from django.shortcuts import render
from django.http import HttpResponse
from django.views import generic
from django.template import loader
from django.urls import reverse_lazy
from .models import ArrowCount
from .forms import ArrowCountForm
from django.contrib.auth.decorators import login_required
from django.conf import settings
from django.core.exceptions import SuspiciousOperation

def index(request):
    template = loader.get_template('index.html')
    return HttpResponse(template.render({}, request))

@login_required
def arrow_count_list(request):
    page = request.GET.get('page')

    if not page:
        page = 1
    else:
        page = int(page)

    if page <= 0:
        raise SuspiciousOperation("page is negative or 0")

    start = settings.ITEMS_PER_PAGE * (page - 1)
    finish = settings.ITEMS_PER_PAGE + start
    counts = ArrowCount.objects.order_by('-date') \
        .filter(user = request.user)[start:finish]
    template = loader.get_template('counter/list.html')
    return HttpResponse(template.render({'counts': counts}, request))

class NewArrowCount(generic.CreateView):
    form_class = ArrowCountForm
    success_url = reverse_lazy('count_list')
    template_name = 'counter/new.html'

    def form_valid(self, form):
        form.instance.user = self.request.user
        return super().form_valid(form)

class EditArrowCount(generic.UpdateView):
    form_class = ArrowCountForm
    success_url = reverse_lazy('count_list')
    template_name = 'counter/edit.html'

    def get_object(self, queryset=None):
        obj = ArrowCount.objects.get(id=self.kwargs['id'])
        return obj