import { describe, it, expect } from 'vitest';
import abbreviateNumber from '@/module/abbreviateNumber.js';

describe('abbreviateNumber', () => {
  it('returns "0" for 0 seconds', () => {
    expect(abbreviateNumber(0)).toBe('0');
  });

  it('returns seconds only when < 60', () => {
    expect(abbreviateNumber(45).trim()).toBe('45s');
  });

  it('returns minutes and seconds', () => {
    // 2m 30s = 150s
    expect(abbreviateNumber(150).trim()).toBe('2m 30s');
  });

  it('returns hours, minutes, and seconds', () => {
    // 1h 1m 1s = 3661s
    expect(abbreviateNumber(3661).trim()).toBe('1h 1m 1s');
  });

  it('returns days, hours, minutes, and seconds', () => {
    // 1d 2h 3m 4s = 93784s
    expect(abbreviateNumber(93784).trim())
      .toBe('1d 2h 3m 4s');
  });

  it('handles exact day boundary', () => {
    // 1d = 86400s
    expect(abbreviateNumber(86400).trim()).toBe('1d');
  });

  it('handles exact hour boundary', () => {
    // 1h = 3600s
    expect(abbreviateNumber(3600).trim()).toBe('1h');
  });

  it('handles string input by parsing as int', () => {
    expect(abbreviateNumber('150').trim()).toBe('2m 30s');
  });

  it('handles NaN input', () => {
    expect(abbreviateNumber('abc').trim()).toBe('');
  });

  it('does not have trailing whitespace', () => {
    expect(abbreviateNumber(45)).toBe('45s');
    expect(abbreviateNumber(3661)).toBe('1h 1m 1s');
  });
});