function interpolateConciergeGreeting(template, values = {}) {
  const greeting = String(template || '').trim();
  if (!greeting) {
    const profileName = values.profileName || 'Guest';
    const eventName = values.eventName ? ` for ${values.eventName}` : '';
    return `Hello ${profileName}${eventName}! How can I help you today?`;
  }

  return greeting.replace(/{{\s*(\w+)\s*}}/g, (_, key) => {
    if (Object.prototype.hasOwnProperty.call(values, key)) {
      return String(values[key] ?? '');
    }
    return '';
  });
}

module.exports = {
  interpolateConciergeGreeting,
};