motor-de-encuestas/middleware.ts

import { createServerClient } from '@supabase/ssr'
import { NextRequest, NextResponse } from 'next/server'

export async function middleware(request: NextRequest) {
  let supabaseResponse = NextResponse.next({ request })

  const supabase = createServerClient(
    process.env.NEXT_PUBLIC_SUPABASE_URL!,
    process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY!,
    {
      cookies: {
        getAll() {
          return request.cookies.getAll()
        },
        setAll(cookiesToSet) {
          cookiesToSet.forEach(({ name, value }) =>
            request.cookies.set(name, value)
          )
          supabaseResponse = NextResponse.next({ request })
          cookiesToSet.forEach(({ name, value, options }) =>
            supabaseResponse.cookies.set(name, value, options)
          )
        },
      },
    }
  )

  // getUser() valida el token contra el servidor — no confiar solo en la cookie local
  const {
    data: { user },
  } = await supabase.auth.getUser()

  if (!user) {
    const loginUrl = new URL('/login', request.url)
    return NextResponse.redirect(loginUrl)
  }

  return supabaseResponse
}

export const config = {
  matcher: ['/admin/:path*', '/dashboard/:path*'],
}