import { isFunction } from '@/assertion';

export type ValueFunction<TValue, TArg> = (arg: TArg) => TValue;
export type ValueOrFunction<TValue, TArg> = TValue | ValueFunction<TValue, TArg>;

export const resolveValue = <TValue, TArg>(
  valOrFunction: ValueOrFunction<TValue, TArg>,
  arg: TArg,
): TValue => (isFunction(valOrFunction) ? valOrFunction(arg) : valOrFunction);