from django.shortcuts import redirect, get_object_or_404
from django.urls import reverse_lazy
from django.contrib.auth.decorators import login_required
from django.contrib.auth.mixins import LoginRequiredMixin
from django.db.models import Count, Q
from django.views.generic import CreateView, DeleteView, ListView
from django.utils.decorators import method_decorator
from django.http import HttpResponseRedirect

from propositions.models import Answer, Proposition


class PropositionCreate(LoginRequiredMixin, CreateView):
    template_name = "propositions/create.html"
    success_url = reverse_lazy("propositions:list")
    model = Proposition
    fields = ["name", "artist", "link"]

    def form_valid(self, form):
        proposition = form.save(commit=False)
        proposition.user = self.request.user.profile
        proposition.save()
        return HttpResponseRedirect(self.success_url)


class PropositionList(LoginRequiredMixin, ListView):
    template_name = "propositions/liste.html"
    context_object_name = "propositions"
    model = Proposition

    def get_queryset(self):
        return (
            Proposition.objects
            .annotate(nb_yes=Count("answer", filter=Q(answer__answer=Answer.YES)))
            .annotate(nb_no=Count("answer", filter=Q(answer__answer=Answer.NO)))
            .order_by("-nb_yes", "nb_no", "name")
        )


class PropDelete(DeleteView):
    model = Proposition
    template_name = "propositions/delete.html"
    success_url = reverse_lazy("propositions:list")

    @method_decorator(login_required)
    def dispatch(self, *args, **kwargs):
        return super(PropDelete, self).dispatch(*args, **kwargs)

    def delete(self, request, *args, **kwargs):
        self.object = self.get_object()
        success_url = self.get_success_url()
        if not ((self.object.user == self.request.user.profile)
                or self.request.user.profile.is_chef):
            return redirect("propositions:list")
        else:
            self.object.delete()
            return HttpResponseRedirect(success_url)


@login_required
def answer(request, id, ans):
    proposition = get_object_or_404(Proposition, id=id)
    user = request.user
    Answer.objects.filter(proposition=proposition, user=user).delete()
    Answer.objects.create(proposition=proposition, user=user, answer=ans)
    return redirect("propositions:list")