import { NextResponse } from 'next/server'
import type { NextRequest } from 'next/server'
import { locales, defaultLocale } from '@/lib/i18n/locales'

function hasLocale(pathname: string) {
  const first = pathname.split('/')[1]
  return (locales as readonly string[]).includes(first)
}

export default function proxy(request: NextRequest) {
  const { pathname } = request.nextUrl

  // Ignore next internals and assets
  if (
    pathname.startsWith('/_next') ||
    pathname.startsWith('/api') ||
    pathname.includes('.') // static files
  ) {
    return
  }

  // Add default locale if missing
  if (!hasLocale(pathname)) {
    const url = request.nextUrl.clone()
    url.pathname = `/${defaultLocale}${pathname}`
    return NextResponse.redirect(url)
  }
}

export const config = {
  matcher: ['/((?!_next|.*\..*).*)'],
}