#!/usr/bin/env python
"""
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.

"""

import sys
from resource_management.libraries.functions import check_process_status
from resource_management.libraries.script import Script
from resource_management.libraries.functions import conf_select
from resource_management.libraries.functions import stack_select
from resource_management.libraries.functions import format
from resource_management.core.resources.system import Execute
from resource_management.libraries.functions.stack_features import check_stack_feature
from resource_management.libraries.functions import StackFeature
from storm import storm
from service import service
from service_check import ServiceCheck
from resource_management.libraries.functions.security_commons import build_expectations, \
    cached_kinit_executor, get_params_from_filesystem, validate_security_config_properties, \
    FILE_TYPE_JAAS_CONF

class PaceMaker(Script):

  def get_component_name(self):
      return "storm-client"

  def install(self, env):
      self.install_packages(env)
      self.configure(env)

  def configure(self, env):
      import params
      env.set_params(params)
      storm()

  def pre_upgrade_restart(self, env, upgrade_type=None):
      import params
      env.set_params(params)

      if params.version and check_stack_feature(StackFeature.ROLLING_UPGRADE, params.version):
        conf_select.select(params.stack_name, "storm", params.version)
        stack_select.select("storm-client", params.version)

  def start(self, env, upgrade_type=None):
      import params
      env.set_params(params)
      self.configure(env)

      service("pacemaker", action="start")

  def stop(self, env, upgrade_type=None):
      import params
      env.set_params(params)

      service("pacemaker", action="stop")

  def status(self, env):
      import status_params
      env.set_params(status_params)
      check_process_status(status_params.pid_pacemaker)

  def security_status(self, env):
      import status_params

      env.set_params(status_params)

      if status_params.security_enabled:
          # Expect the following files to be available in status_params.config_dir:
          #   storm_jaas.conf

          try:
              props_value_check = None
              props_empty_check = ['StormServer/keyTab', 'StormServer/principal']
              props_read_check = ['StormServer/keyTab']
              storm_env_expectations = build_expectations('storm_jaas', props_value_check, props_empty_check,
                                                          props_read_check)

              storm_expectations = {}
              storm_expectations.update(storm_env_expectations)

              security_params = get_params_from_filesystem(status_params.conf_dir,
                                                     {'storm_jaas.conf': FILE_TYPE_JAAS_CONF})

              result_issues = validate_security_config_properties(security_params, storm_expectations)
              if not result_issues:  # If all validations passed successfully
                  # Double check the dict before calling execute
                  if ( 'storm_jaas' not in security_params
                       or 'StormServer' not in security_params['storm_jaas']
                       or 'keyTab' not in security_params['storm_jaas']['StormServer']
                       or 'principal' not in security_params['storm_jaas']['StormServer']):
                      self.put_structured_out({"securityState": "ERROR"})
                      self.put_structured_out({"securityIssuesFound": "Keytab file or principal are not set property."})
                      return

                  cached_kinit_executor(status_params.kinit_path_local,
                                        status_params.storm_user,
                                        security_params['storm_jaas']['StormServer']['keyTab'],
                                        security_params['storm_jaas']['StormServer']['principal'],
                                        status_params.hostname,
                                        status_params.tmp_dir)
                  self.put_structured_out({"securityState": "SECURED_KERBEROS"})
              else:
                  issues = []
                  for cf in result_issues:
                      issues.append("Configuration file %s did not pass the validation. Reason: %s" % (cf, result_issues[cf]))
                      self.put_structured_out({"securityIssuesFound": ". ".join(issues)})
                      self.put_structured_out({"securityState": "UNSECURED"})
          except Exception as e:
              self.put_structured_out({"securityState": "ERROR"})
              self.put_structured_out({"securityStateErrorInfo": str(e)})
      else:
        self.put_structured_out({"securityState": "UNSECURED"})

  def get_log_folder(self):
      import params
      return params.log_dir

  def get_user(self):
      import params
      return params.storm_user

if __name__ == "__main__":
    PaceMaker().execute()