# 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.

import logging

from django import http
from django import shortcuts
from django.contrib import messages
from django.core import validators
from django.template.defaultfilters import slugify
from django.utils.translation import ugettext as _
from novaclient import exceptions as novaclient_exceptions

from horizon import api
from horizon import forms


LOG = logging.getLogger(__name__)


class CreateKeypair(forms.SelfHandlingForm):
    name = forms.CharField(max_length="20",
                           label=_("Keypair Name"),
                           validators=[validators.validate_slug],
                           error_messages={'invalid': _('Keypair names may '
                                'only contain letters, numbers, underscores '
                                'and hyphens.')})

    def handle(self, request, data):
        try:
            LOG.info('Creating keypair "%s"' % data['name'])
            keypair = api.keypair_create(request, data['name'])
            response = http.HttpResponse(mimetype='application/binary')
            response['Content-Disposition'] = \
                     'attachment; filename=%s.pem' % slugify(keypair.name)
            response.write(keypair.private_key)
            response['Content-Length'] = str(len(response.content))
            return response
        except novaclient_exceptions.ClientException, e:
            LOG.exception("ClientException in CreateKeyPair")
            messages.error(request,
                           _('Error Creating Keypair: %s') % e.message)
            return shortcuts.redirect(request.build_absolute_uri())


class ImportKeypair(forms.SelfHandlingForm):
    name = forms.CharField(max_length="20", label=_("Keypair Name"),
                 validators=[validators.RegexValidator('\w+')])
    public_key = forms.CharField(label=_("Public Key"), widget=forms.Textarea)

    def handle(self, request, data):
        try:
            LOG.info('Importing keypair "%s"' % data['name'])
            api.keypair_import(request, data['name'], data['public_key'])
            messages.success(request, _('Successfully imported public key: %s')
                                       % data['name'])
            return shortcuts.redirect(
                            'horizon:nova:access_and_security:index')
        except novaclient_exceptions.ClientException, e:
            LOG.exception("ClientException in ImportKeypair")
            messages.error(request,
                           _('Error Importing Keypair: %s') % e.message)
            return shortcuts.redirect(request.build_absolute_uri())
