from functools import wraps

from django.core.urlresolvers import reverse
from django.http import HttpResponseRedirect, Http404
from django.utils.decorators import available_attrs

from helpdesk import settings as helpdesk_settings


def protect_view(view_func):
    """
    Decorator for protecting the views checking user, redirecting
    to the log-in page if necessary or returning 404 status code
    """
    @wraps(view_func, assigned=available_attrs(view_func))
    def _wrapped_view(request, *args, **kwargs):
        if not request.user.is_authenticated() and helpdesk_settings.HELPDESK_REDIRECT_TO_LOGIN_BY_DEFAULT:
            return HttpResponseRedirect(reverse('helpdesk:login'))
        elif not request.user.is_authenticated() and helpdesk_settings.HELPDESK_ANON_ACCESS_RAISES_404:
            raise Http404
        return view_func(request, *args, **kwargs)

    return _wrapped_view
