#!/usr/bin/env python
# -*- coding: utf-8 -*-

__author__ = 'Jorge Niedbalski R. <jorge.niedbalski@canonical.com>'

import yaml

from subprocess import check_call

from charmhelpers.core.hookenv import (
    log,
    DEBUG,
)


def create(sysctl_dict, sysctl_file):
    """Creates a sysctl.conf file from a YAML associative array

    :param sysctl_dict: a dict of sysctl options eg { 'kernel.max_pid': 1337 }
    :type sysctl_dict: dict
    :param sysctl_file: path to the sysctl file to be saved
    :type sysctl_file: str or unicode
    :returns: None
    """
    sysctl_dict = yaml.load(sysctl_dict)

    with open(sysctl_file, "w") as fd:
        for key, value in sysctl_dict.items():
            fd.write("{}={}\n".format(key, value))

    log("Updating sysctl_file: %s values: %s" % (sysctl_file, sysctl_dict),
        level=DEBUG)

    check_call(["sysctl", "-p", sysctl_file])