import { App, Alert, Form, Input, InputNumber, Modal, Select } from 'antd'
import type { FormInstance } from 'antd'
import { useMutation, useQuery, useQueryClient } from '@tanstack/react-query'
import { useEffect, useState } from 'react'

import { createAdminManualOrderCost, fetchAdminFundAccounts } from '@/services/admin'
import { getAdminRole } from '@/utils/admin-auth'

export type ManualOrderCostItem = {
  orderItemId: number
  matchSku?: string
  skuName?: string
  skuCode?: string
  quantity?: number
}

type ManualOrderCostModalProps = {
  open: boolean
  orderId: number
  orderNo: string
  items: ManualOrderCostItem[]
  onClose: () => void
}

type ManualOrderCostFormValues = {
  orderItemId: number
  fundAccountId: number
  amountYuan: number
  expenseCategory: string
  payeeName?: string
  paymentMethod?: string
  evidence?: string
  note?: string
}

const CATEGORY_OPTIONS = [
  { value: 'service_fee', label: '人工服务费' },
  { value: 'goods_purchase', label: '商品采购' },
  { value: 'compensation', label: '赔付 / 补偿' },
  { value: 'refund_advance', label: '垫付退款' },
  { value: 'freight', label: '运费' },
  { value: 'other', label: '其他' },
]

const PAYMENT_METHOD_OPTIONS = [
  { value: 'wechat', label: '微信' },
  { value: 'alipay', label: '支付宝' },
  { value: 'bank', label: '银行卡' },
  { value: 'cash', label: '现金' },
  { value: 'platform_balance', label: '平台余额' },
  { value: 'other', label: '其他' },
]

function itemLabel(item: ManualOrderCostItem) {
  // 只展示平台判断用的真实 SKU，引流长标题不进录单选项。
  const sku = item.matchSku || item.skuName || item.skuCode || `订单项 #${item.orderItemId}`
  return item.quantity && item.quantity > 1 ? `${sku} ×${item.quantity}` : sku
}

export default function ManualOrderCostModal({
  open,
  orderId,
  orderNo,
  items,
  onClose,
}: ManualOrderCostModalProps) {
  const { message } = App.useApp()
  const queryClient = useQueryClient()
  const [form] = Form.useForm<ManualOrderCostFormValues>()
  const fundAccountsQuery = useQuery({
    queryKey: ['admin-fund-accounts', 'agent'],
    queryFn: () =>
      fetchAdminFundAccounts({ accountType: 'agent', status: 'active', pageSize: 200 }),
    enabled: open,
  })
  const fundAccounts = fundAccountsQuery.data?.data.items || []
  const soleFundAccountId = fundAccounts.length === 1 ? fundAccounts[0]?.id : undefined
  const isSupport = getAdminRole() === 'support'
  const ownFundAccount = isSupport ? fundAccounts[0] : undefined

  useEffect(() => {
    if (!open) return
    form.resetFields()
    form.setFieldsValue({
      orderItemId: items.length === 1 ? items[0].orderItemId : undefined,
      fundAccountId: soleFundAccountId,
      amountYuan: undefined,
      expenseCategory: 'service_fee',
      paymentMethod: 'other',
    })
  }, [form, items, open, soleFundAccountId])

  const mutation = useMutation({
    mutationFn: (values: ManualOrderCostFormValues) =>
      createAdminManualOrderCost({
        orderId,
        orderItemId: values.orderItemId,
        fundAccountId: values.fundAccountId,
        amountFen: Math.max(1, Math.round(Number(values.amountYuan || 0) * 100)),
        expenseCategory: values.expenseCategory,
        payeeName: values.payeeName || '内部人工',
        paymentMethod: values.paymentMethod || 'other',
        note: values.note || '',
        evidenceJson: values.evidence
          ? { reference: values.evidence }
          : { note: values.note || '订单页人工录单' },
      }),
    onSuccess: (response) => {
      const result = response.data
      if (result.warning) {
        message.warning(result.warning)
      } else {
        message.success(`已计入订单成本，支出单号 ${result.expenseNo}`)
      }
      void queryClient.invalidateQueries({ queryKey: ['admin-fund-accounts'] })
      void queryClient.invalidateQueries({ queryKey: ['admin-fund-expenses'] })
      void queryClient.invalidateQueries({ queryKey: ['admin-sales-profit-overview'] })
      void queryClient.invalidateQueries({ queryKey: ['admin-sales-facts'] })
      void queryClient.invalidateQueries({ queryKey: ['admin-order-detail', String(orderId)] })
      onClose()
    },
    onError: (error) => {
      message.error(error instanceof Error ? error.message : '录入人工成本失败')
    },
  })

  async function submit() {
    const values = await form.validateFields()
    mutation.mutate(values)
  }

  return (
    <Modal
      open={open}
      title="人工录单 / 录入订单成本"
      okText="确认录入并计入成本"
      cancelText="取消"
      confirmLoading={mutation.isPending}
      onOk={() => void submit()}
      onCancel={onClose}
      destroyOnHidden
      width={620}
    >
      <Form<ManualOrderCostFormValues>
        form={form as FormInstance<ManualOrderCostFormValues>}
        layout="vertical"
        initialValues={{ expenseCategory: 'service_fee', paymentMethod: 'other' }}
      >
        <Alert
          type="info"
          showIcon
          style={{ marginBottom: 14 }}
          message="每一单单独录实际金额，不按小时、不按单量套模板"
          description="成本会从所选客服备用金账户扣减，并关联到订单号；只有一笔订单项时自动带入，多笔时需要选择具体订单项。录入即写入成本快照并计入销售毛利，没有审批与报销环节。"
        />
        <Form.Item label="订单号">
          <Input value={orderNo} readOnly />
        </Form.Item>
        {isSupport ? (
          <>
            <Form.Item label="备用金账户" extra="只能使用自己的备用金账户">
              <Input
                readOnly
                value={
                  ownFundAccount
                    ? `${ownFundAccount.ownerName} · ${ownFundAccount.accountNo} · 余额 ¥${(
                        ownFundAccount.balanceFen / 100
                      ).toFixed(2)}`
                    : '当前账号还没有备用金账户'
                }
              />
            </Form.Item>
            <Form.Item name="fundAccountId" hidden>
              <Input />
            </Form.Item>
          </>
        ) : (
          <Form.Item
            name="fundAccountId"
            label="备用金账户"
            rules={[{ required: true, message: '请选择备用金账户' }]}
            extra="人工支出会直接从该客服的备用金余额扣减"
          >
            <Select
              showSearch
              optionFilterProp="label"
              loading={fundAccountsQuery.isLoading}
              placeholder="请选择这笔支出从哪个客服备用金账户出"
              options={fundAccounts.map((account) => ({
                value: account.id,
                label: `${account.ownerName} · ${account.accountNo} · 余额 ¥${(
                  account.balanceFen / 100
                ).toFixed(2)}`,
              }))}
            />
          </Form.Item>
        )}
        {!fundAccountsQuery.isLoading && fundAccounts.length === 0 ? (
          <Alert
            type="warning"
            showIcon
            style={{ marginBottom: 14 }}
            message="没有可用的客服备用金账户"
            description="请先到「备用金」页为客服开通账户并拨付备用金，否则无法登记人工支出。"
          />
        ) : null}
        {items.length === 1 ? (
          <>
            <Form.Item label="计入订单项">
              <Input value={itemLabel(items[0])} readOnly />
            </Form.Item>
            <Form.Item name="orderItemId" hidden>
              <Input />
            </Form.Item>
          </>
        ) : (
          <Form.Item
            name="orderItemId"
            label="计入订单项"
            rules={[{ required: true, message: '请选择订单项' }]}
          >
            <Select
              placeholder="订单有多个商品，请选择计入哪一项"
              options={items.map((item) => ({
                value: item.orderItemId,
                label: itemLabel(item),
              }))}
            />
          </Form.Item>
        )}
        <Form.Item
          name="amountYuan"
          label="人工成本金额（元）"
          rules={[{ required: true, message: '请输入实际金额' }]}
        >
          <InputNumber
            min={0.01}
            precision={2}
            style={{ width: '100%' }}
            placeholder="例如 12.50"
            prefix="¥"
          />
        </Form.Item>
        <Form.Item
          name="expenseCategory"
          label="费用类型"
          rules={[{ required: true, message: '请选择费用类型' }]}
        >
          <Select options={CATEGORY_OPTIONS} />
        </Form.Item>
        <Form.Item name="payeeName" label="处理人 / 收款方">
          <Input placeholder="例如：客服小王、上游商家；留空记内部人工" maxLength={120} />
        </Form.Item>
        <Form.Item name="paymentMethod" label="付款方式">
          <Select options={PAYMENT_METHOD_OPTIONS} />
        </Form.Item>
        <Form.Item name="evidence" label="凭证链接 / 流水号（可选）">
          <Input placeholder="转账截图链接、流水号等；留空则用备注作为凭证" maxLength={300} />
        </Form.Item>
        <Form.Item name="note" label="备注">
          <Input.TextArea
            rows={3}
            maxLength={500}
            showCount
            placeholder="这一单实际做了什么、为什么是这个金额"
          />
        </Form.Item>
      </Form>
    </Modal>
  )
}