dynamicweb2/hosting/views.py

import json
import uuid
import logging

import stripe
from django.conf import settings
from django.contrib.auth import authenticate, login
from django.contrib.auth.tokens import default_token_generator
from django.contrib.auth.mixins import LoginRequiredMixin
from django.contrib.auth.views import LogoutView
from django.core.files.base import ContentFile
from django.http import HttpResponseRedirect, Http404, JsonResponse
from django.urls import reverse_lazy, reverse
from django.utils.decorators import method_decorator
from django.utils.http import urlsafe_base64_decode
from django.utils.safestring import mark_safe
from django.views import View
from django.views.generic import CreateView, TemplateView, FormView, DetailView
from django.utils.translation import gettext_lazy as _, get_language
from django.views.decorators.cache import never_cache, cache_control
from django.contrib import messages
from django.shortcuts import render

from dynamicweb2.ldap_manager import LdapManager
from dynamicweb2.stripe_utils import StripeUtils
from hosting.forms import HostingUserLoginForm, HostingUserSignupForm, ResendActivationEmailForm, \
    PasswordResetRequestForm, UserHostingKeyForm, BillingAddressForm, BillingAddressFormSignup, ProductPaymentForm, \
    GenericPaymentForm
from hosting.mailer import BaseEmail
from hosting.mixins import LoginViewMixin, ResendActivationLinkViewMixin, PasswordResetViewMixin, \
    PasswordResetConfirmViewMixin
from hosting.models import CustomUser, UserHostingKey, GenericProduct, StripeCustomer, HostingOrder, UserCardDetail, \
    BillingAddress, IncompletePaymentIntents, StripeTaxRate, IncompleteSubscriptions
from hosting.utils import get_vat_rate_for_country, validate_vat_number, get_vm_price_for_given_vat, \
    get_all_public_keys, create_incomplete_intent_request, get_error_response_dict, show_error

decorators = [never_cache]

logger = logging.getLogger(__name__)


class LoginView(LoginViewMixin):
    template_name = "hosting/login.html"
    form_class = HostingUserLoginForm
    success_url = reverse_lazy('hosting:dashboard')


class SignupView(CreateView):
    template_name = 'hosting/signup.html'
    form_class = HostingUserSignupForm
    model = CustomUser
    success_url = reverse_lazy('hosting:dashboard')

    def get_success_url(self):
        next_url = self.request.session.get(
            'next', self.success_url)
        return next_url

    def form_valid(self, form):
        name = form.cleaned_data.get('name')
        email = form.cleaned_data.get('email')
        password = form.cleaned_data.get('password')
        this_base_url = "{0}://{1}".format(self.request.scheme,
                                           self.request.get_host())
        CustomUser.register(name, password, email,
                            app='dcl', base_url=this_base_url, send_email=settings.SEND_EMAIL)

        return HttpResponseRedirect(reverse_lazy('hosting:signup-validate'))

    @method_decorator(decorators)
    def get(self, request, *args, **kwargs):
        if self.request.user.is_authenticated:
            return HttpResponseRedirect(self.get_success_url())
        return super(SignupView, self).get(request, *args, **kwargs)


class SignupValidateView(TemplateView):
    template_name = "hosting/signup_validate.html"

    def get_context_data(self, **kwargs):
        context = super(SignupValidateView, self).get_context_data(**kwargs)
        login_url = '<a href="' + \
                    reverse('hosting:login') + '">' + str(_('login')) + '</a>'
        home_url = '<a href="' + \
                   reverse('hosting:login') + '">Data Center Light</a>'
        message = '{signup_success_message} {lurl}</a> \
                 <br />{go_back} {hurl}.'.format(
            signup_success_message=_(
                'Thank you for signing up. We have sent an email to you. '
                'Please follow the instructions in it to activate your '
                'account. Once activated, you can login using'),
            go_back=_('Go back to'),
            lurl=login_url,
            hurl=home_url
        )
        context['message'] = mark_safe(message)
        context['section_title'] = _('Sign up')
        return context


class SignupValidatedView(SignupValidateView):
    template_name = "hosting/signup_validate.html"

    def get_context_data(self, **kwargs):
        context = super(SignupValidateView, self).get_context_data(**kwargs)
        validated = CustomUser.validate_url(self.kwargs['validate_slug'])
        login_url = '<a href="' + \
                    reverse('hosting:login') + '">' + str(_('login')) + '</a>'
        section_title = _('Account activation')
        user = CustomUser.objects.filter(
            validation_slug=self.kwargs['validate_slug']).first()
        if validated:
            message = ('{account_activation_string} <br />'
                       ' {login_string} {lurl}.').format(
                account_activation_string=_(
                    "Your account has been activated."),
                login_string=_("You can now"),
                lurl=login_url)
            email_data = {
                'subject': _('Welcome to Data Center Light!'),
                'to': user.email,
                'context': {
                    'base_url': "{0}://{1}".format(
                        self.request.scheme,
                        self.request.get_host()
                    )
                },
                'template_name': 'welcome_user',
                'template_path': 'datacenterlight/emails/',
                'from_address': settings.DCL_SUPPORT_FROM_ADDRESS,
            }
            email = BaseEmail(**email_data)
            email.send()
        else:
            home_url = '<a href="' + \
                       reverse('hosting:login') + \
                       '">Data Center Light</a>'
            message = '{sorry_message} <br />{go_back_to} {hurl}'.format(
                sorry_message=_("Sorry. Your request is invalid."),
                go_back_to=_('Go back to'),
                hurl=home_url
            )
        context['message'] = mark_safe(message)
        context['section_title'] = section_title
        return context

    @method_decorator(decorators)
    def get(self, request, *args, **kwargs):
        if self.request.user.is_authenticated:
            return HttpResponseRedirect(reverse_lazy('hosting:dashboard'))
        return super(SignupValidatedView, self).get(request, *args, **kwargs)


class ResendActivationEmailView(ResendActivationLinkViewMixin):
    template_name = 'hosting/resend_activation_link.html'
    form_class = ResendActivationEmailForm
    success_url = reverse_lazy('hosting:login')
    email_template_path = 'datacenterlight/emails/'
    email_template_name = 'user_activation'


class PasswordResetView(PasswordResetViewMixin):
    site = 'dcl'
    template_name = 'hosting/reset_password.html'
    form_class = PasswordResetRequestForm
    success_url = reverse_lazy('hosting:login')
    template_email_path = 'hosting/emails/'


class PasswordResetConfirmView(PasswordResetConfirmViewMixin):
    template_name = 'hosting/confirm_reset_password.html'
    success_url = reverse_lazy('hosting:login')

    def post(self, request, uidb64=None, token=None, *arg, **kwargs):
        try:
            uid = urlsafe_base64_decode(uidb64)
            user = CustomUser.objects.get(pk=uid)

            # opennebula_client = OpenNebulaManager(
            #     email=user.username,
            #     password=user.password,
            # )

        except (TypeError, ValueError, OverflowError, CustomUser.DoesNotExist):
            user = None
            opennebula_client = None

        form = self.form_class(request.POST)

        if user is not None and default_token_generator.check_token(user,
                                                                    token):
            if form.is_valid():
                ldap_manager = LdapManager()
                new_password = form.cleaned_data['new_password2']

                # Make sure the user have an ldap account already
                user.create_ldap_account(new_password)

                # We are changing password in ldap before changing in database because
                # ldap have more chances of failure than local database
                if ldap_manager.change_password(user.username, new_password):
                    user.set_password(new_password)
                    user.save()

                    messages.success(request, _('Password has been reset.'))

                    # Change opennebula password
                    opennebula_client.change_user_password(user.password)

                    return self.form_valid(form)

            messages.error(
                request, _('Password reset has not been successful.'))
            form.add_error(None,
                           _('Password reset has not been successful.'))
            return self.form_invalid(form)

        else:
            error_msg = _('The reset password link is no longer valid.')
            messages.error(request, _(error_msg))
            form.add_error(None, error_msg)
            return self.form_invalid(form)


class SSHKeyCreateView(FormView):
    form_class = UserHostingKeyForm
    model = UserHostingKey
    template_name = 'hosting/user_key.html'
    login_url = reverse_lazy('hosting:login')
    context_object_name = "virtual_machine"
    success_url = reverse_lazy('hosting:ssh_keys')

    def get_form_kwargs(self):
        kwargs = super(SSHKeyCreateView, self).get_form_kwargs()
        kwargs.update({'request': self.request})
        return kwargs

    def form_valid(self, form):
        form.save()
        if settings.DCL_SSH_KEY_NAME_PREFIX in form.instance.name:
            content = ContentFile(form.cleaned_data.get('private_key'))
            filename = form.cleaned_data.get(
                'name') + '_' + str(uuid.uuid4())[:8] + '_private.pem'
            form.instance.private_key.save(filename, content)
        context = self.get_context_data()

        next_url = self.request.session.get(
            'next',
            reverse_lazy('hosting:create_virtual_machine')
        )

        if 'next' in self.request.session:
            context.update({
                'next_url': next_url
            })
            del (self.request.session['next'])

        if form.cleaned_data.get('private_key'):
            context.update({
                'private_key': form.cleaned_data.get('private_key'),
                'key_name': form.cleaned_data.get('name'),
                'form': UserHostingKeyForm(request=self.request),
            })

        if self.request.user.is_authenticated:
            owner = self.request.user
            # manager = OpenNebulaManager(
            #     email=owner.username,
            #     password=owner.password
            # )
            # keys_to_save = get_all_public_keys(self.request.user)
            # manager.save_key_in_opennebula_user('\n'.join(keys_to_save))
        else:
            self.request.session["new_user_hosting_key_id"] = form.instance.id
        return HttpResponseRedirect(self.success_url)

    def post(self, request, *args, **kwargs):
        form = self.get_form()
        required = 'add_ssh' in self.request.POST
        form.fields['name'].required = required
        form.fields['public_key'].required = required
        if form.is_valid():
            return self.form_valid(form)
        else:
            return self.form_invalid(form)


class AskSSHKeyView(SSHKeyCreateView):
    form_class = UserHostingKeyForm
    template_name = "hosting/add_ssh_key.html"
    success_url = reverse_lazy('hosting:order_confirmation')
    context_object_name = "dcl_vm_buy_add_ssh_key"

    # @cache_control(no_cache=True, must_revalidate=True, no_store=True)
    def get(self, request, *args, **kwargs):
        context = {
            'site_url': reverse_lazy('hosting:login'),
            # 'cms_integration': get_cms_integration('default'),
            'form': UserHostingKeyForm(request=self.request),
            # 'keys': get_all_public_keys(self.request.user)
        }
        return render(request, self.template_name, context)

    def post(self, request, *args, **kwargs):
        self.success_url = self.request.session.get("order_confirm_url")
        return super(AskSSHKeyView, self).post(self, request, *args, **kwargs)


class IndexView(View):
    template_name = "hosting/index.html"

    def get_context_data(self, **kwargs):
        # TODO refactor below
        templates = []
        data = None

        context = {
            'hosting': "nodejs",
            'hosting_long': "NodeJS",
            'domain': "node-hosting.ch",
            'google_analytics': "UA-62285904-7",
            'email': "info@node-hosting.ch",
            'vm_types': data
            # 'vm_types': VirtualMachineType.get_serialized_vm_types(),
        }
        return context

    @method_decorator(decorators)
    def get(self, request, *args, **kwargs):
        context = self.get_context_data()
        return render(request, self.template_name, context)


class DashboardView(LoginRequiredMixin, View):
    template_name = "hosting/dashboard.html"
    login_url = reverse_lazy('hosting:login')

    def get_context_data(self, **kwargs):
        context = {}
        return context

    @method_decorator(decorators)
    def get(self, request, *args, **kwargs):
        context = self.get_context_data()
        context['has_invoices'] = False
        bills = []
        # try:
        #     if hasattr(self.request.user, 'stripecustomer'):
        #         bills = MonthlyHostingBill.objects.filter(
        #             customer=self.request.user.stripecustomer
        #         )
        #     if len(bills) > 0:
        #         context['has_invoices'] = True
        # except MonthlyHostingBill.DoesNotExist as dne:
        #     logger.error("{}'s monthly hosting bill not imported ?".format(
        #         self.request.user.email
        #     ))
        return render(request, self.template_name, context)


class CustomLogoutView(LogoutView):
    next_page = reverse_lazy('hosting:login')


class PaymentOrderView(FormView):
    template_name = 'hositng/landing_payment.html'

    def get_form_class(self):
        if self.request.user.is_authenticated():
            return BillingAddressForm
        else:
            return BillingAddressFormSignup

    def get_context_data(self, **kwargs):
        context = super(PaymentOrderView, self).get_context_data(**kwargs)
        if 'billing_address_data' in self.request.session:
            billing_address_data = self.request.session['billing_address_data']
        else:
            billing_address_data = {}

        if self.request.user.is_authenticated():
            if billing_address_data:
                billing_address_form = BillingAddressForm(
                    initial=billing_address_data
                )
            else:
                billing_address_form = BillingAddressForm(
                    instance=self.request.user.billing_addresses.order_by('-id').first()
                )
            user = self.request.user
            if hasattr(user, 'stripecustomer'):
                stripe_customer = user.stripecustomer
            else:
                stripe_customer = None
            stripe_utils = StripeUtils()
            cards_list_request = stripe_utils.get_available_payment_methods(
                stripe_customer
            )
            cards_list = cards_list_request.get('response_object')
            context.update({'cards_list': cards_list})
        else:
            billing_address_form = BillingAddressFormSignup(
                initial=billing_address_data
            )

        context.update({
            'stripe_key': settings.STRIPE_API_PUBLIC_KEY,
            'site_url': reverse('hosting:dashboard'),
            'login_form': HostingUserLoginForm(prefix='login_form'),
            'billing_address_form': billing_address_form,
        })

        if ('generic_payment_type' in self.request.session and
                self.request.session['generic_payment_type'] == 'generic'):
            if 'product_id' in self.request.session:
                product = GenericProduct.objects.get(
                    id=self.request.session['product_id']
                )
                context.update({'generic_payment_form': ProductPaymentForm(
                    prefix='generic_payment_form',
                    initial={'product_name': product.product_name,
                             'amount': float(product.get_actual_price()),
                             'recurring': product.product_is_subscription,
                             'description': product.product_description,
                             },
                    product_id=product.id
                ), })
            else:
                context.update({'generic_payment_form': GenericPaymentForm(
                    prefix='generic_payment_form',
                ), })
        else:
            logger.debug(f"VM creation not implemented")

        return context

    @cache_control(no_cache=True, must_revalidate=True, no_store=True)
    def get(self, request, *args, **kwargs):
        request.session.pop('vat_validation_status')
        request.session.pop('card_id')
        request.session.pop('token')
        request.session.pop('id_payment_method')
        logger.debug("Session: %s" % str(request.session))
        for key, value in request.session.items():
            logger.debug("Session: %s %s" % (key, value))
        if (('type' in request.GET and request.GET['type'] == 'generic')
                or 'product_slug' in kwargs):
            request.session['generic_payment_type'] = 'generic'
            if 'generic_payment_details' in request.session:
                request.session.pop('generic_payment_details')
                request.session.pop('product_id')
            if 'product_slug' in kwargs:
                logger.debug("Product slug is " + kwargs['product_slug'])
                try:
                    product = GenericProduct.objects.get(
                        product_slug=kwargs['product_slug']
                    )
                except GenericProduct.DoesNotExist as dne:
                    logger.error(
                        "Product '{}' does "
                        "not exist".format(kwargs['product_slug'])
                    )
                    raise Http404()
                request.session['product_id'] = product.id
        elif 'specs' not in request.session:
            return HttpResponseRedirect(reverse('hosting:dashboard'))
        return self.render_to_response(self.get_context_data())

    def post(self, request, *args, **kwargs):
        if 'product' in request.POST:
            # query for the supplied product
            product = None
            try:
                product = GenericProduct.objects.get(
                    id=request.POST['generic_payment_form-product_name']
                )
            except GenericProduct.DoesNotExist as dne:
                logger.error(
                    "The requested product '{}' does not exist".format(
                        request.POST['generic_payment_form-product_name']
                    )
                )
            except GenericProduct.MultipleObjectsReturned as mpe:
                logger.error(
                    "There seem to be more than one product with "
                    "the name {}".format(
                        request.POST['generic_payment_form-product_name']
                    )
                )
                product = GenericProduct.objects.all(
                    product_name=request.
                    POST['generic_payment_form-product_name']
                ).first()
            if product is None:
                return JsonResponse({})
            else:
                return JsonResponse({
                    'amount': product.get_actual_price(),
                    'isSubscription': product.product_is_subscription
                })
        if 'login_form' in request.POST:
            login_form = HostingUserLoginForm(
                data=request.POST, prefix='login_form'
            )
            if login_form.is_valid():
                email = login_form.cleaned_data.get('email')
                password = login_form.cleaned_data.get('password')
                auth_user = authenticate(email=email, password=password)
                if auth_user:
                    login(self.request, auth_user)
                    if 'product_slug' in kwargs:
                        return HttpResponseRedirect(
                            reverse('show_product',
                                    kwargs={
                                        'product_slug': kwargs['product_slug']}
                                    )
                        )
                    return HttpResponseRedirect(
                        reverse('hosting:payment')
                    )
            else:
                context = self.get_context_data()
                context['login_form'] = login_form
                return self.render_to_response(context)
        if request.user.is_authenticated():
            address_form = BillingAddressForm(
                data=request.POST,
            )
        else:
            address_form = BillingAddressFormSignup(
                data=request.POST,
            )
        if address_form.is_valid():
            # Check if we are in a generic payment case and handle the generic
            # payment details form before we go on to verify payment
            if ('generic_payment_type' in request.session and
                    self.request.session['generic_payment_type'] == 'generic'):
                if 'product_id' in request.session:
                    generic_payment_form = ProductPaymentForm(
                        data=request.POST, prefix='generic_payment_form',
                        product_id=request.session['product_id']
                    )
                else:
                    generic_payment_form = GenericPaymentForm(
                        data=request.POST, prefix='generic_payment_form'
                    )
                if generic_payment_form.is_valid():
                    logger.debug("Generic payment form is valid.")
                    if 'product_id' in request.session:
                        product = generic_payment_form.product
                    else:
                        product = generic_payment_form.cleaned_data.get(
                            'product_name'
                        )
                    user_country_vat_rate = get_vat_rate_for_country(
                        address_form.cleaned_data["country"]
                    )
                    gp_details = {
                        "product_name": product.product_name,
                        "vat_rate": 0 if product.exclude_vat_calculations else
                        user_country_vat_rate * 100,
                        "vat_amount": 0 if product.exclude_vat_calculations
                        else round(
                            float(product.product_price) *
                            user_country_vat_rate, 2),
                        "vat_country": address_form.cleaned_data["country"],
                        "amount_before_vat": round(
                            float(product.product_price), 2),
                        "amount": product.get_actual_price(
                            vat_rate=get_vat_rate_for_country(
                                address_form.cleaned_data["country"])
                        ),
                        "recurring": generic_payment_form.cleaned_data.get(
                            'recurring'
                        ),
                        "description": generic_payment_form.cleaned_data.get(
                            'description'
                        ),
                        "product_id": product.id,
                        "product_slug": product.product_slug,
                        "recurring_interval":
                            product.product_subscription_interval,
                        "exclude_vat_calculations": product.exclude_vat_calculations
                    }
                    request.session["generic_payment_details"] = (
                        gp_details
                    )
                else:
                    logger.debug("Generic payment form invalid")
                    context = self.get_context_data()
                    context['generic_payment_form'] = generic_payment_form
                    context['billing_address_form'] = address_form
                    return self.render_to_response(context)
            id_payment_method = self.request.POST.get('id_payment_method',
                                                      None)
            if id_payment_method == 'undefined':
                id_payment_method = address_form.cleaned_data.get('card')
            request.session["id_payment_method"] = id_payment_method
            logger.debug("id_payment_method is %s" % id_payment_method)
            if request.user.is_authenticated():
                this_user = {
                    'email': request.user.email,
                    'name': request.user.name
                }
                customer = StripeCustomer.get_or_create(
                    email=this_user.get('email'),
                    id_payment_method=id_payment_method
                )
            else:
                user_email = address_form.cleaned_data.get('email')
                user_name = address_form.cleaned_data.get('name')
                this_user = {
                    'email': user_email,
                    'name': user_name
                }
                try:
                    custom_user = CustomUser.objects.get(email=user_email)
                    customer = StripeCustomer.objects.filter(
                        user_id=custom_user.id).first()
                    if customer is None:
                        logger.debug(
                            ("User {email} is already registered with us."
                             "But, StripeCustomer does not exist for {email}."
                             "Hence, creating a new StripeCustomer.").format(
                                email=user_email
                            )
                        )
                        customer = StripeCustomer.create_stripe_api_customer(
                            email=user_email,
                            id_payment_method=id_payment_method,
                            customer_name=user_name)
                except CustomUser.DoesNotExist:
                    logger.debug(
                        ("StripeCustomer does not exist for {email}."
                         "Hence, creating a new StripeCustomer.").format(
                            email=user_email
                        )
                    )
                    customer = StripeCustomer.create_stripe_api_customer(
                        email=user_email,
                        id_payment_method=id_payment_method,
                        customer_name=user_name)

            billing_address = address_form.save()
            request.session["billing_address_id"] = billing_address.id
            request.session['billing_address_data'] = address_form.cleaned_data
            request.session['user'] = this_user
            # Get or create stripe customer
            if not customer:
                address_form.add_error(
                    "__all__", "Invalid credit card"
                )
                return self.render_to_response(
                    self.get_context_data(
                        billing_address_form=address_form
                    )
                )
            if type(customer) is StripeCustomer:
                request.session['customer'] = customer.stripe_id
            else:
                request.session['customer'] = customer

            vat_number = address_form.cleaned_data.get('vat_number').strip()
            if vat_number:
                validate_result = validate_vat_number(
                    stripe_customer_id=request.session['customer'],
                    billing_address_id=billing_address.id
                )

                if 'error' in validate_result and validate_result['error']:
                    messages.add_message(
                        request, messages.ERROR, validate_result["error"],
                        extra_tags='vat_error'
                    )
                    return HttpResponseRedirect(
                        reverse('hosting:payment') + '#vat_error'
                    )
                request.session["vat_validation_status"] = validate_result["status"]

            # For generic payment we take the user directly to confirmation
            if ('generic_payment_type' in request.session and
                    self.request.session['generic_payment_type'] == 'generic'):
                return HttpResponseRedirect(
                    reverse('hosting:order_confirmation'))
            else:
                self.request.session['order_confirm_url'] = reverse('hosting:order_confirmation')
                return HttpResponseRedirect(
                    reverse('hosting:add_ssh_key'))
        else:
            context = self.get_context_data()
            context['billing_address_form'] = address_form
            return self.render_to_response(context)


class OrderConfirmationView(DetailView, FormView):
    form_class = UserHostingKeyForm
    template_name = "hosting/order_detail.html"
    payment_template_name = 'hosting/landing_payment.html'
    context_object_name = "order"
    model = HostingOrder

    def get_form_kwargs(self):
        kwargs = super(OrderConfirmationView, self).get_form_kwargs()
        kwargs.update({'request': self.request})
        return kwargs

    @cache_control(no_cache=True, must_revalidate=True, no_store=True)
    def get(self, request, *args, **kwargs):
        context = {}
        # this is amount to be charge/subscribed before VAT and discount
        # and expressed in chf. To convert to cents, multiply by 100
        amount_to_charge = 0
        vm_specs = None
        if (('specs' not in request.session or 'user' not in request.session)
                and 'generic_payment_type' not in request.session):
            return HttpResponseRedirect(reverse('hosting:dashboards'))
        if 'id_payment_method' in self.request.session:
            payment_method = self.request.session['id_payment_method']
            logger.debug("id_payment_method: %s" % payment_method)
            stripe_utils = StripeUtils()
            card_details = stripe_utils.get_cards_details_from_payment_method(
                payment_method
            )
            if not card_details.get('response_object'):
                return HttpResponseRedirect(reverse('hosting:payment'))
            card_details_response = card_details['response_object']
            context['cc_last4'] = card_details_response['last4']
            context['cc_brand'] = card_details_response['brand']
            context['cc_exp_year'] = card_details_response['exp_year']
            context['cc_exp_month'] = '{:02d}'.format(
                card_details_response['exp_month'])
            context['id_payment_method'] = payment_method
        else:
            # TODO check when we go through this case (to me, it seems useless)
            card_id = self.request.session.get('card_id')
            logger.debug("NO id_payment_method, using card: %s" % card_id)
            card_detail = UserCardDetail.objects.get(id=card_id)
            context['cc_last4'] = card_detail.last4
            context['cc_brand'] = card_detail.brand
            context['cc_exp_year'] = card_detail.exp_year
            context['cc_exp_month'] = '{:02d}'.format(card_detail.exp_month)

        if ('generic_payment_type' in request.session and
                self.request.session['generic_payment_type'] == 'generic'):
            if "vat_validation_status" in request.session and (
                    request.session["vat_validation_status"] == "verified" or
                    request.session["vat_validation_status"] == "not_needed"):
                request.session['generic_payment_details']['vat_rate'] = 0
                request.session['generic_payment_details']['vat_amount'] = 0
                request.session['generic_payment_details']['amount'] = (
                    request.session['generic_payment_details']['amount_before_vat']
                )
            context.update({
                'generic_payment_details':
                    request.session['generic_payment_details'],
            })
            amount_to_charge = request.session['generic_payment_details']['amount']
        else:
            vm_specs = request.session.get('specs')
            user_vat_country = (
                request.session.get('billing_address_data').get("country")
            )
            user_country_vat_rate = get_vat_rate_for_country(user_vat_country)
            price, vat, vat_percent, discount = get_vm_price_for_given_vat(
                cpu=vm_specs['cpu'],
                memory=vm_specs['memory'],
                ssd_size=vm_specs['disk_size'],
                pricing_name=vm_specs['pricing_name'],
                vat_rate=user_country_vat_rate * 100
            )
            vm_specs["price"] = price
            vm_specs["price_after_discount"] = price - discount["amount"]
            amount_to_charge = price
            vat_number = request.session.get('billing_address_data').get("vat_number")
            billing_address = BillingAddress.objects.get(
                id=request.session["billing_address_id"])
            if vat_number:
                validate_result = validate_vat_number(
                    stripe_customer_id=request.session['customer'],
                    billing_address_id=billing_address.id
                )
                if 'error' in validate_result and validate_result['error']:
                    messages.add_message(
                        request, messages.ERROR, validate_result["error"],
                        extra_tags='vat_error'
                    )
                    return HttpResponseRedirect(
                        reverse('datacenterlight:payment') + '#vat_error'
                    )
                request.session["vat_validation_status"] = validate_result["status"]

            if user_vat_country.lower() == "ch":
                vm_specs["vat"] = vat
                vm_specs["vat_percent"] = vat_percent
                vm_specs["vat_validation_status"] = "ch_vat"
            elif ("vat_validation_status" in request.session and
                  (request.session["vat_validation_status"] == "verified" or
                   request.session["vat_validation_status"] == "not_needed")):
                vm_specs["vat_percent"] = 0
                vm_specs["vat"] = 0
                vm_specs["vat_validation_status"] = request.session["vat_validation_status"]
            else:
                vm_specs["vat"] = vat
                vm_specs["vat_percent"] = vat_percent
                vm_specs["vat_validation_status"] = request.session[
                    "vat_validation_status"] if "vat_validation_status" in request.session else ""
            vm_specs["vat_country"] = user_vat_country
            vm_specs["price_with_vat"] = round(price * (1 + vm_specs["vat_percent"] * 0.01), 2)
            vm_specs["price_after_discount"] = round(price - discount['amount'], 2)
            vm_specs["price_after_discount_with_vat"] = round(
                (price - discount['amount']) * (1 + vm_specs["vat_percent"] * 0.01), 2)
            discount["amount_with_vat"] = round(vm_specs["price_with_vat"] - vm_specs["price_after_discount_with_vat"],
                                                2)
            vm_specs["total_price"] = vm_specs["price_after_discount_with_vat"]
            vm_specs["discount"] = discount
            logger.debug(vm_specs)
            request.session['specs'] = vm_specs

            context.update({
                'vm': vm_specs,
                'form': UserHostingKeyForm(request=self.request),
                'keys': get_all_public_keys(self.request.user)
            })

        is_subscription = False
        if ('generic_payment_type' not in request.session or
                (request.session['generic_payment_details']['recurring'])):
            # Obtain PaymentIntent so that we can initiate and charge
            # the customer
            is_subscription = True
            logger.debug("CASE: Subscription")
        else:
            logger.debug("CASE: One time payment")
            stripe_utils = StripeUtils()
            payment_intent_response = stripe_utils.get_payment_intent(
                int(amount_to_charge * 100),
                customer=request.session['customer']
            )
            payment_intent = payment_intent_response.get(
                'response_object')
            if not payment_intent:
                logger.error("Could not create payment_intent %s" %
                             str(payment_intent_response))
            else:
                logger.debug("payment_intent.client_secret = %s" %
                             str(payment_intent.client_secret))
            context.update({
                'payment_intent_secret': payment_intent.client_secret
            })
            logger.debug("Request %s" % create_incomplete_intent_request(
                self.request))
            logger.debug("%s" % str(payment_intent))
            logger.debug("customer %s" % request.session['customer'])
            logger.debug("card_details_response %s" % card_details_response)
            logger.debug("request.session[generic_payment_details] %s" % request.session["generic_payment_details"])
            logger.debug("request.session[billing_address_data] %s" % request.session["billing_address_data"])
            IncompletePaymentIntents.objects.create(
                request=create_incomplete_intent_request(self.request),
                payment_intent_id=payment_intent.id,
                stripe_api_cus_id=request.session['customer'],
                card_details_response=json.dumps(card_details_response),
                stripe_subscription_id=None,
                stripe_charge_id=None,
                gp_details=json.dumps(request.session["generic_payment_details"]),
                billing_address_data=json.dumps(request.session["billing_address_data"])
            )
            logger.debug("IncompletePaymentIntent done")

        context.update({
            'site_url': reverse('datacenterlight:index'),
            'page_header_text': _('Confirm Order'),
            'billing_address_data': (
                request.session.get('billing_address_data')
            ),
            #'cms_integration': get_cms_integration('default'),
            'error_msg': get_error_response_dict("Error", request),
            'success_msg': {
                'msg_title': _("Thank you !"),
                'msg_body': _("Your product will be provisioned as soon as "
                              "we receive the payment."),
                'redirect': reverse('hosting:invoices') if
                request.user.is_authenticated() else
                reverse('datacenterlight:index')
            },
            'stripe_key': settings.STRIPE_API_PUBLIC_KEY,
            'is_subscription': str(is_subscription).lower()
        })
        return render(request, self.template_name, context)

    def post(self, request, *args, **kwargs):
        stripe_onetime_charge = None
        stripe_customer_obj = None
        gp_details = None
        specs = None
        vm_template_id = 0
        template = None
        user = request.session.get('user')
        stripe_api_cus_id = request.session.get('customer')
        stripe_utils = StripeUtils()
        logger.debug("user=%s stripe_api_cus_id=%s" % (user, stripe_api_cus_id))
        card_details_response = None
        new_user_hosting_key_id = None
        card_id = None
        generic_payment_type = None
        generic_payment_details = None
        stripe_subscription_obj = None
        if 'generic_payment_details' in request.session:
            generic_payment_details = request.session[
                'generic_payment_details']
        if 'generic_payment_type' in request.session:
            generic_payment_type = request.session['generic_payment_type']
        if 'new_user_hosting_key_id' in self.request.session:
            new_user_hosting_key_id = request.session[
                'new_user_hosting_key_id']
        if 'card_id' in request.session:
            card_id = request.session.get('card_id')
        req = {
            'scheme': self.request.scheme,
            'host': self.request.get_host(),
            'language': get_language(),
            'new_user_hosting_key_id': new_user_hosting_key_id,
            'card_id': card_id,
            'generic_payment_type': generic_payment_type,
            'generic_payment_details': generic_payment_details,
            'user': user
        }

        if 'id_payment_method' in request.session:
            card_details = stripe_utils.get_cards_details_from_payment_method(
                request.session.get('id_payment_method')
            )
            logger.debug(
                "card_details=%s" % (card_details))
            if not card_details.get('response_object'):
                msg = card_details.get('error')
                return show_error(msg, self.request)
            card_details_response = card_details['response_object']
            card_details_dict = {
                'last4': card_details_response['last4'],
                'brand': card_details_response['brand'],
                'card_id': card_details_response['card_id']
            }
            stripe_customer_obj = StripeCustomer.objects.filter(
                stripe_id=stripe_api_cus_id).first()
            if stripe_customer_obj:
                ucd = UserCardDetail.get_user_card_details(
                    stripe_customer_obj, card_details_response
                )
                if not ucd:
                    acc_result = stripe_utils.associate_customer_card(
                        stripe_api_cus_id, request.session['id_payment_method'],
                        set_as_default=True
                    )
                    if acc_result['response_object'] is None:
                        msg = _(
                            'An error occurred while associating the card.'
                            ' Details: {details}'.format(
                                details=acc_result['error']
                            )
                        )
                        return show_error(msg, self.request)
            else:
                # Associate PaymentMethod with the stripe customer
                # and set it as the default source
                acc_result = stripe_utils.associate_customer_card(
                    stripe_api_cus_id, request.session['id_payment_method'],
                    set_as_default=True
                )
                if acc_result['response_object'] is None:
                    msg = _(
                        'An error occurred while associating the card.'
                        ' Details: {details}'.format(
                            details=acc_result['error']
                        )
                    )
                    return show_error(msg, self.request)
        elif 'card_id' in request.session:
            card_id = request.session.get('card_id')
            user_card_detail = UserCardDetail.objects.get(id=card_id)
            card_details_dict = {
                'last4': user_card_detail.last4,
                'brand': user_card_detail.brand,
                'card_id': user_card_detail.card_id
            }
            UserCardDetail.set_default_card(
                stripe_api_cus_id=stripe_api_cus_id,
                stripe_source_id=user_card_detail.card_id
            )
            logger.debug("card_details_dict=%s" % card_details_dict)
        else:
            response = {
                'status': False,
                'redirect': "{url}#{section}".format(
                    url=reverse('datacenterlight:payment'),
                    section='payment_error'),
                'msg_title': str(_('Error.')),
                'msg_body': str(
                    _('There was a payment related error.'
                      ' On close of this popup, you will be redirected back to'
                      ' the payment page.'))
            }
            return JsonResponse(response)

        if ('generic_payment_type' in request.session and
                self.request.session['generic_payment_type'] == 'generic'):
            gp_details = self.request.session['generic_payment_details']
            logger.debug("gp_details=%s" % gp_details)
            if gp_details['recurring']:
                # generic recurring payment
                logger.debug("Commencing a generic recurring payment")
        if ('generic_payment_type' not in request.session or
                (request.session['generic_payment_details']['recurring'])):
            recurring_interval = 'month'
            logger.debug("'generic_payment_type' not in request.session or"
                         "(request.session['generic_payment_details']['recurring']")
            if 'generic_payment_details' in request.session:
                vat_percent = request.session['generic_payment_details']['vat_rate']
                vat_country = request.session['generic_payment_details']['vat_country']
                if 'discount' in request.session['generic_payment_details']:
                    discount = request.session['generic_payment_details']['discount']
                else:
                    discount = {'name': '', 'amount': 0, 'coupon_id': ''}
                amount_to_be_charged = (
                    round(
                        request.session['generic_payment_details']['amount_before_vat'],
                        2
                    )
                )
                plan_name = "generic-{0}-{1:.2f}".format(
                    request.session['generic_payment_details']['product_id'],
                    amount_to_be_charged
                )
                stripe_plan_id = plan_name
                recurring_interval = request.session['generic_payment_details']['recurring_interval']
                if recurring_interval == "year":
                    plan_name = "{}-yearly".format(plan_name)
                    stripe_plan_id = plan_name
            else:
                template = request.session.get('template')
                specs = request.session.get('specs')
                vm_template_id = template.get('id', 1)

                cpu = specs.get('cpu')
                memory = specs.get('memory')
                disk_size = specs.get('disk_size')
                amount_to_be_charged = specs.get('price')
                vat_percent = specs.get('vat_percent')
                vat_country = specs.get('vat_country')
                discount = specs.get('discount')
                plan_name = StripeUtils.get_stripe_plan_name(
                    cpu=cpu,
                    memory=memory,
                    disk_size=disk_size,
                    price=amount_to_be_charged
                )
                stripe_plan_id = StripeUtils.get_stripe_plan_id(
                    cpu=cpu,
                    ram=memory,
                    ssd=disk_size,
                    version=1,
                    app='dcl',
                    price=amount_to_be_charged
                )
                logger.debug(specs)
            stripe_plan = stripe_utils.get_or_create_stripe_plan(
                amount=amount_to_be_charged,
                name=plan_name,
                stripe_plan_id=stripe_plan_id,
                interval=recurring_interval
            )
            # Create StripeTaxRate if applicable to the user
            logger.debug("vat_percent = %s, vat_country = %s" %
                         (vat_percent, vat_country)
                         )
            stripe_tax_rate = None
            if vat_percent > 0:
                try:
                    stripe_tax_rate = StripeTaxRate.objects.get(
                        description="VAT for %s" % vat_country
                    )
                    print("Stripe Tax Rate exists")
                except StripeTaxRate.DoesNotExist as dne:
                    print("StripeTaxRate does not exist")
                    tax_rate_obj = stripe.TaxRate.create(
                        display_name="VAT",
                        description="VAT for %s" % vat_country,
                        jurisdiction=vat_country,
                        percentage=vat_percent,
                        inclusive=False,
                    )
                    stripe_tax_rate = StripeTaxRate.objects.create(
                        display_name=tax_rate_obj.display_name,
                        description=tax_rate_obj.description,
                        jurisdiction=tax_rate_obj.jurisdiction,
                        percentage=tax_rate_obj.percentage,
                        inclusive=False,
                        tax_rate_id=tax_rate_obj.id
                    )
                    logger.debug("Created StripeTaxRate %s" %
                                 stripe_tax_rate.tax_rate_id)
            subscription_result = stripe_utils.subscribe_customer_to_plan(
                stripe_api_cus_id,
                [{"plan": stripe_plan.get('response_object').stripe_plan_id}],
                coupon=(discount['stripe_coupon_id']
                        if 'name' in discount and
                           discount['name'] is not None and
                           'ipv6' in discount['name'].lower() and
                           discount['stripe_coupon_id']
                        else ""),
                tax_rates=[stripe_tax_rate.tax_rate_id] if stripe_tax_rate else [],
                default_payment_method=request.session['id_payment_method']
            )
            stripe_subscription_obj = subscription_result.get('response_object')
            logger.debug(stripe_subscription_obj)
            latest_invoice = stripe.Invoice.retrieve(
                stripe_subscription_obj.latest_invoice)
            subscription_status = ''
            if stripe_subscription_obj:
                subscription_status = stripe_subscription_obj.status

            # Check if the subscription was approved and is active
            if (stripe_subscription_obj is None
                    or (stripe_subscription_obj.status != 'active'
                        and stripe_subscription_obj.status != 'incomplete')):
                # At this point, we have created a Stripe API card and
                # associated it with the customer; but the transaction failed
                # due to some reason. So, we would want to dissociate this card
                # here.
                # ...
                msg = subscription_result.get('error')
                return show_error(msg, self.request)
            elif stripe_subscription_obj.status == 'incomplete':
                # Store params so that they can be retrieved later
                IncompleteSubscriptions.objects.create(
                    subscription_id=stripe_subscription_obj.id,
                    subscription_status=subscription_status,
                    name=user.get('name'),
                    email=user.get('email'),
                    request=json.dumps(req),
                    stripe_api_cus_id=stripe_api_cus_id,
                    card_details_response=json.dumps(card_details_response),
                    stripe_subscription_obj=json.dumps(
                        stripe_subscription_obj) if stripe_customer_obj else '',
                    stripe_onetime_charge=json.dumps(
                        stripe_onetime_charge) if stripe_onetime_charge else '',
                    gp_details=json.dumps(gp_details) if gp_details else '',
                    specs=json.dumps(specs) if specs else '',
                    vm_template_id=vm_template_id if vm_template_id else 0,
                    template=json.dumps(template) if template else '',
                    billing_address_data=json.dumps(
                        request.session.get('billing_address_data')
                    )
                )
                pi = stripe.PaymentIntent.retrieve(
                    latest_invoice.payment_intent
                )
                # TODO: requires_attention is probably wrong value to compare
                if request.user.is_authenticated():
                    if 'generic_payment_details' in request.session:
                        redirect_url = reverse('hosting:invoices')
                    else:
                        redirect_url = reverse('hosting:virtual_machines')
                else:
                    redirect_url = reverse('datacenterlight:index')

                if (pi.status == 'requires_attention' or
                        pi.status == 'requires_source_action'):
                    logger.debug("Display SCA authentication %s " % pi.status)
                    context = {
                        'sid': stripe_subscription_obj.id,
                        'payment_intent_secret': pi.client_secret,
                        'STRIPE_PUBLISHABLE_KEY': settings.STRIPE_API_PUBLIC_KEY,
                        'showSCA': True,
                        'success': {
                            'status': True,
                            'redirect': redirect_url,
                            'msg_title': str(_('Thank you for the order.')),
                            'msg_body': str(
                                _('Your product will be provisioned as soon as'
                                  ' we receive a payment confirmation from '
                                  'Stripe. We will send you a confirmation '
                                  'email. You can always contact us at '
                                  'support@datacenterlight.ch')
                            )
                        },
                        'error': {
                            'status': False,
                            'redirect': "{url}#{section}".format(
                                url=(reverse(
                                    'show_product',
                                    kwargs={'product_slug':
                                                request.session[
                                                    'generic_payment_details']
                                                ['product_slug']}
                                ) if 'generic_payment_details' in request.session else
                                     reverse('datacenterlight:payment')
                                     ),
                                section='payment_error'
                            ),
                            'msg_title': str(_('Error.')),
                            'msg_body': str(
                                _('There was a payment related error.'
                                  ' On close of this popup, you will be redirected back to'
                                  ' the payment page.')
                            )
                        }
                    }
                    return JsonResponse(context)
                else:
                    logger.debug(
                        "Handle this case when "
                        "stripe.subscription_status is incomplete but "
                        "pi.status is neither requires_attention nor "
                        "requires_source_action")
                    msg = subscription_result.get('error')
                    return show_error(msg, self.request)
        # the code below is executed for
        # a) subscription case
        # b) the subscription object is active itself, without requiring
        #    SCA
        # provisioning_response = do_provisioning(
        #     req, stripe_api_cus_id,
        #     card_details_response, stripe_subscription_obj,
        #     stripe_onetime_charge, gp_details, specs, vm_template_id,
        #     template, request.session.get('billing_address_data'),
        #     self.request
        # )

        if (provisioning_response and
                type(provisioning_response['response']) == JsonResponse):
            new_user = provisioning_response.get('user', None)
            if new_user:
                login(self.request, new_user)
            return provisioning_response['response']

        response = {
            'status': True,
            'redirect': (
                reverse('hosting:virtual_machines')
                if request.user.is_authenticated()
                else reverse('datacenterlight:index')
            ),
            'msg_title': str(_('Thank you for the order.')),
            'msg_body': str(
                _('Your VM will be up and running in a few moments.'
                  ' We will send you a confirmation email as soon as'
                  ' it is ready.'))
        }

        return JsonResponse(response)