from braces.views import LoginRequiredMixin
from django.core.urlresolvers import reverse
from django.db.models import Count
from django.shortcuts import get_object_or_404, render
from django.views.generic import RedirectView, UpdateView
from rest_framework.authtoken.models import Token

from network.base.forms import StationForm
from network.base.models import Antenna, Observation, Station
from network.base.perms import schedule_perms
from network.users.forms import UserForm
from network.users.models import User


class UserRedirectView(LoginRequiredMixin, RedirectView):
    permanent = False

    def get_redirect_url(self):
        return reverse("users:view_user",
                       kwargs={"username": self.request.user.username})


class UserUpdateView(LoginRequiredMixin, UpdateView):

    form_class = UserForm

    model = User

    def get_success_url(self):
        return reverse("users:view_user",
                       kwargs={"username": self.request.user.username})

    def get_object(self):
        return User.objects.get(username=self.request.user.username)


def view_user(request, username):
    """View for user page."""
    user = get_object_or_404(User, username=username)
    observations = Observation.objects.filter(author=user)[0:10]
    stations = Station.objects.filter(owner=user).annotate(total_obs=Count('observations'))
    token = ''

    can_schedule = False
    if request.user.is_authenticated():
        can_schedule = schedule_perms(request.user)

        if request.user == user:
            try:
                token = Token.objects.get(user=user)
            except Token.DoesNotExist:
                token = Token.objects.create(user=user)
    form = StationForm()
    antennas = Antenna.objects.all()

    return render(request, 'users/user_detail.html',
                  {'user': user, 'observations': observations, 'stations': stations,
                   'token': token, 'form': form, 'antennas': antennas,
                   'can_schedule': can_schedule})