import { afterEach, describe, expect, it, vi } from 'vitest';
import { telegramChannelLink } from './landing';

describe('telegramChannelLink', () => {
  afterEach(() => vi.unstubAllEnvs());

  it('builds the per-language t.me link from the channel name', () => {
    vi.stubEnv('VITE_TELEGRAM_GAME_CHANNEL_NAME_EN', 'Scrabble_Game');
    vi.stubEnv('VITE_TELEGRAM_GAME_CHANNEL_NAME_RU', '@Erudit_Game'); // a leading @ is tolerated
    expect(telegramChannelLink('en')).toBe('https://t.me/Scrabble_Game');
    expect(telegramChannelLink('ru')).toBe('https://t.me/Erudit_Game');
  });

  it('returns null when the locale channel is unset or blank', () => {
    vi.stubEnv('VITE_TELEGRAM_GAME_CHANNEL_NAME_EN', '');
    vi.stubEnv('VITE_TELEGRAM_GAME_CHANNEL_NAME_RU', '   ');
    expect(telegramChannelLink('en')).toBeNull();
    expect(telegramChannelLink('ru')).toBeNull();
  });
});