# Copyright 2015 Wind River Systems, 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.
#
# Copyright (c) 2015 Wind River Systems, Inc.
#
# The right to copy, distribute, modify, or otherwise make use
# of this software may be licensed only pursuant to the terms
# of an applicable Wind River license agreement.
#

import logging

from django.core.urlresolvers import reverse
from django import shortcuts
from django.utils.translation import ugettext_lazy as _
import netaddr

from horizon import forms
from horizon import messages
from openstack_dashboard import api

LOG = logging.getLogger(__name__)


class CreateAddress(forms.SelfHandlingForm):
    host_id = forms.CharField(widget=forms.HiddenInput())
    interface_id = forms.CharField(widget=forms.HiddenInput())
    success_url = 'horizon:admin:inventory:viewinterface'
    failure_url = 'horizon:admin:inventory:viewinterface'

    ip_address = forms.IPField(
        label=_("IP Address"),
        required=True,
        initial="",
        help_text=_("IP interface address in CIDR format "
                    "(e.g. 192.168.0.2/24, 2001:DB8::/48"),
        version=forms.IPv4 | forms.IPv6,
        mask=True)

    def handle(self, request, data):
        try:
            ip_address = netaddr.IPNetwork(data['ip_address'])
            body = {'interface_uuid': data['interface_id'],
                    'address': str(ip_address.ip),
                    'prefix': ip_address.prefixlen}
            address = api.sysinv.address_create(request, **body)
            msg = (_('Address %(address)s/%(prefix)s was '
                     'successfully created') % body)
            messages.success(request, msg)
            return address
        except Exception as e:
            # Allow REST API error message to appear on UI
            messages.error(request, e)
            LOG.error(e)
            # Redirect to failure page
            redirect = reverse(self.failure_url,
                               args=(data['host_id'], data['interface_id']))
            return shortcuts.redirect(redirect)