from django.http import JsonResponse
from django.shortcuts import render, redirect, HttpResponse
from django.utils import timezone
from django.contrib.auth.decorators import login_required
from django.contrib.admin.views.decorators import staff_member_required
from rest_framework.parsers import JSONParser
from django.views.decorators.csrf import csrf_exempt

from .forms import NoticeForm
from .models import Notice
from .serializers import NoticeSerializer


def index(request):
    notices = Notice.objects.all()
    notices.filter(pub_start__lte=timezone.now())
    notices.filter(pub_start__gte=timezone.now())
    context = { "notices": notices }
    return render(request, 'posts/index.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()
            return redirect('index')
    context = {'form': NoticeForm()}
    return render(request, 'posts/edit.html', context)

@staff_member_required
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 == 'POST':
        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)