middleware.ts

import { NextResponse } from 'next/server';
import type { NextRequest } from 'next/server';

export function middleware(request: NextRequest) {
  const response = NextResponse.next();
  
  // Add pathname to headers for layout detection
  response.headers.set('x-pathname', request.nextUrl.pathname);

  // CORS handling
  const origin = request.headers.get('origin');
  
  if (process.env.NODE_ENV === 'development') {
    response.headers.set('Access-Control-Allow-Origin', '*');
    response.headers.set('Access-Control-Allow-Methods', 'GET, POST, OPTIONS');
    response.headers.set('Access-Control-Allow-Headers', 'Content-Type, Authorization');
    return response;
  }

  const allowedOrigins = process.env.ALLOWED_ORIGINS?.split(',') || [];
  
  if (origin && allowedOrigins.includes(origin)) {
    response.headers.set('Access-Control-Allow-Origin', origin);
    response.headers.set('Access-Control-Allow-Methods', 'GET, POST, OPTIONS');
    response.headers.set('Access-Control-Allow-Headers', 'Content-Type, Authorization');
  }

  return response;
}

export const config = {
  matcher: [
    '/api/:path*',
    '/((?!_next/static|_next/image|favicon.ico).*)',
  ],
};