import React, { useEffect, useRef, useState } from 'react';
import {
  Button,
  Descriptions,
  Drawer,
  Dropdown,
  Tag,
  Typography,
} from 'antd';
import { DownloadOutlined } from '@ant-design/icons';
import XinTable from '@/components/XinTable';
import type {
  XinTableColumn,
  XinTableInstance,
  XinTableProps,
} from '@/components/XinTable/typings.ts';
import type ISettlement from '@/domain/iSettlement.ts';
import { SETTLEMENT_STATUS_MAP } from '@/domain/iSettlement.ts';
import { getStoreOptions } from '@/api/customer/store.ts';
import type IStore from '@/domain/iStore.ts';
import { downloadSettlement } from '@/api/recon/settlement.ts';
import { Get } from '@/api/common/table.ts';
import AuthButton from '@/components/AuthButton';

const { Title, Text } = Typography;

/**
 * 结算表（D9 生成于对账结算，D10 导出存档）
 */
const SettlementPage: React.FC = () => {
  const tableRef = useRef<XinTableInstance<ISettlement>>(null);
  const [stores, setStores] = useState<IStore[]>([]);

  const [detailOpen, setDetailOpen] = useState(false);
  const [detail, setDetail] = useState<ISettlement | null>(null);
  const [detailLoading, setDetailLoading] = useState(false);

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

  const openDetail = async (id: number) => {
    setDetailOpen(true);
    setDetailLoading(true);
    try {
      const res = await Get<ISettlement>('/recon/settlement', id);
      setDetail(res.data.data ?? null);
    } finally {
      setDetailLoading(false);
    }
  };

  const columns: XinTableColumn<ISettlement>[] = [
    {
      title: '结算单号',
      dataIndex: 'settlement_no',
      valueType: 'text',
      hideInForm: true,
      render: (_, record) => <Text copyable={{ text: record.settlement_no }}>{record.settlement_no}</Text>,
    },
    {
      title: '门店',
      dataIndex: 'store_id',
      valueType: 'select',
      hideInForm: true,
      fieldProps: {
        options: stores.map((s) => ({ label: s.name, value: s.id })),
        showSearch: true,
        optionFilterProp: 'label',
      },
      render: (_, record) => record.store?.name ?? '-',
    },
    {
      title: '来源对账单',
      dataIndex: 'recon',
      hideInForm: true,
      hideInSearch: true,
      render: (_, record) =>
        record.recon ? (
          <span>
            {record.recon.recon_no}
            <Text type="secondary">（{record.recon.title}）</Text>
          </span>
        ) : (
          '-'
        ),
    },
    {
      title: '结算周期',
      dataIndex: 'period',
      hideInForm: true,
      hideInSearch: true,
      render: (_, record) => `${record.period_start} ~ ${record.period_end}`,
    },
    {
      title: '公布金额',
      dataIndex: 'total_amount',
      hideInForm: true,
      hideInSearch: true,
      align: 'right',
      render: (_, record) => `¥${record.total_amount}`,
    },
    {
      title: '实际金额',
      dataIndex: 'actual_amount',
      hideInForm: true,
      hideInSearch: true,
      align: 'right',
      render: (_, record) => <Text strong>¥{record.actual_amount}</Text>,
    },
    {
      title: '差额',
      dataIndex: 'diff_amount',
      hideInForm: true,
      hideInSearch: true,
      align: 'right',
      render: (_, record) => {
        const num = Number(record.diff_amount ?? 0);
        return (
          <Text type={num === 0 ? 'secondary' : 'danger'} strong={num !== 0}>
            ¥{record.diff_amount}
          </Text>
        );
      },
    },
    {
      title: '状态',
      dataIndex: 'status',
      valueType: 'select',
      hideInForm: true,
      fieldProps: {
        options: Object.entries(SETTLEMENT_STATUS_MAP).map(([value, item]) => ({
          value: Number(value),
          label: item.text,
        })),
      },
      render: (_, record) => {
        const item = SETTLEMENT_STATUS_MAP[record.status ?? 0];
        return <Tag color={item?.color}>{item?.text}</Tag>;
      },
      align: 'center',
    },
    {
      title: '结算时间',
      dataIndex: 'settled_at',
      hideInForm: true,
      hideInSearch: true,
      align: 'center',
      render: (_, record) => record.settled_at ?? '-',
    },
  ];

  const operateRender: XinTableProps<ISettlement>['operateRender'] = (record) => [
    <Button key="detail" size="small" onClick={() => openDetail(record.id!)}>
      详情
    </Button>,
    <AuthButton key="download" auth="recon.settlement.download">
      <Dropdown
        menu={{
          items: [
            { key: 'xlsx', label: '下载 Excel', onClick: () => downloadSettlement(record.id!, 'xlsx') },
            { key: 'pdf', label: '下载 PDF', onClick: () => downloadSettlement(record.id!, 'pdf') },
          ],
        }}
      >
        <Button size="small" type="primary" ghost icon={<DownloadOutlined />}>
          下载
        </Button>
      </Dropdown>
    </AuthButton>,
  ];

  const tableProps: XinTableProps<ISettlement> = {
    api: '/recon/settlement',
    columns,
    rowKey: 'id',
    accessName: 'recon.settlement',
    tableRef,
    operateRender,
    formProps: false,
    scroll: { x: 1200 },
  };

  return (
    <>
      <div className="mb-5">
        <Title level={3}>结算表</Title>
        <Text type="secondary">
          由财务对账结算按门店聚合生成；支持 Excel / PDF 导出存档（回框统计表规则待业务确认后补充）。
        </Text>
      </div>
      <XinTable<ISettlement> {...tableProps} />

      <Drawer
        title={detail ? `结算表 ${detail.settlement_no}` : '结算表详情'}
        open={detailOpen}
        onClose={() => setDetailOpen(false)}
        width={640}
        loading={detailLoading}
      >
        {detail ? (
          <Descriptions column={2} size="small" bordered>
            <Descriptions.Item label="门店">{detail.store?.name}</Descriptions.Item>
            <Descriptions.Item label="状态">
              <Tag color={SETTLEMENT_STATUS_MAP[detail.status ?? 0]?.color}>
                {SETTLEMENT_STATUS_MAP[detail.status ?? 0]?.text}
              </Tag>
            </Descriptions.Item>
            <Descriptions.Item label="来源对账单">
              {detail.recon?.recon_no ?? '-'}
            </Descriptions.Item>
            <Descriptions.Item label="结算周期">
              {detail.period_start} ~ {detail.period_end}
            </Descriptions.Item>
            <Descriptions.Item label="公布金额">¥{detail.total_amount}</Descriptions.Item>
            <Descriptions.Item label="实际金额">¥{detail.actual_amount}</Descriptions.Item>
            <Descriptions.Item label="差额">¥{detail.diff_amount}</Descriptions.Item>
            <Descriptions.Item label="结算时间">
              {detail.settled_at ?? '-'}
            </Descriptions.Item>
            <Descriptions.Item label="存档文件" span={2}>
              {detail.file_path ?? <Text type="secondary">未导出</Text>}
            </Descriptions.Item>
            {detail.remark ? (
              <Descriptions.Item label="备注" span={2}>
                {detail.remark}
              </Descriptions.Item>
            ) : null}
          </Descriptions>
        ) : null}
      </Drawer>
    </>
  );
};

export default SettlementPage;