#
# Copyright 2014 Microsoft Corporation
#
# 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.
#
# Requires Python 2.4+ and Openssl 1.0+
#

import os
import re
import pwd
import shutil
import socket
import array
import struct
import fcntl
import time
import azurelinuxagent.logger as logger
import azurelinuxagent.utils.fileutil as fileutil
import azurelinuxagent.utils.shellutil as shellutil
import azurelinuxagent.utils.textutil as textutil
from azurelinuxagent.distro.default.osutil import DefaultOSUtil

class Ubuntu14OSUtil(DefaultOSUtil):
    def __init__(self):
        super(Ubuntu14OSUtil, self).__init__()

    def start_network(self):
        return shellutil.run("service networking start", chk_err=False)

    def stop_agent_service(self):
        return shellutil.run("service walinuxagent stop", chk_err=False)

    def start_agent_service(self):
        return shellutil.run("service walinuxagent start", chk_err=False)

class Ubuntu12OSUtil(Ubuntu14OSUtil):
    def __init__(self):
        super(Ubuntu12OSUtil, self).__init__()

    #Override
    def get_dhcp_pid(self):
        ret= shellutil.run_get_output("pidof dhclient3")
        return ret[1] if ret[0] == 0 else None

class UbuntuOSUtil(Ubuntu14OSUtil):
    def __init__(self):
        super(UbuntuOSUtil, self).__init__()

    def register_agent_service(self):
        return shellutil.run("systemctl unmask walinuxagent", chk_err=False)

    def unregister_agent_service(self):
        return shellutil.run("systemctl mask walinuxagent", chk_err=False)

class UbuntuSnappyOSUtil(Ubuntu14OSUtil):
    def __init__(self):
        super(UbuntuSnappyOSUtil, self).__init__()
        self.conf_file_path = '/apps/walinuxagent/current/waagent.conf'

    def remove_rules_files(self, rules_files=""):
        pass

    def restore_rules_files(self, rules_files=""):
        pass
