export const formatDate = (
  date: Date | string,
  options?: Intl.DateTimeFormatOptions
): string => {
  const dateObj = typeof date === "string" ? new Date(date) : date;

  const defaultOptions: Intl.DateTimeFormatOptions = {
    year: "numeric",
    month: "long",
    day: "numeric",
  };

  return dateObj.toLocaleDateString("ko-KR", { ...defaultOptions, ...options });
};

export const formatRelativeTime = (date: Date | string): string => {
  const dateObj = typeof date === "string" ? new Date(date) : date;
  const now = new Date();
  const diffInSeconds = Math.floor((now.getTime() - dateObj.getTime()) / 1000);

  if (diffInSeconds < 60) {
    return "방금 전";
  }

  const diffInMinutes = Math.floor(diffInSeconds / 60);
  if (diffInMinutes < 60) {
    return `${diffInMinutes}분 전`;
  }

  const diffInHours = Math.floor(diffInMinutes / 60);
  if (diffInHours < 24) {
    return `${diffInHours}시간 전`;
  }

  const diffInDays = Math.floor(diffInHours / 24);
  if (diffInDays < 7) {
    return `${diffInDays}일 전`;
  }

  return formatDate(dateObj);
};