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

  // Skip middleware for homepage - let it render statically
  if (pathname === '/' || pathname === '') {
    return NextResponse.next()
  }

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

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

  if (isProtectedRoute && !user) {
    const redirectUrl = new URL('/login/', request.url)
    // Save the original URL to redirect back after 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.startsWith(route)
  )

  if (isAuthRoute && user) {
    return NextResponse.redirect(new URL('/dashboard/', request.url))
  }

  return supabaseResponse
}

export const config = {
  matcher: [
    /*
     * Match all request paths except for the ones starting with:
     * - _next/static (static files)
     * - _next/image (image optimization files)
     * - favicon.ico (favicon file)
     * - public folder files
     */
    '/((?!_next/static|_next/image|favicon.ico|.*\\.(?:svg|png|jpg|jpeg|gif|webp)$).*)',
  ],
}