import React, { useState, useEffect, Suspense, lazy } from 'react';
import {
  Layout,
  Menu,
  theme,
  Button,
  Dropdown,
  Avatar,
  message,
  Space,
  Divider,
  ConfigProvider as AntdConfigProvider,
} from 'antd';
import {
  BarChartOutlined,
  DatabaseOutlined,
  CloudServerOutlined,
  MenuUnfoldOutlined,
  MenuFoldOutlined,
  EyeOutlined,
  BuildOutlined,
  HomeOutlined,
  ShoppingCartOutlined,
  InboxOutlined,
  ImportOutlined,
  FileTextOutlined,
  UserOutlined,
  LogoutOutlined,
  HistoryOutlined,
  AuditOutlined,
  ToolOutlined,
  ScheduleOutlined,
  SettingOutlined,
  ApiOutlined,
  PartitionOutlined,
  CodepenOutlined,
  CloudUploadOutlined,
} from '@ant-design/icons';
import {
  BrowserRouter as Router,
  Routes,
  Route,
  Link,
  Navigate,
  useLocation,
  useNavigate,
} from 'react-router-dom';
import { useAuth } from './context/AuthContext';
import { ConfigProvider, useConfig } from './context/ConfigContext';
import { Scene3DProvider } from './context/Scene3DContext';
import { useDesignTokens } from './hooks/useDesignTokens';
import useIdleTimeout from './hooks/useIdleTimeout';
import { SWRConfig, swrConfig } from './hooks/useSWR';
import axios from 'axios';
import { Spin } from 'antd';
import ErrorBoundary from './components/ErrorBoundary';

const Dashboard = lazy(() => import('./pages/Dashboard'));
const DeviceManagement = lazy(() => import('./pages/DeviceManagement'));
const RackManagement = lazy(() => import('./pages/RackManagement'));
const RoomManagement = lazy(() => import('./pages/RoomManagement'));
const DeviceFieldManagement = lazy(() => import('./pages/DeviceFieldManagement'));
const Rack3DVisualization = lazy(() => import('./pages/Rack3DVisualization'));
const ConsumableManagement = lazy(() => import('./pages/ConsumableManagement'));
const ConsumableStatistics = lazy(() => import('./pages/ConsumableStatistics'));
const ConsumableLogs = lazy(() => import('./pages/ConsumableLogs'));
const CategoryManagement = lazy(() => import('./pages/CategoryManagement'));
const UserManagement = lazy(() => import('./pages/UserManagement'));
const Login = lazy(() => import('./pages/Login'));
const TicketManagement = lazy(() => import('./pages/TicketManagement'));
const TicketCategoryManagement = lazy(() => import('./pages/TicketCategoryManagement'));
const TicketStatistics = lazy(() => import('./pages/TicketStatistics'));
const SystemSettings = lazy(() => import('./pages/SystemSettings'));
const CableManagement = lazy(() => import('./pages/CableManagement'));
const PortManagement = lazy(() => import('./pages/PortManagement'));
const InventoryManagement = lazy(() => import('./pages/InventoryManagement'));
const InventoryTaskExecution = lazy(() => import('./pages/InventoryTaskExecution'));
const PendingDeviceManagement = lazy(() => import('./pages/PendingDeviceManagement'));
const BackupManagement = lazy(() => import('./pages/BackupManagement'));
const AutoBackupSettings = lazy(() => import('./pages/AutoBackupSettings'));
const RemoteBackupSettings = lazy(() => import('./pages/RemoteBackupSettings'));
const OperationLogs = lazy(() => import('./pages/OperationLogs'));
const ErrorBoundaryTest = lazy(() => import('./pages/ErrorBoundaryTest'));
const IdleDeviceManagement = lazy(() => import('./pages/IdleDeviceManagement'));

const { Header, Content, Sider } = Layout;

const PageLoading = () => (
  <div
    style={{
      display: 'flex',
      flexDirection: 'column',
      justifyContent: 'center',
      alignItems: 'center',
      height: '100vh',
      background: '#f5f5f5',
      gap: '16px',
    }}
  >
    <Spin size="large" />
    <span style={{ color: '#8c8c8c', fontSize: '14px' }}>正在加载页面...</span>
  </div>
);

const AuthLoading = () => (
  <div
    style={{
      display: 'flex',
      flexDirection: 'column',
      justifyContent: 'center',
      alignItems: 'center',
      height: '100vh',
      background: '#f5f5f5',
      gap: '16px',
    }}
  >
    <Spin size="large" />
    <span style={{ color: '#8c8c8c', fontSize: '14px' }}>正在加载认证状态...</span>
  </div>
);

const PrivateRoute = ({ children }) => {
  const { token, initialized, loading } = useAuth();
  const location = useLocation();

  if (!initialized) {
    return <AuthLoading />;
  }

  if (!token) {
    return <Navigate to="/login" state={{ from: location }} replace />;
  }

  return <AppLayout>{children}</AppLayout>;
};

const ProtectedRoute = ({ component: Component }) => (
  <PrivateRoute>
    <Component />
  </PrivateRoute>
);

// 默认空闲超时配置
const DEFAULT_IDLE_CONFIG = {
  timeout: 30 * 60 * 1000, // 30分钟
  warningTime: 60 * 1000, // 60秒
};

const AppLayout = ({ children }) => {
  const [collapsed, setCollapsed] = useState(false);
  const [activeKey, setActiveKey] = useState('dashboard');
  const [idleConfig, setIdleConfig] = useState(DEFAULT_IDLE_CONFIG);
  const { user, logout } = useAuth();
  const { config } = useConfig();
  const navigate = useNavigate();
  const location = useLocation();
  const designTokens = useDesignTokens();

  // 获取空闲超时配置
  useEffect(() => {
    const fetchIdleConfig = async () => {
      try {
        const response = await axios.get('/api/system-settings/idle-timeout');
        setIdleConfig({
          timeout: response.data.timeout,
          warningTime: response.data.warningTime,
        });
      } catch (error) {
        console.warn('获取空闲超时配置失败，使用默认配置:', error);
      }
    };

    fetchIdleConfig();
  }, []);

  // 启用空闲超时检测
  useIdleTimeout({
    timeout: idleConfig.timeout,
    warningTime: idleConfig.warningTime,
    onLogout: logout,
    enabled: true,
  });

  const handleLogout = () => {
    logout();
    message.success('已退出登录');
    navigate('/login');
  };

  const getSelectedKey = () => {
    const path = location.pathname;
    if (path === '/') return 'dashboard';
    if (path.startsWith('/visualization-3d')) return 'visualization-3d';
    if (path.startsWith('/rooms') || path.startsWith('/racks')) return 'room-management';
    if (
      path.startsWith('/devices') ||
      path.startsWith('/fields') ||
      path.startsWith('/cables') ||
      path.startsWith('/ports') ||
      path.startsWith('/idle-devices')
    )
      return 'asset-management';
    if (path.startsWith('/consumables')) return 'consumables-management';
    if (
      path.startsWith('/users') ||
      path.startsWith('/login-history') ||
      path.startsWith('/operation-logs') ||
      path.startsWith('/settings') ||
      path.startsWith('/backup')
    )
      return 'system-management';
    if (path.startsWith('/tickets')) return 'ticket-management';
    if (path.startsWith('/inventory') || path.startsWith('/pending-devices'))
      return 'inventory-management';
    return 'dashboard';
  };

  const menuItems = [
    {
      key: 'dashboard',
      icon: <BarChartOutlined style={{ fontSize: '18px' }} />,
      label: <Link to="/">仪表盘</Link>,
    },
    {
      key: 'room-management',
      icon: <HomeOutlined style={{ fontSize: '18px' }} />,
      label: '机房管理',
      children: [
        {
          key: 'rooms',
          icon: <HomeOutlined style={{ fontSize: '16px' }} />,
          label: <Link to="/rooms">机房管理</Link>,
        },
        {
          key: 'racks',
          icon: <DatabaseOutlined style={{ fontSize: '16px' }} />,
          label: <Link to="/racks">机柜管理</Link>,
        },
        {
          key: 'visualization-3d',
          icon: <CodepenOutlined style={{ fontSize: '16px' }} />,
          label: <Link to="/visualization-3d">3D机柜可视化</Link>,
        },
      ],
    },
    {
      key: 'asset-management',
      icon: <BuildOutlined style={{ fontSize: '18px' }} />,
      label: '资产管理',
      children: [
        {
          key: 'devices',
          icon: <CloudServerOutlined style={{ fontSize: '16px' }} />,
          label: <Link to="/devices">设备管理</Link>,
        },
        {
          key: 'idle-devices',
          icon: <CloudServerOutlined style={{ fontSize: '16px' }} />,
          label: <Link to="/idle-devices">空闲设备</Link>,
        },
        {
          key: 'fields',
          icon: <DatabaseOutlined style={{ fontSize: '16px' }} />,
          label: <Link to="/fields">字段管理</Link>,
        },
        {
          key: 'ports',
          icon: <PartitionOutlined style={{ fontSize: '16px' }} />,
          label: <Link to="/ports">端口管理</Link>,
        },
        {
          key: 'cables',
          icon: <ApiOutlined style={{ fontSize: '16px' }} />,
          label: <Link to="/cables">接线管理</Link>,
        },
      ],
    },
    {
      key: 'consumables-management',
      icon: <ShoppingCartOutlined style={{ fontSize: '18px' }} />,
      label: '耗材管理',
      children: [
        {
          key: 'consumables-stats',
          icon: <BarChartOutlined style={{ fontSize: '16px' }} />,
          label: <Link to="/consumables-stats">耗材统计</Link>,
        },
        {
          key: 'consumables',
          icon: <DatabaseOutlined style={{ fontSize: '16px' }} />,
          label: <Link to="/consumables">耗材列表</Link>,
        },
        {
          key: 'consumables-categories',
          icon: <ImportOutlined style={{ fontSize: '16px' }} />,
          label: <Link to="/consumables-categories">分类管理</Link>,
        },
        {
          key: 'consumables-logs',
          icon: <FileTextOutlined style={{ fontSize: '16px' }} />,
          label: <Link to="/consumables-logs">操作日志</Link>,
        },
      ],
    },
    {
      key: 'ticket-management',
      icon: <ToolOutlined style={{ fontSize: '18px' }} />,
      label: '工单管理',
      children: [
        {
          key: 'tickets',
          icon: <ScheduleOutlined style={{ fontSize: '16px' }} />,
          label: <Link to="/tickets">工单列表</Link>,
        },
        {
          key: 'ticket-categories',
          icon: <InboxOutlined style={{ fontSize: '16px' }} />,
          label: <Link to="/ticket-categories">故障分类</Link>,
        },
        {
          key: 'ticket-statistics',
          icon: <BarChartOutlined style={{ fontSize: '16px' }} />,
          label: <Link to="/ticket-statistics">统计报表</Link>,
        },
      ],
    },
    {
      key: 'inventory-management',
      icon: <InboxOutlined style={{ fontSize: '18px' }} />,
      label: '资产盘点',
      children: [
        {
          key: 'inventory',
          icon: <InboxOutlined style={{ fontSize: '16px' }} />,
          label: <Link to="/inventory">盘点计划</Link>,
        },
        {
          key: 'pending-devices',
          icon: <CloudUploadOutlined style={{ fontSize: '16px' }} />,
          label: <Link to="/pending-devices">盘盈设备</Link>,
        },
      ],
    },
    {
      key: 'system-management',
      icon: <UserOutlined style={{ fontSize: '18px' }} />,
      label: '系统管理',
      children: [
        {
          key: 'users',
          icon: <UserOutlined style={{ fontSize: '16px' }} />,
          label: <Link to="/users">用户管理</Link>,
        },
        {
          key: 'system-settings',
          icon: <SettingOutlined style={{ fontSize: '16px' }} />,
          label: <Link to="/settings">系统设置</Link>,
        },
        {
          key: 'backup',
          icon: <DatabaseOutlined style={{ fontSize: '16px' }} />,
          label: <Link to="/backup">数据备份</Link>,
        },
        {
          key: 'operation-logs',
          icon: <AuditOutlined style={{ fontSize: '16px' }} />,
          label: <Link to="/operation-logs">操作日志</Link>,
        },
      ],
    },
  ];

  return (
    <Layout style={{ minHeight: '100vh' }}>
      <Sider
        width={240}
        collapsedWidth={72}
        collapsed={collapsed}
        style={{
          background: designTokens.colors.sidebar.bg,
          boxShadow: '2px 0 8px rgba(0, 0, 0, 0.06)',
          borderRight: `1px solid ${designTokens.colors.sidebar.border}`,
          display: 'flex',
          flexDirection: 'column',
          position: 'fixed',
          left: 0,
          top: 0,
          bottom: 0,
          zIndex: 100,
        }}
      >
        <div
          style={{
            display: 'flex',
            alignItems: 'center',
            justifyContent: collapsed ? 'center' : 'flex-start',
            padding: collapsed ? '16px 0' : '16px 20px',
            borderBottom: `1px solid ${designTokens.colors.sidebar.border}`,
            minHeight: '64px',
            background: designTokens.colors.sidebar.bg,
          }}
        >
          <div
            style={{
              width: '36px',
              height: '36px',
              borderRadius: designTokens.borderRadius.small,
              background: designTokens.colors.primary.gradient,
              display: 'flex',
              alignItems: 'center',
              justifyContent: 'center',
              flexShrink: 0,
            }}
          >
            <CloudServerOutlined style={{ fontSize: '18px', color: '#ffffff' }} />
          </div>
          {!collapsed && (
            <div>
              <div
                style={{
                  fontSize: '15px',
                  fontWeight: '600',
                  color: designTokens.colors.primary.main,
                  lineHeight: 1.2,
                }}
              >
                {config.site_name || 'IDC管理'}
              </div>
              <div
                style={{
                  fontSize: '11px',
                  color: designTokens.colors.sidebar.text,
                  marginTop: '2px',
                }}
              >
                数据中心管理平台
              </div>
            </div>
          )}
        </div>

        <div
          style={{
            padding: collapsed ? '12px 0' : '12px 8px',
            overflowY: 'auto',
            flex: 1,
          }}
        >
          <Menu
            mode="inline"
            selectedKeys={[getSelectedKey()]}
            defaultOpenKeys={[]}
            style={{
              background: 'transparent',
              borderRight: 0,
              fontSize: '14px',
            }}
            items={menuItems}
          />
        </div>

        <div
          style={{
            padding: '12px',
            borderTop: `1px solid ${designTokens.colors.sidebar.border}`,
          }}
        >
          <Button
            type="text"
            icon={collapsed ? <MenuUnfoldOutlined /> : <MenuFoldOutlined />}
            onClick={() => setCollapsed(!collapsed)}
            style={{
              width: '100%',
              height: '40px',
              color: designTokens.colors.text.secondary,
              fontSize: '16px',
              borderRadius: designTokens.borderRadius.small,
              display: 'flex',
              alignItems: 'center',
              justifyContent: collapsed ? 'center' : 'flex-start',
              gap: '8px',
            }}
          >
            {!collapsed && (
              <span style={{ fontSize: '13px', color: designTokens.colors.text.secondary }}>
                收起菜单
              </span>
            )}
          </Button>
        </div>
      </Sider>

      <Layout
        style={{
          marginLeft: collapsed ? 72 : 240,
          transition: 'margin-left 0.2s ease',
        }}
      >
        <Header
          style={{
            padding: '0 24px',
            height: 64,
            background: designTokens.colors.background.primary,
            display: 'flex',
            justifyContent: 'flex-end',
            alignItems: 'center',
            boxShadow: designTokens.shadows.small,
            position: 'sticky',
            top: 0,
            zIndex: 99,
            overflow: 'visible',
          }}
        >
          {user && (
            <div
              style={{
                display: 'flex',
                alignItems: 'center',
                gap: '12px',
                height: '100%',
              }}
            >
              <div
                style={{
                  display: 'flex',
                  alignItems: 'center',
                  gap: '8px',
                  padding: '4px 12px',
                  background: designTokens.colors.background.secondary,
                  borderRadius: designTokens.borderRadius.medium,
                  height: '40px',
                  boxSizing: 'border-box',
                }}
              >
                <Avatar
                  style={{
                    backgroundColor: designTokens.colors.primary.main,
                    cursor: 'pointer',
                    width: 32,
                    height: 32,
                    display: 'flex',
                    alignItems: 'center',
                    justifyContent: 'center',
                  }}
                  icon={<UserOutlined style={{ fontSize: '14px' }} />}
                />
                <span
                  style={{
                    color: designTokens.colors.text.primary,
                    fontSize: 14,
                    fontWeight: 500,
                  }}
                >
                  {user.username}
                </span>
              </div>
              <Button
                type="text"
                danger
                icon={<LogoutOutlined />}
                onClick={handleLogout}
                className="logout-btn"
              >
                退出
              </Button>
            </div>
          )}
        </Header>
        <Content
          style={{
            padding: 24,
            margin: 0,
            minHeight: 'calc(100vh - 64px)',
            background: designTokens.colors.background.secondary,
          }}
        >
          {children}
        </Content>
      </Layout>
    </Layout>
  );
};

const routeConfig = [
  { path: '/', component: Dashboard },
  { path: '/devices', component: DeviceManagement },
  { path: '/racks', component: RackManagement },
  { path: '/rooms', component: RoomManagement },
  { path: '/fields', component: DeviceFieldManagement },
  { path: '/consumables', component: ConsumableManagement },
  { path: '/consumables-categories', component: CategoryManagement },
  { path: '/consumables-stats', component: ConsumableStatistics },
  { path: '/consumables-logs', component: ConsumableLogs },
  { path: '/users', component: UserManagement },
  { path: '/tickets', component: TicketManagement },
  { path: '/ticket-categories', component: TicketCategoryManagement },
  { path: '/ticket-statistics', component: TicketStatistics },
  { path: '/settings', component: SystemSettings },
  { path: '/cables', component: CableManagement },
  { path: '/inventory', component: InventoryManagement },
  { path: '/inventory/execution', component: InventoryTaskExecution },
  { path: '/pending-devices', component: PendingDeviceManagement },
  { path: '/ports', component: PortManagement },
  { path: '/backup', component: BackupManagement },
  { path: '/auto-backup-settings', component: AutoBackupSettings },
  { path: '/remote-backup-settings', component: RemoteBackupSettings },
  { path: '/operation-logs', component: OperationLogs },
  { path: '/error-boundary-test', component: ErrorBoundaryTest },
  { path: '/idle-devices', component: IdleDeviceManagement },
];

const ThemeConfig = () => {
  const designTokens = useDesignTokens();

  const renderRoute = (path, Component, needsErrorBoundary = true) => {
    const element = (
      <PrivateRoute>
        <Component />
      </PrivateRoute>
    );

    if (needsErrorBoundary) {
      return (
        <Route
          key={path}
          path={path}
          element={
            <ErrorBoundary
              fullPage={false}
              title="页面加载失败"
              subTitle="该页面在加载过程中遇到了错误，请尝试重新加载"
            >
              {element}
            </ErrorBoundary>
          }
        />
      );
    }

    return <Route key={path} path={path} element={element} />;
  };

  return (
    <AntdConfigProvider theme={{ token: designTokens }}>
      <SWRConfig value={swrConfig}>
        <Router>
          <Suspense fallback={<PageLoading />}>
            <Routes>
              <Route
                path="/login"
                element={
                  <ErrorBoundary fullPage>
                    <Login />
                  </ErrorBoundary>
                }
              />
              {routeConfig.map(({ path, component: Component }) => renderRoute(path, Component))}
              <Route
                path="/visualization-3d"
                element={
                  <PrivateRoute>
                    <ErrorBoundary
                      fullPage={false}
                      title="3D 可视化加载失败"
                      subTitle="3D 场景在加载过程中遇到错误，可能是浏览器不支持 WebGL 或模型文件加载失败"
                    >
                      <Scene3DProvider>
                        <Rack3DVisualization />
                      </Scene3DProvider>
                    </ErrorBoundary>
                  </PrivateRoute>
                }
              />
              <Route path="*" element={<Navigate to="/" replace />} />
            </Routes>
          </Suspense>
        </Router>
      </SWRConfig>
    </AntdConfigProvider>
  );
};

function App() {
  return (
    <ConfigProvider>
      <ThemeConfig />
    </ConfigProvider>
  );
}

export default App;