from functools import partial, update_wrapper

from django.contrib.auth.decorators import user_passes_test
from django.core.urlresolvers import reverse_lazy
from django.http import HttpResponse
from django.views.generic import RedirectView


def empty_view(request, *args, **kwargs):
    return HttpResponse('')


def absolute_kwargs_view(request, arg1=1, arg2=2):
    return HttpResponse('')


def defaults_view(request, arg1, arg2):
    pass


def nested_view(request):
    pass


def erroneous_view(request):
    import non_existent  # NOQA


def pass_resolver_match_view(request, *args, **kwargs):
    response = HttpResponse('')
    response.resolver_match = request.resolver_match
    return response

uncallable = None  # neither a callable nor a string


class ViewClass(object):
    def __call__(self, request, *args, **kwargs):
        return HttpResponse('')

view_class_instance = ViewClass()


class LazyRedirectView(RedirectView):
    url = reverse_lazy('named-lazy-url-redirected-to')


@user_passes_test(lambda u: u.is_authenticated(), login_url=reverse_lazy('some-login-page'))
def login_required_view(request):
    return HttpResponse('Hello you')


def bad_view(request, *args, **kwargs):
    raise ValueError("I don't think I'm getting good value for this view")


empty_view_partial = partial(empty_view, template_name="template.html")


empty_view_wrapped = update_wrapper(
    partial(empty_view, template_name="template.html"), empty_view,
)