import assert from "node:assert/strict";
import { readFileSync } from "node:fs";
import test from "node:test";
import { preserveShallowEqual } from "../src/lib/preserve-shallow-equal.ts";

const pageSource = readFileSync(new URL("../src/app/page.tsx", import.meta.url), "utf8");

test("preserves the current profile reference when refreshed values are unchanged", () => {
  const current = {
    name: "测试用户",
    date: "2000-01-01",
    time: "",
    birthTimeSource: "period_only",
    birthTimePeriod: "evening",
    timezoneId: "Asia/Shanghai",
    latitude: 31.23,
    longitude: 121.47,
    timezoneOffset: null,
  };
  const refreshed = { ...current };

  assert.notEqual(refreshed, current);
  assert.equal(preserveShallowEqual(current, refreshed), current);
});

test("uses the refreshed profile reference when a value changed", () => {
  const current = {
    name: "测试用户",
    birthTimePeriod: "evening",
    timezoneId: "Asia/Shanghai",
  };
  const refreshed = {
    ...current,
    birthTimePeriod: "morning",
  };

  assert.equal(preserveShallowEqual(current, refreshed), refreshed);
});

test("account refresh preserves an equivalent normalized profile instead of replacing it", () => {
  const refreshAccountStart = pageSource.indexOf("async function refreshAccount()");
  const refreshAccountSource = pageSource.slice(
    refreshAccountStart,
    pageSource.indexOf("function updateSession", refreshAccountStart),
  );

  assert.match(
    refreshAccountSource,
    /setProfile\(\(current\) => preserveShallowEqual\(current, nextProfile\)\)/,
  );
  assert.doesNotMatch(refreshAccountSource, /setProfile\(nextProfile\)/);
});