# Copyright 2013 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.

import os
import subprocess

from proboscis.asserts import fail
import tenacity

from trove import tests
from trove.tests.config import CONFIG
from trove.tests import util
from trove.tests.util.users import Requirements


def create_server_connection(instance_id, ip_address=None):
    if util.test_config.use_local_ovz:
        return OpenVZServerConnection(instance_id)
    return ServerSSHConnection(instance_id, ip_address=ip_address)


class ServerSSHConnection(object):
    def __init__(self, instance_id, ip_address=None):
        if not ip_address:
            req_admin = Requirements(is_admin=True)
            user = util.test_config.users.find_user(req_admin)
            dbaas_admin = util.create_dbaas_client(user)
            instance = dbaas_admin.management.show(instance_id)

            mgmt_interfaces = instance.server["addresses"].get(
                CONFIG.trove_mgmt_network, []
            )
            mgmt_addresses = [str(inf["addr"]) for inf in mgmt_interfaces
                              if inf["version"] == 4]

            if len(mgmt_addresses) == 0:
                fail("No IPV4 ip found for management network.")
            else:
                self.ip_address = mgmt_addresses[0]
        else:
            self.ip_address = ip_address

        TROVE_TEST_SSH_USER = os.environ.get('TROVE_TEST_SSH_USER')
        if TROVE_TEST_SSH_USER and '@' not in self.ip_address:
            self.ip_address = TROVE_TEST_SSH_USER + '@' + self.ip_address

    @tenacity.retry(
        wait=tenacity.wait_fixed(5),
        stop=tenacity.stop_after_attempt(3),
        retry=tenacity.retry_if_exception_type(subprocess.CalledProcessError)
    )
    def execute(self, cmd):
        exe_cmd = "%s %s %s" % (tests.SSH_CMD, self.ip_address, cmd)
        print("RUNNING COMMAND: %s" % exe_cmd)

        output = util.process(exe_cmd)

        print("OUTPUT: %s" % output)
        return output


class OpenVZServerConnection(object):
    def __init__(self, instance_id):
        self.instance_id = instance_id
        req_admin = Requirements(is_admin=True)
        self.user = util.test_config.users.find_user(req_admin)
        self.dbaas_admin = util.create_dbaas_client(self.user)
        self.instance = self.dbaas_admin.management.show(self.instance_id)
        self.instance_local_id = self.instance.server["local_id"]

    def execute(self, cmd):
        exe_cmd = "sudo vzctl exec %s %s" % (self.instance_local_id, cmd)
        print("RUNNING COMMAND: %s" % exe_cmd)
        return util.process(exe_cmd)
