# Copyright 2012 OpenStack Foundation
# All Rights Reserved.
#
#    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.

from tempest.common.utils import data_utils
from tempest import config
from tempest.openstack.common import log as logging
from tempest.scenario import manager
from tempest.scenario import utils as test_utils
from tempest import test

CONF = config.CONF

LOG = logging.getLogger(__name__)

load_tests = test_utils.load_tests_input_scenario_utils


class TestServerBasicOps(manager.OfficialClientTest):

    """
    This smoke test case follows this basic set of operations:

     * Create a keypair for use in launching an instance
     * Create a security group to control network access in instance
     * Add simple permissive rules to the security group
     * Launch an instance
     * Pause/unpause the instance
     * Suspend/resume the instance
     * Terminate the instance
    """

    def setUp(self):
        super(TestServerBasicOps, self).setUp()
        # Setup image and flavor the test instance
        # Support both configured and injected values
        if not hasattr(self, 'image_ref'):
            self.image_ref = CONF.compute.image_ref
        if not hasattr(self, 'flavor_ref'):
            self.flavor_ref = CONF.compute.flavor_ref
        self.image_utils = test_utils.ImageUtils()
        if not self.image_utils.is_flavor_enough(self.flavor_ref,
                                                 self.image_ref):
            raise self.skipException(
                '{image} does not fit in {flavor}'.format(
                    image=self.image_ref, flavor=self.flavor_ref
                )
            )
        self.run_ssh = CONF.compute.run_ssh and \
            self.image_utils.is_sshable_image(self.image_ref)
        self.ssh_user = self.image_utils.ssh_user(self.image_ref)
        LOG.debug('Starting test for i:{image}, f:{flavor}. '
                  'Run ssh: {ssh}, user: {ssh_user}'.format(
                      image=self.image_ref, flavor=self.flavor_ref,
                      ssh=self.run_ssh, ssh_user=self.ssh_user))

    def add_keypair(self):
        self.keypair = self.create_keypair()

    def create_security_group(self):
        sg_name = data_utils.rand_name('secgroup-smoke')
        sg_desc = sg_name + " description"
        self.secgroup = self.compute_client.security_groups.create(sg_name,
                                                                   sg_desc)
        self.assertEqual(self.secgroup.name, sg_name)
        self.assertEqual(self.secgroup.description, sg_desc)
        self.set_resource('secgroup', self.secgroup)

        # Add rules to the security group
        self._create_loginable_secgroup_rule_nova(secgroup_id=self.secgroup.id)

    def boot_instance(self):
        # Create server with image and flavor from input scenario
        create_kwargs = {
            'key_name': self.keypair.id
        }
        instance = self.create_server(image=self.image_ref,
                                      flavor=self.flavor_ref,
                                      create_kwargs=create_kwargs)
        self.set_resource('instance', instance)

    def terminate_instance(self):
        instance = self.get_resource('instance')
        instance.delete()
        self.remove_resource('instance')

    def verify_ssh(self):
        if self.run_ssh:
            # Obtain a floating IP
            floating_ip = self.compute_client.floating_ips.create()
            # Attach a floating IP
            instance = self.get_resource('instance')
            instance.add_floating_ip(floating_ip)
            # Check ssh
            try:
                linux_client = self.get_remote_client(
                    server_or_ip=floating_ip.ip,
                    username=self.image_utils.ssh_user(self.image_ref),
                    private_key=self.keypair.private_key)
                linux_client.validate_authentication()
            except Exception:
                LOG.exception('ssh to server failed')
                self._log_console_output()
                raise

    @test.services('compute', 'network')
    def test_server_basicops(self):
        self.add_keypair()
        self.create_security_group()
        self.boot_instance()
        self.verify_ssh()
        self.terminate_instance()