#!/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 os
from resource_management.libraries.functions import format
from resource_management.libraries.script.script import Script
from resource_management.libraries.functions.version import format_stack_version
from resource_management.libraries.functions import StackFeature
from resource_management.libraries.functions.stack_features import check_stack_feature
from resource_management.libraries.functions.stack_features import get_stack_feature_version
from resource_management.libraries.functions.default import default
from utils import get_bare_principal
from resource_management.libraries.functions.get_stack_version import get_stack_version
from resource_management.libraries.functions.is_empty import is_empty
import status_params
from resource_management.libraries.resources.hdfs_resource import HdfsResource
from resource_management.libraries.functions import stack_select
from resource_management.libraries.functions import conf_select
from resource_management.libraries.functions import get_kinit_path
from resource_management.libraries.functions.get_not_managed_resources import get_not_managed_resources
from resource_management.libraries.functions.setup_ranger_plugin_xml import get_audit_configs

# server configurations
config = Script.get_config()
tmp_dir = Script.get_tmp_dir()
stack_root = Script.get_stack_root()
stack_name = default("/hostLevelParams/stack_name", None)
retryAble = default("/commandParams/command_retry_enabled", False)

# Version being upgraded/downgraded to
version = default("/commandParams/version", None)

# Version that is CURRENT.
current_version = default("/hostLevelParams/current_version", None)


stack_version_unformatted = config['hostLevelParams']['stack_version']
stack_version_formatted = format_stack_version(stack_version_unformatted)
upgrade_direction = default("/commandParams/upgrade_direction", None)

# get the correct version to use for checking stack features
version_for_stack_feature_checks = get_stack_feature_version(config)

stack_supports_ranger_kerberos = check_stack_feature(StackFeature.RANGER_KERBEROS_SUPPORT, version_for_stack_feature_checks)
stack_supports_ranger_audit_db = check_stack_feature(StackFeature.RANGER_AUDIT_DB_SUPPORT, version_for_stack_feature_checks)
stack_supports_core_site_for_ranger_plugin = check_stack_feature(StackFeature.CORE_SITE_FOR_RANGER_PLUGINS_SUPPORT, version_for_stack_feature_checks)

# When downgrading the 'version' and 'current_version' are both pointing to the downgrade-target version
# downgrade_from_version provides the source-version the downgrade is happening from
downgrade_from_version = default("/commandParams/downgrade_from_version", None)

hostname = config['hostname']

# default kafka parameters
kafka_home = '/usr/lib/kafka'
kafka_bin = kafka_home+'/bin/kafka'
conf_dir = "/etc/kafka/conf"
limits_conf_dir = "/etc/security/limits.d"

# Used while upgrading the stack in a kerberized cluster and running kafka-acls.sh
zookeeper_connect = default("/configurations/kafka-broker/zookeeper.connect", None)

kafka_user_nofile_limit = config['configurations']['kafka-env']['kafka_user_nofile_limit']
kafka_user_nproc_limit = config['configurations']['kafka-env']['kafka_user_nproc_limit']

# parameters for 2.2+
if stack_version_formatted and check_stack_feature(StackFeature.ROLLING_UPGRADE, stack_version_formatted):
  kafka_home = os.path.join(stack_root,  "current", "kafka-broker")
  kafka_bin = os.path.join(kafka_home, "bin", "kafka")
  conf_dir = os.path.join(kafka_home, "config")

kafka_user = config['configurations']['kafka-env']['kafka_user']
kafka_log_dir = config['configurations']['kafka-env']['kafka_log_dir']
kafka_pid_dir = status_params.kafka_pid_dir
kafka_pid_file = kafka_pid_dir+"/kafka.pid"
# This is hardcoded on the kafka bash process lifecycle on which we have no control over
kafka_managed_pid_dir = "/var/run/kafka"
kafka_managed_log_dir = "/var/log/kafka"
user_group = config['configurations']['cluster-env']['user_group']
java64_home = config['hostLevelParams']['java_home']
kafka_env_sh_template = config['configurations']['kafka-env']['content']
kafka_jaas_conf_template = default("/configurations/kafka_jaas_conf/content", None)
kafka_client_jaas_conf_template = default("/configurations/kafka_client_jaas_conf/content", None)
kafka_hosts = config['clusterHostInfo']['kafka_broker_hosts']
kafka_hosts.sort()

zookeeper_hosts = config['clusterHostInfo']['zookeeper_hosts']
zookeeper_hosts.sort()
secure_acls = default("/configurations/kafka-broker/zookeeper.set.acl", False)
kafka_security_migrator = os.path.join(kafka_home, "bin", "zookeeper-security-migration.sh")

#Kafka log4j
kafka_log_maxfilesize = default('/configurations/kafka-log4j/kafka_log_maxfilesize',256)
kafka_log_maxbackupindex = default('/configurations/kafka-log4j/kafka_log_maxbackupindex',20)
controller_log_maxfilesize = default('/configurations/kafka-log4j/controller_log_maxfilesize',256)
controller_log_maxbackupindex = default('/configurations/kafka-log4j/controller_log_maxbackupindex',20)

if (('kafka-log4j' in config['configurations']) and ('content' in config['configurations']['kafka-log4j'])):
    log4j_props = config['configurations']['kafka-log4j']['content']
else:
    log4j_props = None

if 'ganglia_server_host' in config['clusterHostInfo'] and \
    len(config['clusterHostInfo']['ganglia_server_host'])>0:
  ganglia_installed = True
  ganglia_server = config['clusterHostInfo']['ganglia_server_host'][0]
  ganglia_report_interval = 60
else:
  ganglia_installed = False

metric_collector_port = ""
metric_collector_protocol = ""
metric_truststore_path= default("/configurations/ams-ssl-client/ssl.client.truststore.location", "")
metric_truststore_type= default("/configurations/ams-ssl-client/ssl.client.truststore.type", "")
metric_truststore_password= default("/configurations/ams-ssl-client/ssl.client.truststore.password", "")

ams_collector_hosts = ",".join(default("/clusterHostInfo/metrics_collector_hosts", []))
has_metric_collector = not len(ams_collector_hosts) == 0

if has_metric_collector:
  if 'cluster-env' in config['configurations'] and \
      'metrics_collector_vip_port' in config['configurations']['cluster-env']:
    metric_collector_port = config['configurations']['cluster-env']['metrics_collector_vip_port']
  else:
    metric_collector_web_address = default("/configurations/ams-site/timeline.metrics.service.webapp.address", "0.0.0.0:6188")
    if metric_collector_web_address.find(':') != -1:
      metric_collector_port = metric_collector_web_address.split(':')[1]
    else:
      metric_collector_port = '6188'
  if default("/configurations/ams-site/timeline.metrics.service.http.policy", "HTTP_ONLY") == "HTTPS_ONLY":
    metric_collector_protocol = 'https'
  else:
    metric_collector_protocol = 'http'
  pass

# Security-related params
security_enabled = config['configurations']['cluster-env']['security_enabled']
kafka_kerberos_enabled = (('security.inter.broker.protocol' in config['configurations']['kafka-broker']) and
                         ((config['configurations']['kafka-broker']['security.inter.broker.protocol'] == "PLAINTEXTSASL") or
                          (config['configurations']['kafka-broker']['security.inter.broker.protocol'] == "SASL_PLAINTEXT")))


if security_enabled and stack_version_formatted != "" and 'kafka_principal_name' in config['configurations']['kafka-env'] \
  and check_stack_feature(StackFeature.KAFKA_KERBEROS, stack_version_formatted):
    _hostname_lowercase = config['hostname'].lower()
    _kafka_principal_name = config['configurations']['kafka-env']['kafka_principal_name']
    kafka_jaas_principal = _kafka_principal_name.replace('_HOST',_hostname_lowercase)
    kafka_keytab_path = config['configurations']['kafka-env']['kafka_keytab']
    kafka_bare_jaas_principal = get_bare_principal(_kafka_principal_name)
    kafka_kerberos_params = "-Djava.security.auth.login.config="+ conf_dir +"/kafka_jaas.conf"
else:
    kafka_kerberos_params = ''
    kafka_jaas_principal = None
    kafka_keytab_path = None

# for curl command in ranger plugin to get db connector
jdk_location = config['hostLevelParams']['jdk_location']

# ranger kafka plugin section start

# ranger host
ranger_admin_hosts = default("/clusterHostInfo/ranger_admin_hosts", [])
has_ranger_admin = not len(ranger_admin_hosts) == 0

# ranger support xml_configuration flag, instead of depending on ranger xml_configurations_supported/ranger-env, using stack feature
xml_configurations_supported = check_stack_feature(StackFeature.RANGER_XML_CONFIGURATION, version_for_stack_feature_checks)

# ambari-server hostname
ambari_server_hostname = config['clusterHostInfo']['ambari_server_host'][0]

ranger_admin_log_dir = default("/configurations/ranger-env/ranger_admin_log_dir","/var/log/ranger/admin")

# ranger kafka plugin enabled property
enable_ranger_kafka = default("configurations/ranger-kafka-plugin-properties/ranger-kafka-plugin-enabled", "No")
enable_ranger_kafka = True if enable_ranger_kafka.lower() == 'yes' else False

# ranger kafka-plugin supported flag, instead of dependending on is_supported_kafka_ranger/kafka-env.xml, using stack feature
is_supported_kafka_ranger = check_stack_feature(StackFeature.KAFKA_RANGER_PLUGIN_SUPPORT, version_for_stack_feature_checks)

# ranger kafka properties
if enable_ranger_kafka and is_supported_kafka_ranger:
  # get ranger policy url
  policymgr_mgr_url = config['configurations']['ranger-kafka-security']['ranger.plugin.kafka.policy.rest.url']

  if not is_empty(policymgr_mgr_url) and policymgr_mgr_url.endswith('/'):
    policymgr_mgr_url = policymgr_mgr_url.rstrip('/')

  # ranger audit db user
  xa_audit_db_user = default('/configurations/admin-properties/audit_db_user', 'rangerlogger')

  xa_audit_db_password = ''
  if not is_empty(config['configurations']['admin-properties']['audit_db_password']) and stack_supports_ranger_audit_db and has_ranger_admin:
    xa_audit_db_password = config['configurations']['admin-properties']['audit_db_password']

  # ranger kafka service/repository name
  repo_name = str(config['clusterName']) + '_kafka'
  repo_name_value = config['configurations']['ranger-kafka-security']['ranger.plugin.kafka.service.name']
  if not is_empty(repo_name_value) and repo_name_value != "{{repo_name}}":
    repo_name = repo_name_value

  ranger_env = config['configurations']['ranger-env']

  # create ranger-env config having external ranger credential properties
  if not has_ranger_admin and enable_ranger_kafka:
    external_admin_username = default('/configurations/ranger-kafka-plugin-properties/external_admin_username', 'admin')
    external_admin_password = default('/configurations/ranger-kafka-plugin-properties/external_admin_password', 'admin')
    external_ranger_admin_username = default('/configurations/ranger-kafka-plugin-properties/external_ranger_admin_username', 'amb_ranger_admin')
    external_ranger_admin_password = default('/configurations/ranger-kafka-plugin-properties/external_ranger_admin_password', 'amb_ranger_admin')
    ranger_env = {}
    ranger_env['admin_username'] = external_admin_username
    ranger_env['admin_password'] = external_admin_password
    ranger_env['ranger_admin_username'] = external_ranger_admin_username
    ranger_env['ranger_admin_password'] = external_ranger_admin_password

  ranger_plugin_properties = config['configurations']['ranger-kafka-plugin-properties']
  ranger_kafka_audit = config['configurations']['ranger-kafka-audit']
  ranger_kafka_audit_attrs = config['configuration_attributes']['ranger-kafka-audit']
  ranger_kafka_security = config['configurations']['ranger-kafka-security']
  ranger_kafka_security_attrs = config['configuration_attributes']['ranger-kafka-security']
  ranger_kafka_policymgr_ssl = config['configurations']['ranger-kafka-policymgr-ssl']
  ranger_kafka_policymgr_ssl_attrs = config['configuration_attributes']['ranger-kafka-policymgr-ssl']

  policy_user = config['configurations']['ranger-kafka-plugin-properties']['policy_user']

  ranger_plugin_config = {
    'username' : config['configurations']['ranger-kafka-plugin-properties']['REPOSITORY_CONFIG_USERNAME'],
    'password' : config['configurations']['ranger-kafka-plugin-properties']['REPOSITORY_CONFIG_PASSWORD'],
    'zookeeper.connect' : config['configurations']['ranger-kafka-plugin-properties']['zookeeper.connect'],
    'commonNameForCertificate' : config['configurations']['ranger-kafka-plugin-properties']['common.name.for.certificate']
  }

  kafka_ranger_plugin_repo = {
    'isEnabled': 'true',
    'configs': ranger_plugin_config,
    'description': 'kafka repo',
    'name': repo_name,
    'repositoryType': 'kafka',
    'type': 'kafka',
    'assetType': '1'
  }

  if stack_supports_ranger_kerberos and security_enabled:
    ranger_plugin_config['policy.download.auth.users'] = kafka_user
    ranger_plugin_config['tag.download.auth.users'] = kafka_user
    ranger_plugin_config['ambari.service.check.user'] = policy_user

  downloaded_custom_connector = None
  previous_jdbc_jar_name = None
  driver_curl_source = None
  driver_curl_target = None
  previous_jdbc_jar = None

  if has_ranger_admin and stack_supports_ranger_audit_db:
    xa_audit_db_flavor = config['configurations']['admin-properties']['DB_FLAVOR']
    jdbc_jar_name, previous_jdbc_jar_name, audit_jdbc_url, jdbc_driver = get_audit_configs(config)

    downloaded_custom_connector = format("{tmp_dir}/{jdbc_jar_name}") if stack_supports_ranger_audit_db else None
    driver_curl_source = format("{jdk_location}/{jdbc_jar_name}") if stack_supports_ranger_audit_db else None
    driver_curl_target = format("{kafka_home}/libs/{jdbc_jar_name}") if stack_supports_ranger_audit_db else None
    previous_jdbc_jar = format("{kafka_home}/libs/{previous_jdbc_jar_name}") if stack_supports_ranger_audit_db else None

  xa_audit_db_is_enabled = False
  if xml_configurations_supported and stack_supports_ranger_audit_db:
    xa_audit_db_is_enabled = config['configurations']['ranger-kafka-audit']['xasecure.audit.destination.db']

  xa_audit_hdfs_is_enabled = default('/configurations/ranger-kafka-audit/xasecure.audit.destination.hdfs', False)
  ssl_keystore_password = config['configurations']['ranger-kafka-policymgr-ssl']['xasecure.policymgr.clientssl.keystore.password'] if xml_configurations_supported else None
  ssl_truststore_password = config['configurations']['ranger-kafka-policymgr-ssl']['xasecure.policymgr.clientssl.truststore.password'] if xml_configurations_supported else None
  credential_file = format('/etc/ranger/{repo_name}/cred.jceks')

  stack_version = get_stack_version('kafka-broker')
  setup_ranger_env_sh_source = format('{stack_root}/{stack_version}/ranger-kafka-plugin/install/conf.templates/enable/kafka-ranger-env.sh')
  setup_ranger_env_sh_target = format("{conf_dir}/kafka-ranger-env.sh")

  # for SQLA explicitly disable audit to DB for Ranger
  if has_ranger_admin and stack_supports_ranger_audit_db and xa_audit_db_flavor.lower() == 'sqla':
    xa_audit_db_is_enabled = False

# ranger kafka plugin section end

namenode_hosts = default("/clusterHostInfo/namenode_host", [])
has_namenode = not len(namenode_hosts) == 0

hdfs_user = config['configurations']['hadoop-env']['hdfs_user'] if has_namenode else None
hdfs_user_keytab = config['configurations']['hadoop-env']['hdfs_user_keytab'] if has_namenode else None
hdfs_principal_name = config['configurations']['hadoop-env']['hdfs_principal_name'] if has_namenode else None
hdfs_site = config['configurations']['hdfs-site'] if has_namenode else None
default_fs = config['configurations']['core-site']['fs.defaultFS'] if has_namenode else None
hadoop_bin_dir = stack_select.get_hadoop_dir("bin") if has_namenode else None
hadoop_conf_dir = conf_select.get_hadoop_conf_dir() if has_namenode else None
kinit_path_local = get_kinit_path(default('/configurations/kerberos-env/executable_search_paths', None))

import functools
#create partial functions with common arguments for every HdfsResource call
#to create/delete hdfs directory/file/copyfromlocal we need to call params.HdfsResource in code
HdfsResource = functools.partial(
  HdfsResource,
  user=hdfs_user,
  hdfs_resource_ignore_file = "/var/lib/ambari-agent/data/.hdfs_resource_ignore",
  security_enabled = security_enabled,
  keytab = hdfs_user_keytab,
  kinit_path_local = kinit_path_local,
  hadoop_bin_dir = hadoop_bin_dir,
  hadoop_conf_dir = hadoop_conf_dir,
  principal_name = hdfs_principal_name,
  hdfs_site = hdfs_site,
  default_fs = default_fs,
  immutable_paths = get_not_managed_resources()
)