// @ts-ignore - Only used in doc comments
import type { List } from ".";
import type { Args, GenericFn, GenericResolver } from "..";
// @ts-ignore - Only used in doc comments
import type { Of1 } from "../Tuple/Of1";
// @ts-ignore - Only used in doc comments
import type Of1Fn from "../Tuple/Of1";
import type { Broaden } from "../helpers";

/**
 * Create a {@link List} with one element.
 *
 * Sig: `<T>(x: T) => List<T>`
 *
 * @example
 * ```typescript
 * type R1 = Create<1>;
 * //   ^?: readonly [1]
 * type R2 = Create<"foo" | false>;
 * //   ^?: readonly ["foo" | false]
 * ```
 *
 * @see {@link Of1} if you want a version with more precise function signature.
 */
export type Create<T> = readonly [T];

interface Resolver extends GenericResolver<[unknown], List<unknown>> {
  on1: ([x]: Args<this>) => [[], List<Broaden<typeof x>>];
}

/**
 * [Fn] Create a {@link List} with one element.
 *
 * Sig: `<T>(x: T) => List<T>`
 *
 * @see {@link Of1Fn} if you want a version with more precise function signature.
 */
export default interface CreateFn extends GenericFn<Resolver> {
  def: ([x]: Args<this>) => Create<typeof x>;
}