#!/usr/bin/env bash

# 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.

# The name of the script being executed.
HADOOP_SHELL_EXECNAME="ozone"
MYNAME="${BASH_SOURCE-$0}"

## @description  build up the hdfs command's usage text.
## @audience     public
## @stability    stable
## @replaceable  no
function hadoop_usage
{
  hadoop_add_option "--buildpaths" "attempt to add class files from build tree"
  hadoop_add_option "--daemon (start|status|stop)" "operate on a daemon"
  hadoop_add_option "--hostnames list[,of,host,names]" "hosts to use in worker mode"
  hadoop_add_option "--loglevel level" "set the log4j level for this command"
  hadoop_add_option "--hosts filename" "list of hosts to use in worker mode"
  hadoop_add_option "--workers" "turn on worker mode"


  hadoop_add_subcommand "classpath" client "prints the class path needed to get the hadoop jar and the required libraries"
  hadoop_add_subcommand "datanode" daemon "run a HDDS datanode"
  hadoop_add_subcommand "envvars" client "display computed Hadoop environment variables"
  hadoop_add_subcommand "freon" client "runs an ozone data generator"
  hadoop_add_subcommand "genesis" client "runs a collection of ozone benchmarks to help with tuning."
  hadoop_add_subcommand "getozoneconf" client "get ozone config values from configuration"
  hadoop_add_subcommand "jmxget" admin "get JMX exported values from NameNode or DataNode."
  hadoop_add_subcommand "om" daemon "Ozone Manager"
  hadoop_add_subcommand "o3" client "command line interface for ozone"
  hadoop_add_subcommand "noz" client "ozone debug tool, convert ozone metadata into relational data"
  hadoop_add_subcommand "scm" daemon "run the Storage Container Manager service"
  hadoop_add_subcommand "scmcli" client "run the CLI of the Storage Container Manager"
  hadoop_add_subcommand "version" client "print the version"
  hadoop_add_subcommand "genconf" client "generate minimally required ozone configs and output to ozone-site.xml in specified path"

  hadoop_generate_usage "${HADOOP_SHELL_EXECNAME}" false
}

## @description  Default command handler for hadoop command
## @audience     public
## @stability    stable
## @replaceable  no
## @param        CLI arguments
function ozonecmd_case
{
  subcmd=$1
  shift

  case ${subcmd} in
    classpath)
      hadoop_do_classpath_subcommand HADOOP_CLASSNAME "$@"
    ;;
    datanode)
      HADOOP_SUBCMD_SUPPORTDAEMONIZATION="true"
      HADOOP_CLASSNAME=org.apache.hadoop.ozone.HddsDatanodeService
    ;;
    envvars)
      echo "JAVA_HOME='${JAVA_HOME}'"
      echo "HADOOP_HDFS_HOME='${HADOOP_HDFS_HOME}'"
      echo "HDFS_DIR='${HDFS_DIR}'"
      echo "HDFS_LIB_JARS_DIR='${HDFS_LIB_JARS_DIR}'"
      echo "HADOOP_CONF_DIR='${HADOOP_CONF_DIR}'"
      echo "HADOOP_TOOLS_HOME='${HADOOP_TOOLS_HOME}'"
      echo "HADOOP_TOOLS_DIR='${HADOOP_TOOLS_DIR}'"
      echo "HADOOP_TOOLS_LIB_JARS_DIR='${HADOOP_TOOLS_LIB_JARS_DIR}'"
      if [[ -n "${QATESTMODE}" ]]; then
        echo "MYNAME=${MYNAME}"
        echo "HADOOP_SHELL_EXECNAME=${HADOOP_SHELL_EXECNAME}"
      fi
      exit 0
    ;;
    freon)
      HADOOP_CLASSNAME=org.apache.hadoop.ozone.freon.Freon
    ;;
    genesis)
      HADOOP_CLASSNAME=org.apache.hadoop.ozone.genesis.Genesis
    ;;
    getozoneconf)
      HADOOP_CLASSNAME=org.apache.hadoop.ozone.freon.OzoneGetConf;
    ;;
    om)
      HADOOP_SUBCMD_SUPPORTDAEMONIZATION="true"
      HADOOP_CLASSNAME=org.apache.hadoop.ozone.om.OzoneManager
    ;;
    oz)
      HADOOP_CLASSNAME=org.apache.hadoop.ozone.web.ozShell.Shell
    ;;
    noz)
      HADOOP_CLASSNAME=org.apache.hadoop.ozone.scm.cli.SQLCLI
    ;;
    scm)
      HADOOP_SUBCMD_SUPPORTDAEMONIZATION="true"
      HADOOP_CLASSNAME='org.apache.hadoop.hdds.scm.server.StorageContainerManager'
      hadoop_debug "Appending HDFS_STORAGECONTAINERMANAGER_OPTS onto HADOOP_OPTS"
      HADOOP_OPTS="${HADOOP_OPTS} ${HDFS_STORAGECONTAINERMANAGER_OPTS}"
    ;;
    scmcli)
      HADOOP_CLASSNAME=org.apache.hadoop.ozone.scm.cli.SCMCLI
    ;;
    version)
      HADOOP_CLASSNAME=org.apache.hadoop.util.VersionInfo
    ;;
    genconf)
      HADOOP_CLASSNAME=org.apache.hadoop.ozone.genconf.GenerateOzoneRequiredConfigurations
    ;;
    *)
      HADOOP_CLASSNAME="${subcmd}"
      if ! hadoop_validate_classname "${HADOOP_CLASSNAME}"; then
        hadoop_exit_with_usage 1
      fi
    ;;
  esac
}

# let's locate libexec...
if [[ -n "${HADOOP_HOME}" ]]; then
  HADOOP_DEFAULT_LIBEXEC_DIR="${HADOOP_HOME}/libexec"
else
  bin=$(cd -P -- "$(dirname -- "${MYNAME}")" >/dev/null && pwd -P)
  HADOOP_DEFAULT_LIBEXEC_DIR="${bin}/../libexec"
fi

HADOOP_LIBEXEC_DIR="${HADOOP_LIBEXEC_DIR:-$HADOOP_DEFAULT_LIBEXEC_DIR}"
# shellcheck disable=SC2034
HADOOP_NEW_CONFIG=true
if [[ -f "${HADOOP_LIBEXEC_DIR}/hdfs-config.sh" ]]; then
  # shellcheck source=./hadoop-hdfs-project/hadoop-hdfs/src/main/bin/hdfs-config.sh
  . "${HADOOP_LIBEXEC_DIR}/hdfs-config.sh"
else
  echo "ERROR: Cannot execute ${HADOOP_LIBEXEC_DIR}/hdfs-config.sh." 2>&1
  exit 1
fi

# now that we have support code, let's abs MYNAME so we can use it later
MYNAME=$(hadoop_abs "${MYNAME}")

if [[ $# = 0 ]]; then
  hadoop_exit_with_usage 1
fi

HADOOP_SUBCMD=$1
shift

if hadoop_need_reexec ozone "${HADOOP_SUBCMD}"; then
  hadoop_uservar_su ozone "${HADOOP_SUBCMD}" \
    "${MYNAME}" \
    "--reexec" \
    "${HADOOP_USER_PARAMS[@]}"
  exit $?
fi

hadoop_verify_user_perm "${HADOOP_SHELL_EXECNAME}" "${HADOOP_SUBCMD}"

HADOOP_SUBCMD_ARGS=("$@")

if declare -f ozone_subcommand_"${HADOOP_SUBCMD}" >/dev/null 2>&1; then
  hadoop_debug "Calling dynamically: ozone_subcommand_${HADOOP_SUBCMD} ${HADOOP_SUBCMD_ARGS[*]}"
  "ozone_subcommand_${HADOOP_SUBCMD}" "${HADOOP_SUBCMD_ARGS[@]}"
else
  ozonecmd_case "${HADOOP_SUBCMD}" "${HADOOP_SUBCMD_ARGS[@]}"
fi

hadoop_add_client_opts

if [[ ${HADOOP_WORKER_MODE} = true ]]; then
  hadoop_common_worker_mode_execute "${HADOOP_HDFS_HOME}/bin/ozone" "${HADOOP_USER_PARAMS[@]}"
  exit $?
fi

hadoop_subcommand_opts "${HADOOP_SHELL_EXECNAME}" "${HADOOP_SUBCMD}"

# everything is in globals at this point, so call the generic handler
hadoop_generic_java_subcmd_handler