from django.http import JsonResponse
from django.shortcuts import render, redirect
from rest_framework.parsers import JSONParser

from .models import Notice
from django.utils import timezone
from .forms import NoticeForm
from django.contrib.auth.decorators import login_required
from django.views.decorators.csrf import csrf_exempt



from django.contrib import messages
from .serializers import NoticeSerializer


@login_required
def new(request):
    if request.method == 'POST':
        form = NoticeForm(request.POST)
        if form.is_valid():
            notice = Notice()
            notice.notice_title = form.cleaned_data['notice_title']
            notice.notice_text = form.cleaned_data['notice_text']
            notice.pub_start = form.cleaned_data['pub_start']
            notice.pub_end = form.cleaned_data['pub_end']
            notice.user_id = request.user.id
            notice.save()
            messages.success(request, f"Neue Nachricht erstellt")
            return redirect('index')
        else:
            for msg in form.error_messages:
                messages.error(request, f"{msg}: {form.error_messages[msg]}")
    context = {'form': NoticeForm()}
    return render(request, 'polls/edit.html', context)

@login_required
def delete(request, deleteId=None):
    if deleteId is not None:
        try:
            notice = Notice.objects.get(pk=deleteId)
            if request.user.id == notice.user_id or request.user.is_staff:
                notice.delete()
                messages.success(request, f"Nachricht cht")
            else:
                messages.warning(request, f"Keine Berechtigung")
        except:
            messages.warning(request, f"Nachricht nicht gefunden")
    return redirect('index')


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, 'polls/index.html', context)



@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)
    else:
        return JsonResponse({'error': 'GET or POST request required'}, status=400)

@csrf_exempt
def notice_detail(request, id):
    try:
        notice = Notice.objects.get(pk=id)
    except Notice.DoesNotExist:
        return JsonResponse({'error': 'Notice not found'}, 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 JsonResponse({'message': 'Notice was deleted successfully!'}, status=204)
    else:
        return JsonResponse({'error': 'GET, PUT or DELETE request required'}, status=400)