/** 地磅页日期工具（避免引入 dayjs） */
export function formatYmd(d = new Date()) {
  const x = d instanceof Date ? d : new Date(d)
  if (Number.isNaN(x.getTime())) return ''
  const y = x.getFullYear()
  const m = String(x.getMonth() + 1).padStart(2, '0')
  const day = String(x.getDate()).padStart(2, '0')
  return `${y}-${m}-${day}`
}

export function addDays(base, n) {
  const d = new Date(base)
  d.setDate(d.getDate() + n)
  return d
}

/** 本周周一～周日 YYYY-MM-DD */
export function weekRange(base = new Date()) {
  const today = new Date(base)
  const day = today.getDay() || 7
  const monday = addDays(today, 1 - day)
  const sunday = addDays(monday, 6)
  return { from: formatYmd(monday), to: formatYmd(sunday) }
}

export function nowYmdHms() {
  const d = new Date()
  const ymd = formatYmd(d)
  const hh = String(d.getHours()).padStart(2, '0')
  const mm = String(d.getMinutes()).padStart(2, '0')
  const ss = String(d.getSeconds()).padStart(2, '0')
  return `${ymd} ${hh}:${mm}:${ss}`
}