/**
 * Converts camelCase or snake_case keys of an object to snake_case recursively.
 */
export function camelOrSnakeToSnakeCase<
  T extends Record<string, any> | undefined,
>(providerData: T | undefined): Record<string, any> | undefined {
  if (
    !providerData ||
    typeof providerData !== 'object' ||
    Array.isArray(providerData)
  ) {
    return providerData;
  }

  const result: Record<string, any> = {};
  for (const [key, value] of Object.entries(providerData)) {
    const snakeKey = key.replace(/([A-Z])/g, '_$1').toLowerCase();
    result[snakeKey] = camelOrSnakeToSnakeCase(value);
  }
  return result;
}