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

export function middleware(request: NextRequest) {
  const token = request.cookies.get('auth_token')
  
  // Public paths that don't require authentication
  if (
    request.nextUrl.pathname.startsWith('/_next') ||
    request.nextUrl.pathname.startsWith('/static') ||
    request.nextUrl.pathname === '/login' ||
    request.nextUrl.pathname === '/favicon.ico' ||
    request.nextUrl.pathname.startsWith('/api/auth')
  ) {
    // If user is already logged in and tries to access login, redirect to dashboard
    if (token && request.nextUrl.pathname === '/login') {
        return NextResponse.redirect(new URL('/', request.url))
    }
    return NextResponse.next()
  }

  // If no token, redirect to login
  if (!token) {
    return NextResponse.redirect(new URL('/login', request.url))
  }

  return NextResponse.next()
}

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