from django.http import Http404, HttpResponseRedirect
from django.utils import timezone
from .models import Choice, Question
from django.shortcuts import get_object_or_404, render
from django.http import HttpResponse
from django.urls import reverse
# Create your views here.


def index(request):
    # filter 过滤 pub_date 为现在及之前的
    latest_question_list = Question.objects.filter(pub_date__lte=timezone.now()).order_by('-pub_date')[:5]
    context = {'latest_question_list': latest_question_list}
    return render(request, 'polls/judge.html', context)


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


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):
    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, )))

from django.http import Http404, HttpResponseRedirect
from django.utils import timezone
from .models import Choice, Question
from django.shortcuts import get_object_or_404, render
from django.http import HttpResponse
from django.urls import reverse
# Create your views here.


def index(request):
    # filter 过滤 pub_date 为现在及之前的
    latest_question_list = Question.objects.filter(pub_date__lte=timezone.now()).order_by('-pub_date')[:5]
    context = {'latest_question_list': latest_question_list}
    return render(request, 'polls/judge.html', context)


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


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):
    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, )))

# Create your views here. # filter 过滤 pub_date 为现在及之前的