class BaseUserPrefsUpdateView(LoginRequiredMixin, UpdateView):
    model = None
    form_class = None
    partial_template_name = None
    template_name = 'userprofile/update_profile.html'

    def get_template_names(self):
        if self.request.is_ajax():
            return self.partial_template_name
        return self.template_name

    def get_context_data(self, **kwargs):
        ctx = super(BaseUserPrefsUpdateView, self).get_context_data(**kwargs)
        ctx.update({'form_template': self.get_template_names()})
        return ctx

    def get_object(self, queryset=None):
        raise NotImplementedError(
            'Must implement get_object in {}'.format(self.__class__.__name__))

    def form_valid(self, form):
        form.save()
        message = 'Profile updated successfully'
        return JsonResponse({'message': message})

    def form_invalid(self, form):
        return self.render_to_response(
            self.get_context_data(form=form), status=400
        )


class UserInfoUpdateView(BaseUserPrefsUpdateView):
    model = User
    form_class = UserInfoForm
    partial_template_name = 'userprofile/_info_form.html'

    def get_object(self, queryset=None):
        queryset = self.get_queryset()
        return queryset.filter(pk=self.request.user.pk).get()

    def form_valid(self, form):
        user = form.save()
        update_user_bydesign.delay(user.id)
        message = 'Personal Information updated successfully'
        return JsonResponse({'message': message})


class UserShippingAddressUpdateView(BaseUserPrefsUpdateView):
    model = Address
    form_class = ShippingAddressForm
    partial_template_name = 'userprofile/_shipping_address_form.html'

    def get_object(self, queryset=None):
        return self.request.user.shipping_address

    def form_valid(self, form):
        address = form.save()
        # FIXME: Address doesn't have a backwards relationship to User so this
        # can't go in the form.save() where it probably should be without
        # passing User in.
        if not self.request.user.shipping_address:
            self.request.user.shipping_address = address
            self.request.user.save()
        message = 'Address updated successfully'
        return JsonResponse({'message': message})


class UserSettingsUpdateView(BaseUserPrefsUpdateView):
    model = UserSettings
    form_class = UserSettingsForm
    partial_template_name = 'userprofile/_contact_preferences_form.html'

    def get_object(self, queryset=None):
        return self.request.user.settings


class UserPasswordUpdateView(BaseUserPrefsUpdateView):
    model = User
    form_class = PasswordChangeForm
    partial_template_name = 'userprofile/_password_change_form.html'

    def get_object(self, queryset=None):
        queryset = self.get_queryset()
        return queryset.filter(pk=self.request.user.pk).get()

    def get_form_kwargs(self):
        kwargs = super(UserPasswordUpdateView, self).get_form_kwargs()
        kwargs.update({'user': kwargs.pop('instance')})
        return kwargs


class StoreFrontOptionsUpdateView(BaseUserPrefsUpdateView):
    model = StoreFront
    form_class = StoreFrontOptionsForm
    partial_template_name = 'userprofile/_storefront_options_form.html'

    def get_object(self, queryset=None):
        return StoreFront.objects.get_or_instantiate_for_user(
            self.request.user
        )


class UserProfileUpdateView(BaseUserPrefsUpdateView):
    model = User
    form_class = UserInfoForm
    partial_template_name = 'userprofile/_info_form.html'

    def get_object(self, queryset=None):
        queryset = self.get_queryset()
        return queryset.filter(pk=self.request.user.pk).get()