import React, { useEffect, useRef, useState } from 'react';
import {
  Button,
  Descriptions,
  Drawer,
  Empty,
  Form,
  Image,
  Input,
  InputNumber,
  message,
  Modal,
  Popconfirm,
  Select,
  Space,
  Spin,
  Table,
  Tabs,
  Tag,
  Typography,
} from 'antd';
import {AccountBookOutlined, DownloadOutlined, EditOutlined, UnorderedListOutlined} from '@ant-design/icons';
import type { TableProps } from 'antd';
import XinTable from '@/components/XinTable';
import type {
  XinTableColumn,
  XinTableInstance,
  XinTableProps,
} from '@/components/XinTable/typings.ts';
import type IPurchaseOrder from '@/domain/iPurchaseOrder.ts';
import type {
  IBill,
  IBillPrepare,
  IPurchaseCell,
  IPurchaseCellItem,
  IPurchaseDetail,
  IPurchaseDetailRow,
  IPurchaseStoreItem,
  IPurchaseStoreSummary,
} from '@/domain/iPurchaseOrder.ts';
import { PURCHASE_STATUS_MAP, BILL_STATUS_MAP } from '@/domain/iPurchaseOrder.ts';
import { STORE_ORDER_STATUS_MAP } from '@/domain/iStoreOrder.ts';
import {
  exportPurchase,
  generateBill,
  getBillPrepare,
  getPurchaseCell,
  getPurchaseDetail,
  getPurchaseStoreSummary,
  type BillGenerateStoreParams,
  type PurchaseCellUpdateParams,
  type PurchaseRowUpdateParams,
  updatePurchaseCellItem,
  updatePurchaseRow,
} from '@/api/purchase/order.ts';
import { Update } from '@/api/common/table.ts';
import { getSupplierOptions } from '@/api/customer/supplier.ts';
import type ISupplier from '@/domain/iSupplier.ts';
import AuthButton from '@/components/AuthButton';

const { Title, Text } = Typography;

/** 每单位参考价 = 整单价（成本/售价） ÷ 包规数值（包规解析不出正数时按 1 处理，与后端同口径；仅展示参考，不参与金额计算） */
const calcUnitRefPrice = (total: number, spec: string): number => {
  const pack = parseFloat(spec);
  return Number.isFinite(pack) && pack > 0 ? total / pack : total;
};

/**
 * 采购单管理（C1 在门店订单页合并生成 / C2-C3 导出 / C4 明细矩阵修改）
 * 采购单无独立明细表，明细直接溯源门店订货明细：商品行 × 门店列
 */
const PurchaseOrderPage: React.FC = () => {
  const tableRef = useRef<XinTableInstance<IPurchaseOrder>>(null);

  // 详情抽屉
  const [detailOpen, setDetailOpen] = useState(false);
  const [detail, setDetail] = useState<IPurchaseDetail | null>(null);
  const [detailLoading, setDetailLoading] = useState(false);
  const [completing, setCompleting] = useState(false);

  // 行修改弹窗
  const [editingRow, setEditingRow] = useState<IPurchaseDetailRow | null>(null);
  const [rowSaving, setRowSaving] = useState(false);
  const [editForm] = Form.useForm<PurchaseRowUpdateParams>();
  const [suppliers, setSuppliers] = useState<ISupplier[]>([]);

  // 单元格下钻弹窗（门店 × 商品订货明细）
  const [cellOpen, setCellOpen] = useState(false);
  const [cellLoading, setCellLoading] = useState(false);
  const [cellData, setCellData] = useState<IPurchaseCell | null>(null);
  const [cellQuery, setCellQuery] = useState<{ productId: number; storeId: number } | null>(null);

  // 单元格明细编辑（数量/称重）
  const [cellItemOpen, setCellItemOpen] = useState(false);
  const [cellItemTarget, setCellItemTarget] = useState<IPurchaseCellItem | null>(null);
  const [cellItemSaving, setCellItemSaving] = useState(false);
  const [cellItemForm] = Form.useForm<PurchaseCellUpdateParams>();

  // 门店购买详情（按商品聚合的门店采购汇总）
  const [detailTab, setDetailTab] = useState('items');
  const [storeId, setStoreId] = useState<number>(0);
  const [storeSummary, setStoreSummary] = useState<IPurchaseStoreSummary | null>(null);
  const [storeLoading, setStoreLoading] = useState(false);

  // 生成账单（已完成采购单按门店生成：填写配送费/周转筐/托盘数量，金额只读）
  const [billOpen, setBillOpen] = useState(false);
  const [billPrepare, setBillPrepare] = useState<IBillPrepare | null>(null);
  const [billLoading, setBillLoading] = useState(false);
  const [billSaving, setBillSaving] = useState(false);
  const [billForm] = Form.useForm<{ stores: BillGenerateStoreParams[] }>();

  // 弹窗内实时预览：附加金额 = 筐×筐单价 + 托盘×托盘单价；总额 = 商品 + 配送费 + 附加
  const watchBillStores = Form.useWatch('stores', billForm) ?? [];
  const billPreview = (billPrepare?.stores ?? []).map((row, index) => {
    const input = watchBillStores[index] ?? {};
    const deliveryFee = Number(input.delivery_fee ?? 0);
    const added =
      Number(input.box_num ?? 0) * Number(row.box_price) +
      Number(input.tray_num ?? 0) * Number(row.tray_price);
    return {
      added,
      total: Number(row.product_amount) + deliveryFee + added,
    };
  });
  const billAllGenerated =
    (billPrepare?.stores ?? []).length > 0 && billPrepare!.stores.every((row) => row.bill !== null);

  useEffect(() => {
    getSupplierOptions().then((res) => setSuppliers(res.data.data ?? []));
  }, []);

  // 单元格下钻弹窗打开时加载明细
  useEffect(() => {
    if (cellOpen && cellQuery) {
      loadCell();
    }
  }, [cellOpen, cellQuery]);

  // 详情加载后默认选中第一个门店（当前选中门店仍在采购单内则保留）
  useEffect(() => {
    if (detail && detail.stores.length > 0) {
      setStoreId((prev) => (detail.stores.some((s) => s.id === prev) ? prev : detail.stores[0].id));
    }
  }, [detail]);

  // 切到「门店购买详情」页签或切换门店时加载汇总
  useEffect(() => {
    if (detailOpen && detailTab === 'stores' && detail && storeId > 0) {
      void loadStoreSummary();
    }
  }, [detailOpen, detailTab, storeId, detail?.purchase.id]);

  const loadDetail = async (id: number) => {
    setDetailLoading(true);
    try {
      const res = await getPurchaseDetail(id);
      setDetail(res.data.data ?? null);
    } finally {
      setDetailLoading(false);
    }
  };

  const openDetail = async (id: number) => {
    setDetailTab('items');
    setStoreSummary(null);
    setDetailOpen(true);
    await loadDetail(id);
  };

  /** 加载门店购买详情（门店采购汇总） */
  const loadStoreSummary = async () => {
    if (!detail || storeId <= 0) {
      return;
    }
    setStoreLoading(true);
    try {
      const res = await getPurchaseStoreSummary(detail.purchase.id!, storeId);
      setStoreSummary(res.data.data ?? null);
    } finally {
      setStoreLoading(false);
    }
  };

  /** 打开单元格下钻：门店 + 商品 → 该采购单下全部订货明细 */
  const openCell = (row: IPurchaseDetailRow, store: { id: number; name: string }) => {
    setCellQuery({ productId: row.product_id, storeId: store.id });
    setCellData(null);
    setCellOpen(true);
  };

  /** 加载单元格明细 */
  const loadCell = async () => {
    if (!detail || !cellQuery) {
      return;
    }
    setCellLoading(true);
    try {
      const res = await getPurchaseCell(detail.purchase.id!, cellQuery.productId, cellQuery.storeId);
      setCellData(res.data.data ?? null);
    } finally {
      setCellLoading(false);
    }
  };

  /** 单元格明细修改/同步后：刷新弹窗、采购单详情与列表 */
  const refreshAfterCellChange = async () => {
    await loadCell();
    if (detail) {
      await loadDetail(detail.purchase.id!);
    }
    await tableRef.current?.reload();
  };

  const openCellItemEdit = (item: IPurchaseCellItem) => {
    setCellItemTarget(item);
    cellItemForm.setFieldsValue({
      quantity: item.quantity,
      price: Number(item.price ?? 0),
      weight: Number(item.weight ?? 0),
    });
    setCellItemOpen(true);
  };

  /** 提交单元格明细修改：级联重算明细金额、订货单与采购单汇总 */
  const handleCellItemSave = async (values: PurchaseCellUpdateParams) => {
    if (!cellItemTarget?.id) {
      return;
    }
    setCellItemSaving(true);
    try {
      await updatePurchaseCellItem(cellItemTarget.id, values);
      message.success('明细已更新，订货单与采购单汇总已重算');
      setCellItemOpen(false);
      setCellItemTarget(null);
      await refreshAfterCellChange();
    } finally {
      setCellItemSaving(false);
    }
  };

  const openEdit = (row: IPurchaseDetailRow) => {
    setEditingRow(row);
    editForm.setFieldsValue({
      product_name: row.product_name,
      supplier_id: row.supplier_id > 0 ? row.supplier_id : undefined,
      product_spec: row.product_spec,
      unit: row.unit,
      cost_price: Number(row.cost_price),
    });
  };

  /** 提交行修改：同步该商品全部订货明细；syncTarget=product 时追加同步商品档案 */
  const handleEditSave = async (values: PurchaseRowUpdateParams) => {
    if (!detail || !editingRow) {
      return;
    }
    setRowSaving(true);
    try {
      const res = await updatePurchaseRow(detail.purchase.id!, editingRow.product_id, {
        ...values,
        supplier_id: values.supplier_id ?? 0,
      });
      message.success(`已更新 ${res.data.data?.count ?? 0} 条订货明细`);
      setEditingRow(null);
      await loadDetail(detail.purchase.id!);
      await tableRef.current?.reload();
    } finally {
      setRowSaving(false);
    }
  };

  /** 打开生成账单弹窗：拉取按门店汇总的商品金额（只读），初始化配送费/周转筐/托盘数量 */
  const openBillGenerate = async (id: number) => {
    setBillOpen(true);
    setBillLoading(true);
    setBillPrepare(null);
    try {
      const res = await getBillPrepare(id);
      const data = res.data.data ?? null;
      setBillPrepare(data);
      billForm.setFieldsValue({
        stores: (data?.stores ?? []).map((row) => ({
          store_id: row.store_id,
          delivery_fee: row.bill ? Number(row.bill.delivery_fee) : 0,
          box_num: row.bill ? row.bill.box_num : 0,
          tray_num: row.bill ? row.bill.tray_num : 0,
        })),
      });
    } finally {
      setBillLoading(false);
    }
  };

  /** 提交生成账单：按门店各生成一张并关联采购单全部订单，金额由系统汇总不可修改 */
  const handleBillSave = async (values: { stores: BillGenerateStoreParams[] }) => {
    if (!billPrepare) {
      return;
    }
    setBillSaving(true);
    try {
      const res = await generateBill(billPrepare.purchase.id, values.stores);
      message.success(`已生成 ${res.data.data?.count ?? 0} 张门店账单，采购单订单已关联`);
      setBillOpen(false);
      setBillPrepare(null);
      await tableRef.current?.reload();
      if (detail && detail.purchase.id === billPrepare.purchase.id) {
        await loadDetail(detail.purchase.id!);
      }
    } finally {
      setBillSaving(false);
    }
  };

  const handleComplete = async (id: number) => {
    setCompleting(true);
    try {
      await Update(`/purchase/order/${id}/finish`, { status: 3 });
      message.success('采购单已标记完成');
      await tableRef.current?.reload();
    } finally {
      setCompleting(false);
    }
  };

  /** 明细矩阵列：品名/供应商/单价/包规/单位/成本 + 每门店一列（数量）+ 合计 + 操作 */
  const buildItemColumns = (): TableProps<IPurchaseDetailRow>['columns'] => {
    const fixed: NonNullable<TableProps<IPurchaseDetailRow>['columns']> = [
      { title: '品名', dataIndex: 'product_name', width: 120, align: 'center' },
      {
        title: '供应商',
        dataIndex: 'supplier',
        width: 110,
        align: 'center',
        render: (_, row) => row.supplier?.name ?? '-',
      },
      {
        title: '参考成本单价',
        key: 'unit_cost',
        width: 100,
        align: 'center',
        render: (_, row) => `¥${calcUnitRefPrice(Number(row.cost_price), row.product_spec ?? '').toFixed(2)}`,
      },
      { title: '包规', dataIndex: 'product_spec', align: 'center', width: 90, render: (v) => v || '-' },
      { title: '单位', dataIndex: 'unit', width: 70, align: 'center', render: (v) => v || '-' },
      { title: '成本', dataIndex: 'cost_price', width: 90, align: 'center', render: (v) => `¥${Number(v).toFixed(2)}` },
    ];

    const storeColumns = (detail?.stores ?? []).map((store) => ({
      title: <span className={'text-[red]'}>{store.name}</span>,
      key: `store-${store.id}`,
      width: 100,
      align: 'center' as const,
      render: (_: unknown, row: IPurchaseDetailRow) => {
        const quantity = row.cells[store.id];
        return quantity !== undefined ? (
          <Typography.Link onClick={() => openCell(row, store)}>{quantity}</Typography.Link>
        ) : (
          <Text type="secondary">-</Text>
        );
      },
    }));

    const tail: NonNullable<TableProps<IPurchaseDetailRow>['columns']> = [
      {
        title: '合计数量',
        key: 'total_quantity',
        width: 90,
        align: 'center',
        render: (_, row) => <Text strong>{row.quantity}</Text>,
      },
      {
        title: '操作',
        key: 'action',
        width: 90,
        fixed: 'right',
        align: 'center',
        render: (_, row) => (
          <>
            { detail?.purchase.status === 0 ? (
              <AuthButton auth="purchase.order.update">
                <Button
                  size="small"
                  type="link"
                  icon={<EditOutlined />}
                  onClick={() => openEdit(row)}
                >
                  修改
                </Button>
              </AuthButton>
            ) : '-' }
          </>
        ),
      },
    ];

    return [...fixed, ...storeColumns, ...tail];
  };

  /** 底部统计行：按门店统计金额（Σ 门店数量 × 行单价）+ 合计 */
  const renderSummary = () => {
    const stores = detail?.stores ?? [];
    const items = detail?.items ?? [];
    const storeTotals = stores.map((store) =>
      items.reduce(
        (sum, row) => sum + (row.cells[store.id] ?? 0) * Number(row.cost_price),
        0,
      ),
    );
    const totalQuantity = items.reduce((sum, row) => sum + Number(row.quantity), 0);
    const totalAmount = storeTotals.reduce((sum, amount) => sum + amount, 0);

    return (
      <Table.Summary.Row>
        <Table.Summary.Cell index={0} colSpan={6} align="center">
          <Text strong>成本统计（按门店）</Text>
        </Table.Summary.Cell>
        {storeTotals.map((amount, index) => (
          <Table.Summary.Cell key={stores[index].id} index={6 + index} align="center">
            <Text strong>¥{amount.toFixed(2)}</Text>
          </Table.Summary.Cell>
        ))}
        <Table.Summary.Cell index={6 + stores.length} align="center">
          <Text strong>{totalQuantity}</Text>
        </Table.Summary.Cell>
        <Table.Summary.Cell index={7 + stores.length} align="center">
          <Text strong>¥{totalAmount.toFixed(2)}</Text>
        </Table.Summary.Cell>
      </Table.Summary.Row>
    );
  };

  /** 门店购买详情列：商品/购买参考零售价(单价÷包规)/包规/单位/单价/数量/预计金额 */
  const storeColumns: TableProps<IPurchaseStoreItem>['columns'] = [
    { title: '商品', dataIndex: 'product_name', width: 160, align: 'center' },
    {
      title: '参考零售价',
      key: 'retail_price',
      width: 130,
      align: 'center',
      render: (_, row) => `¥${calcUnitRefPrice(Number(row.price), row.product_spec).toFixed(2)}`,
    },
    { title: '包规', dataIndex: 'product_spec', width: 90, align: 'center', render: (v) => v || '-' },
    { title: '单位', dataIndex: 'unit', width: 90, align: 'center', render: (v) => v || '-' },
    {
      title: '单价',
      dataIndex: 'price',
      width: 100,
      align: 'center',
      render: (v) => `¥${Number(v).toFixed(2)}`,
    },
    {
      title: '数量',
      dataIndex: 'quantity',
      width: 90,
      align: 'center',
      render: (v) => <Text strong>{v}</Text>,
    },
    { title: '重量', dataIndex: 'weight', width: 90, align: 'center', render: (v) => `${v || '-'}斤` },
    {
      title: '预计金额',
      dataIndex: 'amount',
      width: 110,
      align: 'center',
      render: (v) => <Text strong>¥{Number(v).toFixed(2)}</Text>,
    },
  ];

  /** 门店购买详情合计行：总数量 + 总预计金额 */
  const renderStoreTotal = () => {
    const items = storeSummary?.items ?? [];
    const totalQuantity = items.reduce((sum, row) => sum + Number(row.quantity), 0);
    const totalAmount = items.reduce((sum, row) => sum + Number(row.amount), 0);
    const totalWeight = items.reduce((sum, row) => sum + Number(row.weight), 0);
    return (
      <Table.Summary.Row>
        <Table.Summary.Cell index={0} colSpan={5} align="center">
          <Text strong>合计</Text>
        </Table.Summary.Cell>
        <Table.Summary.Cell index={5} align="center">
          <Text strong>{totalQuantity}</Text>
        </Table.Summary.Cell>
        <Table.Summary.Cell index={6} align="center">
          <Text strong>{totalWeight.toFixed(3)}斤</Text>
        </Table.Summary.Cell>
        <Table.Summary.Cell index={7} align="center">
          <Text strong type="danger">¥{totalAmount.toFixed(2)}</Text>
        </Table.Summary.Cell>
      </Table.Summary.Row>
    );
  };

  /** 门店账单列：门店/账单号/账单日期/商品金额/配送费/周转筐/托盘/附加金额/总金额 */
  const billColumns: TableProps<IBill>['columns'] = [
    { title: '门店', dataIndex: 'store_name', width: 140, align: 'center' },
    {
      title: '账单号',
      dataIndex: 'bill_no',
      width: 180,
      align: 'center',
      render: (v) => <Text copyable={{ text: v }}>{v}</Text>,
    },
    { title: '账单日期', dataIndex: 'bill_date', width: 110, align: 'center' },
    {
      title: '商品金额',
      dataIndex: 'product_amount',
      width: 110,
      align: 'center',
      render: (v) => `¥${Number(v).toFixed(2)}`,
    },
    {
      title: '配送费',
      dataIndex: 'delivery_fee',
      width: 100,
      align: 'center',
      render: (v) => `¥${Number(v).toFixed(2)}`,
    },
    {
      title: '周转筐',
      key: 'box',
      width: 110,
      align: 'center',
      render: (_, row) => `${row.box_num} × ¥${Number(row.box_price).toFixed(2)}`,
    },
    {
      title: '周转托盘',
      key: 'tray',
      width: 110,
      align: 'center',
      render: (_, row) => `${row.tray_num} × ¥${Number(row.tray_price).toFixed(2)}`,
    },
    {
      title: '附加金额',
      dataIndex: 'added_amount',
      width: 100,
      align: 'center',
      render: (v) => `¥${Number(v).toFixed(2)}`,
    },
    {
      title: '账单总金额',
      dataIndex: 'total_amount',
      width: 120,
      align: 'center',
      render: (v) => <Text strong type="danger">¥{Number(v).toFixed(2)}</Text>,
    },
    {
      title: '支付状态',
      dataIndex: 'status',
      width: 100,
      align: 'center',
      render: (v) => {
        const item = BILL_STATUS_MAP[Number(v ?? 0)];
        return <Tag color={item?.color}>{item?.text}</Tag>;
      },
    },
  ];

  /** 门店账单合计行 */
  const renderBillSummary = () => {
    const bills = detail?.bills ?? [];
    const totalProduct = bills.reduce((sum, row) => sum + Number(row.product_amount), 0);
    const totalDelivery = bills.reduce((sum, row) => sum + Number(row.delivery_fee), 0);
    const totalAdded = bills.reduce((sum, row) => sum + Number(row.added_amount), 0);
    const totalAmount = bills.reduce((sum, row) => sum + Number(row.total_amount), 0);
    return (
      <Table.Summary.Row>
        <Table.Summary.Cell index={0} colSpan={3} align="center">
          <Text strong>合计</Text>
        </Table.Summary.Cell>
        <Table.Summary.Cell index={3} align="center">
          <Text strong>¥{totalProduct.toFixed(2)}</Text>
        </Table.Summary.Cell>
        <Table.Summary.Cell index={4} align="center">
          <Text strong>¥{totalDelivery.toFixed(2)}</Text>
        </Table.Summary.Cell>
        <Table.Summary.Cell index={5} colSpan={2} align="center">
          <Text strong>-</Text>
        </Table.Summary.Cell>
        <Table.Summary.Cell index={7} align="center">
          <Text strong>¥{totalAdded.toFixed(2)}</Text>
        </Table.Summary.Cell>
        <Table.Summary.Cell index={8} align="center">
          <Text strong type="danger">¥{totalAmount.toFixed(2)}</Text>
        </Table.Summary.Cell>
        <Table.Summary.Cell index={9} align="center">
          <Text strong>-</Text>
        </Table.Summary.Cell>
      </Table.Summary.Row>
    );
  };

  const columns: XinTableColumn<IPurchaseOrder>[] = [
    {
      title: '采购单号',
      dataIndex: 'purchase_no',
      valueType: 'text',
      hideInForm: true,
      align: 'center',
      width: 260,
      render: (_, record) => <Text copyable={{ text: record.purchase_no }}>{record.purchase_no}</Text>,
    },
    {
      title: '采购日期',
      dataIndex: 'purchase_date',
      valueType: 'date',
      align: 'center',
      hideInForm: true,
      render: (_, record) => record.purchase_date,
    },
    {
      title: '预估成本',
      dataIndex: 'estimate_amount',
      hideInForm: true,
      hideInSearch: true,
      align: 'center',
      render: (_, record) => `¥${record.estimate_amount}`,
    },
    {
      title: '实际成本',
      dataIndex: 'actual_amount',
      hideInSearch: true,
      valueType: "digit",
      fieldProps: {
        min: 0,
        precision: 3,
        placeholder: "请输入单价"
      },
      align: 'center',
      render: (_, record) =>
        Number(record.actual_amount) > 0 ? (
          <Text strong>¥{record.actual_amount}</Text>
        ) : (
          <Text type="secondary">未录入</Text>
        ),
    },
    {
      title: '总件数',
      dataIndex: 'total_quantity',
      hideInForm: true,
      hideInSearch: true,
      align: 'center',
    },
    {
      title: '备注',
      dataIndex: 'remark',
      valueType: "textarea",
      hideInTable: true,
      hideInSearch: true
    },
    {
      title: '总重量',
      dataIndex: 'total_weight',
      hideInForm: true,
      hideInSearch: true,
      align: 'center',
      render: (_, record) => `${record.total_weight}斤`,
    },
    {
      title: '状态',
      dataIndex: 'status',
      valueType: 'select',
      hideInForm: true,
      fieldProps: {
        options: Object.entries(PURCHASE_STATUS_MAP).map(([value, item]) => ({
          value: Number(value),
          label: item.text,
        })),
      },
      render: (_, record) => {
        const item = PURCHASE_STATUS_MAP[record.status ?? 0];
        return <Tag color={item?.color}>{item?.text}</Tag>;
      },
      align: 'center',
    },
    {
      title: '制单人',
      dataIndex: 'operator',
      hideInForm: true,
      hideInSearch: true,
      render: (_, record) => record.operator?.nickname ?? '-',
      align: 'center',
    },
  ];

  const operateRender: XinTableProps<IPurchaseOrder>['operateRender'] = (record, dom) => [
    record.status === 0 ? dom.edit : null,
    <Button key="detail" size="small" icon={<UnorderedListOutlined />} type={'primary'} onClick={() => openDetail(record.id!)} />,
    record.status === 0 ? (
      <AuthButton auth="purchase.order.update">
        <Popconfirm title="确认该采购单已完成？" description="已完成采购单将锁定，不能再修改订单信息" onConfirm={() => handleComplete(record.id!)}>
          <Button type={'primary'} size="small" variant={'solid'} color={'green'} loading={completing}>
            完成采购
          </Button>
        </Popconfirm>
      </AuthButton>
    ) : (
      <AuthButton auth="purchase.order.bill">
        <Button
          type={'primary'}
          size="small"
          variant={'solid'}
          color={'orange'}
          icon={<AccountBookOutlined />}
          onClick={() => openBillGenerate(record.id!)}
        >
          生成账单
        </Button>
      </AuthButton>
    )
  ];

  const tableProps: XinTableProps<IPurchaseOrder> = {
    api: '/purchase/order',
    columns,
    rowKey: 'id',
    accessName: 'purchase.order',
    tableRef,
    operateRender,
    operateProps: {
      width: 300
    },
    formProps: false,
  };

  return (
    <>
      <div className="mb-5">
        <Title level={3}>采购单</Title>
        <Text type="secondary">
          在「门店订单」页勾选已接单订单合并生成采购单；采购单支持修改订单信息。
        </Text>
      </div>
      <XinTable<IPurchaseOrder> {...tableProps} />

      {/* 采购单详情：商品行 × 门店列矩阵 */}
      <Drawer
        title={detail ? `采购单 ${detail.purchase.purchase_no}` : '采购单详情'}
        open={detailOpen}
        onClose={() => setDetailOpen(false)}
        size={1200}
        loading={detailLoading}
      >
        {detail && (
          <>
            <Title level={5} className="mb-3!">
              采购单信息
            </Title>
            <Descriptions column={3} size="small" bordered>
              <Descriptions.Item label="采购日期">{detail.purchase.purchase_date}</Descriptions.Item>
              <Descriptions.Item label="状态">
                <Tag color={PURCHASE_STATUS_MAP[detail.purchase.status ?? 0]?.color}>
                  {PURCHASE_STATUS_MAP[detail.purchase.status ?? 0]?.text}
                </Tag>
              </Descriptions.Item>
              <Descriptions.Item label="制单人">
                {detail.purchase.operator?.nickname ?? '-'}
              </Descriptions.Item>
              <Descriptions.Item label="预估成本">¥{detail.purchase.estimate_amount}</Descriptions.Item>
              <Descriptions.Item label="实际成本">¥{detail.purchase.actual_amount}</Descriptions.Item>
              <Descriptions.Item label="总件数">{detail.purchase.total_quantity}</Descriptions.Item>
              <Descriptions.Item label="总重量">{detail.purchase.total_weight}</Descriptions.Item>
              <Descriptions.Item label="创建时间" span={2}>{detail.purchase.created_at}</Descriptions.Item>
              <Descriptions.Item label="备注" span={3}>{detail.purchase.remark}</Descriptions.Item>
            </Descriptions>

            <Tabs
              activeKey={detailTab}
              onChange={setDetailTab}
              className="mt-3!"
              items={[
                { key: 'items', label: '商品明细' },
                { key: 'stores', label: '门店购买详情' },
                { key: 'bills', label: '门店账单' },
              ]}
            />

            { detailTab === 'stores' ? (
              <>
                <div className="mb-3 flex items-center gap-2">
                  <Text>选择门店：</Text>
                  <Select
                    value={storeId || undefined}
                    onChange={(value) => setStoreId(value)}
                    placeholder="选择门店"
                    className="w-60!"
                    showSearch
                    optionFilterProp="label"
                    options={detail.stores.map((s) => ({ value: s.id, label: s.name }))}
                  />
                </div>
                <Spin spinning={storeLoading}>
                  {storeSummary && storeSummary.items.length > 0 ? (
                    <Table<IPurchaseStoreItem>
                      rowKey="product_id"
                      size="small"
                      bordered
                      columns={storeColumns}
                      dataSource={storeSummary.items}
                      pagination={false}
                      summary={renderStoreTotal}
                    />
                  ) : (
                    !storeLoading && (
                      <Empty
                        image={Empty.PRESENTED_IMAGE_SIMPLE}
                        description="该门店在此采购单中无采购商品"
                        className="py-8!"
                      />
                    )
                  )}
                </Spin>
              </>
            ) : detailTab === 'bills' ? (
              detail.bills.length > 0 ? (
                <Table<IBill>
                  rowKey="id"
                  size="small"
                  bordered
                  columns={billColumns}
                  dataSource={detail.bills}
                  pagination={false}
                  summary={renderBillSummary}
                />
              ) : (
                <Empty
                  image={Empty.PRESENTED_IMAGE_SIMPLE}
                  description={detail.purchase.status === 0 ? '采购单完成后可在列表操作列生成账单' : '该采购单暂未生成账单'}
                  className="py-8!"
                />
              )
            ) : (
              <>
                <Space style={{ marginBottom: 20 }}>
                  <AuthButton key="export" auth="purchase.order.export">
                    <Button
                      type="primary"
                      ghost
                      icon={<DownloadOutlined />}
                      onClick={() => detail && exportPurchase(detail.purchase.id!)}
                    >
                      导出
                    </Button>
                  </AuthButton>
                </Space>
                <Table<IPurchaseDetailRow>
                  rowKey="product_id"
                  size="small"
                  bordered
                  columns={buildItemColumns()}
                  dataSource={detail.items}
                  pagination={false}
                  scroll={{ x: 'max-content' }}
                  summary={renderSummary}
                />
              </>
            ) }
          </>
        )}
      </Drawer>

      {/* 行修改：品名/供应商/包规/单位/成本 */}
      <Modal
        title={editingRow ? `修改「${editingRow.product_name}」` : '修改明细行'}
        open={editingRow !== null}
        onCancel={() => setEditingRow(null)}
        destroyOnHidden
        footer={[
          <Button key="cancel" onClick={() => setEditingRow(null)}>
            取消
          </Button>,
          <Button key="purchase" type="primary" loading={rowSaving} onClick={() => editForm.submit()}>
            保存
          </Button>
        ]}
      >
        <div className="py-2 text-gray-500">
          「保存」仅修改本采购单中该商品的所有订单项
        </div>
        <Form form={editForm} layout="vertical" onFinish={handleEditSave}>
          <Form.Item
            label="品名"
            name="product_name"
            rules={[{ required: true, message: '请输入品名' }, { max: 100 }]}
          >
            <Input maxLength={100} />
          </Form.Item>
          <Form.Item
            label="供应商"
            name="supplier_id"
            rules={[{ required: true, message: '请选择供应商' }]}
          >
            <Select
              allowClear
              showSearch={{ optionFilterProp: 'label' }}
              placeholder="选择供应商"
              options={suppliers.map((s) => ({ value: s.id, label: s.name }))}
            />
          </Form.Item>
          <Form.Item
            label="包规"
            name="product_spec"
            rules={[{ required: true, message: '请输入包规' }, { max: 100 }]}
          >
            <Input maxLength={100} placeholder="如：10斤/箱" />
          </Form.Item>
          <Form.Item
            label="单位"
            name="unit"
            rules={[{ required: true, message: '请输入单位' },{ max: 20 }]}
          >
            <Input maxLength={20} placeholder="如：斤" />
          </Form.Item>
          <Form.Item
            label="成本"
            name="cost_price"
            rules={[{ required: true, message: '请输入成本' }]}
          >
            <InputNumber min={0} precision={2} prefix="¥" className="w-full" />
          </Form.Item>
        </Form>
      </Modal>

      {/* 单元格下钻 */}
      <Modal
        title={cellData ? `${cellData.store?.name ?? ''} · ${cellData.product?.name ?? ''}` : '门店商品明细'}
        open={cellOpen}
        onCancel={() => setCellOpen(false)}
        footer={null}
        width={1000}
        destroyOnHidden
        styles={{ body: {paddingTop: 16} }}
      >
        <Spin spinning={cellLoading}>
          {cellData && (
            <>
              {cellData.items.length === 0 ? (
                <Empty
                  image={Empty.PRESENTED_IMAGE_SIMPLE}
                  description="该门店无此商品明细"
                  className="py-8!"
                />
              ) : (
                <div className="overflow-hidden rounded border border-gray-200">
                  <div className="flex bg-gray-50 px-4 py-2 text-sm text-gray-500">
                    <div className="flex-1">商品信息</div>
                    <div className="w-30 shrink-0 text-center">单价</div>
                    <div className="w-26 shrink-0 text-center">订货量</div>
                    <div className="w-33 shrink-0 text-center">订货金额</div>
                    <div className="w-33 shrink-0 text-center">重量</div>
                    <div className="w-40 shrink-0 text-center">操作</div>
                  </div>
                  {cellData.items.map((item) => (
                    <div key={item.id} className="flex items-center border-t border-gray-100 px-4 py-3">
                      <div className="flex min-w-0 flex-1 items-center">
                        <Image.PreviewGroup>
                          {item.image ? (
                            <Image
                              src={item.image}
                              width={48}
                              height={48}
                              style={{ objectFit: 'cover', borderRadius: 4 }}
                            />
                          ) : (
                            <div className="flex h-12 w-12 shrink-0 items-center justify-center rounded bg-gray-100 text-xs text-gray-400">
                              暂无图片
                            </div>
                          )}
                        </Image.PreviewGroup>
                        <div className="ml-3 min-w-0">
                          <div className="text-sm font-medium">
                            {item.product_name}
                            <Tag
                              className="ml-2!"
                              color={STORE_ORDER_STATUS_MAP[item.order_status]?.color}
                            >
                              {STORE_ORDER_STATUS_MAP[item.order_status]?.text}
                            </Tag>
                          </div>
                          <div className="mt-0.5 text-xs text-gray-500">
                            订单：{item.order_no}
                          </div>
                          {item.remark ? (
                            <div className="mt-0.5 truncate text-xs text-gray-500">
                              备注：{item.remark}
                            </div>
                          ) : null}
                        </div>
                      </div>
                      <div className="w-30 shrink-0 text-center">¥{item.price}</div>
                      <div className="w-26 shrink-0 text-center">{item.quantity}</div>
                      <div className="w-33 shrink-0 text-center">
                        <Text strong>¥{item.amount}</Text>
                      </div>
                      <div className="w-33 shrink-0 text-center">
                        {item.weight ?? '-'} 斤
                      </div>
                      <div className="w-40 shrink-0 text-center">
                        {detail?.purchase.status === 0 ? (
                          <Space size={0}>
                            <AuthButton auth="purchase.order.update">
                              <Button
                                type="link"
                                size="small"
                                icon={<EditOutlined />}
                                onClick={() => openCellItemEdit(item)}
                              >
                                编辑
                              </Button>
                            </AuthButton>
                          </Space>
                        ) : (
                          <Text type="secondary">-</Text>
                        )}
                      </div>
                    </div>
                  ))}
                </div>
              )}
              {cellData.items.length > 0 && (
                <div className="mt-3! flex justify-end gap-6 text-sm">
                  <Text type="secondary">
                    合计数量：
                    <Text strong>{cellData.items.reduce((sum, item) => sum + item.quantity, 0)}</Text>
                  </Text>
                  <Text type="secondary">
                    合计订货金额：
                    <Text strong type="danger">
                      ¥
                      {cellData.items
                        .reduce((sum, item) => sum + Number(item.amount), 0)
                        .toFixed(2)}
                    </Text>
                  </Text>
                </div>
              )}
            </>
          )}
        </Spin>
      </Modal>

      {/* 单元格明细编辑 */}
      <Modal
        title={cellItemTarget ? `编辑「${cellItemTarget.product_name}」` : '编辑明细'}
        open={cellItemOpen}
        onCancel={() => {
          setCellItemOpen(false);
          setCellItemTarget(null);
        }}
        onOk={() => cellItemForm.submit()}
        confirmLoading={cellItemSaving}
        okText="保存"
        destroyOnHidden
      >
        <div className="py-2 text-gray-500">
          订单 {cellItemTarget?.order_no}；修改保存后，系统将自动重算明细金额、订货单与采购单汇总。
        </div>
        <Form form={cellItemForm} layout="vertical" onFinish={handleCellItemSave}>
          <Form.Item
            label="单价（元）"
            name="price"
            rules={[{ required: true, message: '请输入单价' }]}
          >
            <InputNumber className="w-full" min={0} precision={2} placeholder="请输入单价" />
          </Form.Item>
          <Form.Item
            label="订货量"
            name="quantity"
            rules={[{ required: true, message: '请输入订货量' }]}
          >
            <InputNumber className="w-full" min={0} precision={0} placeholder="请输入订货量" />
          </Form.Item>
          <Form.Item label="称重" name="weight" rules={[{ required: true, message: '请输入称重' }]}>
            <InputNumber className="w-full" min={0} precision={3} placeholder="请输入称重" />
          </Form.Item>
        </Form>
      </Modal>

      {/* 生成账单：按门店填写配送费/周转筐/托盘数量（商品金额只读，由订单汇总） */}
      <Modal
        title={billPrepare ? `生成账单 · ${billPrepare.purchase.purchase_no}` : '生成账单'}
        open={billOpen}
        onCancel={() => {
          setBillOpen(false);
          setBillPrepare(null);
        }}
        onOk={() => billForm.submit()}
        confirmLoading={billSaving}
        okText="确认生成"
        okButtonProps={{ disabled: billAllGenerated }}
        width={960}
        destroyOnHidden
      >
        <Spin spinning={billLoading}>
          {billPrepare && (
            <>
              <div className="py-2 text-gray-500">
                每个门店单独生成一张账单；商品金额由订单汇总不可修改，请填写各门店的配送费与周转筐/托盘数量。
                {billAllGenerated ? '该采购单已全部生成账单，仅可查看。' : '生成后采购单中的全部订单将关联到对应门店账单。'}
              </div>
              <Form form={billForm} layout="vertical" onFinish={handleBillSave}>
                <Form.List name="stores">
                  {(fields) => (
                    <div className="overflow-hidden rounded border border-gray-200">
                      <div className="flex bg-gray-50 px-4 py-2 text-sm text-gray-500">
                        <div className="w-40 shrink-0">门店</div>
                        <div className="w-28 shrink-0 text-center">商品金额</div>
                        <div className="w-32 shrink-0 text-center">配送费（元）</div>
                        <div className="w-32 shrink-0 text-center">周转筐（¥{billPrepare.stores[0]?.box_price ?? '0.00'}）</div>
                        <div className="w-32 shrink-0 text-center">周转托盘（¥{billPrepare.stores[0]?.tray_price ?? '0.00'}）</div>
                        <div className="w-28 shrink-0 text-center">附加金额</div>
                        <div className="flex-1 text-center">账单总金额</div>
                      </div>
                      {fields.map((field) => {
                        const row = billPrepare.stores[field.name];
                        const billed = row?.bill != null;
                        return (
                          <div key={field.key} className="flex items-center border-t border-gray-100 px-4 py-2">
                            <div className="w-40 shrink-0 pr-2 text-sm">
                              <div>{row?.store_name ?? '-'}</div>
                              <div className="text-xs text-gray-400">
                                {row?.order_count ?? 0} 笔订单
                                {billed && <Tag className="ml-1!" color="success">已生成</Tag>}
                              </div>
                            </div>
                            <div className="w-28 shrink-0 text-center">
                              <Text strong>¥{row?.product_amount ?? '0.00'}</Text>
                            </div>
                            <Form.Item name={[field.name, 'store_id']} hidden>
                              <Input />
                            </Form.Item>
                            <Form.Item
                              className="m-0! w-32 shrink-0 px-1!"
                              name={[field.name, 'delivery_fee']}
                              rules={[{ required: true, message: '请输入配送费' }]}
                            >
                              <InputNumber
                                className="w-full"
                                min={0}
                                precision={2}
                                disabled={billed}
                                placeholder="配送费"
                              />
                            </Form.Item>
                            <Form.Item
                              className="m-0! w-32 shrink-0 px-1!"
                              name={[field.name, 'box_num']}
                              rules={[{ required: true, message: '请输入周转筐数量' }]}
                            >
                              <InputNumber
                                className="w-full"
                                min={0}
                                precision={0}
                                disabled={billed}
                                placeholder="周转筐数量"
                              />
                            </Form.Item>
                            <Form.Item
                              className="m-0! w-32 shrink-0 px-1!"
                              name={[field.name, 'tray_num']}
                              rules={[{ required: true, message: '请输入周转托盘数量' }]}
                            >
                              <InputNumber
                                className="w-full"
                                min={0}
                                precision={0}
                                disabled={billed}
                                placeholder="周转托盘数量"
                              />
                            </Form.Item>
                            <div className="w-28 shrink-0 text-center">
                              ¥{(billed ? Number(row.bill!.added_amount) : billPreview[field.name]?.added ?? 0).toFixed(2)}
                            </div>
                            <div className="flex-1 text-center">
                              <Text strong type="danger">
                                ¥{(billed ? Number(row.bill!.total_amount) : billPreview[field.name]?.total ?? 0).toFixed(2)}
                              </Text>
                              {billed && (
                                <div className="text-xs text-gray-400">{row.bill!.bill_no}</div>
                              )}
                            </div>
                          </div>
                        );
                      })}
                    </div>
                  )}
                </Form.List>
              </Form>
            </>
          )}
        </Spin>
      </Modal>
    </>
  );
};

export default PurchaseOrderPage;