from django.http import HttpResponseRedirect
from django.shortcuts import get_object_or_404, render
from django.urls import reverse
from django.views import generic
from django.utils import timezone

from .models import Choice, Question


# def index(request):
#     latest_question_list = Question.objects.order_by("-pub_date")[:5]
#     context = {"latest_question_list": latest_question_list}
#     return render(request, "polls/index.html", context)


# def index(request):
#     lastest_question_list = Question.objects.order_by("-pub_date")[:5]
#     template = loader.get_template("polls/index.html")
#     context = {
#         "lastest_question_list": lastest_question_list
#     }
#     return HttpResponse(template.render(context, request))


# def detail(request, question_id):
#     try:
#         question = Question.objects.get(pk=question_id)
#     except Question.DoesNotExist:
#         raise Http404("Question does not exist")
#     return render(request, "polls/detail.html", {"question": question})


# def detail(request, question_id):
#     question = get_object_or_404(Question, pk=question_id)
#     return render(request, "polls/detail.html", {"question": question})


# def results(request, question_id):
#     response = "You're looking at the results of question %s."
#     return HttpResponse(response % question_id)


# def results(request, question_id):
#     question = get_object_or_404(Question, pk=question_id)
#     return render(request, "polls/results.html", {"question": question})


# def vote(request, question_id):
#     return HttpResponse("You're voting on question %s." % question_id)


class IndexView(generic.ListView):
    template_name = "polls/index.html"
    context_object_name = "latest_question_list"

    def get_queryset(self):
        """
        Return the last five published questions (not including those set to be
        published in the future).
        """
        return Question.objects.filter(pub_date__lte=timezone.now()).order_by("-pub_date")[
            :5
        ]


class DetailView(generic.DetailView):
    model = Question
    template_name = "polls/detail.html"

    def get_queryset(self):
        """
        Excludes any questions that aren't published yet.
        """
        return Question.objects.filter(pub_date__lte=timezone.now())

class ResultsView(generic.DetailView):
    model = Question
    template_name = "polls/results.html"


def vote(request, question_id):
    question = get_object_or_404(Question, pk=question_id)
    try:
        selected_choice = question.choice_set.get(pk=request.POST["choice"])
    except (KeyError, Choice.DoesNotExist):
        return render(
            request,
            "polls/detail.html",
            {
                "question": question,
                "error_message": "You didn't select a choice.",
            },
        )
    else:
        selected_choice.votes += 1
        selected_choice.save()
        return HttpResponseRedirect(reverse("polls:results", args=(question.id,)))