import { describe, expect, it } from 'vitest'
import { avatarColors, avatarHue, initials } from '../src/avatar'

describe('initials', () => {
  it('takes the first letter of the first two words', () => {
    expect(initials('Acme UK Compliance Group')).toBe('AU')
    expect(initials('hamiltel')).toBe('H')
  })
  it('falls back to ? for empty input', () => {
    expect(initials('')).toBe('?')
    expect(initials('   ')).toBe('?')
  })
})

describe('avatarHue', () => {
  it('is deterministic', () => {
    expect(avatarHue('Hamiltel')).toBe(avatarHue('Hamiltel'))
  })
  it('stays in [0, 360)', () => {
    for (const n of ['a', 'Acme', 'Zed Systems', '৪২']) {
      const h = avatarHue(n)
      expect(h).toBeGreaterThanOrEqual(0)
      expect(h).toBeLessThan(360)
    }
  })
})

describe('avatarColors', () => {
  it('returns hsl strings derived from the hue', () => {
    const { bg, fg } = avatarColors('Hamiltel')
    const h = avatarHue('Hamiltel')
    expect(bg).toContain(`hsl(${h}`)
    expect(fg).toContain(`hsl(${h}`)
  })
})