const formatters = new Map<string, Intl.DateTimeFormat>();

const getFormatter = (format: Intl.DateTimeFormatOptions): Intl.DateTimeFormat => {
  const key = JSON.stringify(format);
  let formatter = formatters.get(key);
  if (!formatter) {
    formatter = new Intl.DateTimeFormat(undefined, format);
    formatters.set(key, formatter);
  }
  return formatter;
};

const formatDate = (
  originalDate: string | Date | undefined,
  format: Intl.DateTimeFormatOptions = {
    day: "2-digit",
    month: "2-digit",
    year: "2-digit",
  }
): string => {
  if (!originalDate) return "";
  const date =
    typeof originalDate === "string" ? new Date(originalDate) : originalDate;
  const formatter = getFormatter(format);
  const formattedDate = formatter.format(date);
  if (typeof originalDate === "string" && formattedDate === "Invalid Date")
    return originalDate;
  return formattedDate;
};

export default formatDate;