from django.contrib.auth.decorators import login_required
from django.shortcuts import render, redirect
from django.views.decorators.csrf import csrf_exempt
from django_eventstream import send_event
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)

@login_required
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()
            send_event('notice', 'message',  newNotice.id)
            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()
            send_event('notice', 'message', deleteId)
    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=201)
@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)