/**
 * @example
 * numberFormat(1234);
 * // Returns '1,234'
 *
 * @example
 * numberFormat(1234, "usd");
 * // Returns '$1,234.00'
 */
export default function numberFormat(
  input: number | bigint | string,
  locales: string | string[] | undefined = "en-us",
  options: Intl.NumberFormatOptions | undefined = undefined
) {
  let number: number | bigint;

  if (typeof input === "string") {
    number = parseFloat(input);
  } else {
    number = input;
  }

  if (locales === "usd" && options === undefined) {
    locales = "en-us";

    options = {
      style: "currency",
      currency: "USD",
    };
  }

  return new Intl.NumberFormat(locales, options).format(number);
}