from django.contrib import messages
from django.contrib.auth.decorators import login_required
from django.http import HttpResponseRedirect
from django.shortcuts import render
from django.urls import reverse
from django.utils.decorators import method_decorator
from django.views.generic import TemplateView, FormView, UpdateView
from oauth2_provider.contrib.rest_framework import TokenHasScope, IsAuthenticatedOrTokenHasScope
from rest_framework import generics
from rest_framework.views import APIView

from apps.core.forms import ChargeForm
from apps.core.models import Charge
from apps.core.serializers import ChargeSerializer
from apps.wallet.constans import StateChoices
from apps.wallet.models import Transaction


# Create your views here.
@method_decorator(login_required, name='dispatch')
class HomeView(TemplateView):
    template_name = 'core/home.html'


class ChargeRequestApiView(generics.CreateAPIView):
    permission_classes = [IsAuthenticatedOrTokenHasScope]
    serializer_class = ChargeSerializer
    required_scopes = ['wallet.wallet:get_balance']
    model = Charge

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

# TODO: refactor
class ChargeView(UpdateView):
    template_name = 'core/charge.html'
    form_class = ChargeForm

    def get_queryset(self):
        return Charge.objects.all()
        # return Charge.objects.filter(state__in=[StateChoices.CREATED.value, StateChoices.SUCCESS.value])

    def form_valid(self, form):
        self.object = form.save()
        amount = form.cleaned_data['amount']
        payer_pk = 'a95557d6-4f21-4717-99c2-354db85f940e'
        charge: Charge = self.get_object()
        try:
            charge.change_state(from_state=StateChoices.CREATED.value, to_state=StateChoices.PENDING.value)
            transaction = Transaction.objects.create(
                uuid= charge.uuid,
                payee_id= charge.user.pk,
                payee_type=1,
                payer_id=payer_pk,
                payer_type=2,
                amount=amount,
                details = {'description': 'شارژ مجازی کیف پول'}
            )
            transaction.submit()
            transaction.verify()
            charge.change_state(from_state=StateChoices.PENDING.value, to_state=StateChoices.SUCCESS.value)
            messages.success(self.request, 'شارژ انجام شد')

        except:
            messages.error(self.request, 'خطایی رخ داده است')
            charge.change_state(from_state=StateChoices.PENDING.value, to_state=StateChoices.EXPECTED_FAILURE.value)

        return HttpResponseRedirect(self.get_success_url())



    def get_success_url(self):
        return reverse('core:charge', kwargs={'pk': self.object.pk})

    # def form_valid(self, form):