from django.shortcuts import get_object_or_404, render

# Create your views here.

from django.http import HttpResponse
from django.template import loader

from .models import Question

from django.http import Http404

## simple index
#def index(request):
#  return HttpResponse("Hello, world. You're at the polls index.")

## meaningful index
#def index(request):
#  latest_question_list = Question.objects.order_by('-pub_date')[:5]
#  output = ', '.join([q.question_text for q in latest_question_list])
#  return HttpResponse(output)

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

## meaningful, templated and easy to write index
## and then we no longer need to import loader and HttpResponse
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)

## simple detail
#def detail(request, question_id):
#  return HttpResponse("You're looking at question %s." % question_id)

## meaningful detail
#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})

## meaningful and easy to write detail
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 vote(request, question_id):
  return HttpResponse("You're voting on question %s." % question_id)