/**
 * Date Utils
 *
 * 日期时间工具函数
 */

/**
 * 格式化日期
 */
export function formatDate(date: string | Date): string {
  const d = typeof date === 'string' ? new Date(date) : date;
  const year = d.getFullYear();
  const month = String(d.getMonth() + 1).padStart(2, '0');
  const day = String(d.getDate()).padStart(2, '0');
  return `${year}-${month}-${day}`;
}

/**
 * 格式化日期时间
 */
export function formatDateTime(date: string | Date): string {
  const d = typeof date === 'string' ? new Date(date) : date;
  const dateStr = formatDate(d);
  const hours = String(d.getHours()).padStart(2, '0');
  const minutes = String(d.getMinutes()).padStart(2, '0');
  const seconds = String(d.getSeconds()).padStart(2, '0');
  return `${dateStr} ${hours}:${minutes}:${seconds}`;
}

/**
 * 格式化相对时间
 */
export function formatRelativeTime(date: string | Date): string {
  const d = typeof date === 'string' ? new Date(date) : date;
  const now = new Date();
  const diff = now.getTime() - d.getTime();

  const seconds = Math.floor(diff / 1000);
  const minutes = Math.floor(seconds / 60);
  const hours = Math.floor(minutes / 60);
  const days = Math.floor(hours / 24);

  if (days > 7) {
    return formatDate(d);
  } else if (days > 0) {
    return `${days}天前`;
  } else if (hours > 0) {
    return `${hours}小时前`;
  } else if (minutes > 0) {
    return `${minutes}分钟前`;
  } else {
    return '刚刚';
  }
}