/**
 * Validation helpers for StoreHealthAnalyzer
 */

/**
 * Extract and validate a store number from user input.
 * Looks for the first sequence of 1-10 digits.
 * Returns a normalized string (no leading zeros issues) or null.
 *
 * @param {string} text
 * @returns {string|null}
 */
function parseStoreNumber(text) {
  if (!text || typeof text !== 'string') return null;

  // Match 1-10 digits not preceded by minus sign
  const match = text.trim().match(/(?<!-)\b(\d{1,10})\b/);
  if (!match) return null;

  const num = parseInt(match[1], 10);
  if (!num || num <= 0) return null;

  return String(num);
}

module.exports = {
  parseStoreNumber,
};