import { NextRequest, NextResponse } from 'next/server';
import { i18n } from './lib/i18nConfig';

const PUBLIC_FILE_REGEX = /\.(.*)$/;

export function middleware(request: NextRequest) {
  const locale = request.cookies.get('NEXT_LOCALE')?.value || i18n.defaultLocale;
  const { pathname } = request.nextUrl;

  // Skip internal Next.js paths and static files
  if (
    pathname.startsWith('/_next') ||
    pathname.startsWith('/api') ||
    PUBLIC_FILE_REGEX.test(pathname)
  ) {
    return;
  }

  // Check if there is any supported locale in the pathname
  const pathnameHasLocale = i18n.locales.some(
    (loc) => pathname.startsWith(`/${loc}/`) || pathname === `/${loc}`
  );

  if (pathnameHasLocale) {
    return NextResponse.next();
  }

  // Rewrite to include the default locale if no locale is present
  request.nextUrl.pathname = `/${locale}${pathname}`;
  return NextResponse.redirect(request.nextUrl);
}

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