#!/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.

"""
from resource_management.core.exceptions import Fail
from resource_management.libraries.functions.check_process_status import check_process_status
from resource_management.libraries.functions import stack_select
from resource_management.libraries.functions import conf_select
from resource_management.libraries.functions.constants import Direction
from resource_management.libraries.script import Script
from resource_management.core.resources.system import Execute, File
from resource_management.core.exceptions import ComponentIsNotRunning
from resource_management.libraries.functions.format import format
from resource_management.core.logger import Logger
from resource_management.core import shell
from ranger_service import ranger_service
from setup_ranger_xml import setup_ranger_audit_solr, setup_ranger_admin_passwd_change, update_password_configs
from resource_management.libraries.functions import solr_cloud_util
from ambari_commons.constants import UPGRADE_TYPE_NON_ROLLING, UPGRADE_TYPE_ROLLING
from resource_management.libraries.functions.constants import Direction
import upgrade
import os, errno

class RangerAdmin(Script):

  def get_component_name(self):
    return "ranger-admin"

  def install(self, env):
    self.install_packages(env)
    import params
    env.set_params(params)

    # taking backup of install.properties file
    Execute(('cp', '-f', format('{ranger_home}/install.properties'), format('{ranger_home}/install-backup.properties')),
      not_if = format('ls {ranger_home}/install-backup.properties'),
      only_if = format('ls {ranger_home}/install.properties'),
      sudo = True
    )

    # call config and setup db only in case of HDP version < 2.6
    if not params.stack_supports_ranger_setup_db_on_start:
      self.configure(env, setup_db=True)

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

    if upgrade_type == UPGRADE_TYPE_NON_ROLLING and params.upgrade_direction == Direction.UPGRADE:
      if params.stack_supports_rolling_upgrade and not params.stack_supports_config_versioning and os.path.isfile(format('{ranger_home}/ews/stop-ranger-admin.sh')):
        File(format('{ranger_home}/ews/stop-ranger-admin.sh'),
          owner=params.unix_user,
          group = params.unix_group
        )

    Execute(format('{params.ranger_stop}'), environment={'JAVA_HOME': params.java_home}, user=params.unix_user)
    if params.stack_supports_pid:
      File(params.ranger_admin_pid_file,
        action = "delete"
      )
    if not params.is_solrCloud_enabled:
      # Stop another solr instance for ranger audits
      Execute(('bash', '/usr/lib/solr/ranger_audit_server/scripts/stop_solr.sh'), environment={'JAVA_HOME': params.java_home}, user='solr')

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

    upgrade.prestart(env, "ranger-admin")

    self.set_ru_rangeradmin_in_progress(params.upgrade_marker_file)

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

    if os.path.isfile(params.upgrade_marker_file):
      os.remove(params.upgrade_marker_file)

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

    # setup db only if in case HDP version is > 2.6
    self.configure(env, upgrade_type=upgrade_type, setup_db=params.stack_supports_ranger_setup_db_on_start)
    if params.audit_solr_enabled and params.is_solrCloud_enabled:
      solr_cloud_util.setup_solr_client(params.config, custom_log4j = params.custom_log4j)
      setup_ranger_audit_solr()

    # Install another solr instance for ranger audits in old style, without InfraSolr
    if not params.is_solrCloud_enabled:
      service_packagedir = os.path.realpath(__file__).split('/scripts')[0]
      Execute('find '+service_packagedir+' -iname "*.sh" | xargs chmod +x')
      Execute('cd '+format('{service_packagedir}/scripts/solr_for_audit_setup ')+'&& '+'bash '+'./setup.sh', environment={'JAVA_HOME': params.java_home})
    #start another solr instance for ranger audits
      Execute(format('/usr/lib/solr/ranger_audit_server/scripts/start_solr.sh'), environment={'JAVA_HOME': params.java_home}, user='solr')

    update_password_configs()
    ranger_service('ranger_admin')


  def status(self, env):
    import status_params

    env.set_params(status_params)

    if status_params.stack_supports_pid:
      check_process_status(status_params.ranger_admin_pid_file)
      return

    cmd = 'ps -ef | grep proc_rangeradmin | grep -v grep'
    code, output = shell.call(cmd, timeout=20)

    if code != 0:
      if self.is_ru_rangeradmin_in_progress(status_params.upgrade_marker_file):
        Logger.info('Ranger admin process not running - skipping as stack upgrade is in progress')
      else:
        Logger.debug('Ranger admin process not running')
        raise ComponentIsNotRunning()
    pass

  def configure(self, env, upgrade_type=None, setup_db=False):
    import params
    env.set_params(params)
    if params.xml_configurations_supported:
      from setup_ranger_xml import ranger
    else:
      from setup_ranger import ranger

    # set up db if we are not upgrading and setup_db is true
    if setup_db and upgrade_type is None:
      if params.xml_configurations_supported:
        from setup_ranger_xml import setup_ranger_db
        setup_ranger_db()

    ranger('ranger_admin', upgrade_type=upgrade_type)

    # set up java patches if we are not upgrading and setup_db is true
    if setup_db and upgrade_type is None:
      if params.xml_configurations_supported:
        from setup_ranger_xml import setup_java_patch
        setup_java_patch()

      if params.stack_supports_ranger_admin_password_change:
        setup_ranger_admin_passwd_change()

  def set_ru_rangeradmin_in_progress(self, upgrade_marker_file):
    config_dir = os.path.dirname(upgrade_marker_file)
    try:
      msg = "Starting Upgrade"
      if (not os.path.exists(config_dir)):
        os.makedirs(config_dir)
      ofp = open(upgrade_marker_file, 'w')
      ofp.write(msg)
      ofp.close()
    except OSError as exc:
      if exc.errno == errno.EEXIST and os.path.isdir(config_dir):
        pass
      else:
        raise

  def is_ru_rangeradmin_in_progress(self, upgrade_marker_file):
    return os.path.isfile(upgrade_marker_file)

  def setup_ranger_database(self, env):
    import params
    env.set_params(params)

#    upgrade_stack = stack_select._get_upgrade_stack()
#    if upgrade_stack is None:
#      raise Fail('Unable to determine the stack and stack version')

    stack_version = None

    if params.xml_configurations_supported and params.upgrade_direction == Direction.UPGRADE:
      Logger.info(format('Setting Ranger database schema'))

      from setup_ranger_xml import setup_ranger_db
      setup_ranger_db(stack_version=stack_version)

  def setup_ranger_java_patches(self, env):
    import params
    env.set_params(params)

#    upgrade_stack = stack_select._get_upgrade_stack()
#    if upgrade_stack is None:
#      raise Fail('Unable to determine the stack and stack version')

    stack_version = None

    if params.xml_configurations_supported and params.upgrade_direction == Direction.UPGRADE:
      Logger.info(format('Applying Ranger java patches'))

      from setup_ranger_xml import setup_java_patch
      setup_java_patch(stack_version=stack_version)

  def set_pre_start(self, env):
    import params
    env.set_params(params)

#    upgrade_stack = stack_select._get_upgrade_stack()
#    if upgrade_stack is None:
#      raise Fail('Unable to determine the stack and stack version')

#    stack_name = upgrade_stack[0]
#    stack_version = upgrade_stack[1]

#    stack_select.select("ranger-admin", stack_version)
#    conf_select.select(stack_name, "ranger-admin", stack_version)

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

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

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