const LANG3_FULL = {
  eng: 'english', 
  arb: 'arabic', 
  asm: 'assamese', 
  bel: 'belarusian', 
  bul: 'bulgarian', 
  ben: 'bengali', 
  cat: 'catalan', 
  ces: 'czech', 
  cym: 'welsh', 
  dan: 'danish', 
  deu: 'german', 
  ell: 'greek', 
  spa: 'spanish', 
  est: 'estonian', 
  pes: 'persian', 
  fin: 'finnish', 
  fra: 'french', 
  hin: 'hindi', 
  hun: 'hungarian', 
  ind: 'indonesian', 
  ita: 'italian', 
  jpn: 'japanese', 
  kat: 'georgian', 
  lit: 'lithuanian', 
  lvs: 'latvian', 
  khk: 'mongolian', 
  mar: 'marathi', 
  mlt: 'maltese', 
  nld: 'dutch', 
  pan: 'punjabi', 
  pol: 'polish', 
  por: 'portuguese', 
  ron: 'romanian', 
  rus: 'russian', 
  slk: 'slovak', 
  slv: 'slovenian', 
  swe: 'swedish', 
  swh: 'swahili', 
  tam: 'tamil', 
  tha: 'thai', 
  tur: 'turkish', 
  ukr: 'ukrainian', 
  urd: 'urdu', 
  uzn: 'uzbek', 
  vie: 'vietnamese', 
  cmn: 'chinese', 
  afr: 'afrikaans', 
  isl: 'icelandic', 
  ltz: 'luxembourgish', 
  nob: 'norwegian', 
  glg: 'galician', 
  bos: 'bosnian', 
  hrv: 'croatian', 
  mkd: 'macedonian', 
  srp: 'serbian', 
  hye: 'armenian', 
  azj: 'azerbaijani', 
  kaz: 'kazakh', 
  kor: 'korean', 
  guj: 'gujarati', 
  kan: 'kannada', 
  npi: 'nepali', 
  snd: 'sindhi', 
  tel: 'telugu', 
  jav: 'javanese', 
  zlm: 'malay', 
  mal: 'malayalam', 
  tgl: 'tagalog', 
  mya: 'myanmar', 
  khm: 'khmer', 
  lao: 'lao', 
  heb: 'hebrew', 
  pbt: 'pashto', 
  tgk: 'tajik', 
  amh: 'amharic', 
  lin: 'lingala', 
  som: 'somali', 
  yor: 'yoruba', 
  sna: 'shona', 
  mri: 'maori', 
  hau: 'hausa', 
  oci: 'occitan', 
  bak: 'bashkir', 
  bre: 'breton', 
  yid: 'yiddish', 
  hat: 'haitian creole', 
  mlg: 'malagasy', 
  sin: 'sinhala', 
  sqi: 'albanian', 
  sun: 'sundanese', 
  eus: 'basque', 
  nno: 'nynorsk', 
  tat: 'tatar', 
  bod: 'tibetan', 
  fao: 'faroese', 
  haw: 'hawaiian', 
  lat: 'latin', 
  san: 'sanskrit', 
  tuk: 'turkmen'
};

export function getLanguageFromThreeLetterCode(code: string): string | null {
  try {
    const name = LANG3_FULL[code] ?? null;
    if (name == null) {
      return null;
    }
    const capitalizedWords = name
      .split(' ')
      .map((word: string) => word[0].toUpperCase() + word.slice(1));
    return capitalizedWords.join(' ');
  } catch (e) {
    console.warn(`Unable to get language name for code ${code}: ${e}`);
  }
  return null;
}