import { describe, it, expect } from 'vitest';
import { avatarPalette, initials } from './avatar';

describe('avatarPalette', () => {
  it('returns the neutral palette for empty / nullish names', () => {
    expect(avatarPalette(null)).toContain('bg-gray-100');
    expect(avatarPalette(undefined)).toContain('bg-gray-100');
    expect(avatarPalette('')).toContain('bg-gray-100');
  });

  it('is deterministic for the same name', () => {
    expect(avatarPalette('Alice')).toBe(avatarPalette('Alice'));
  });

  it('returns a real palette entry (not neutral) for a non-empty name', () => {
    expect(avatarPalette('Bob')).toMatch(/bg-(blue|purple|green|amber|rose|teal)-100/);
  });
});

describe('initials', () => {
  it('returns "?" for empty / nullish / whitespace-only names', () => {
    expect(initials(null)).toBe('?');
    expect(initials(undefined)).toBe('?');
    expect(initials('')).toBe('?');
    expect(initials('   ')).toBe('?');
  });

  it('uses the first letter (uppercased) for a single word', () => {
    expect(initials('alice')).toBe('A');
  });

  it('uses the first letters of the first two words', () => {
    expect(initials('Alice Bob Carol')).toBe('AB');
  });

  it('collapses runs of whitespace between words', () => {
    expect(initials('  john   doe ')).toBe('JD');
  });
});