from billard.serializers import LocationDataSerializer
from billard.models import LocationData, Location, Client, Accounting
from billard.tasks import process_location_data
from rest_framework import viewsets
from django.shortcuts import render, redirect
from django.views import generic
from django.views.generic.detail import DetailView
from django.contrib.auth.decorators import login_required
from django.db.models import Min, Sum
from django.http import HttpResponse


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


class IndexView(generic.ListView):
    model = LocationData

    def get_template_names(self):
        if self.request.is_ajax():
            return ('billard/locationdata_list_ajax.html',)
        return super().get_template_names()


class LocationDataDetailView(DetailView):
    model = LocationData

    def get_template_names(self):
        if self.request.is_ajax():
            return ('billard/locationdata_detail_ajax.html',)
        return super().get_template_names()


@login_required
def accountmodalview(request):
    try:
        uuids = Client.objects.filter(report_user=request.user).values_list('uuid')
        account = Accounting.objects.filter(reporter_uuid__in=uuids).first
        #TODO: support multiple account objects
    except Client.DoesNotExist:
        account = None
    context = {
        'account': account
    }
    return render(request, 'billard/accountmodal.html', context=context)


@login_required
def accountmodalconfirmview(request, pk):
    account = Accounting.objects.get(pk=pk)
    account.reporter_uuid = None
    account.save()
    return redirect('carom_index')


@login_required
def accounting(request):
    if request.method == 'GET':
        template = 'billard/accounting.html'
        loc = None
        min_loc = Location.objects.filter(users__id=request.user.id).aggregate(Min('id'))['id__min']
        if 'loc' in request.GET:
            loc = request.GET['loc']
        if not Location.objects.filter(users__id=request.user.id).filter(id=loc).exists():
            resp = redirect('accounting')
            if min_loc is not None:
                resp['Location'] += '?loc={}'.format(str(min_loc))
                request.session['loc'] = str(min_loc)
                return resp
            else:
                return render(request, accounting)
        if loc is None:
            loc = min_loc
        locations = Location.objects.filter(users__id=request.user.id).order_by('code')
        acc = Accounting.objects.filter(billed=False).exclude(time_to__isnull=True).\
            filter(desk__client__location_id=loc).order_by('-time_from')
        acc_sum = acc.aggregate(Sum('prize'))
        acc_ids = list()
        for a in acc:
            acc_ids.append(a.id)

        context = {
            'location_id': int(loc),
            'locations': locations,
            'accounting': acc,
            'acc_ids': ','.join(str(e) for e in acc_ids),
        }
        if acc_sum['prize__sum'] is None:
            context['acc_sum'] = 0
        else:
            context['acc_sum'] = acc_sum['prize__sum']
        return render(request, template_name=template, context=context)
    if request.method == 'POST':
        loc = request.POST['location-selector']
        if 'accountings' in request.POST:
            acc_ids = request.POST['accountings'].split(',')
            Accounting.objects.filter(id__in=acc_ids).update(billed=True)
        request.session['loc'] = str(loc)
        resp = redirect('accounting')
        resp['Location'] += '?loc={}'.format(str(loc))
        return resp


@login_required
def index(request):
    if request.method == 'GET':
        template = 'billard/index.html'
        loc = None
        if request.is_ajax():
            template = 'billard/index_ajax.html'
            loc = request.session.get('loc')
        min_loc = Location.objects.filter(users__id=request.user.id).aggregate(Min('id'))['id__min']
        if 'loc' in request.GET:
            loc = request.GET['loc']
        if not Location.objects.filter(users__id=request.user.id).filter(id=loc).exists():
            resp = redirect('carom_index')
            if min_loc is not None:
                resp['Location'] += '?loc={}'.format(str(min_loc))
                request.session['loc'] = str(min_loc)
                return resp
            else:
                return render(request, template)
        if loc is None:
            loc = min_loc
        locations = Location.objects.filter(users__id=request.user.id).order_by('code')
        clients = Client.objects.filter(location_id=loc).order_by('id')
        context = {
            'range': range(1, 9),
            'locations': locations,
            'clients': clients,
            'location_id': int(loc),
        }
        return render(request, template, context=context)
    if request.method == 'POST':
        loc = request.POST['location-selector']
        request.session['loc'] = str(loc)
        resp = redirect('carom_index')
        resp['Location'] += '?loc={}'.format(str(loc))
        return resp


def process_locationdata(request):
    process_location_data()
    return HttpResponse('DONE')