/**
 * Player-name normalization for cross-source matching.
 *
 * ParlayAPI emits "Brunson, Jalen"; ESPN emits "Jalen Brunson"; nba_api
 * sometimes attaches a jersey number. Normalize aggressively so equality
 * comparisons just work.
 *
 * Pipeline:
 *   NFD unicode → strip accents → lowercase → drop suffixes (jr/sr/ii/iii/
 *   iv/v) → strip punctuation → collapse whitespace → trim.
 *
 * `keepDigits` (default false) controls whether digits survive the
 * punctuation strip. The trap detector matches names only and wants
 * digits gone; the player-ID population script keeps them because some
 * legacy roster fields encode jersey numbers inline.
 */
function normalizeName(name, { keepDigits = false } = {}) {
  if (!name) return '';
  const punctClass = keepDigits ? '[^a-z0-9\\s]' : '[^a-z\\s]';
  return String(name)
    .normalize('NFD')
    .replace(/[̀-ͯ]/g, '')
    .toLowerCase()
    .replace(/\b(jr|sr|ii|iii|iv|v)\.?\b/g, '')
    .replace(new RegExp(punctClass, 'g'), ' ')
    .replace(/\s+/g, ' ')
    .trim();
}

module.exports = { normalizeName };