import { describe, expect, it } from 'vitest';

import { addSeconds, isIsoDateString, nowIso, toIsoString } from './time.js';

describe('time utils', () => {
  it('nowIso 返回 UTC ISO 字符串', () => {
    expect(isIsoDateString(nowIso())).toBe(true);
  });

  it('toIsoString 支持 Date / 时间戳 / 字符串', () => {
    const date = new Date('2026-11-02T08:00:00.000Z');
    expect(toIsoString(date)).toBe('2026-11-02T08:00:00.000Z');
    expect(toIsoString(date.getTime())).toBe('2026-11-02T08:00:00.000Z');
    expect(toIsoString('2026-11-02T08:00:00.000Z')).toBe('2026-11-02T08:00:00.000Z');
  });

  it('非法时间抛错', () => {
    expect(() => toIsoString('not-a-date')).toThrow(TypeError);
  });

  it('addSeconds 不修改原对象', () => {
    const date = new Date('2026-11-02T08:00:00.000Z');
    expect(addSeconds(date, 90).toISOString()).toBe('2026-11-02T08:01:30.000Z');
    expect(date.toISOString()).toBe('2026-11-02T08:00:00.000Z');
  });

  it('isIsoDateString 拒绝非 UTC 格式', () => {
    expect(isIsoDateString('2026-11-02T08:00:00+08:00')).toBe(false);
    expect(isIsoDateString('2026-13-02T08:00:00.000Z')).toBe(false);
  });
});