// 公共工具函数
const TIMEZONE = 'Asia/Shanghai';

function timestamp() {
  return new Date().toLocaleString('zh-CN', { timeZone: TIMEZONE, hour12: false });
}

function normalizeTime(str) {
  if (!str) return timestamp();
  if (/\d{4}\/\d{1,2}\/\d{1,2} \d{2}:\d{2}:\d{2}/.test(str)) return str;
  const clean = str.replace(/-/g, '/');
  if (/^\d{4}\/\d{1,2}\/\d{1,2}$/.test(clean)) return clean + ' 00:00:00';
  const withSlash = str.replace(/-/g, '/');
  if (/\d{4}\/\d{1,2}\/\d{1,2} \d{2}:\d{2}:\d{2}/.test(withSlash)) return withSlash;
  return timestamp();
}

module.exports = { timestamp, normalizeTime };