import { useEffect, useMemo, useState } from 'react';
import {
  Avatar,
  Button,
  Dropdown,
  Layout,
  Menu,
  Space,
  Typography,
} from '@arco-design/web-react';
import { IconMenuFold, IconMenuUnfold } from '@arco-design/web-react/icon';
import { Navigate, Route, Routes, useLocation, useNavigate } from 'react-router-dom';
import type { ApiResponse, AdminProfile } from '../api/types';
import { API_BASE_URL, TOKEN_KEY, api } from '../api/client';
import { filterMenuItems, findCurrentMenu, menuItems, renderMenuItem } from './menu';
import { PermissionRoute } from './PermissionRoute';
import DashboardPage from '../Dashboard';
import DramasPage from '../Drama';
import DataPage from '../Data';
import UsersPage from '../User';
import RolesPage from '../Role';
import PersonnelPage from '../Personnel';
import ProfilePage from '../Profile';
import LogsPage from '../Log';
import './layout.css';

const { Header, Sider, Content } = Layout;
const { Text } = Typography;

export function AdminLayout() {
  const navigate = useNavigate();
  const location = useLocation();
  const [collapsed, setCollapsed] = useState(false);
  const [profile, setProfile] = useState<AdminProfile | null>(null);
  const current = useMemo(() => findCurrentMenu(location.pathname), [location.pathname]);
  const visibleMenuItems = useMemo(() => filterMenuItems(menuItems, profile), [profile]);
  const [openMenuKeys, setOpenMenuKeys] = useState<string[]>(current?.parent ? [current.parent.key] : []);

  useEffect(() => {
    api.get<ApiResponse<AdminProfile>>('/api/admin/v1/auth/profile')
      .then((response) => setProfile(response.data.data))
      .catch(() => {
        localStorage.removeItem(TOKEN_KEY);
        navigate('/login', { replace: true });
      });
  }, [navigate]);

  useEffect(() => {
    if (current?.parent && !openMenuKeys.includes(current.parent.key)) {
      setOpenMenuKeys((keys) => [...keys, current.parent!.key]);
    }
  }, [current, openMenuKeys]);

  const logout = () => {
    localStorage.removeItem(TOKEN_KEY);
    navigate('/login', { replace: true });
  };

  return (
    <Layout className="layout">
      <Sider className="sidebar" width={220} collapsed={collapsed} collapsible trigger={null}>
        <div className="logo-row">
          <span className="logo-mark">TK</span>
          {!collapsed && <span>TK短剧管理后台</span>}
        </div>
        <Menu
          selectedKeys={[current?.item.key || '/dashboard']}
          openKeys={openMenuKeys}
          onClickMenuItem={(key) => navigate(key)}
          onClickSubMenu={(_, openKeys) => setOpenMenuKeys(openKeys)}
        >
          {visibleMenuItems.map((item) => renderMenuItem(item))}
        </Menu>
      </Sider>
      <Layout>
        <Header className="header">
          <Space>
            <Button icon={collapsed ? <IconMenuUnfold /> : <IconMenuFold />} onClick={() => setCollapsed(!collapsed)} />
            <div className="header-title">
              <strong>{current?.item.label || '工作台'}</strong>
              <span>后端 API： {API_BASE_URL}</span>
            </div>
          </Space>
          <Dropdown
            position="br"
            trigger="click"
            droplist={(
              <Menu>
                <Menu.Item key="profile" onClick={() => navigate('/profile')}>个人中心</Menu.Item>
                <Menu.Item key="logout" onClick={logout}>退出登录</Menu.Item>
              </Menu>
            )}
          >
            <button className="user-menu-trigger" type="button">
              <Avatar size={28}>{profile?.username?.slice(0, 1).toUpperCase() || 'A'}</Avatar>
              <Text>{profile?.nickname || profile?.username || '管理员'}</Text>
            </button>
          </Dropdown>
        </Header>
        <Content className="content">
          <Routes>
            <Route path="/dashboard" element={<DashboardPage profile={profile} />} />
            <Route path="/dramas" element={<PermissionRoute profile={profile} requiredPermissions={['drama:read']}><DramasPage /></PermissionRoute>} />
            <Route path="/dramas/:id" element={<PermissionRoute profile={profile} requiredPermissions={['drama:read']}><DramasPage /></PermissionRoute>} />
            <Route path="/data" element={<PermissionRoute profile={profile} requiredPermissions={['data:read']}><DataPage /></PermissionRoute>} />
            <Route path="/users" element={<PermissionRoute profile={profile} requiredPermissions={['user:read']}><UsersPage /></PermissionRoute>} />
            <Route path="/roles" element={<PermissionRoute profile={profile} requiredPermissions={['role:read']}><RolesPage /></PermissionRoute>} />
            <Route path="/personnel" element={<PermissionRoute profile={profile} requiredPermissions={['admin-user:read']}><PersonnelPage /></PermissionRoute>} />
            <Route path="/profile" element={<PermissionRoute profile={profile}><ProfilePage /></PermissionRoute>} />
            <Route path="/logs" element={<PermissionRoute profile={profile} requiredPermissions={['log:read']}><LogsPage /></PermissionRoute>} />
            <Route path="*" element={<Navigate to="/dashboard" replace />} />
          </Routes>
        </Content>
      </Layout>
    </Layout>
  );
}