// app/api/create-checkout/route.js
import { cookies } from 'next/headers';

export async function POST() {
  const cookieStore = cookies();
  // If you're using Next.js 15+, use this instead:
  // const cookieStore = await cookies();
  
  const session = await stripe.checkout.sessions.create({
    line_items: [...],
    mode: 'payment',
    metadata: {
      insightly_visitor_id: cookieStore.get('insightly_visitor_id')?.value,
      insightly_session_id: cookieStore.get('insightly_session_id')?.value
    }
  });
  
  return new Response(JSON.stringify({ sessionId: session.id }), {
    status: 200,
    headers: { 'Content-Type': 'application/json' }
  });
}