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

/**
 * Split a string by a separator.
 *
 * Sig: `(sep: string, s: string) => List<string>`
 */
export type Split<Sep extends string, S extends string> =
  S extends `${infer Head}${Sep}${infer Tail}` ? [Head, ...Split<Sep, Tail>] : [S];

/**
 * [Fn] Split a string by a separator.
 *
 * Sig: `(sep: string, s: string) => List<string>`
 */
export default interface SplitFn extends Fn<[string, string], List<string>> {
  def: ([sep, s]: Args<this>) => Split<typeof sep, typeof s>;
}