from django.shortcuts import render

from .forms import RegisterForm, LoginForm
from django.contrib.auth import authenticate, login, logout
# from django.views.generic.edit import FormView
from django.views.generic import FormView, RedirectView
from django.contrib.auth import get_user_model
from django.http import HttpResponseRedirect
from django.core.urlresolvers import reverse
from django.contrib.auth.forms import AuthenticationForm, UserCreationForm
from django.contrib.auth import REDIRECT_FIELD_NAME
from django.views.decorators.csrf import csrf_protect
from django.contrib import auth
from django.views.decorators.cache import never_cache
from django.shortcuts import redirect
from django.utils.decorators import method_decorator
from django.views.decorators.debug import sensitive_post_parameters
from django.utils.http import is_safe_url


# Create your views here.

class RegisterView(FormView):
    form_class = RegisterForm
    template_name = 'account/registration_form.html'

    def form_valid(self, form):
        user = form.save(False)
        user.save(True)
        url = reverse('accounts:login')
        return HttpResponseRedirect(url)


class LogoutView(RedirectView):
    url = '/login/'

    @method_decorator(never_cache)
    def dispatch(self, request, *args, **kwargs):
        return super(LogoutView, self).dispatch(request, *args, **kwargs)

    def get(self, request, *args, **kwargs):
        from DjangoBlog.utils import cache
        cache.clear()
        logout(request)
        return super(LogoutView, self).get(request, *args, **kwargs)


class LoginView(FormView):
    form_class = LoginForm
    template_name = 'account/login.html'
    success_url = '/'
    redirect_field_name = REDIRECT_FIELD_NAME

    @method_decorator(sensitive_post_parameters('password'))
    @method_decorator(csrf_protect)
    @method_decorator(never_cache)
    def dispatch(self, request, *args, **kwargs):

        return super(LoginView, self).dispatch(request, *args, **kwargs)

    def form_valid(self, form):
        form = AuthenticationForm(data=self.request.POST, request=self.request)

        if form.is_valid():
            from DjangoBlog.utils import cache
            if cache and cache is not None:
                cache.clear()
            auth.login(self.request, form.get_user())

            return HttpResponseRedirect('/')
        else:
            return self.render_to_response({
                'form': form
            })

    def get_success_url(self):
        redirect_to = self.request.GET.get(self.redirectfieldname)
        if not is_safe_url(url=redirect_to, host=self.request.get_host()):
            redirect_to = self.success_url
        return redirect_to