/**
 * 运营统计看板
 * 
 * 展示 DAU/DAT、模块使用统计、实时流水账
 */

import { useState } from 'react';
import { useQuery } from '@tanstack/react-query';
import { Card, Statistic, Row, Col, Table, Tag, Spin, Empty, Tooltip } from 'antd';
import { 
  UserOutlined, 
  BankOutlined, 
  ExportOutlined,
  MessageOutlined,
  BookOutlined,
  SearchOutlined,
  FileTextOutlined,
  SyncOutlined,
  LoginOutlined,
  CloudUploadOutlined,
  DeleteOutlined,
  WarningOutlined,
  ReloadOutlined,
} from '@ant-design/icons';
import { getOverview, getLiveFeed } from '../api/statsApi';
import type { OverviewData, ActivityLog } from '../api/statsApi';

// ==================== 模块图标映射 ====================

const MODULE_ICONS: Record<string, React.ReactNode> = {
  'SYSTEM': <LoginOutlined />,
  'AIA': <MessageOutlined />,
  'PKB': <BookOutlined />,
  'ASL': <SearchOutlined />,
  'DC': <FileTextOutlined />,
  'RVW': <FileTextOutlined />,
  'IIT': <SyncOutlined />,
};

const MODULE_COLORS: Record<string, string> = {
  'SYSTEM': '#8c8c8c',
  'AIA': '#1890ff',
  'PKB': '#52c41a',
  'ASL': '#722ed1',
  'DC': '#fa8c16',
  'RVW': '#eb2f96',
  'IIT': '#13c2c2',
};

const ACTION_ICONS: Record<string, React.ReactNode> = {
  'LOGIN': <LoginOutlined style={{ color: '#52c41a' }} />,
  'USE': <MessageOutlined style={{ color: '#1890ff' }} />,
  'EXPORT': <CloudUploadOutlined style={{ color: '#722ed1' }} />,
  'CREATE': <ExportOutlined style={{ color: '#fa8c16' }} />,
  'DELETE': <DeleteOutlined style={{ color: '#ff4d4f' }} />,
  'ERROR': <WarningOutlined style={{ color: '#ff4d4f' }} />,
};

// ==================== 组件 ====================

export default function StatsDashboardPage() {
  const [liveFeedLimit] = useState(50);

  // 获取大盘数据
  const { data: overview, isLoading: overviewLoading, refetch: refetchOverview } = useQuery({
    queryKey: ['admin-stats-overview'],
    queryFn: getOverview,
    refetchInterval: 30000, // 30秒自动刷新
  });

  // 获取实时流水账
  const { data: liveFeed, isLoading: liveFeedLoading, refetch: refetchLiveFeed } = useQuery({
    queryKey: ['admin-stats-live-feed', liveFeedLimit],
    queryFn: () => getLiveFeed(liveFeedLimit),
    refetchInterval: 10000, // 10秒自动刷新
  });

  // 刷新所有数据
  const handleRefresh = () => {
    refetchOverview();
    refetchLiveFeed();
  };

  // 流水账表格列
  const columns = [
    {
      title: '时间',
      dataIndex: 'createdAt',
      key: 'createdAt',
      width: 90,
      render: (time: string) => {
        const date = new Date(time);
        return (
          <Tooltip title={date.toLocaleString()}>
            <span className="text-gray-500 text-xs">
              {date.toLocaleTimeString('zh-CN', { hour: '2-digit', minute: '2-digit', second: '2-digit' })}
            </span>
          </Tooltip>
        );
      },
    },
    {
      title: '动作',
      dataIndex: 'action',
      key: 'action',
      width: 80,
      render: (action: string) => (
        <span className="flex items-center gap-1">
          {ACTION_ICONS[action] || null}
          <span className="text-xs">{action}</span>
        </span>
      ),
    },
    {
      title: '模块',
      dataIndex: 'module',
      key: 'module',
      width: 80,
      render: (module: string) => (
        <Tag 
          icon={MODULE_ICONS[module]} 
          color={MODULE_COLORS[module]}
          className="text-xs"
        >
          {module}
        </Tag>
      ),
    },
    {
      title: '功能',
      dataIndex: 'feature',
      key: 'feature',
      width: 150,
      ellipsis: true,
    },
    {
      title: '用户',
      dataIndex: 'userName',
      key: 'userName',
      width: 100,
      render: (name: string | null, record: ActivityLog) => (
        <Tooltip title={record.tenantName || '未知租户'}>
          <span className="text-gray-600">{name || '-'}</span>
        </Tooltip>
      ),
    },
    {
      title: '详情',
      dataIndex: 'info',
      key: 'info',
      ellipsis: true,
      render: (info: string | null) => (
        <span className="text-gray-400 text-xs">{info || '-'}</span>
      ),
    },
  ];

  return (
    <div className="p-6 bg-gray-50 min-h-screen">
      {/* 页面标题 */}
      <div className="flex justify-between items-center mb-6">
        <div>
          <h1 className="text-2xl font-bold text-gray-800">运营监控看板</h1>
          <p className="text-gray-500 text-sm mt-1">实时监控系统使用情况</p>
        </div>
        <button
          onClick={handleRefresh}
          className="flex items-center gap-2 px-4 py-2 bg-white border border-gray-200 rounded-lg hover:bg-gray-50 transition-colors"
        >
          <ReloadOutlined className={overviewLoading || liveFeedLoading ? 'animate-spin' : ''} />
          刷新数据
        </button>
      </div>

      {/* 核心指标卡片 */}
      <Row gutter={[16, 16]} className="mb-6">
        <Col xs={24} sm={8}>
          <Card className="shadow-sm hover:shadow-md transition-shadow">
            <Statistic
              title={<span className="text-gray-600">今日活跃医生 (DAU)</span>}
              value={overview?.dau ?? 0}
              prefix={<UserOutlined className="text-blue-500" />}
              loading={overviewLoading}
              valueStyle={{ color: '#1890ff', fontWeight: 'bold' }}
            />
          </Card>
        </Col>
        <Col xs={24} sm={8}>
          <Card className="shadow-sm hover:shadow-md transition-shadow">
            <Statistic
              title={<span className="text-gray-600">今日活跃租户 (DAT)</span>}
              value={overview?.dat ?? 0}
              prefix={<BankOutlined className="text-green-500" />}
              loading={overviewLoading}
              valueStyle={{ color: '#52c41a', fontWeight: 'bold' }}
            />
          </Card>
        </Col>
        <Col xs={24} sm={8}>
          <Card className="shadow-sm hover:shadow-md transition-shadow">
            <Statistic
              title={<span className="text-gray-600">今日导出次数</span>}
              value={overview?.exportCount ?? 0}
              prefix={<ExportOutlined className="text-purple-500" />}
              loading={overviewLoading}
              valueStyle={{ color: '#722ed1', fontWeight: 'bold' }}
            />
          </Card>
        </Col>
      </Row>

      {/* 模块使用统计 */}
      {overview?.moduleStats && Object.keys(overview.moduleStats).length > 0 && (
        <Card 
          title="模块使用统计" 
          className="mb-6 shadow-sm"
          extra={<span className="text-gray-400 text-xs">今日</span>}
        >
          <Row gutter={[16, 16]}>
            {Object.entries(overview.moduleStats).map(([module, count]) => (
              <Col key={module} xs={12} sm={8} md={6} lg={4}>
                <div className="text-center p-4 bg-gray-50 rounded-lg">
                  <div className="text-2xl mb-2">
                    {MODULE_ICONS[module] || <MessageOutlined />}
                  </div>
                  <div className="text-2xl font-bold" style={{ color: MODULE_COLORS[module] }}>
                    {count}
                  </div>
                  <div className="text-gray-500 text-sm">{module}</div>
                </div>
              </Col>
            ))}
          </Row>
        </Card>
      )}

      {/* 实时流水账 */}
      <Card 
        title="实时操作流水" 
        className="shadow-sm"
        extra={
          <span className="text-gray-400 text-xs">
            最近 {liveFeedLimit} 条 · 10秒自动刷新
          </span>
        }
      >
        {liveFeedLoading ? (
          <div className="flex justify-center py-12">
            <Spin tip="加载中..." />
          </div>
        ) : liveFeed && liveFeed.length > 0 ? (
          <Table
            dataSource={liveFeed}
            columns={columns}
            rowKey="id"
            size="small"
            pagination={false}
            scroll={{ y: 400 }}
            className="activity-table"
          />
        ) : (
          <Empty description="暂无操作记录" />
        )}
      </Card>

      {/* 自定义样式 */}
      <style>{`
        .activity-table .ant-table-tbody > tr:hover > td {
          background-color: #f0f5ff !important;
        }
        .activity-table .ant-table-thead > tr > th {
          background-color: #fafafa;
          font-weight: 600;
        }
      `}</style>
    </div>
  );
}