import { redirect } from 'next/navigation'
import { getSession } from '@/lib/session'
import Link from 'next/link'

export default async function AdminLayout({ children }: { children: React.ReactNode }) {
  const session = await getSession()
  if (!session || session.role !== 'admin') {
    redirect('/')
  }

  return (
    <div className="mx-auto max-w-3xl px-4 py-12">
      {/* Header */}
      <div className="mb-8">
        <div className="flex items-center gap-3 mb-6">
          <div
            className="w-9 h-9 rounded-xl flex items-center justify-center shrink-0"
            style={{ background: 'linear-gradient(135deg, #a78bfa, #7c3aed)' }}
          >
            <svg viewBox="0 0 20 20" fill="currentColor" className="w-4 h-4 text-white" aria-hidden="true">
              <path fillRule="evenodd" d="M8.34 1.804A1 1 0 019.32 1h1.36a1 1 0 01.98.804l.295 1.473c.497.144.971.342 1.416.587l1.25-.834a1 1 0 011.262.125l.962.962a1 1 0 01.125 1.262l-.834 1.25c.245.445.443.919.587 1.416l1.473.294a1 1 0 01.804.98v1.361a1 1 0 01-.804.98l-1.473.295a6.95 6.95 0 01-.587 1.416l.834 1.25a1 1 0 01-.125 1.262l-.962.962a1 1 0 01-1.262.125l-1.25-.834a6.953 6.953 0 01-1.416.587l-.294 1.473a1 1 0 01-.98.804H9.32a1 1 0 01-.98-.804l-.295-1.473a6.957 6.957 0 01-1.416-.587l-1.25.834a1 1 0 01-1.262-.125l-.962-.962a1 1 0 01-.125-1.262l.834-1.25a6.957 6.957 0 01-.587-1.416l-1.473-.294A1 1 0 011 10.68V9.32a1 1 0 01.804-.98l1.473-.295c.144-.497.342-.971.587-1.416l-.834-1.25a1 1 0 01.125-1.262l.962-.962A1 1 0 015.38 3.03l1.25.834a6.957 6.957 0 011.416-.587l.294-1.473zM10 13a3 3 0 100-6 3 3 0 000 6z" clipRule="evenodd" />
            </svg>
          </div>
          <div>
            <h1 className="text-xl font-bold text-white">Admin</h1>
            <p className="text-sm text-slate-400">Site management</p>
          </div>
        </div>

        {/* Tab nav */}
        <div className="flex items-center gap-1 rounded-xl border border-white/8 bg-white/2 p-1 w-fit">
          <AdminTabLink href="/admin" label="Users" exact />
          <AdminTabLink href="/admin/links" label="Links" />
        </div>
      </div>

      {children}
    </div>
  )
}

function AdminTabLink({ href, label, exact }: { href: string; label: string; exact?: boolean }) {
  // This is a server component but Next.js doesn't give us pathname here easily.
  // We use a client wrapper below.
  return <AdminTabLinkClient href={href} label={label} exact={exact} />
}

// Small client component just for active-state detection
import AdminTabLinkClient from './AdminTabLinkClient'