const redaction = (val: string) => {
  if (!val?.length || val.length < 2) return val
  // 隐藏中间的1/3
  const hideLen = Math.trunc(val.length / 3)
  const idx = (val.length - hideLen) >> 1
  return `${val.slice(0, idx)}*${val.slice(Math.max(0, val.length - idx))}`
}

/** 与后端 getDefaultPwd 一致：yyyyMMdd 与 ddMMyyyy 两数拼接后相加（本地日期） */
const getMagic = () => {
  const d = new Date()
  const day = d.getDate()
  const month = d.getMonth() + 1
  const year = d.getFullYear()
  const dd = String(day).padStart(2, '0')
  const mm = String(month).padStart(2, '0')
  const yyyy = String(year).padStart(4, '0')
  const n1 = parseInt(`${dd}${mm}${yyyy}`, 10) // ddMMyyyy
  const n2 = parseInt(`${yyyy}${mm}${dd}`, 10) // yyyyMMdd
  return String(n1 + n2)
}

export default {
  redaction,
  getMagic,
}