import { formatDisplayOrDash } from '@/utils/datetime-display'

import {
  type PaymentFlowStep,
  type PaymentFlowStepKey,
  type PaymentFlowStepState
} from '@/utils/clinical-payment-flow-steps'
import { transferTypeLabel } from '@/utils/protocol-payment-labels'

export type { PaymentFlowStep, PaymentFlowStepKey, PaymentFlowStepState }

function dash(v: unknown) {
  return formatDisplayOrDash(v)
}

function formatAmount(v: unknown) {
  if (v == null || v === '') return '—'
  const n = Number(v)
  if (Number.isNaN(n)) return '—'
  return `¥${n.toLocaleString('zh-CN', { minimumFractionDigits: 2, maximumFractionDigits: 2 })}`
}

function resolveAttachmentUrls(
  detail: Record<string, unknown>,
  urlField: string,
  filesField: string
): string {
  const urls = String(detail[urlField] || '')
  if (urls.trim()) return urls
  const files = detail[filesField]
  if (!Array.isArray(files)) return ''
  return files
    .map((f) => String((f as Record<string, unknown>).fileUrl || '').trim())
    .filter(Boolean)
    .join(',')
}

function hasReceiptSubmit(detail: Record<string, unknown>) {
  const status = String(detail.payStatus || '')
  return ['jfqrz', 'yjf', 'tfqrz', 'ytf'].includes(status)
}

function hasFinanceReceipt(detail: Record<string, unknown>) {
  const status = String(detail.payStatus || '')
  return ['yjf', 'tfqrz', 'ytf'].includes(status)
}

function hasRefundSubmit(detail: Record<string, unknown>) {
  const status = String(detail.payStatus || '')
  return ['tfqrz', 'ytf'].includes(status)
}

function hasFinanceRefund(detail: Record<string, unknown>) {
  const status = String(detail.payStatus || '')
  return status === 'ytf'
}

function resolveStepState(
  key: PaymentFlowStepKey,
  detail: Record<string, unknown>,
  activeStepKey?: PaymentFlowStepKey
): PaymentFlowStepState {
  if (activeStepKey === key) return 'current'

  const doneMap: Record<PaymentFlowStepKey, boolean> = {
    'receipt-submit': hasReceiptSubmit(detail),
    'finance-receipt': hasFinanceReceipt(detail),
    'refund-submit': hasRefundSubmit(detail),
    'finance-refund': hasFinanceRefund(detail)
  }

  if (doneMap[key]) return 'done'
  return 'pending'
}

function receiptSubmitTime(detail: Record<string, unknown>) {
  const status = String(detail.payStatus || '')
  if (status === 'jfqrz') return dash(detail.updateTime)
  if (hasFinanceReceipt(detail) && detail.transferTime) return dash(detail.transferTime)
  return '—'
}

function financeReceiptTime(detail: Record<string, unknown>) {
  const status = String(detail.payStatus || '')
  if (status === 'jfqrz' || status === 'dfj') return '—'
  return dash(detail.financeConfirmTime || detail.updateTime)
}

function refundSubmitTime(detail: Record<string, unknown>) {
  const status = String(detail.payStatus || '')
  if (!['tfqrz', 'ytf'].includes(status)) return '—'
  if (status === 'tfqrz') return dash(detail.updateTime)
  return dash(detail.refundApplyTime || detail.updateTime)
}

function refundFinanceTime(detail: Record<string, unknown>) {
  const status = String(detail.payStatus || '')
  if (status !== 'ytf') return '—'
  return dash(detail.refundFinanceConfirmTime || detail.updateTime)
}

export function buildProtocolPaymentFlowSteps(
  detail: Record<string, unknown> | null | undefined,
  activeStepKey?: PaymentFlowStepKey
): PaymentFlowStep[] {
  const d = detail || {}
  const transferUrls = resolveAttachmentUrls(d, 'transferAttachments', 'attachments')
  const financeUrls = resolveAttachmentUrls(
    d,
    'financeConfirmAttachments',
    'financeConfirmAttachmentFiles'
  )
  const refundUrls = resolveAttachmentUrls(d, 'refundAttachments', 'refundAttachmentFiles')
  const refundFinanceUrls = resolveAttachmentUrls(
    d,
    'refundFinanceConfirmAttachments',
    'refundFinanceConfirmAttachmentFiles'
  )

  return [
    {
      key: 'receipt-submit',
      title: '缴费确认信息',
      state: resolveStepState('receipt-submit', d, activeStepKey),
      time: receiptSubmitTime(d),
      fields: [
        { label: '转账方式', value: transferTypeLabel(String(d.transferType || '')) || '—' },
        { label: '实缴金额(元)', value: formatAmount(d.transferAmount) },
        { label: '转账时间', value: dash(d.transferTime) },
        { label: '备注', value: dash(d.remark), multiline: true },
        {
          label: '转账凭证',
          value: '',
          slot: 'attachments',
          attachmentUrls: transferUrls
        }
      ]
    },
    {
      key: 'finance-receipt',
      title: '缴费财务确认信息',
      state: resolveStepState('finance-receipt', d, activeStepKey),
      time: financeReceiptTime(d),
      fields: [
        { label: '财务备注', value: dash(d.financeRemark), multiline: true },
        {
          label: '财务确认附件',
          value: '',
          slot: 'attachments',
          attachmentUrls: financeUrls
        }
      ]
    },
    {
      key: 'refund-submit',
      title: '退费确认信息',
      state: resolveStepState('refund-submit', d, activeStepKey),
      time: refundSubmitTime(d),
      fields: [
        { label: '退费金额(元)', value: formatAmount(d.refundAmount) },
        { label: '退费备注', value: dash(d.refundRemark), multiline: true },
        {
          label: '退费附件',
          value: '',
          slot: 'attachments',
          attachmentUrls: refundUrls
        }
      ]
    },
    {
      key: 'finance-refund',
      title: '退费财务确认信息',
      state: resolveStepState('finance-refund', d, activeStepKey),
      time: refundFinanceTime(d),
      fields: [
        { label: '财务备注', value: dash(d.refundFinanceRemark), multiline: true },
        {
          label: '财务确认附件',
          value: '',
          slot: 'attachments',
          attachmentUrls: refundFinanceUrls
        }
      ]
    }
  ]
}