from django.shortcuts import render, redirect
from django.views.decorators.csrf import csrf_exempt
from rest_framework.parsers import JSONParser

from posts.forms import NoticeForm
from posts.serializers import NoticeSerializer
from .models import Notice
from django.utils import timezone
from django.http import HttpResponse, JsonResponse


def index(request):
    notices = Notice.objects.all()
    notices = notices.filter(pub_start__lte=timezone.now())
    notices = notices.filter(pub_end__gte=timezone.now())
    context = {'notices': notices}
    return render(request, 'posts/Notice.html', context)


def new(request):
    if request.method == "POST":
         form = NoticeForm(request.POST)
         if form.is_valid():
             newNotice = Notice(notice_title=form.cleaned_data['title'],
                                notice_text=form.cleaned_data['text'],
                                pub_start=form.cleaned_data['start'],
                                pub_end=form.cleaned_data['end'])
             newNotice.save()
             return redirect('index')
    context = {'form' : NoticeForm()}
    return render(request, 'posts/edit.html', context)

def delete(request, deleteId=None):
    if deleteId != None:
        delNotice = Notice.objects.get(id=deleteId)
        if delNotice != None:
           delNotice.delete()
    return redirect('index')

@csrf_exempt
def notice_list(request):
    if request.method == 'GET':
        notices = Notice.objects.all()
        serializer = NoticeSerializer(notices,many=True)
        return JsonResponse(serializer.data,safe=False)
    elif request.method == 'POST':
        data = JSONParser().parse(request)
        serializer = NoticeSerializer(data=data)
        if serializer.is_valid():
            serializer.save()
            return JsonResponse(serializer.data, status=201)
        return JsonResponse(serializer.errors, status=400)
@csrf_exempt
def notice_detail(request,id):
    try:
        notice = Notice.objects.get(id=id)
    except Notice.DoesNotExist:
          return HttpResponse(status=404)
    if request.method == 'GET':
        serializer = NoticeSerializer(notice)
        return JsonResponse(serializer.data)
    elif request.method == 'PUT':
        data = JSONParser().parse(request)
        serializer = NoticeSerializer(notice, data=data)
        if serializer.is_valid():
            serializer.save()
            return JsonResponse(serializer.data)
        return JsonResponse(serializer.errors, status=400)
    elif request.method == 'DELETE':
        notice.delete()
        return HttpResponse(status=204)