#!/bin/bash
#
# Script to stop the service and uninstall TDengine, but retain the config, data and log files.

set -e
#set -x

verMode=edge

RED='\033[0;31m'
GREEN='\033[1;32m'
NC='\033[0m'

installDir="/usr/local/taos"
serverName="taosd"
clientName="taos"
uninstallScript="rmtaos"
productName="TDengine"


#install main path
install_main_dir=${installDir}
data_link_dir="${installDir}/data"
log_link_dir="${installDir}/log"
cfg_link_dir="${installDir}/cfg"
bin_link_dir="/usr/bin"
lib_link_dir="/usr/lib"
lib64_link_dir="/usr/lib64"
inc_link_dir="/usr/include"
install_nginxd_dir="/usr/local/nginxd"

service_config_dir="/etc/systemd/system"
taos_service_name=${serverName}
taosadapter_service_name="taosadapter"
tarbitrator_service_name="tarbitratord"
nginx_service_name="nginxd"
csudo=""
if command -v sudo >/dev/null; then
  csudo="sudo "
fi

initd_mod=0
service_mod=2
if pidof systemd &>/dev/null; then
  service_mod=0
elif $(which service &>/dev/null); then
  service_mod=1
  service_config_dir="/etc/init.d"
  if $(which chkconfig &>/dev/null); then
    initd_mod=1
  elif $(which insserv &>/dev/null); then
    initd_mod=2
  elif $(which update-rc.d &>/dev/null); then
    initd_mod=3
  else
    service_mod=2
  fi
else
  service_mod=2
fi

function kill_taosadapter() {
  pid=$(ps -ef | grep "taosadapter" | grep -v "grep" | awk '{print $2}')
  if [ -n "$pid" ]; then
    ${csudo}kill -9 $pid || :
  fi
}

function kill_taosd() {
  pid=$(ps -ef | grep "${serverName}" | grep -v "grep" | awk '{print $2}')
  if [ -n "$pid" ]; then
    ${csudo}kill -9 $pid || :
  fi
}

function kill_tarbitrator() {
  pid=$(ps -ef | grep "tarbitrator" | grep -v "grep" | awk '{print $2}')
  if [ -n "$pid" ]; then
    ${csudo}kill -9 $pid || :
  fi
}
function clean_bin() {
  # Remove link
  ${csudo}rm -f ${bin_link_dir}/${clientName} || :
  ${csudo}rm -f ${bin_link_dir}/${serverName} || :
  ${csudo}rm -f ${bin_link_dir}/taosadapter || :
  ${csudo}rm -f ${bin_link_dir}/${uninstallScript} || :
  ${csudo}rm -f ${bin_link_dir}/tarbitrator || :
  ${csudo}rm -f ${bin_link_dir}/set_core || :
  ${csudo}rm -f ${bin_link_dir}/run_taosd_and_taosadapter.sh || :
}

function clean_lib() {
  # Remove link
  ${csudo}rm -f ${lib_link_dir}/libtaos.* || :
  ${csudo}rm -f ${lib64_link_dir}/libtaos.* || :
  #${csudo}rm -rf ${v15_java_app_dir}           || :
}

function clean_header() {
  # Remove link
  ${csudo}rm -f ${inc_link_dir}/taos.h || :
  ${csudo}rm -f ${inc_link_dir}/taosdef.h || :
  ${csudo}rm -f ${inc_link_dir}/taoserror.h || :
}

function clean_config() {
  # Remove link
  ${csudo}rm -f ${cfg_link_dir}/* || :
}

function clean_log() {
  # Remove link
  ${csudo}rm -rf ${log_link_dir} || :
}

function clean_service_on_systemd() {
  taosd_service_config="${service_config_dir}/${taos_service_name}.service"
  if systemctl is-active --quiet ${taos_service_name}; then
    echo "${productName} ${serverName} is running, stopping it..."
    ${csudo}systemctl stop ${taos_service_name} &>/dev/null || echo &>/dev/null
  fi
  ${csudo}systemctl disable ${taos_service_name} &>/dev/null || echo &>/dev/null
  ${csudo}rm -f ${taosd_service_config}

  taosadapter_service_config="${service_config_dir}/taosadapter.service"
  if systemctl is-active --quiet ${taosadapter_service_name}; then
    echo "${productName} taosAdapter is running, stopping it..."
    ${csudo}systemctl stop ${taosadapter_service_name} &>/dev/null || echo &>/dev/null
  fi
  ${csudo}systemctl disable ${taosadapter_service_name} &>/dev/null || echo &>/dev/null
  [ -f ${taosadapter_service_config} ] && ${csudo}rm -f ${taosadapter_service_config}

  tarbitratord_service_config="${service_config_dir}/${tarbitrator_service_name}.service"
  if systemctl is-active --quiet ${tarbitrator_service_name}; then
    echo "${productName} tarbitrator is running, stopping it..."
    ${csudo}systemctl stop ${tarbitrator_service_name} &>/dev/null || echo &>/dev/null
  fi
  ${csudo}systemctl disable ${tarbitrator_service_name} &>/dev/null || echo &>/dev/null
  ${csudo}rm -f ${tarbitratord_service_config}

  if [ "$verMode" == "cluster" ]; then
    nginx_service_config="${service_config_dir}/${nginx_service_name}.service"
    if [ -d ${install_nginxd_dir} ]; then
      if systemctl is-active --quiet ${nginx_service_name}; then
        echo "Nginx for ${productName} is running, stopping it..."
        ${csudo}systemctl stop ${nginx_service_name} &>/dev/null || echo &>/dev/null
      fi
      ${csudo}systemctl disable ${nginx_service_name} &>/dev/null || echo &>/dev/null
      ${csudo}rm -f ${nginx_service_config}
    fi
  fi
}

function clean_service_on_sysvinit() {
  if pidof ${serverName} &>/dev/null; then
    echo "${productName} ${serverName} is running, stopping it..."
    ${csudo}service taosd stop || :
  fi

  if pidof tarbitrator &>/dev/null; then
    echo "${productName} tarbitrator is running, stopping it..."
    ${csudo}service tarbitratord stop || :
  fi

  if ((${initd_mod} == 1)); then
    if [ -e ${service_config_dir}/${serverName} ]; then
      ${csudo}chkconfig --del ${serverName} || :
    fi
    if [ -e ${service_config_dir}/tarbitratord ]; then
      ${csudo}chkconfig --del tarbitratord || :
    fi
  elif ((${initd_mod} == 2)); then
    if [ -e ${service_config_dir}/${serverName} ]; then
      ${csudo}insserv -r ${serverName} || :
    fi
    if [ -e ${service_config_dir}/tarbitratord ]; then
      ${csudo}insserv -r tarbitratord || :
    fi
  elif ((${initd_mod} == 3)); then
    if [ -e ${service_config_dir}/${serverName} ]; then
      ${csudo}update-rc.d -f ${serverName} remove || :
    fi
    if [ -e ${service_config_dir}/tarbitratord ]; then
      ${csudo}update-rc.d -f tarbitratord remove || :
    fi
  fi

  ${csudo}rm -f ${service_config_dir}/${serverName} || :
  ${csudo}rm -f ${service_config_dir}/tarbitratord || :

  if $(which init &>/dev/null); then
    ${csudo}init q || :
  fi
}

function clean_service() {
  if ((${service_mod} == 0)); then
    clean_service_on_systemd
  elif ((${service_mod} == 1)); then
    clean_service_on_sysvinit
  else
    kill_taosadapter
    kill_taosd
    kill_tarbitrator
  fi
}

# Stop service and disable booting start.
clean_service
# Remove binary file and links
clean_bin
# Remove header file.
clean_header
# Remove lib file
clean_lib
# Remove link log directory
clean_log
# Remove link configuration file
clean_config
# Remove data link directory
${csudo}rm -rf ${data_link_dir} || :

${csudo}rm -rf ${install_main_dir}
${csudo}rm -rf ${install_nginxd_dir}
if [[ -e /etc/os-release ]]; then
  osinfo=$(awk -F= '/^NAME/{print $2}' /etc/os-release)
else
  osinfo=""
fi

if echo $osinfo | grep -qwi "ubuntu"; then
  #  echo "this is ubuntu system"
  ${csudo}dpkg --force-all -P tdengine >/dev/null 2>&1 || :
elif echo $osinfo | grep -qwi "debian"; then
  #  echo "this is debian system"
  ${csudo}dpkg --force-all -P tdengine >/dev/null 2>&1 || :
elif echo $osinfo | grep -qwi "centos"; then
  #  echo "this is centos system"
  ${csudo}rpm -e --noscripts tdengine >/dev/null 2>&1 || :
fi

echo -e "${GREEN}${productName} is removed successfully!${NC}"
echo