import logging

from django.contrib.auth.decorators import login_required, permission_required
from django.contrib.auth.mixins import LoginRequiredMixin
from django.db.models import Sum
from django.shortcuts import render, redirect
from django.urls import reverse_lazy
from django.utils import timezone
from django.utils.decorators import method_decorator
from django.views import generic
from django.views.generic import UpdateView
from rest_framework import viewsets

from billard.models import LocationData, Location, Client, Accounting
from billard.serializers import LocationDataSerializer, ClientUpdateLastSeenSerializer
from .forms import UserInformationUpdateForm
from .tables import LocationTable, LocationAccountingTable

log = logging.getLogger(__name__)


class LocationIndexView(LoginRequiredMixin, generic.ListView):
    template_name = 'billard/location_index.html'
    context_object_name = 'location_list'

    def get_queryset(self):
        """Return the last five published questions."""
        return Location.objects.filter(users__id=self.request.user.id).order_by('code')

    def get_context_data(self, *, object_list=None, **kwargs):
        context = super().get_context_data(object_list=object_list, **kwargs)
        table = LocationTable(self.get_queryset())
        user = self.request.user
        if user.has_perm('billard.change_accounting'):
            table = LocationAccountingTable(self.get_queryset())
        context['table'] = table
        return context


class LocationDetailView(LoginRequiredMixin, generic.DetailView):
    model = Location
    template_name = 'billard/location_detail.html'

    def dispatch(self, request, *args, **kwargs):
        if request.is_ajax():
            context = {
                'location': self.get_object(),
            }
            return render(request, template_name='billard/location_detail_ajax.html', context=context)
        result = super(LocationDetailView, self).dispatch(request, *args, **kwargs)
        result.context_data['pk'] = self.kwargs['pk']
        return result


@method_decorator(login_required, name='dispatch')
class AccountingView(generic.ListView):
    template_name = 'billard/accounting.html'
    context_object_name = 'accounting'

    def get_queryset(self):
        return Accounting.objects.filter(billed=False).filter(desk__client__location_id=self.kwargs['pk']) \
            .exclude(time_to__isnull=True).order_by('time_from')

    def dispatch(self, request, *args, **kwargs):
        result = super(AccountingView, self).dispatch(request, *args, **kwargs)
        acc_sum = self.get_queryset().aggregate(Sum('prize'))
        if acc_sum['prize__sum'] is None:
            result.context_data['acc_sum'] = 0
        else:
            result.context_data['acc_sum'] = acc_sum['prize__sum']
        result.context_data['acc_ids'] = [acc.id for acc in self.get_queryset().all()]
        result.context_data['location'] = Location.objects.get(pk=self.kwargs['pk'])
        return result


@login_required
@permission_required('billard.change_accounting')
def accounting_confirm(request, pk):
    if request.method == 'POST':
        if 'accountings' in request.POST:
            acc_ids = request.POST.getlist('list_acc_id')
            if len(acc_ids) > 0:
                Accounting.objects.filter(id__in=acc_ids).update(
                    billed=True,
                    account_user=request.user.username,
                    account_tst=timezone.now(),
                )
    resp = redirect('billard:accounting_detail', pk=pk)
    return resp


@login_required
def account_modal_view(request, loc_pk):
    try:
        uuids = Client.objects.filter(report_user=request.user).values_list('uuid')
        accounts = Accounting.objects.filter(reporter_uuid__in=uuids)
        # TODO: support multiple account objects
    except Client.DoesNotExist:
        accounts = None
    context = {
        'accounts': accounts,
        'loc_pk': loc_pk,
        'pks': ','.join([str(account.pk) for account in accounts]),
    }
    return render(request, 'billard/accountmodal.html', context=context)


@login_required
def account_modal_confirm_view(request, loc_pk, pks):
    for pk in pks.split(','):
        account = Accounting.objects.get(pk=pk)
        account.reporter_uuid = None
        account.save()
    return redirect('billard:location_detail', pk=loc_pk)


class LocationDataViewSet(viewsets.ModelViewSet):
    queryset = LocationData.objects.all()
    serializer_class = LocationDataSerializer


class ClientUpdateLastSeenViewSet(viewsets.ModelViewSet):
    queryset = LocationData.objects.all()
    serializer_class = ClientUpdateLastSeenSerializer


@method_decorator(login_required, name='dispatch')
class UserUpdateView(UpdateView):
    form_class = UserInformationUpdateForm
    template_name = 'registration/my_account.html'
    success_url = reverse_lazy('billard:my_account')

    def get_object(self):
        return self.request.user