from django.shortcuts import render, redirect
from django.http import HttpResponse
from django.forms.models import ModelForm
from django.forms import TextInput, TimeInput

from .models import Event, EventParticipation

from .serializers import ParticipationSerializer

import datetime

from rest_framework.decorators import api_view
from rest_framework.response import Response
from rest_framework import status

from crispy_forms.helper import FormHelper
from crispy_forms.layout import Submit


# ---------------------------------------- API ---------------------------------------------------------


@api_view(['GET', 'PUT'])
def event_api(request, username=None, eventId=None):
    try:
        participationQs = EventParticipation.objects.filter(event__date__gte=datetime.date.today())
        if username:
            participationQs = EventParticipation.objects.filter(user__username=username)
        if eventId:
            participationQs = participationQs.filter(event__pk=eventId)
    except EventParticipation.DoesNotExist:
        return HttpResponse(status=404)

    if request.method == 'GET':
        serializer = ParticipationSerializer(participationQs)
        return Response(serializer.data)

    elif request.method == 'PUT':
        serializer = ParticipationSerializer(participationQs, data=request.DATA, many=True)
        if serializer.is_valid():
            for serializedObject in serializer.object:
                if not (EventParticipation.isMember(request.user) or EventParticipation.isAdmin(request.user)):
                    return Response(status=status.HTTP_403_FORBIDDEN)
                if serializedObject.user != request.user:
                    if not EventParticipation.isAdmin(request.user):
                        return Response(status=status.HTTP_403_FORBIDDEN)

            serializer.save()
            return Response(serializer.data)
        else:
            return Response(status=status.HTTP_400_BAD_REQUEST)


# ------------------------------------ Normal Views ----------------------------------------------------

def eventplanning(request):
    """
        View for a specific user, to edit his events
    """
    # non-members see the grid - but cannot edit anything
    if not EventParticipation.isMember(request.user):
        return events_grid(request)

    # All events in the future sorted by date
    all_future_events = list(Event.objects.filter(date__gte=datetime.date.today()).order_by('date'))

    for e in all_future_events:
        e.participation = EventParticipation.get_or_create(event=e, user=request.user)

    context = {'events': all_future_events}
    return render(request, 'eventplanner/eventplanning_view.html', context)


def events_grid(request):
    usernames = [u.username for u in EventParticipation.members()]

    all_future_events = list(Event.objects.filter(date__gte=datetime.date.today()).order_by('date'))

    for e in all_future_events:
        e.participation = [EventParticipation.get_or_create(event=e, user=u) for u in EventParticipation.members()]

    context = {'events': all_future_events,
               'usernames': usernames}

    return render(request, 'eventplanner/events_grid.html', context)


def deleteEvent(request, pk):
    Event.objects.get(pk=pk).delete()
    return redirect(events_grid)


# ------------------------------------ Detail Views ----------------------------------------------------


from django.views.generic.edit import UpdateView, CreateView

from location_field.widgets import LocationWidget


class EventForm(ModelForm):
    def __init__(self, *args, **kwargs):
        self.helper = FormHelper()
        self.helper.form_class = 'form-horizontal'
        self.helper.add_input(Submit('submit', 'Speichern'))
        super(EventForm, self).__init__(*args, **kwargs)

    class Meta:
        model = Event
        fields = ['type', 'short_desc', 'date', 'end_date', 'time', 'meeting_time', 'location', 'map_location',
                  'desc', ]

        widgets = {
            'time': TimeInput(format='%H:%M'),
            'location': TextInput(),
            'map_location': LocationWidget(),
        }


class EventUpdate(UpdateView):
    form_class = EventForm
    model = Event
    template_name_suffix = "_update_form"
    success_url = '.'

    def get_context_data(self, **kwargs):
        context = super(UpdateView, self).get_context_data(**kwargs)
        context['viewtype'] = "update"
        return context


class EventCreate(CreateView):
    form_class = EventForm
    model = Event
    template_name_suffix = "_update_form"
    success_url = '.'

    def get_context_data(self, **kwargs):
        context = super(CreateView, self).get_context_data(**kwargs)
        context['viewtype'] = "create"
        return context