from django.conf import settings
from django.shortcuts import redirect
from django.urls import reverse
from urllib.parse import quote

class LoginRequiredMiddleware:
    def __init__(self, get_response):
        self.get_response = get_response
        self.exempt_urls = [
                               reverse('login'),
                               reverse('logout'),
                               reverse('admin:login'),
                               reverse('admin:index'),
                           ] + getattr(settings, 'LOGIN_EXEMPT_URLS', [])

    def __call__(self, request):
        if not request.user.is_authenticated:
            path = request.path_info
            if not any(path.startswith(url) for url in self.exempt_urls):
                if request.method == 'GET':
                    if request.get_full_path() and request.get_full_path() != '/':
                        return redirect(f"{settings.LOGIN_URL}?next={quote(request.get_full_path())}")
                return redirect(settings.LOGIN_URL)
        return self.get_response(request)