"use strict";

const test = require("node:test");
const assert = require("node:assert/strict");
const {
  buildAlertRules,
  inferAlertOn,
  normalizeAlertOn,
  parseTargetPrice,
} = require("../src/alertRules");

test("buildAlertRules builds both mode with integer target", () => {
  const result = buildAlertRules({
    targetPrice: "1200000",
    alertOn: "both",
  });

  assert.deepEqual(result, {
    targetPrice: 1200000,
    notifyOnPriceChange: true,
    notifyOnFirstResult: false,
  });
});

test("buildAlertRules validates threshold mode target", () => {
  assert.throws(
    () =>
      buildAlertRules({
        targetPrice: null,
        alertOn: "threshold",
      }),
    (error) => error.message.includes("targetPrice가 필요합니다.")
  );
});

test("normalizeAlertOn validates allowed modes", () => {
  assert.equal(normalizeAlertOn(" change "), "change");
  assert.throws(() => normalizeAlertOn("invalid"), (error) => error.statusCode === 400);
});

test("parseTargetPrice handles undefined and allowUndefined option", () => {
  assert.equal(parseTargetPrice(undefined), null);
  assert.equal(parseTargetPrice(undefined, { allowUndefined: true }), undefined);
});

test("inferAlertOn reflects rule combinations", () => {
  assert.equal(inferAlertOn({ targetPrice: 1000, notifyOnPriceChange: true }), "both");
  assert.equal(inferAlertOn({ targetPrice: 1000, notifyOnPriceChange: false }), "threshold");
  assert.equal(inferAlertOn({ targetPrice: null, notifyOnPriceChange: true }), "change");
});