from django.utils.decorators import method_decorator
from django.views.generic import View
from django.views.decorators.csrf import csrf_exempt
from django.http import HttpResponse

from paymentwall.pingback import Pingback

from .models import Purchase


@method_decorator(csrf_exempt, name='dispatch')
class PaymentwallCallbackView(View):

    CHARGEBACK = '1'
    CREDIT_CARD_FRAUD = '2'
    ORDER_FRAUD = '3'
    BAD_DATA = '4'
    FAKE_PROXY_USER = '5'
    REJECTED_BY_ADVERTISER = '6'
    DUPLICATED_CONVERSIONS = '7'
    GOODWILL_CREDIT_TAKEN_BACK = '8'
    CANCELLED_ORDER = '9'
    PARTIALLY_REVERSED = '10'

    def get_request_ip(self):
        x_forwarded_for = self.request.META.get('HTTP_X_FORWARDED_FOR')
        if x_forwarded_for:
            ip = x_forwarded_for.split(',')[0]
        else:
            ip = self.request.META.get('REMOTE_ADDR')
        return ip

    def get(self, request, *args, **kwargs):
        pingback = Pingback(request.GET.copy(), self.get_request_ip())

        if pingback.validate():
            cart_id = pingback.get_product().get_id()

            # try:
            #     cart = CartModel.objects.get(pk=cart_id)
            # except CartModel.DoesNotExist:
            #     log.error('Paymentwall pingback: Cant find cart, Paymentwall sent this data: {}'.format(request.GET.copy()))
            #     return HttpResponse(status=403)

            try:
                purchase = Purchase.objects.get(transaction_id=pingback.get_reference_id())
            except Purchase.DoesNotExist:
                # purchase = cart.create_purchase(transaction_id=pingback.get_reference_id())
                pass

            if pingback.is_deliverable():
                purchase.status = Purchase.COMPLETE

            elif pingback.is_cancelable():
                reason = pingback.get_parameter('reason')

                if reason == self.CHARGEBACK or reason == self.CREDIT_CARD_FRAUD or reason == self.ORDER_FRAUD or reason == self.PARTIALLY_REVERSED:
                    purchase.status = Purchase.CHARGEBACK
                elif reason == self.CANCELLED_ORDER:
                    purchase.status = Purchase.REFUNDED
                else:
                    purchase.status = Purchase.ERROR

            elif pingback.is_under_review():
                purchase.status = Purchase.PENDING

            else:
                # log.error('Paymentwall pingback: Unknown pingback type, Paymentwall sent this data: {}'.format(request.GET.copy()))
                pass

            # purchase.save()
            return HttpResponse('OK', status=200)
        else:
            # log.error('Paymentwall pingback: Cant validate pingback, error: {} Paymentwall sent this data: {}'.format(pingback.get_error_summary(), request.GET.copy()))
            pass