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

// List of supported locales
const locales = ['en', 'de']
const defaultLocale = 'en'

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

  // Skip middleware for static files and API routes
  if (
    pathname.startsWith('/_next') ||
    pathname.startsWith('/api/') ||
    pathname.startsWith('/media/') ||
    pathname.includes('.') // Skip files with extensions
  ) {
    return NextResponse.next()
  }

  // Check if pathname already has a locale
  const pathnameHasLocale = locales.some(
    (locale) => pathname.startsWith(`/${locale}/`) || pathname === `/${locale}`
  )

  if (pathnameHasLocale) {
    // Already has locale, continue
    return NextResponse.next()
  }

  // Add default locale to URL
  request.nextUrl.pathname = `/${defaultLocale}${pathname}`
  
  return NextResponse.redirect(request.nextUrl)
}

export const config = {
  matcher: [
    // Match all paths except static files and API routes
    '/((?!_next|api|media|favicon.ico|robots.txt|sitemap.xml).*)',
  ],
}