"""
Views for displaying / manipulating models within the Activities app.
"""
import json

from django.contrib.auth.mixins import LoginRequiredMixin
from django.http import HttpResponse
from django.views.generic import CreateView, DetailView, ListView, View
from django.views.generic.detail import SingleObjectMixin

from people import models as people_models
from people import permissions
from . import forms, models


class ActivitySeriesListView(LoginRequiredMixin, ListView):
    """
    View displaying a list of :class:`ActivitySeries`.
    """
    model = models.ActivitySeries
    template_name = 'activities/activity_series/list.html'
    context_object_name = 'activity_series_list'


class ActivitySeriesDetailView(LoginRequiredMixin, DetailView):
    """
    View displaying details of a single :class:`ActivitySeries`.
    """
    model = models.ActivitySeries
    template_name = 'activities/activity_series/detail.html'
    context_object_name = 'activity_series'
    
    
class ActivityCreateView(LoginRequiredMixin, CreateView):
    """
    View to create a new instance of :class:`Activity`.
    """
    model = models.Activity
    template_name = 'activities/activity/create.html'
    form_class = forms.ActivityForm


class ActivityListView(LoginRequiredMixin, ListView):
    """
    View displaying a list of :class:`Activity`.
    """
    model = models.Activity
    template_name = 'activities/activity/list.html'


class ActivityDetailView(LoginRequiredMixin, DetailView):
    """
    View displaying details of a single :class:`Activity`.
    """
    model = models.Activity
    template_name = 'activities/activity/detail.html'

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)

        context['user_is_attending'] = self.object.attendance_list.filter(
            pk=self.request.user.person.pk
        ).exists()

        return context


class ActivityAttendanceView(permissions.UserIsLinkedPersonMixin, SingleObjectMixin, View):
    """
    View to add or delete attendance of an activity.
    """
    model = models.Activity

    def get_test_person(self) -> people_models.Person:
        data = json.loads(self.request.body)

        return people_models.Person.objects.get(pk=data['pk'])

    def post(self, request, *args, **kwargs):
        self.object = self.get_object()

        if request.is_ajax():
            self.object.attendance_list.add(self.get_test_person())

            return HttpResponse(status=204)

        return HttpResponse("URL does not support non-AJAX requests", status=400)

    def delete(self, request, *args, **kwargs):
        self.object = self.get_object()

        if request.is_ajax():
            self.object.attendance_list.remove(self.get_test_person())

            return HttpResponse(status=204)

        return HttpResponse("URL does not support non-AJAX requests", status=400)