import { describe, expect, it } from 'vitest';
import { createRateLimiter } from '../src/rate-limit.js';

describe('rate limiter', () => {
  it('enforces request and spend windows', () => {
    let time = 0;
    const limiter = createRateLimiter({ now: () => time });
    expect(limiter.check('ip').allowed).toBe(true);
    expect(limiter.check('ip').allowed).toBe(true);
    expect(limiter.check('ip').allowed).toBe(false);
    time = 1_001;
    expect(limiter.check('ip').allowed).toBe(true);
    limiter.recordCost('ip', 10);
    expect(limiter.check('ip').allowed).toBe(false);
    time = 5 * 60 * 60 * 1_000 + 1_002;
    expect(limiter.check('ip').allowed).toBe(true);
  });

  it('keeps clients independent', () => {
    const limiter = createRateLimiter();
    expect(limiter.check('a').allowed).toBe(true);
    expect(limiter.check('a').allowed).toBe(true);
    expect(limiter.check('a').allowed).toBe(false);
    expect(limiter.check('b').allowed).toBe(true);
  });
});