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export function middleware(request: NextRequest) {
  const pathname = request.nextUrl.pathname
  const pathnameIsMissingLocale = ['en', 'fr', 'es'].every(
    (locale) => !pathname.startsWith(`/${locale}/`) && pathname !== `/${locale}`
  )

  // Redirect if there is no locale
  if (pathnameIsMissingLocale) {
    const locale = request.headers.get('accept-language')?.split(',')[0].split('-')[0] || 'en'

    // If the locale is 'en', don't add it to the URL
    if (locale === 'en') {
      return NextResponse.next()
    }

    return NextResponse.redirect(new URL(`/${locale}${pathname}`, request.url))
  }
}

export const config = {
  matcher: [
    // Skip all internal paths (_next)
    '/((?!_next).*)',
    // Optional: only run on root (/) URL
    // '/'
  ],
}