import dayjs from 'dayjs';

/** 相对时间展示：刚刚 / N 分钟前 / N 小时前 / N 天前，超过 7 天回退完整日期 */
export function formatRelativeTime(value: string | number) {
  const time = dayjs(value);
  if (!time.isValid()) return '';

  const now = dayjs();
  const diffMinutes = now.diff(time, 'minute');
  if (diffMinutes < 1) return '刚刚';
  if (diffMinutes < 60) return `${diffMinutes} 分钟前`;

  const diffHours = now.diff(time, 'hour');
  if (diffHours < 24) return `${diffHours} 小时前`;

  const diffDays = now.diff(time, 'day');
  if (diffDays < 7) return `${diffDays} 天前`;

  return time.format('YYYY-MM-DD HH:mm');
}

/** 绝对时间展示：YYYY-MM-DD HH:mm；空值或非法值回空串 */
export function formatDateTime(value: string | number | null | undefined) {
  if (value === null || value === undefined || value === '') return '';
  const time = dayjs(value);
  return time.isValid() ? time.format('YYYY-MM-DD HH:mm') : '';
}