import { useState, useEffect } from 'react';
import { useRouter } from 'next/router';
import Head from 'next/head';
import { toast } from 'react-hot-toast';
import {
  MagnifyingGlassIcon,
  BuildingOfficeIcon,
  UsersIcon,
  DocumentTextIcon,
  CurrencyDollarIcon,
  PlusIcon,
  PencilIcon,
  TrashIcon,
  EyeIcon,
  ChevronLeftIcon,
  ChevronRightIcon
} from '@heroicons/react/24/outline';
import { supabase, TABLES } from '@/lib/supabase';
import { getDemoData } from '@/lib/demo-data';
import { formatTime } from '@/utils';
import Layout from '@/components/Layout';

interface EnterpriseContract {
  id: string;
  enterprise_id: string;
  enterprise_name: string;
  contract_number: string;
  contract_type: 'annual' | 'monthly' | 'project';
  start_date: string;
  end_date: string;
  total_amount: number;
  currency: string;
  status: 'active' | 'expired' | 'terminated';
  service_rates: {
    ai_voice: number;           // AI语音翻译费率（元/分钟）
    ai_video: number;           // AI视频翻译费率（元/分钟）
    sign_language: number;      // 手语翻译费率（元/分钟）
    human_interpreter: number;  // 真人翻译费率（元/分钟）
    document_translation: number; // 文档翻译费率（元/字）
  };
  created_at: string;
  updated_at: string;
}

interface EnterpriseEmployee {
  id: string;
  enterprise_id: string;
  enterprise_name: string;
  name: string;
  email: string;
  department: string;
  position: string;
  status: 'active' | 'inactive';
  total_calls: number;
  total_cost: number;
  created_at: string;
}

interface EnterpriseBilling {
  id: string;
  enterprise_id: string;
  enterprise_name: string;
  period: string;
  total_calls: number;
  total_duration: number;
  total_amount: number;
  currency: string;
  status: 'pending' | 'paid' | 'overdue';
  due_date: string;
  paid_date?: string;
  created_at: string;
}

interface EnterpriseFilters {
  search: string;
  tab: 'contracts' | 'employees' | 'billing';
  status: 'all' | 'active' | 'inactive' | 'expired' | 'pending' | 'paid' | 'overdue';
  enterprise: 'all' | string;
  sortBy: 'created_at' | 'name' | 'amount' | 'total_calls';
  sortOrder: 'asc' | 'desc';
}

export default function EnterprisePage() {
  const [contracts, setContracts] = useState<EnterpriseContract[]>([]);
  const [employees, setEmployees] = useState<EnterpriseEmployee[]>([]);
  const [billing, setBilling] = useState<EnterpriseBilling[]>([]);
  const [loading, setLoading] = useState(true);
  const [currentPage, setCurrentPage] = useState(1);
  const [totalPages, setTotalPages] = useState(1);
  const [totalCount, setTotalCount] = useState(0);
  const [isDemoMode, setIsDemoMode] = useState(false);
  const [filters, setFilters] = useState<EnterpriseFilters>({
    search: '',
    tab: 'contracts',
    status: 'all',
    enterprise: 'all',
    sortBy: 'created_at',
    sortOrder: 'desc'
  });
  const router = useRouter();

  const pageSize = 20;

  // 获取企业数据
  const fetchEnterpriseData = async (page = 1) => {
    try {
      setLoading(true);
      
      // 检查是否为演示模式
      const supabaseUrl = process.env.NEXT_PUBLIC_SUPABASE_URL;
      const isDemo = !supabaseUrl || supabaseUrl === 'https://demo.supabase.co' || supabaseUrl === '';
      setIsDemoMode(isDemo);
      
      if (isDemo) {
        // 使用演示数据
        const result = await getDemoData.enterprise();
        
        switch (filters.tab) {
          case 'contracts':
            setContracts(result.contracts);
            setTotalCount(result.contracts.length);
            break;
          case 'employees':
            setEmployees(result.employees);
            setTotalCount(result.employees.length);
            break;
          case 'billing':
            setBilling(result.billing);
            setTotalCount(result.billing.length);
            break;
        }
        
        setTotalPages(Math.ceil(totalCount / pageSize));
        setCurrentPage(page);
      } else {
        // 使用真实数据 - 这里需要根据实际数据库结构调整
        // 暂时使用演示数据
        const result = await getDemoData.enterprise();
        
        switch (filters.tab) {
          case 'contracts':
            setContracts(result.contracts);
            setTotalCount(result.contracts.length);
            break;
          case 'employees':
            setEmployees(result.employees);
            setTotalCount(result.employees.length);
            break;
          case 'billing':
            setBilling(result.billing);
            setTotalCount(result.billing.length);
            break;
        }
        
        setTotalPages(Math.ceil(totalCount / pageSize));
        setCurrentPage(page);
      }

    } catch (error) {
      console.error('Error fetching enterprise data:', error);
      toast.error('获取企业数据失败');
    } finally {
      setLoading(false);
    }
  };

  // 处理筛选变更
  const handleFilterChange = (key: keyof EnterpriseFilters, value: any) => {
    setFilters(prev => ({
      ...prev,
      [key]: value
    }));
  };

  // 应用筛选
  const applyFilters = () => {
    setCurrentPage(1);
    fetchEnterpriseData(1);
  };

  // 重置筛选
  const resetFilters = () => {
    setFilters({
      search: '',
      tab: filters.tab,
      status: 'all',
      enterprise: 'all',
      sortBy: 'created_at',
      sortOrder: 'desc'
    });
    setCurrentPage(1);
    fetchEnterpriseData(1);
  };

  // 获取状态颜色
  const getStatusColor = (status: string) => {
    switch (status) {
      case 'active':
        return 'bg-green-100 text-green-800';
      case 'inactive':
      case 'expired':
        return 'bg-red-100 text-red-800';
      case 'terminated':
        return 'bg-gray-100 text-gray-800';
      case 'pending':
        return 'bg-yellow-100 text-yellow-800';
      case 'paid':
        return 'bg-green-100 text-green-800';
      case 'overdue':
        return 'bg-red-100 text-red-800';
      default:
        return 'bg-gray-100 text-gray-800';
    }
  };

  // 获取状态文本
  const getStatusText = (status: string) => {
    switch (status) {
      case 'active':
        return '活跃';
      case 'inactive':
        return '非活跃';
      case 'expired':
        return '已过期';
      case 'terminated':
        return '已终止';
      case 'pending':
        return '待付款';
      case 'paid':
        return '已付款';
      case 'overdue':
        return '逾期';
      default:
        return '未知';
    }
  };

  // 删除员工
  const handleDeleteEmployee = async (employeeId: string) => {
    if (confirm('确定要删除此员工吗？')) {
      try {
        // 这里应该调用删除API
        toast.success('员工删除成功');
        fetchEnterpriseData();
      } catch (error) {
        toast.error('删除员工失败');
      }
    }
  };

  // 员工结算
  const handleEmployeeSettlement = async (employeeId: string) => {
    try {
      // 这里应该调用结算API
      toast.success('员工结算完成');
      fetchEnterpriseData();
    } catch (error) {
      toast.error('员工结算失败');
    }
  };

  // 获取唯一的企业列表（用于筛选下拉框）
  const getUniqueEnterprises = () => {
    const enterprises = new Set();
    employees.forEach(emp => enterprises.add(emp.enterprise_name));
    contracts.forEach(contract => enterprises.add(contract.enterprise_name));
    return Array.from(enterprises) as string[];
  };

  useEffect(() => {
    fetchEnterpriseData();
  }, [filters.tab]);

  const renderContracts = () => (
    <div className="bg-white shadow rounded-lg">
      <div className="px-4 py-5 sm:p-6">
        <div className="sm:flex sm:items-center sm:justify-between mb-6">
          <div>
            <h3 className="text-lg leading-6 font-medium text-gray-900">企业合同管理</h3>
            <p className="mt-1 text-sm text-gray-500">管理企业合同信息和服务费率配置</p>
          </div>
        </div>

        {/* 搜索和筛选 */}
        <div className="mb-6 grid grid-cols-1 gap-4 sm:grid-cols-2 lg:grid-cols-4">
          <div className="relative">
            <MagnifyingGlassIcon className="h-5 w-5 absolute left-3 top-3 text-gray-400" />
            <input
              type="text"
              placeholder="搜索企业名称或合同号..."
              className="pl-10 w-full rounded-md border-gray-300 shadow-sm focus:border-indigo-500 focus:ring-indigo-500"
              value={filters.search}
              onChange={(e) => handleFilterChange('search', e.target.value)}
            />
          </div>
          
          <select
            className="rounded-md border-gray-300 shadow-sm focus:border-indigo-500 focus:ring-indigo-500"
            value={filters.status}
            onChange={(e) => handleFilterChange('status', e.target.value)}
          >
            <option value="all">所有状态</option>
            <option value="active">生效中</option>
            <option value="expired">已过期</option>
            <option value="terminated">已终止</option>
          </select>

          <div></div>

          <div className="flex space-x-2">
            <button
              onClick={applyFilters}
              className="flex-1 bg-indigo-600 text-white px-4 py-2 rounded-md hover:bg-indigo-700 focus:outline-none focus:ring-2 focus:ring-indigo-500"
            >
              应用筛选
            </button>
            <button
              onClick={resetFilters}
              className="flex-1 bg-gray-300 text-gray-700 px-4 py-2 rounded-md hover:bg-gray-400 focus:outline-none focus:ring-2 focus:ring-gray-500"
            >
              重置
            </button>
          </div>
        </div>

        {/* 合同列表 */}
        <div className="space-y-6">
          {contracts.map((contract) => (
            <div key={contract.id} className="bg-white border border-gray-200 rounded-lg shadow-sm overflow-hidden">
              <div className="px-6 py-4 border-b border-gray-200">
                <div className="flex items-center justify-between">
                  <div>
                    <h4 className="text-lg font-medium text-gray-900">{contract.enterprise_name}</h4>
                    <p className="text-sm text-gray-500">合同号: {contract.contract_number}</p>
                  </div>
                  <span className={`inline-flex px-3 py-1 text-sm font-semibold rounded-full ${getStatusColor(contract.status)}`}>
                    {getStatusText(contract.status)}
                  </span>
                </div>
              </div>
              
              <div className="px-6 py-4">
                <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4 mb-4">
                  <div>
                    <dt className="text-sm font-medium text-gray-500">合同类型</dt>
                    <dd className="mt-1 text-sm text-gray-900">
                      {contract.contract_type === 'annual' ? '年度合同' : 
                       contract.contract_type === 'monthly' ? '月度合同' : '项目合同'}
                    </dd>
                  </div>
                  <div>
                    <dt className="text-sm font-medium text-gray-500">合同期限</dt>
                    <dd className="mt-1 text-sm text-gray-900">
                      {formatTime(contract.start_date)} - {formatTime(contract.end_date)}
                    </dd>
                  </div>
                  <div>
                    <dt className="text-sm font-medium text-gray-500">合同金额</dt>
                    <dd className="mt-1 text-sm text-gray-900">
                      ¥{contract.total_amount.toLocaleString()}
                    </dd>
                  </div>
                </div>

                {/* 服务费率配置 */}
                <div className="mt-4">
                  <h5 className="text-sm font-medium text-gray-900 mb-3">服务费率配置</h5>
                  <div className="grid grid-cols-2 md:grid-cols-3 lg:grid-cols-5 gap-3">
                    <div className="bg-blue-50 p-3 rounded-lg">
                      <div className="text-xs text-blue-600 font-medium">AI语音翻译</div>
                      <div className="text-sm text-blue-900 font-semibold">¥{contract.service_rates.ai_voice}/分钟</div>
                    </div>
                    <div className="bg-green-50 p-3 rounded-lg">
                      <div className="text-xs text-green-600 font-medium">AI视频翻译</div>
                      <div className="text-sm text-green-900 font-semibold">¥{contract.service_rates.ai_video}/分钟</div>
                    </div>
                    <div className="bg-purple-50 p-3 rounded-lg">
                      <div className="text-xs text-purple-600 font-medium">手语翻译</div>
                      <div className="text-sm text-purple-900 font-semibold">¥{contract.service_rates.sign_language}/分钟</div>
                    </div>
                    <div className="bg-orange-50 p-3 rounded-lg">
                      <div className="text-xs text-orange-600 font-medium">真人翻译</div>
                      <div className="text-sm text-orange-900 font-semibold">¥{contract.service_rates.human_interpreter}/分钟</div>
                    </div>
                    <div className="bg-indigo-50 p-3 rounded-lg">
                      <div className="text-xs text-indigo-600 font-medium">文档翻译</div>
                      <div className="text-sm text-indigo-900 font-semibold">¥{contract.service_rates.document_translation}/字</div>
                    </div>
                  </div>
                </div>

                <div className="mt-4 flex justify-end space-x-2">
                  <button className="text-indigo-600 hover:text-indigo-900 text-sm font-medium">
                    <EyeIcon className="h-4 w-4 inline mr-1" />
                    查看详情
                  </button>
                  <button className="text-green-600 hover:text-green-900 text-sm font-medium">
                    <PencilIcon className="h-4 w-4 inline mr-1" />
                    编辑费率
                  </button>
                </div>
              </div>
            </div>
          ))}
        </div>

        {/* 分页 */}
        {totalPages > 1 && (
          <div className="mt-6 flex items-center justify-between">
            <div className="text-sm text-gray-700">
              显示第 {(currentPage - 1) * pageSize + 1} - {Math.min(currentPage * pageSize, totalCount)} 条，共 {totalCount} 条
            </div>
            <div className="flex space-x-2">
              <button
                onClick={() => fetchEnterpriseData(currentPage - 1)}
                disabled={currentPage === 1}
                className="px-3 py-2 text-sm font-medium text-gray-500 bg-white border border-gray-300 rounded-md hover:bg-gray-50 disabled:opacity-50 disabled:cursor-not-allowed"
              >
                <ChevronLeftIcon className="h-4 w-4" />
              </button>
              <span className="px-3 py-2 text-sm font-medium text-gray-700">
                {currentPage} / {totalPages}
              </span>
              <button
                onClick={() => fetchEnterpriseData(currentPage + 1)}
                disabled={currentPage === totalPages}
                className="px-3 py-2 text-sm font-medium text-gray-500 bg-white border border-gray-300 rounded-md hover:bg-gray-50 disabled:opacity-50 disabled:cursor-not-allowed"
              >
                <ChevronRightIcon className="h-4 w-4" />
              </button>
            </div>
          </div>
        )}
      </div>
    </div>
  );

  const renderEmployees = () => (
    <div className="bg-white shadow rounded-lg">
      <div className="px-4 py-5 sm:p-6">
        <div className="sm:flex sm:items-center sm:justify-between mb-6">
          <div>
            <h3 className="text-lg leading-6 font-medium text-gray-900">企业员工管理</h3>
            <p className="mt-1 text-sm text-gray-500">管理企业员工信息和通话记录</p>
          </div>
        </div>

        {/* 搜索和筛选 */}
        <div className="mb-6 grid grid-cols-1 gap-4 sm:grid-cols-2 lg:grid-cols-4">
          <div className="relative">
            <MagnifyingGlassIcon className="h-5 w-5 absolute left-3 top-3 text-gray-400" />
            <input
              type="text"
              placeholder="搜索员工姓名或邮箱..."
              className="pl-10 w-full rounded-md border-gray-300 shadow-sm focus:border-indigo-500 focus:ring-indigo-500"
              value={filters.search}
              onChange={(e) => handleFilterChange('search', e.target.value)}
            />
          </div>
          
          <select
            className="rounded-md border-gray-300 shadow-sm focus:border-indigo-500 focus:ring-indigo-500"
            value={filters.enterprise}
            onChange={(e) => handleFilterChange('enterprise', e.target.value)}
          >
            <option value="all">所有企业</option>
            {getUniqueEnterprises().map(enterprise => (
              <option key={enterprise} value={enterprise}>{enterprise}</option>
            ))}
          </select>

          <select
            className="rounded-md border-gray-300 shadow-sm focus:border-indigo-500 focus:ring-indigo-500"
            value={filters.status}
            onChange={(e) => handleFilterChange('status', e.target.value)}
          >
            <option value="all">所有状态</option>
            <option value="active">活跃</option>
            <option value="inactive">停用</option>
          </select>

          <div className="flex space-x-2">
            <button
              onClick={applyFilters}
              className="flex-1 bg-indigo-600 text-white px-4 py-2 rounded-md hover:bg-indigo-700 focus:outline-none focus:ring-2 focus:ring-indigo-500"
            >
              应用筛选
            </button>
            <button
              onClick={resetFilters}
              className="flex-1 bg-gray-300 text-gray-700 px-4 py-2 rounded-md hover:bg-gray-400 focus:outline-none focus:ring-2 focus:ring-gray-500"
            >
              重置
            </button>
          </div>
        </div>

        {/* 员工列表 */}
        <div className="overflow-hidden shadow ring-1 ring-black ring-opacity-5 md:rounded-lg">
          <table className="min-w-full divide-y divide-gray-300">
            <thead className="bg-gray-50">
              <tr>
                <th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wide">
                  员工信息
                </th>
                <th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wide">
                  所属企业
                </th>
                <th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wide">
                  部门/职位
                </th>
                <th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wide">
                  通话统计
                </th>
                <th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wide">
                  状态
                </th>
                <th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wide">
                  操作
                </th>
              </tr>
            </thead>
            <tbody className="bg-white divide-y divide-gray-200">
              {employees.map((employee) => (
                <tr key={employee.id} className="hover:bg-gray-50">
                  <td className="px-6 py-4 whitespace-nowrap">
                    <div className="flex items-center">
                      <div className="flex-shrink-0 h-10 w-10">
                        <div className="h-10 w-10 rounded-full bg-indigo-100 flex items-center justify-center">
                          <span className="text-sm font-medium text-indigo-800">
                            {employee.name.charAt(0)}
                          </span>
                        </div>
                      </div>
                      <div className="ml-4">
                        <div className="text-sm font-medium text-gray-900">{employee.name}</div>
                        <div className="text-sm text-gray-500">{employee.email}</div>
                      </div>
                    </div>
                  </td>
                  <td className="px-6 py-4 whitespace-nowrap">
                    <div className="text-sm text-gray-900">{employee.enterprise_name}</div>
                  </td>
                  <td className="px-6 py-4 whitespace-nowrap">
                    <div className="text-sm text-gray-900">{employee.department}</div>
                    <div className="text-sm text-gray-500">{employee.position}</div>
                  </td>
                  <td className="px-6 py-4 whitespace-nowrap">
                    <div className="text-sm text-gray-900">{employee.total_calls} 次通话</div>
                    <div className="text-sm text-gray-500">¥{employee.total_cost.toFixed(2)}</div>
                  </td>
                  <td className="px-6 py-4 whitespace-nowrap">
                    <span className={`inline-flex px-2 py-1 text-xs font-semibold rounded-full ${getStatusColor(employee.status)}`}>
                      {getStatusText(employee.status)}
                    </span>
                  </td>
                  <td className="px-6 py-4 whitespace-nowrap text-sm font-medium">
                    <div className="flex space-x-2">
                      <button className="text-indigo-600 hover:text-indigo-900">
                        <EyeIcon className="h-4 w-4" />
                      </button>
                      <button className="text-green-600 hover:text-green-900" onClick={() => handleEmployeeSettlement(employee.id)}>
                        <CurrencyDollarIcon className="h-4 w-4" />
                      </button>
                      <button className="text-red-600 hover:text-red-900" onClick={() => handleDeleteEmployee(employee.id)}>
                        <TrashIcon className="h-4 w-4" />
                      </button>
                    </div>
                  </td>
                </tr>
              ))}
            </tbody>
          </table>
        </div>
      </div>
    </div>
  );

  const renderBilling = () => (
    <div className="space-y-4">
      {billing.map((bill) => (
        <div key={bill.id} className="p-4 border border-gray-200 rounded-lg">
          <div className="flex items-center justify-between">
            <div className="flex-1">
              <h4 className="text-sm font-medium text-gray-900">
                {bill.enterprise_name}
              </h4>
              <p className="text-sm text-gray-500">
                账单期间: {bill.period}
              </p>
              <p className="text-xs text-gray-400">
                通话次数: {bill.total_calls} | 总时长: {Math.floor(bill.total_duration / 60)}分钟
              </p>
              <p className="text-sm font-medium text-gray-900 mt-1">
                金额: ¥{bill.total_amount.toFixed(2)}
              </p>
              <p className="text-xs text-gray-400">
                到期日期: {formatTime(bill.due_date)}
                {bill.paid_date && ` | 付款日期: ${formatTime(bill.paid_date)}`}
              </p>
            </div>
            <div className="flex items-center space-x-4">
              <span className={`inline-flex items-center px-2.5 py-0.5 rounded-full text-xs font-medium ${getStatusColor(bill.status)}`}>
                {getStatusText(bill.status)}
              </span>
              <div className="flex space-x-2">
                <button className="text-blue-600 hover:text-blue-900">
                  <EyeIcon className="h-4 w-4" />
                </button>
              </div>
            </div>
          </div>
        </div>
      ))}
    </div>
  );

  return (
    <Layout>
      <Head>
        <title>企业服务 - 口译服务管理后台</title>
      </Head>

      <div className="max-w-7xl mx-auto py-6 sm:px-6 lg:px-8">
        <div className="px-4 py-6 sm:px-0">
          {/* 页面标题 */}
          <div className="flex items-center justify-between mb-6">
            <h1 className="text-2xl font-bold text-gray-900">企业服务管理</h1>
            <button className="inline-flex items-center px-4 py-2 border border-transparent text-sm font-medium rounded-md text-white bg-blue-600 hover:bg-blue-700">
              <PlusIcon className="h-4 w-4 mr-2" />
              {filters.tab === 'contracts' ? '新增合同' : filters.tab === 'employees' ? '添加员工' : '生成账单'}
            </button>
          </div>

          {/* 标签页 */}
          <div className="mb-6">
            <nav className="flex space-x-8">
              <button
                onClick={() => handleFilterChange('tab', 'contracts')}
                className={`${
                  filters.tab === 'contracts'
                    ? 'border-blue-500 text-blue-600'
                    : 'border-transparent text-gray-500 hover:text-gray-700 hover:border-gray-300'
                } whitespace-nowrap py-2 px-1 border-b-2 font-medium text-sm`}
              >
                <BuildingOfficeIcon className="h-5 w-5 inline mr-2" />
                企业合同
              </button>
              <button
                onClick={() => handleFilterChange('tab', 'employees')}
                className={`${
                  filters.tab === 'employees'
                    ? 'border-blue-500 text-blue-600'
                    : 'border-transparent text-gray-500 hover:text-gray-700 hover:border-gray-300'
                } whitespace-nowrap py-2 px-1 border-b-2 font-medium text-sm`}
              >
                <UsersIcon className="h-5 w-5 inline mr-2" />
                企业员工
              </button>
              <button
                onClick={() => handleFilterChange('tab', 'billing')}
                className={`${
                  filters.tab === 'billing'
                    ? 'border-blue-500 text-blue-600'
                    : 'border-transparent text-gray-500 hover:text-gray-700 hover:border-gray-300'
                } whitespace-nowrap py-2 px-1 border-b-2 font-medium text-sm`}
              >
                <CurrencyDollarIcon className="h-5 w-5 inline mr-2" />
                结算记录
              </button>
            </nav>
          </div>

          {/* 搜索和筛选 */}
          <div className="bg-white shadow rounded-lg mb-6">
            <div className="px-4 py-5 sm:p-6">
              <div className="grid grid-cols-1 gap-4 sm:grid-cols-2 lg:grid-cols-4">
                {/* 搜索框 */}
                <div className="lg:col-span-2">
                  <div className="relative">
                    <div className="absolute inset-y-0 left-0 pl-3 flex items-center pointer-events-none">
                      <MagnifyingGlassIcon className="h-5 w-5 text-gray-400" />
                    </div>
                    <input
                      type="text"
                      placeholder="搜索企业名称、合同编号或员工姓名..."
                      value={filters.search}
                      onChange={(e) => handleFilterChange('search', e.target.value)}
                      className="block w-full pl-10 pr-3 py-2 border border-gray-300 rounded-md leading-5 bg-white placeholder-gray-500 focus:outline-none focus:placeholder-gray-400 focus:ring-1 focus:ring-blue-500 focus:border-blue-500"
                    />
                  </div>
                </div>

                {/* 状态筛选 */}
                <div>
                  <select
                    value={filters.status}
                    onChange={(e) => handleFilterChange('status', e.target.value)}
                    className="block w-full px-3 py-2 border border-gray-300 rounded-md bg-white focus:outline-none focus:ring-1 focus:ring-blue-500 focus:border-blue-500"
                  >
                    <option value="all">全部状态</option>
                    {filters.tab === 'contracts' && (
                      <>
                        <option value="active">活跃</option>
                        <option value="expired">已过期</option>
                        <option value="terminated">已终止</option>
                      </>
                    )}
                    {filters.tab === 'employees' && (
                      <>
                        <option value="active">活跃</option>
                        <option value="inactive">非活跃</option>
                      </>
                    )}
                    {filters.tab === 'billing' && (
                      <>
                        <option value="pending">待付款</option>
                        <option value="paid">已付款</option>
                        <option value="overdue">逾期</option>
                      </>
                    )}
                  </select>
                </div>

                {/* 排序 */}
                <div>
                  <select
                    value={`${filters.sortBy}-${filters.sortOrder}`}
                    onChange={(e) => {
                      const [sortBy, sortOrder] = e.target.value.split('-');
                      handleFilterChange('sortBy', sortBy);
                      handleFilterChange('sortOrder', sortOrder);
                    }}
                    className="block w-full px-3 py-2 border border-gray-300 rounded-md bg-white focus:outline-none focus:ring-1 focus:ring-blue-500 focus:border-blue-500"
                  >
                    <option value="created_at-desc">创建时间 (新到旧)</option>
                    <option value="created_at-asc">创建时间 (旧到新)</option>
                    <option value="name-asc">名称 (A-Z)</option>
                    <option value="name-desc">名称 (Z-A)</option>
                    {filters.tab !== 'contracts' && (
                      <>
                        <option value="amount-desc">金额 (高到低)</option>
                        <option value="amount-asc">金额 (低到高)</option>
                      </>
                    )}
                  </select>
                </div>
              </div>

              <div className="mt-4 flex space-x-3">
                <button
                  onClick={applyFilters}
                  className="inline-flex items-center px-4 py-2 border border-transparent text-sm font-medium rounded-md text-white bg-blue-600 hover:bg-blue-700"
                >
                  应用筛选
                </button>
                <button
                  onClick={resetFilters}
                  className="inline-flex items-center px-4 py-2 border border-gray-300 text-sm font-medium rounded-md text-gray-700 bg-white hover:bg-gray-50"
                >
                  重置
                </button>
              </div>
            </div>
          </div>

          {/* 内容区域 */}
          {loading ? (
            <div className="flex items-center justify-center py-12">
              <div className="loading-spinner"></div>
            </div>
          ) : (
            <div className="bg-white shadow overflow-hidden sm:rounded-md">
              <div className="px-4 py-5 sm:p-6">
                <div className="flex items-center justify-between mb-4">
                  <h3 className="text-lg leading-6 font-medium text-gray-900">
                    {filters.tab === 'contracts' ? '企业合同' : filters.tab === 'employees' ? '企业员工' : '结算记录'} ({totalCount} 条记录)
                  </h3>
                </div>

                {filters.tab === 'contracts' && renderContracts()}
                {filters.tab === 'employees' && renderEmployees()}
                {filters.tab === 'billing' && renderBilling()}

                {/* 分页 */}
                {totalPages > 1 && (
                  <div className="mt-6 flex items-center justify-between">
                    <div className="flex-1 flex justify-between sm:hidden">
                      <button
                        onClick={() => fetchEnterpriseData(currentPage - 1)}
                        disabled={currentPage === 1}
                        className="relative inline-flex items-center px-4 py-2 border border-gray-300 text-sm font-medium rounded-md text-gray-700 bg-white hover:bg-gray-50 disabled:opacity-50"
                      >
                        上一页
                      </button>
                      <button
                        onClick={() => fetchEnterpriseData(currentPage + 1)}
                        disabled={currentPage === totalPages}
                        className="ml-3 relative inline-flex items-center px-4 py-2 border border-gray-300 text-sm font-medium rounded-md text-gray-700 bg-white hover:bg-gray-50 disabled:opacity-50"
                      >
                        下一页
                      </button>
                    </div>
                    <div className="hidden sm:flex-1 sm:flex sm:items-center sm:justify-between">
                      <div>
                        <p className="text-sm text-gray-700">
                          显示第 <span className="font-medium">{(currentPage - 1) * pageSize + 1}</span> 到{' '}
                          <span className="font-medium">
                            {Math.min(currentPage * pageSize, totalCount)}
                          </span>{' '}
                          条，共 <span className="font-medium">{totalCount}</span> 条记录
                        </p>
                      </div>
                      <div>
                        <nav className="relative z-0 inline-flex rounded-md shadow-sm -space-x-px">
                          <button
                            onClick={() => fetchEnterpriseData(currentPage - 1)}
                            disabled={currentPage === 1}
                            className="relative inline-flex items-center px-2 py-2 rounded-l-md border border-gray-300 bg-white text-sm font-medium text-gray-500 hover:bg-gray-50 disabled:opacity-50"
                          >
                            <ChevronLeftIcon className="h-5 w-5" />
                          </button>
                          {[...Array(Math.min(totalPages, 5))].map((_, i) => {
                            const page = i + 1;
                            return (
                              <button
                                key={page}
                                onClick={() => fetchEnterpriseData(page)}
                                className={`relative inline-flex items-center px-4 py-2 border text-sm font-medium ${
                                  page === currentPage
                                    ? 'z-10 bg-blue-50 border-blue-500 text-blue-600'
                                    : 'bg-white border-gray-300 text-gray-500 hover:bg-gray-50'
                                }`}
                              >
                                {page}
                              </button>
                            );
                          })}
                          <button
                            onClick={() => fetchEnterpriseData(currentPage + 1)}
                            disabled={currentPage === totalPages}
                            className="relative inline-flex items-center px-2 py-2 rounded-r-md border border-gray-300 bg-white text-sm font-medium text-gray-500 hover:bg-gray-50 disabled:opacity-50"
                          >
                            <ChevronRightIcon className="h-5 w-5" />
                          </button>
                        </nav>
                      </div>
                    </div>
                  </div>
                )}
              </div>
            </div>
          )}
        </div>
      </div>
    </Layout>
  );
}