import { type NextRequest, NextResponse } from 'next/server'
import { updateSession } from '@/lib/supabase/middleware'

// Routes that require authentication
const protectedRoutes = ['/dashboard', '/settings', '/subscription']

// Routes that should redirect to dashboard if already authenticated
const authRoutes = ['/login', '/register']

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

  const { supabaseResponse, user } = await updateSession(request)

  // Check if trying to access protected route without auth
  const isProtectedRoute = protectedRoutes.some(route =>
    pathname === route || pathname === `${route}/` || pathname.startsWith(`${route}/`)
  )

  if (isProtectedRoute && !user) {
    // Use nextUrl.clone() to preserve basePath in redirect
    const redirectUrl = request.nextUrl.clone()
    redirectUrl.pathname = '/login/'
    redirectUrl.searchParams.set('redirectTo', pathname)
    return NextResponse.redirect(redirectUrl)
  }

  // Check if trying to access auth routes while already authenticated
  const isAuthRoute = authRoutes.some(route =>
    pathname === route || pathname === `${route}/` || pathname.startsWith(`${route}/`)
  )

  if (isAuthRoute && user) {
    // Use nextUrl.clone() to preserve basePath in redirect
    const url = request.nextUrl.clone()
    url.pathname = '/dashboard/'
    return NextResponse.redirect(url)
  }

  return supabaseResponse
}

export const config = {
  matcher: [
    // Only run middleware on specific routes that need auth handling
    // Note: /auth/callback is excluded - it handles its own auth flow
    '/dashboard/:path*',
    '/settings/:path*',
    '/subscription/:path*',
    '/login',
    '/login/',
    '/register',
    '/register/',
  ],
}