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

const locales = ['tr', 'en']
const defaultLocale = 'tr'

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

  // Admin Auth Logic
  if (pathname.startsWith('/admin')) {
    const session = request.cookies.get('admin_session')?.value
    const secret = process.env.ADMIN_SECRET || 'secret'
    const isLoginPage = pathname === '/admin/login'

    if (!session || session !== secret) {
      if (!isLoginPage) {
        return NextResponse.redirect(new URL('/admin/login', request.url))
      }
    } else {
      if (isLoginPage) {
        return NextResponse.redirect(new URL('/admin', request.url))
      }
    }
    
    return NextResponse.next()
  }

  // Locale Logic
  const hasLocale = locales.some(
    (locale) => pathname === `/${locale}` || pathname.startsWith(`/${locale}/`)
  )

  if (!hasLocale) {
    request.nextUrl.pathname = `/${defaultLocale}${pathname}`
    return NextResponse.redirect(request.nextUrl)
  }

  return NextResponse.next()
}

export const config = {
  matcher: ['/((?!_next|favicon.ico|icons|manifest.webmanifest).*)'],
}