#!/bin/bash

### BEGIN INIT INFO ###
# Provides: logstash
# Required-Start: $local_fs $remote_fs $network
# Required-Stop:  $local_fs $remote_fs $network
# Default-Start:  2 3 4 5
# Default-Stop:   0 1 6
# Short-Description: start and stop logstash service
### END INIT INFO

# set -e

NAME="logstash"
DESC="logstash"
PID_FILE="/opt/logstash/shared/logstash.pid"
DAEMON="/opt/logstash/shared/run_node.sh"
OPTIONS="/opt/logstash/current/bin/pastash"
START_STOP_DAEMON=/sbin/start-stop-daemon

test -f /opt/logstash/current/bin/pastash || exit 0

test -x $DAEMON || exit 0

test -d /opt/logstash/current/node_modules || exit 0

# unset NVM_DIR



# umask 022

# Source function library.
# RH
. /etc/rc.d/init.d/functions
# Deb
# . /lib/lsb/init-functions

status_logstash() {
  # status_of_proc -p "$PID_FILE" "logstash" "$NAME"
  status -p "$PID_FILE" "logstash" "$NAME"
	RETVAL=$?
}

kill_logstash() {
  SIGNAL=$1

  if [ ! "$PID_FILE" = "" ]; then
    if [ -f $PID_FILE ]; then
      kill $SIGNAL `cat $PID_FILE` || true
      rm -f $PID_FILE
    fi
  fi
}

run_logstash() {
 echo "Running $NAME :"
  su logstash -c "cd /opt/logstash/current && $DAEMON $OPTIONS "
}

start_logstash() {
  # $START_STOP_DAEMON  -m -b -c logstash -d /opt/logstash/current --oknodo --start --pidfile $PID_FILE --exec /bin/sh -- -c "exec $DAEMON $OPTIONS "

  # the RedHat port of start-stop-daemon is slightly different
  $START_STOP_DAEMON  -m -b -c logstash  --oknodo --pidfile $PID_FILE --start --exec /bin/sh -- -c "exec $DAEMON $OPTIONS "
  sleep 1
  status_logstash
  chown logstash $PID_FILE
}

case "$1" in
  run)
    run_logstash
    ;;
  start)
    echo -n "Starting $DESC: "
    start_logstash
    echo "$NAME."
    ;;
  stop)
    echo -n "Stopping $DESC: "
    kill_logstash
    echo "$NAME."
    ;;
  restart)
    echo -n "Restarting $DESC: "
    kill_logstash || true
    sleep 1
    start_logstash
    echo "$NAME."
    ;;
  status)
    status_logstash
    ;;
  *)
    echo "Usage: /etc/init.d/logstash {start|stop|restart|status|run}"
    exit 1
esac

exit 0