"use strict";

const test = require("node:test");
const assert = require("node:assert/strict");
const { FixedWindowRateLimiter } = require("../src/lib/rate-limit");

test("allows requests within window limit", () => {
  const limiter = new FixedWindowRateLimiter({ limit: 2, windowMs: 1000 });

  const first = limiter.hit("u1", 0);
  const second = limiter.hit("u1", 1);

  assert.equal(first.allowed, true);
  assert.equal(second.allowed, true);
  assert.equal(second.remaining, 0);
});

test("blocks request over the limit and reports retry delay", () => {
  const limiter = new FixedWindowRateLimiter({ limit: 1, windowMs: 1000 });

  limiter.hit("u1", 0);
  const blocked = limiter.hit("u1", 100);

  assert.equal(blocked.allowed, false);
  assert.equal(blocked.retryAfterSec > 0, true);
});

test("resets after window passes", () => {
  const limiter = new FixedWindowRateLimiter({ limit: 1, windowMs: 1000 });

  limiter.hit("u1", 0);
  const blocked = limiter.hit("u1", 500);
  const afterWindow = limiter.hit("u1", 1001);

  assert.equal(blocked.allowed, false);
  assert.equal(afterWindow.allowed, true);
});