from django.contrib.auth.decorators import login_required
from django.db.models import Q
from django.utils.decorators import method_decorator
from django.views.generic import DetailView, ListView

from oauth2_provider.contrib.rest_framework import TokenHasScope, IsAuthenticatedOrTokenHasScope
from rest_framework import generics, permissions
from rest_framework.response import Response

from apps.gooyal_oauth2.rest_framework import IsAuthenticatedOrTokenMatchesOASRequirements
from apps.wallet.models import Transaction
from apps.wallet.serializers import TransactionSerializer, DepositSerializer, WithdrawSerializer
from apps.users.constans import STATE_CHOICES


def get_application_client_id(request):
    try:
        application = request.auth.application
        if application:
            application_client_id = application.client_id
        else:
            application_client_id = request.auth.detail.get('client_id')
    except:
        application_client_id = None
    return application_client_id


class TransactionList(generics.ListCreateAPIView):
    permission_classes = [IsAuthenticatedOrTokenMatchesOASRequirements]
    serializer_class = TransactionSerializer
    required_alternate_scopes = {
        "GET": [['wallet.transaction:list']],
        "POST": [['wallet.invoice:create']],
        }

    def get_queryset(self):
        user = self.request.user
        return Transaction.objects.filter(Q(payee=user) | Q(payer=user)).all()

    def perform_create(self, serializer):
        user = self.request.user
        serializer.save(payee=user, application_client_id=get_application_client_id(self.request))


class TransactionDetail(generics.RetrieveAPIView):
    permission_classes = [permissions.IsAuthenticated, IsAuthenticatedOrTokenHasScope]
    serializer_class = TransactionSerializer
    lookup_field = 'uuid'
    required_scopes = ['wallet.transaction:retrieve']

    def get_queryset(self):
        user = self.request.user
        return Transaction.objects.filter(Q(payee=user) | Q(payer=user) | Q(payer__isnull=True)).all()


class TransactionPay(generics.RetrieveAPIView):
    permission_classes = [permissions.IsAuthenticated, IsAuthenticatedOrTokenHasScope]
    serializer_class = TransactionSerializer
    lookup_field = 'uuid'
    required_scopes = ['wallet.invoice:pay']

    def get_queryset(self):
        user = self.request.user
        return Transaction.objects.filter(Q(payer=user) | Q(payer__isnull=True)).all()

    def retrieve(self, request, *args, **kwargs):
        instance = self.get_object()
        instance.pay(payer=self.request.user)
        serializer = self.get_serializer(instance)
        return Response(serializer.data)


class TransactionReceipt(generics.RetrieveAPIView):
    permission_classes = [permissions.IsAuthenticated, IsAuthenticatedOrTokenHasScope]
    serializer_class = TransactionSerializer
    lookup_field = 'uuid'
    required_scopes = ['wallet.invoice:receipt']

    def get_queryset(self):
        user = self.request.user
        return Transaction.objects.filter(payer=user).all()

    def retrieve(self, request, *args, **kwargs):
        instance = self.get_object()
        instance.receipt()
        serializer = self.get_serializer(instance)
        return Response(serializer.data)


class DepositSubmit(generics.CreateAPIView):
    permission_classes = [TokenHasScope]
    serializer_class = DepositSerializer
    required_scopes = ['wallet.deposit:submit']

    def get_queryset(self):
        application_client_id = get_application_client_id(self.request)
        return Transaction.objects.filter(application_client_id=application_client_id).all()

    def perform_create(self, serializer):
        payer = self.request.auth.application.user
        serializer.save(payer=payer, application_client_id=get_application_client_id(self.request))


class DepositVerify(generics.RetrieveAPIView):
    permission_classes = [TokenHasScope]
    serializer_class = DepositSerializer
    lookup_field = 'uuid'
    required_scopes = ['wallet.deposit:verify']

    def get_queryset(self):
        application_client_id = get_application_client_id(self.request)
        return Transaction.objects.filter(application_client_id=application_client_id).all()

    def retrieve(self, request, *args, **kwargs):
        instance = self.get_object()
        if instance.state == STATE_CHOICES.pending:
            instance.verify()

        serializer = self.get_serializer(instance)
        return Response(serializer.data)


class WithdrawSubmit(generics.CreateAPIView):
    permission_classes = [TokenHasScope]
    serializer_class = WithdrawSerializer
    required_scopes = ['wallet.withdraw:submit']

    def get_queryset(self):
        application_client_id = get_application_client_id(self.request)
        return Transaction.objects.filter(application_client_id=application_client_id).all()

    def perform_create(self, serializer):
        payee = self.request.auth.application.user
        serializer.save(payee=payee, application_client_id=get_application_client_id(self.request))


class WithdrawVerify(generics.RetrieveAPIView):
    permission_classes = [TokenHasScope]
    serializer_class = WithdrawSerializer
    lookup_field = 'uuid'
    required_scopes = ['wallet.withdraw:verify']

    def get_queryset(self):
        application_client_id = get_application_client_id(self.request)
        return Transaction.objects.filter(application_client_id=application_client_id).all()

    def retrieve(self, request, *args, **kwargs):
        instance = self.get_object()
        if instance.state == STATE_CHOICES.pending:
            instance.verify()

        serializer = self.get_serializer(instance)
        return Response(serializer.data)


@method_decorator(login_required, name='dispatch')
class TransactionListView(ListView):
    model = Transaction
    template_name = 'wallet/transaction_list.html'

    def get_queryset(self):
        user = self.request.user
        return Transaction.objects.filter(Q(payee=user) | Q(payer=user)).all()