##############################################################################
# Copyright (c) 2016 Huawei Technologies Co.,Ltd and others.
#
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0
##############################################################################
from __future__ import absolute_import

import logging

import pkg_resources
from oslo_serialization import jsonutils

import yardstick.ssh as ssh
from yardstick.benchmark.scenarios import base

LOG = logging.getLogger(__name__)


class NetworkCapacity(base.Scenario):
    """Measure Network capacity and scale.

    This scenario reads network status including number of connections,
    number of frames sent/received.
    """
    __scenario_type__ = "NetworkCapacity"
    TARGET_SCRIPT = "networkcapacity.bash"

    def __init__(self, scenario_cfg, context_cfg):
        self.scenario_cfg = scenario_cfg
        self.context_cfg = context_cfg
        self.setup_done = False

    def setup(self):
        """scenario setup"""
        self.target_script = pkg_resources.resource_filename(
            "yardstick.benchmark.scenarios.networking",
            NetworkCapacity.TARGET_SCRIPT)

        host = self.context_cfg['host']
        if host is None:
            raise RuntimeError('No right node.please check the configuration')

        self.client = ssh.SSH.from_node(host, defaults={"user": "ubuntu"})
        self.client.wait(timeout=600)

        # copy script to host
        self.client._put_file_shell(self.target_script, '~/networkcapacity.sh')

        self.setup_done = True

    def run(self, result):
        """execute the benchmark"""

        if not self.setup_done:
            self.setup()

        cmd = "sudo bash networkcapacity.sh"

        LOG.debug("Executing command: %s", cmd)
        status, stdout, stderr = self.client.execute(cmd)
        if status:
            raise RuntimeError(stderr)

        result.update(jsonutils.loads(stdout))