import logging

from django.shortcuts import render, redirect, render_to_response
from django.http import HttpResponse, JsonResponse
from django.utils import timezone
from django.contrib import messages
from django.views.decorators.csrf import csrf_exempt
from django_eventstream import send_event

from rest_framework.renderers import JSONRenderer
from rest_framework.parsers import JSONParser

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

logger = None

def init_loger(logger_type):
    global logger
    if logger == None:
        logger = logging.getLogger()
        logger.setLevel(logging.DEBUG)
        logger.addHandler(logging.StreamHandler())

# Create your views here.
def index(request):
    init_loger('django.db.backends')
    notices = Notice.objects.all()
    notices = Notice.objects.filter(pub_start__lte=timezone.now(), pub_end__gte=timezone.now())
    message = ""

    context = {
        "notices": notices,
        'message': message,
    }
    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()
            send_event('notice', 'message', newNotice.id)
            return redirect('posts')
    
    context = {'form' : NoticeForm()}
    return render(request, 'posts/edit.html', context)

def delete(request, deleteId=None):
    init_loger(__name__)
    logger.info(deleteId)
    message = ""
    if deleteId:
        delNotice = Notice.objects.get(id=deleteId)
        if delNotice:
            delNotice.delete()
            message = "Notice has been deleted."
            send_event('notice', 'message', "Notice has been deleted.")
    return redirect('posts')


@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)