/**
 * Admin Layout with Sidebar
 */
import { useState, useEffect } from 'react';
import { Outlet, useNavigate, useLocation } from 'react-router-dom';
import { Layout, Menu, Avatar, Dropdown } from 'antd';
import {
  MenuFoldOutlined,
  MenuUnfoldOutlined,
  DashboardOutlined,
  DatabaseOutlined,
  DownloadOutlined,
  UserOutlined,
  LogoutOutlined,
  RocketOutlined,
  AppstoreOutlined,
  SettingOutlined,
  TeamOutlined,
  ControlOutlined,
  LockOutlined,
  IdcardOutlined,
  StarOutlined,
} from '@ant-design/icons';
import type { MenuProps } from 'antd';
import { authAPI } from '../../utils/request';
import { auth } from '../../utils/auth';
import { useToast } from '../../contexts/ToastContext';

const { Header, Sider, Content } = Layout;

// Icon mapping
const iconMap: Record<string, any> = {
  dashboard: <DashboardOutlined />,
  database: <DatabaseOutlined />,
  planet: <RocketOutlined />,
  data: <DatabaseOutlined />,
  download: <DownloadOutlined />,
  settings: <SettingOutlined />,
  users: <TeamOutlined />,
  sliders: <ControlOutlined />,
  profile: <IdcardOutlined />,
  star: <StarOutlined />,
};

export function AdminLayout() {
  const [collapsed, setCollapsed] = useState(false);
  const [menus, setMenus] = useState<any[]>([]);
  const [loading, setLoading] = useState(true);
  const navigate = useNavigate();
  const location = useLocation();
  const user = auth.getUser();
  const toast = useToast();

  // Load menus from backend
  useEffect(() => {
    loadMenus();
  }, []);

  // Redirect to first menu if on root path
  useEffect(() => {
    if (menus.length > 0 && (location.pathname === '/admin' || location.pathname === '/user')) {
      const firstMenu = menus[0];
      if (firstMenu.path) {
        navigate(firstMenu.path, { replace: true });
      }
    }
  }, [menus, location.pathname, navigate]);

  const loadMenus = async () => {
    try {
      const { data } = await authAPI.getMenus();
      setMenus(data);
    } catch (error) {
      toast.error('加载菜单失败');
    } finally {
      setLoading(false);
    }
  };

  // Convert backend menu to Ant Design menu format
  const convertMenus = (menus: any[], isChild = false): MenuProps['items'] => {
    return menus.map((menu) => {
      const item: any = {
        key: menu.path || menu.name,
        icon: isChild ? null : (iconMap[menu.icon || ''] || null),
        label: menu.title,
      };

      if (menu.children && menu.children.length > 0) {
        item.children = convertMenus(menu.children, true);
      }

      return item;
    });
  };

  const handleMenuClick: MenuProps['onClick'] = ({ key }) => {
    navigate(key);
  };

  const handleLogout = async () => {
    try {
      await authAPI.logout();
      auth.logout();
      toast.success('登出成功');
      navigate('/login');
    } catch (error) {
      // Even if API fails, clear local auth
      auth.logout();
      navigate('/login');
    }
  };

  const userMenuItems: MenuProps['items'] = [
    {
      key: 'change-password',
      icon: <LockOutlined />,
      label: '修改密码',
      onClick: () => navigate('/admin/change-password'),
    },
    {
      type: 'divider',
    },
    {
      key: 'logout',
      icon: <LogoutOutlined />,
      label: '退出登录',
      onClick: handleLogout,
    },
  ];

  return (
    <Layout style={{ minHeight: '100vh' }}>
      <Sider trigger={null} collapsible collapsed={collapsed}>
        <div
          style={{
            height: 64,
            display: 'flex',
            alignItems: 'center',
            justifyContent: 'center',
            fontSize: 20,
            fontWeight: 'bold',
            color: '#fff',
          }}
        >
          {collapsed ? '🌌' : '🌌 COSMO'}
        </div>
        <Menu
          theme="dark"
          mode="inline"
          selectedKeys={[location.pathname]}
          items={convertMenus(menus)}
          onClick={handleMenuClick}
        />
      </Sider>
      <Layout>
        <Header
          style={{
            padding: '0 16px',
            background: '#fff',
            display: 'flex',
            alignItems: 'center',
            justifyContent: 'space-between',
          }}
        >
          <div
            onClick={() => setCollapsed(!collapsed)}
            style={{ fontSize: 18, cursor: 'pointer' }}
          >
            {collapsed ? <MenuUnfoldOutlined /> : <MenuFoldOutlined />}
          </div>

          <Dropdown menu={{ items: userMenuItems }} placement="bottomRight">
            <div style={{ display: 'flex', alignItems: 'center', cursor: 'pointer' }}>
              <Avatar icon={<UserOutlined />} style={{ marginRight: 8 }} />
              <span>{user?.username || 'User'}</span>
            </div>
          </Dropdown>
        </Header>
        <Content
          style={{
            margin: '16px',
            padding: 24,
            background: '#fff',
            minHeight: 280,
            overflow: 'auto',
            maxHeight: 'calc(100vh - 64px - 32px)',
          }}
        >
          <Outlet />
        </Content>
      </Layout>
    </Layout>
  );
}