import { Extends } from '../../commonness/Extends';
import { If } from '../../commonness/If';
/**
 *
 * Replace the type of specified keys in an object
 *
 * 객체에서 지정된 키의 타입을 변경
 *
 * @param U Object / 객체
 *
 * @param T Keys to replace / 변경할 키
 *
 * @param Y New types for keys / 키의 새로운 타입
 *
 * @returns Object with replaced key types / 키 타입이 변경된 객체
 *
 * @example
 * type NodeA = {
 *   type: 'A';
 *   name: string;
 *   flag: number;
 * };
 *
 * type ReplacedNodeA = {
 *   type: 'A';
 *   name: number;
 *   flag: string;
 * };
 *
 * type cases = [
 *   Expect<Equal<ReplaceKeys<NodeA, 'name' | 'flag', {name: number; flag: string}>, ReplacedNodeA>>
 * ];
 *
 * @link https://www.utilscript.site/docs/usage-object/replace-keys
 *
 */
export type ReplaceKeys<U, T extends PropertyKey, Y extends Record<PropertyKey, any>> = {
    [P in keyof U]: If<Extends<P, T>, P extends keyof Y ? Y[P] : never, U[P]>;
};