import type { Args, Fn } from "../HKT";

export type ToCamelCase<S extends string> =
  _ToCamelCase<S> extends `${infer T}${infer U}` ? `${Uncapitalize<T>}${_ToCamelCase<U>}` : S;
type _ToCamelCase<S extends string> =
  S extends `${infer T}${"_" | "-"}${infer U}` ? `${Capitalize<T>}${_ToCamelCase<Capitalize<U>>}`
  : S;

export default interface ToCamelCaseFn extends Fn<[string], string> {
  def: ([s]: Args<this>) => ToCamelCase<typeof s>;
}