import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
import moment from 'moment';
import { formatTimestamp, formatDate } from '@/utils/time';

describe('time utils', () => {
  const fixed = 1700000000000; // fixed ms timestamp

  beforeEach(() => {
    vi.useFakeTimers();
    vi.setSystemTime(fixed);
  });

  afterEach(() => {
    vi.useRealTimers();
  });

  it('formatTimestamp: Just now for <1m', () => {
    expect(formatTimestamp(fixed - 10 * 1000)).toBe('Just now');
  });

  it('formatTimestamp: minutes for <60m', () => {
    expect(formatTimestamp(fixed - 23 * 60 * 1000)).toBe('23m');
  });

  it('formatTimestamp: hours for <24h', () => {
    expect(formatTimestamp(fixed - 3 * 60 * 60 * 1000)).toBe('3h');
  });

  it('formatTimestamp: MMM D for >=24h', () => {
    const s = formatTimestamp(fixed - 3 * 24 * 60 * 60 * 1000);
    expect(s).toMatch(/^[A-Z][a-z]{2} \d{1,2}$/);
  });

  it('formatDate: relative time', () => {
    const ts = fixed - 2 * 60 * 60 * 1000;
    // moment.fromNow() value depends on locale; check contains 'ago'
    const out = formatDate(ts);
    expect(typeof out).toBe('string');
  });
});