import { isPlInternalCustomerName } from '@/utils/pl-internal-customer'

export type PlanContractDisplayLine = {
  side: string
  no: string
  contractId?: string
  pending?: boolean
}

type PlanContractLike = {
  contractId?: string
  contractNo?: string
}

type PlanContractParties = {
  supplierName?: string | null
  customerName?: string | null
  supplierContracts?: PlanContractLike[]
  demanderContracts?: PlanContractLike[]
}

/** 单侧：有编号显示编号；非内置缺合同「待补充」；内置缺合同「—」 */
export function planContractSideLines(
  side: '供' | '需',
  contracts: PlanContractLike[] | undefined,
  customerName?: string | null
): PlanContractDisplayLine[] {
  const lines: PlanContractDisplayLine[] = []
  for (const item of contracts || []) {
    const contractId = item.contractId ? String(item.contractId) : undefined
    const no = item.contractNo || contractId
    if (no) lines.push({ side, no: String(no), contractId })
  }
  if (lines.length) return lines
  if (isPlInternalCustomerName(customerName)) {
    return [{ side, no: '—' }]
  }
  return [{ side, no: '待补充', pending: true }]
}

/** 合同列：供/需各至少一行 */
export function planContractLines(plan: PlanContractParties): PlanContractDisplayLine[] {
  return [
    ...planContractSideLines('供', plan.supplierContracts, plan.supplierName),
    ...planContractSideLines('需', plan.demanderContracts, plan.customerName)
  ]
}