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

import { DEFAULT_LOCALE, localeFromUrl, resolveLocale } from './api';

describe('resolveLocale', () => {
  it('accepts the locales the API declares', () => {
    expect(resolveLocale('ca')).toBe('ca');
    expect(resolveLocale('en')).toBe('en');
  });

  it('falls back to the application default for anything else', () => {
    expect(resolveLocale('fr')).toBe(DEFAULT_LOCALE);
    expect(resolveLocale(undefined)).toBe(DEFAULT_LOCALE);
    expect(resolveLocale(42)).toBe(DEFAULT_LOCALE);
  });
});

describe('localeFromUrl', () => {
  it('reads ?lang from a path-only URL', () => {
    expect(localeFromUrl('/api/_analog/pages/-home-?lang=ca')).toBe('ca');
  });

  it('ignores an unsupported language rather than passing it on', () => {
    expect(localeFromUrl('/?lang=de')).toBe(DEFAULT_LOCALE);
  });

  it('survives a missing URL', () => {
    expect(localeFromUrl(undefined)).toBe(DEFAULT_LOCALE);
  });
});