import { useState } from 'react';
import { Button, Descriptions, Drawer, Form, Select, Table, Typography, message } from 'antd';
import type { ColumnsType } from 'antd/es/table';
import { request } from '../lib/api';
import { fmtTime } from '../lib/constants';
import { useAdminList } from '../lib/useAdminList';

type Row = {
  id: string;
  ticketNo: string;
  ticketType: string;
  status: string;
  refType: string;
  refId: string;
  remark?: string;
  createdAt: string;
};

export default function TicketsPage() {
  const [filters, setFilters] = useState<Record<string, string>>({});
  const { data, loading, page, pageSize, setPage, setPageSize, reload } = useAdminList<Row>(
    '/admin/tickets',
    () => {
      const qs = new URLSearchParams();
      if (filters.ticketType) qs.set('ticketType', filters.ticketType);
      if (filters.status) qs.set('status', filters.status);
      return qs;
    },
    [filters],
  );
  const [detail, setDetail] = useState<Record<string, unknown> | null>(null);
  const [drawerOpen, setDrawerOpen] = useState(false);

  async function approve(id: string) {
    await request(`/admin/tickets/${id}/approve`, { method: 'POST', body: JSON.stringify({}) });
    message.success('已审批通过');
    reload();
    setDrawerOpen(false);
  }

  async function reject(id: string) {
    await request(`/admin/tickets/${id}/reject`, {
      method: 'POST',
      body: JSON.stringify({ remark: '驳回' }),
    });
    message.success('已驳回');
    reload();
    setDrawerOpen(false);
  }

  const columns: ColumnsType<Row> = [
    { title: '工单号', dataIndex: 'ticketNo', width: 180 },
    { title: '类型', dataIndex: 'ticketType', width: 100 },
    { title: '状态', dataIndex: 'status', width: 90 },
    { title: '关联', width: 140, render: (_, r) => `${r.refType}#${r.refId}` },
    { title: '备注', dataIndex: 'remark', ellipsis: true },
    { title: '时间', dataIndex: 'createdAt', width: 160, render: fmtTime },
    {
      title: '操作', width: 80,
      render: (_, row) => (
        <Button type="link" size="small" onClick={async () => {
          setDetail(await request(`/admin/tickets/${row.id}`));
          setDrawerOpen(true);
        }}>详情</Button>
      ),
    },
  ];

  return (
    <div>
      <Typography.Title level={4}>工单中心</Typography.Title>
      <Form layout="inline" style={{ marginBottom: 16 }} onFinish={(v) => { setFilters(v); setPage(1); }}>
        <Form.Item name="ticketType" label="类型">
          <Select allowClear style={{ width: 120 }} options={[
            { value: 'REFUND', label: '退款' },
            { value: 'RESHIPMENT', label: '补发' },
            { value: 'ALERT', label: '异常' },
          ]} />
        </Form.Item>
        <Form.Item name="status" label="状态"><Input allowClear placeholder="PENDING" /></Form.Item>
        <Button type="primary" htmlType="submit">筛选</Button>
      </Form>
      <Table rowKey="id" loading={loading} columns={columns} dataSource={data?.items ?? []} scroll={{ x: 900 }}
        pagination={{ current: page, pageSize, total: data?.total ?? 0, showSizeChanger: true, onChange: (p, ps) => { setPage(p); setPageSize(ps); } }} />
      <Drawer title="工单详情" width={480} open={drawerOpen} onClose={() => setDrawerOpen(false)}
        extra={detail && (detail.status === 'PENDING' || detail.status === 'OPEN') ? (
          <>
            <Button type="primary" onClick={() => approve(String(detail.id))} style={{ marginRight: 8 }}>通过</Button>
            <Button danger onClick={() => reject(String(detail.id))}>驳回</Button>
          </>
        ) : null}>
        {detail && (
          <Descriptions column={1} bordered size="small">
            <Descriptions.Item label="工单号">{String(detail.ticketNo)}</Descriptions.Item>
            <Descriptions.Item label="类型">{String(detail.ticketType)}</Descriptions.Item>
            <Descriptions.Item label="状态">{String(detail.status)}</Descriptions.Item>
            <Descriptions.Item label="关联">{String(detail.refType)} #{String(detail.refId)}</Descriptions.Item>
            <Descriptions.Item label="备注">{String(detail.remark ?? '—')}</Descriptions.Item>
          </Descriptions>
        )}
      </Drawer>
    </div>
  );
}