import { AnyFunction } from "./global.js";

//#region src/types/function.d.ts
/**
 * 获取函数的参数类型
 * @public
 */
type ParameterType<Func extends AnyFunction> = Func extends ((...args: infer Args) => unknown) ? Args : never;
/**
 * 获取函数this的类型
 * @public
 */
type ThisParameterType<Func> = Func extends ((this: infer ThisType, ...args: unknown[]) => unknown) ? ThisType : unknown;
/**
 * 给函数添加参数
 * @template Func - 原函数类型
 * @template Arg - 要添加的参数类型
 * @example
 * ```ts
 * type Fn = (a: string) => number
 * type NewFn = AppendArgument<Fn, boolean> // (a: string, b: boolean) => number
 * ```
 * @public
 */
type AppendArgument<Func extends AnyFunction, Arg> = Func extends ((...args: infer Args) => infer ReturnType) ? (...args: [...Args, Arg]) => ReturnType : never;
/**
 * @public
 */
type PromiseFunction<Args extends any[] = any[], R = any> = (...args: Args) => Promise<R>;
/**
 * 获取Promise函数的返回值类型
 * @public
 */
type PromiseReturnType<Func extends PromiseFunction> = Func extends ((...args: any) => Promise<infer R>) ? R : never;
/**
 * 获取Promise函数的参数类型
 * @public
 */
type PromiseParameterType<Func extends PromiseFunction> = Func extends ((...args: infer Args) => Promise<any>) ? Args : never;
//#endregion
export { AppendArgument, ParameterType, PromiseFunction, PromiseParameterType, PromiseReturnType, ThisParameterType };