import { useEffect, useState } from 'react';
import { Button, Descriptions, Drawer, Form, Input, Segmented, Space, Table, Tag, Typography } from 'antd';
import type { ColumnsType } from 'antd/es/table';
import { USER_LOG_CATEGORY_OPTIONS, resolveUserLogCategory, USER_LOG_CATEGORY_LABELS, type UserLogCategory } from '../lib/user-log';
import { useSearchParams } from 'react-router-dom';
import { request } from '../lib/api';
import { AdminCellLine } from '../components/AdminCellLine';
import { fmtTime } from '../lib/constants';
import { useAdminList } from '../lib/useAdminList';

type Row = {
  id: string;
  userId: string | null;
  userNo: string | null;
  phone: string | null;
  nickname: string | null;
  category: UserLogCategory | null;
  eventName: string;
  clientApp: string | null;
  refType: string | null;
  refId: string | null;
  extraJson: Record<string, unknown> | null;
  createdAt: string;
};

const CATEGORY_LABELS = USER_LOG_CATEGORY_LABELS;

function summarizeExtra(json: Record<string, unknown> | null) {
  if (!json) return '—';
  const text = JSON.stringify(json);
  return text.length > 80 ? `${text.slice(0, 80)}…` : text;
}

export default function UserLogsPage() {
  const [searchParams, setSearchParams] = useSearchParams();
  const [form] = Form.useForm();
  const [category, setCategory] = useState(searchParams.get('category') ?? '');
  const [filters, setFilters] = useState<Record<string, string>>(() => ({
    userId: searchParams.get('userId') ?? '',
    phone: searchParams.get('phone') ?? '',
    userNo: searchParams.get('userNo') ?? '',
    eventName: searchParams.get('eventName') ?? '',
  }));
  const { data, loading, page, pageSize, setPage, setPageSize, reload } = useAdminList<Row>(
    '/admin/logs/users',
    () => {
      const qs = new URLSearchParams();
      if (filters.userId) qs.set('userId', filters.userId);
      if (filters.phone) qs.set('phone', filters.phone);
      if (filters.userNo) qs.set('userNo', filters.userNo);
      if (filters.eventName) qs.set('eventName', filters.eventName);
      if (category) qs.set('category', category);
      return qs;
    },
    [filters, category],
  );
  const [detail, setDetail] = useState<Record<string, unknown> | null>(null);
  const [drawerOpen, setDrawerOpen] = useState(false);

  useEffect(() => {
    form.setFieldsValue(filters);
  }, [form, filters]);

  const columns: ColumnsType<Row> = [
    { title: '时间', dataIndex: 'createdAt', width: 160, render: fmtTime },
    {
      title: '用户', width: 180, ellipsis: true,
      render: (_, r) => (
        <AdminCellLine
          primary={r.nickname || r.userNo}
          secondary={r.phone || r.userId}
        />
      ),
    },
    {
      title: '分类', dataIndex: 'category', width: 100,
      render: (v: UserLogCategory | null, r) => (
        <Tag>{CATEGORY_LABELS[v ?? ''] || resolveUserLogCategory(r.eventName) || '其他'}</Tag>
      ),
    },
    { title: '事件', dataIndex: 'eventName', width: 160 },
    {
      title: '关联', width: 120,
      render: (_, r) => (r.refType && r.refId ? `${r.refType}#${r.refId}` : '—'),
    },
    {
      title: '摘要', ellipsis: true,
      render: (_, r) => summarizeExtra(r.extraJson),
    },
    {
      title: '操作', width: 80,
      render: (_, row) => (
        <Button type="link" size="small" onClick={async () => {
          setDetail(await request(`/admin/logs/users/${row.id}`));
          setDrawerOpen(true);
        }}>详情</Button>
      ),
    },
  ];

  return (
    <div>
      <Typography.Title level={4}>用户日志</Typography.Title>
      <Segmented
        style={{ marginBottom: 16 }}
        options={USER_LOG_CATEGORY_OPTIONS.map((o) => ({ value: o.value, label: o.label }))}
        value={category}
        onChange={(v) => {
          setCategory(String(v));
          setPage(1);
          const next = new URLSearchParams(searchParams);
          if (v) next.set('category', String(v));
          else next.delete('category');
          setSearchParams(next);
        }}
      />
      <Form form={form} layout="inline" style={{ marginBottom: 16 }} onFinish={(v) => {
        setFilters(v);
        setPage(1);
        const next = new URLSearchParams(searchParams);
        for (const key of ['userId', 'phone', 'userNo', 'eventName'] as const) {
          if (v[key]) next.set(key, v[key]);
          else next.delete(key);
        }
        setSearchParams(next);
      }}>
        <Form.Item name="userId" label="用户ID"><Input allowClear style={{ width: 120 }} /></Form.Item>
        <Form.Item name="phone" label="手机号"><Input allowClear style={{ width: 130 }} /></Form.Item>
        <Form.Item name="userNo" label="用户编号"><Input allowClear style={{ width: 120 }} /></Form.Item>
        <Form.Item name="eventName" label="事件名"><Input allowClear style={{ width: 160 }} placeholder="pay_success" /></Form.Item>
        <Form.Item><Button type="primary" htmlType="submit">筛选</Button></Form.Item>
        <Form.Item><Button onClick={() => { form.resetFields(); setFilters({}); setCategory(''); setSearchParams({}); setPage(1); }}>重置</Button></Form.Item>
      </Form>
      <Table rowKey="id" loading={loading} columns={columns} dataSource={data?.items ?? []} scroll={{ x: 1000 }}
        pagination={{ current: page, pageSize, total: data?.total ?? 0, showSizeChanger: true, onChange: (p, ps) => { setPage(p); setPageSize(ps); } }} />
      <Drawer title="日志详情" width={520} open={drawerOpen} onClose={() => setDrawerOpen(false)}>
        {detail && (
          <Descriptions column={1} bordered size="small">
            <Descriptions.Item label="ID">{String(detail.id)}</Descriptions.Item>
            <Descriptions.Item label="用户">{String(detail.nickname || detail.userNo || detail.userId || '—')}</Descriptions.Item>
            <Descriptions.Item label="手机">{String(detail.phone || '—')}</Descriptions.Item>
            <Descriptions.Item label="分类">{CATEGORY_LABELS[String(detail.category ?? '')] || String(detail.category || '—')}</Descriptions.Item>
            <Descriptions.Item label="事件">{String(detail.eventName)}</Descriptions.Item>
            <Descriptions.Item label="客户端">{String(detail.clientApp || '—')}</Descriptions.Item>
            <Descriptions.Item label="关联">{detail.refType ? `${String(detail.refType)}#${String(detail.refId)}` : '—'}</Descriptions.Item>
            <Descriptions.Item label="时间">{fmtTime(String(detail.createdAt))}</Descriptions.Item>
            <Descriptions.Item label="参数">
              <pre style={{ margin: 0, whiteSpace: 'pre-wrap', wordBreak: 'break-all' }}>
                {JSON.stringify(detail.extraJson ?? {}, null, 2)}
              </pre>
            </Descriptions.Item>
          </Descriptions>
        )}
      </Drawer>
    </div>
  );
}