import { isArray, isObject, mapKeys, mapValues, snakeCase } from 'lodash'

type ObjType = Record<string, unknown> | unknown[] | unknown

export function deepSnakeCaseKeys<T extends ObjType>(obj: T): T {
  if (isArray(obj)) {
    return obj.map(deepSnakeCaseKeys) as T
  } else if (isObject(obj)) {
    return mapValues(
      // @ts-ignore This mutates the object, but we don't care about the type here
      mapKeys(obj, (_value: string, key: string) => snakeCase(key)),
      deepSnakeCaseKeys
    ) as T
  }
  return obj
}