"""
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements.  See the NOTICE file
distributed with this work for additional information
regarding copyright ownership.  The ASF licenses this file
to you 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.

Ambari Agent

"""

import os
from resource_management import *
from ambari_commons import OSConst
from ambari_commons.os_family_impl import OsFamilyFuncImpl, OsFamilyImpl
from resource_management.libraries.functions import conf_select
from resource_management.libraries.functions import hdp_select

@OsFamilyFuncImpl(os_family=OsFamilyImpl.DEFAULT)
def zookeeper_service(action='start', rolling_restart=False):
  import params

  # This path may be missing after Ambari upgrade. We need to create it.
  if not rolling_restart and not os.path.exists("/usr/hdp/current/zookeeper-server") and params.current_version:
    conf_select.select(params.stack_name, "zookeeper", params.current_version)
    hdp_select.select("zookeeper-server", params.version)

  cmd = format("env ZOOCFGDIR={config_dir} ZOOCFG=zoo.cfg {zk_bin}/zkServer.sh")

  if action == 'start':
    daemon_cmd = format("source {config_dir}/zookeeper-env.sh ; {cmd} start")
    no_op_test = format("ls {zk_pid_file} >/dev/null 2>&1 && ps -p `cat {zk_pid_file}` >/dev/null 2>&1")
    Execute(daemon_cmd,
            not_if=no_op_test,
            user=params.zk_user
    )

    if params.security_enabled:
      kinit_cmd = format("{kinit_path_local} -kt {smoke_user_keytab} {smokeuser_principal};")

      Execute(kinit_cmd,
              user=params.smokeuser
      )

  elif action == 'stop':
    daemon_cmd = format("source {config_dir}/zookeeper-env.sh ; {cmd} stop")
    rm_pid = format("rm -f {zk_pid_file}")
    Execute(daemon_cmd,
            user=params.zk_user
    )
    Execute(rm_pid)

@OsFamilyFuncImpl(os_family=OSConst.WINSRV_FAMILY)
def zookeeper_service(action='start', rolling_restart=False):
  import params
  if action == 'start':
    Service(params.zookeeper_win_service_name, action="start")
  elif action == 'stop':
    Service(params.zookeeper_win_service_name, action="stop")