# vim: tabstop=4 shiftwidth=4 softtabstop=4

# Copyright 2011 United States Government as represented by the
# Administrator of the National Aeronautics and Space Administration.
# All Rights Reserved.
#
# Copyright 2011 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 Swift containers.
"""
import logging
import os

from django import http
from django.contrib import messages
from django import shortcuts

from horizon import api
from horizon import forms
from horizon import tables
from .forms import CreateContainer, UploadObject, CopyObject
from .tables import ContainersTable, ObjectsTable


LOG = logging.getLogger(__name__)


class IndexView(tables.DataTableView):
    table_class = ContainersTable
    template_name = 'nova/containers/index.html'

    def has_more_data(self):
        return self._more

    def get_data(self):
        containers = []
        self._more = None
        marker = self.request.GET.get('marker', None)
        try:
            containers, self._more = api.swift_get_containers(self.request,
                                                              marker=marker)
        except Exception, e:
            msg = _('Unable to retrieve container list.')
            LOG.exception(msg)
            messages.error(self.request, msg)
        return containers


class CreateView(forms.ModalFormView):
    form_class = CreateContainer
    template_name = 'nova/containers/create.html'


class ObjectIndexView(tables.DataTableView):
    table_class = ObjectsTable
    template_name = 'nova/objects/index.html'

    def has_more_data(self):
        return self._more

    def get_data(self):
        containers = []
        self._more = None
        marker = self.request.GET.get('marker', None)
        container_name = self.kwargs['container_name']
        try:
            objects, self._more = api.swift_get_objects(self.request,
                                                           container_name,
                                                           marker=marker)
        except Exception, e:
            msg = _('Unable to retrieve container list.')
            LOG.exception(msg)
            messages.error(self.request, msg)
        return objects

    def get_context_data(self, **kwargs):
        context = super(ObjectIndexView, self).get_context_data(**kwargs)
        context['container_name'] = self.kwargs["container_name"]
        return context


class UploadView(forms.ModalFormView):
    form_class = UploadObject
    template_name = 'nova/objects/upload.html'

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

    def get_context_data(self, **kwargs):
        context = super(UploadView, self).get_context_data(**kwargs)
        context['container_name'] = self.kwargs["container_name"]
        return context


def object_download(request, container_name, object_name):
    obj = api.swift.swift_get_object(request, container_name, object_name)
    # Add the original file extension back on if it wasn't preserved in the
    # name given to the object.
    filename = object_name
    if not os.path.splitext(obj.name)[1]:
        name, ext = os.path.splitext(obj.metadata.get('orig-filename', ''))
        filename = "%s%s" % (object_name, ext)
    object_data = api.swift_get_object_data(request,
                                            container_name,
                                            object_name)
    response = http.HttpResponse()
    response['Content-Disposition'] = 'attachment; filename=%s' % filename
    response['Content-Type'] = 'application/octet-stream'
    for data in object_data:
        response.write(data)
    return response


class CopyView(forms.ModalFormView):
    form_class = CopyObject
    template_name = 'nova/objects/copy.html'

    def get_form_kwargs(self):
        kwargs = super(CopyView, self).get_form_kwargs()
        kwargs['containers'] = [(c.name, c.name) for c in
                                api.swift_get_containers(self.request)[0]]
        return kwargs

    def get_initial(self):
        return {"new_container_name": self.kwargs["container_name"],
                "orig_container_name": self.kwargs["container_name"],
                "orig_object_name": self.kwargs["object_name"],
                "new_object_name": "%s copy" % self.kwargs["object_name"]}

    def get_context_data(self, **kwargs):
        context = super(CopyView, self).get_context_data(**kwargs)
        context['container_name'] = self.kwargs["container_name"]
        context['object_name'] = self.kwargs["object_name"]
        return context
