export const SF_TRANSPORT_MODE = 'sfkd'

export function isSfExpress(mode: string | null | undefined) {
  return String(mode || '').trim() === SF_TRANSPORT_MODE
}

export function freightAmountText(
  mode: string | null | undefined,
  amount: number | string | null | undefined
) {
  if (isSfExpress(mode) && (amount === null || amount === undefined || amount === '')) return '月结'
  if (amount === null || amount === undefined || amount === '') return ''
  const value = Number(amount)
  if (!Number.isFinite(value)) return ''
  return value.toFixed(2)
}

export function validateFreightHeader(input: {
  transportMode: string
  freightAmount: number | null
  waybillNo: string
}) {
  if (!String(input.transportMode || '').trim()) return '请选择运输方式'
  if (isSfExpress(input.transportMode)) {
    const waybill = String(input.waybillNo || '').trim()
    if (!waybill) return '请填写顺丰单号'
    if (waybill.length > 64) return '顺丰单号不能超过 64 个字符'
    return ''
  }
  if (
    input.freightAmount == null ||
    !Number.isFinite(Number(input.freightAmount)) ||
    Number(input.freightAmount) < 0
  ) {
    return '请填写运费'
  }
  return ''
}

export function buildFreightHeaderPayload(input: {
  transportMode: string
  freightAmount: number | null
  waybillNo: string
}) {
  const sf = isSfExpress(input.transportMode)
  return {
    transportMode: String(input.transportMode || '').trim(),
    waybillNo: sf ? String(input.waybillNo || '').trim() : '',
    freightAmount: sf ? null : Number(input.freightAmount)
  }
}

export function buildSettlePayload(ids: string[], freightAmount: string) {
  const payload: { ids: string[]; freightAmount?: number } = { ids }
  if (ids.length === 1 && String(freightAmount || '').trim()) {
    payload.freightAmount = Number(String(freightAmount).trim())
  }
  return payload
}