# Copyright 2012 United States Government as represented by the
# Administrator of the National Aeronautics and Space Administration.
# All Rights Reserved.
#
# Copyright 2012 Nebula, Inc.
#
#    Licensed under the Apache License, Version 2.0 (the "License"); you may
#    not use this file except in compliance with the License. You may obtain
#    a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
#    License for the specific language governing permissions and limitations
#    under the License.

"""
Views for managing instance snapshots.
"""
from django.core.urlresolvers import reverse
from django.core.urlresolvers import reverse_lazy
from django.utils.translation import ugettext_lazy as _

from horizon_lib import exceptions
from horizon_lib import forms
from horizon_lib.utils import memoized

from openstack_horizon import api

from openstack_horizon.dashboards.project.images.snapshots \
    import forms as project_forms


class CreateView(forms.ModalFormView):
    form_class = project_forms.CreateSnapshot
    template_name = 'project/images/snapshots/create.html'
    success_url = reverse_lazy("horizon:project:images:index")

    @memoized.memoized_method
    def get_object(self):
        try:
            return api.nova.server_get(self.request,
                                       self.kwargs["instance_id"])
        except Exception:
            redirect = reverse('horizon:project:instances:index')
            exceptions.handle(self.request,
                              _("Unable to retrieve instance."),
                              redirect=redirect)

    def get_initial(self):
        return {"instance_id": self.kwargs["instance_id"]}

    def get_context_data(self, **kwargs):
        context = super(CreateView, self).get_context_data(**kwargs)
        context['instance'] = self.get_object()
        return context
