nxtgauge-admin-solid/src/components/AdminShell.tsx

import { A, useLocation, useNavigate } from '@solidjs/router';
import { createSignal, onMount, type JSX } from 'solid-js';
import AdminSidebar from './AdminSidebar';
import { clearAdminSession, hasAdminSession } from '~/lib/admin-session';

export default function AdminShell(props: { children: JSX.Element }) {
  const location = useLocation();
  const navigate = useNavigate();
  const [checkedSession, setCheckedSession] = createSignal(false);
  const tabs = [
    { href: '/admin/runtime-roles', label: 'View Roles' },
    { href: '/admin/runtime-roles/new', label: 'Create Role' },
    { href: '/admin/role-ui-configs', label: 'Inspector' },
    { href: '/admin/onboarding-schemas', label: 'Onboarding' },
  ];

  const isTabActive = (href: string) => {
    if (href === '/admin/runtime-roles') {
      return location.pathname === href || (location.pathname.startsWith('/admin/runtime-roles/') && location.pathname !== '/admin/runtime-roles/new');
    }
    return location.pathname === href || location.pathname.startsWith(`${href}/`);
  };

  onMount(() => {
    if (!hasAdminSession()) {
      const from = encodeURIComponent(location.pathname + location.search);
      navigate(`/login?from=${from}`, { replace: true });
      return;
    }
    setCheckedSession(true);
  });

  const onLogout = () => {
    clearAdminSession();
    navigate('/login', { replace: true });
  };

  return (
    <div class="admin-root">
      <header class="admin-header">
        <div class="admin-header-inner">
          <div class="admin-brand">
            <img src="/nxtgauge-logo.png" alt="NXTGAUGE" />
            <div>
              <p class="admin-brand-kicker">Administration</p>
              <h1>NXTGAUGE Admin Panel</h1>
            </div>
          </div>
          <div class="admin-header-actions">
            <p class="admin-role-chip">Super Admin</p>
            <button class="btn" type="button" onClick={onLogout}>Logout</button>
          </div>
        </div>
      </header>

      {checkedSession() ? (
        <div class="shell">
          <AdminSidebar />
          <main class="main">
            <div class="admin-tab-wrap">
              <nav class="admin-tabs">
                {tabs.map((tab) => (
                  <A href={tab.href} class={`admin-tab ${isTabActive(tab.href) ? 'active' : ''}`}>
                    {tab.label}
                  </A>
                ))}
              </nav>
            </div>
            <div class="main-inner">{props.children}</div>
          </main>
        </div>
      ) : (
        <div class="shell">
          <main class="main">
            <div class="card">
              <p class="notice">Checking session...</p>
            </div>
          </main>
        </div>
      )}
    </div>
  );
}