import { constructFrom } from "./constructFrom.mjs";

/**
 * @name constructNow
 * @category Generic Helpers
 * @summary Constructs a new current date using the passed value constructor.
 * @pure false
 *
 * @description
 * The function constructs a new current date using the constructor from
 * the reference date. It helps to build generic functions that accept date
 * extensions and use the current date.
 *
 * It defaults to `Date` if the passed reference date is a number or a string.
 *
 * @typeParam DateType - The `Date` type, the function operates on. Gets inferred from passed arguments. Allows to use extensions like [`UTCDate`](https://github.com/date-fns/utc).
 *
 * @param date - The reference date to take constructor from
 *
 * @returns Current date initialized using the given date constructor
 *
 * @example
 * import { constructNow, isSameDay } from 'date-fns'
 *
 * function isToday<DateType extends Date>(
 *   date: DateType | number | string,
 * ): boolean {
 *   // If we were to use `new Date()` directly, the function would  behave
 *   // differently in different timezones and return false for the same date.
 *   return isSameDay(date, constructNow(date));
 * }
 */
export function constructNow(date) {
  return constructFrom(date, Date.now());
}

// Fallback for modularized imports:
export default constructNow;