import { describe, it, expect } from 'vitest';
import { formatTime, parseTime } from '$lib/utils/time';

describe('formatTime', () => {
  it('formats zero seconds', () => {
    expect(formatTime(0)).toBe('00:00.000');
  });

  it('formats seconds with milliseconds', () => {
    expect(formatTime(83.45)).toBe('01:23.450');
  });

  it('formats hours', () => {
    expect(formatTime(3661.5)).toBe('1:01:01.500');
  });

  it('formats exact minutes', () => {
    expect(formatTime(120)).toBe('02:00.000');
  });

  it('handles large values', () => {
    expect(formatTime(7384.123)).toBe('2:03:04.123');
  });
});

describe('parseTime', () => {
  it('parses mm:ss.mmm format', () => {
    expect(parseTime('01:23.450')).toBeCloseTo(83.45);
  });

  it('parses h:mm:ss.mmm format', () => {
    expect(parseTime('1:01:01.500')).toBeCloseTo(3661.5);
  });

  it('returns null for invalid input', () => {
    expect(parseTime('not a time')).toBeNull();
  });

  it('parses mm:ss without milliseconds', () => {
    expect(parseTime('02:00')).toBeCloseTo(120);
  });
});