// Pure helpers for the public landing page (Stage 17), kept out of the Svelte component so
// the per-language Telegram-bot link selection is unit-testable.

import type { Locale } from './i18n/index.svelte';

/**
 * telegramBotLink returns the t.me link for the locale's game bot, or null when it is not
 * configured. The two links are build-time vars (VITE_TELEGRAM_LINK_EN / VITE_TELEGRAM_LINK_RU)
 * because the test and prod contours run different bots (different usernames), so the link
 * cannot be hardcoded.
 */
export function telegramBotLink(locale: Locale): string | null {
  const raw = locale === 'ru' ? import.meta.env.VITE_TELEGRAM_LINK_RU : import.meta.env.VITE_TELEGRAM_LINK_EN;
  const link = (raw as string | undefined)?.trim();
  return link ? link : null;
}