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// Copyright (c) 2020 Jozty. All rights reserved. MIT license.
import curryN from './utils/curry_n.ts';import type { PH } from './utils/types.ts';
// @typestype Insert_1<T> = (index: number) => T[];
type Insert_2<T> = (element: T) => T[];
type Insert_3<T> = (list: T[]) => T[];
type Insert_2_3 =  & (<T>(element: T) => Insert_3<T>)  & (<T>(element: PH, list: T[]) => Insert_2<T>)  & (<T>(element: T, list: T[]) => T[]);
type Insert_1_3<T> =  & ((index: number) => Insert_3<T>)  & (<T>(index: PH, list: T[]) => Insert_1<T>)  & ((index: number, list: T[]) => T[]);
type Insert_1_2<T> =  & ((index: number) => Insert_2<T>)  & ((index: PH, element: T) => Insert_1<T>)  & ((index: number, element: T) => T[]);
type Insert =  & ((index: number) => Insert_2_3)  & (<T>(index: PH, element: T) => Insert_1_3<T>)  & (<T>(index: PH, element: PH, list: T[]) => Insert_1_2<T>)  & (<T>(index: number, element: T) => Insert_3<T>)  & (<T>(index: number, element: PH, list: T[]) => Insert_2<T>)  & (<T>(index: PH, element: T, list: T[]) => Insert_1<T>)  & (<T>(index: number, element: T, list: T[]) => T[]);
function _insert<T>(index: number, element: T, list: T[]) {  index = index < list.length && index >= 0 ? index : list.length;  const result = [...list];  result.splice(index, 0, element);  return result;}
/** * Returns a new array with `element` inserted at `index` to `list` * without affecting original one. */export const insert: Insert = curryN(3, _insert);