normalizePriceToUsd } from "../src/price-normalization.js";

test("normalizePriceToUsd passes through USD values", () => {
  const result = normalizePriceToUsd({
    amount: 2847,
    currency: "USD"
  });

  assert.equal(result.amountUsd, 2847);
  assert.equal(result.currency, "USD");
});

test("normalizePriceToUsd converts foreign currencies when a rate is supplied", () => {
  const result = normalizePriceToUsd({
    amount: 100,
    currency: "EUR",
    exchangeRates: {
      EUR: 1.08
    }
  });

  assert.equal(result.amountUsd, 108);
  assert.match(result.notes.join(" "), /EUR/i);
});

test("normalizePriceToUsd rejects missing exchange rates", () => {
  assert.throws(
    () =>
      normalizePriceToUsd({
        amount: 100,
        currency: "EUR"
      }),
    /exchange rate/i
  );
});