#!/sbin/openrc-run
# /etc/init.d/minecraft
#
# Minecraft - OpenRC scripts
# Copyright (C) 2024 Santic Zombie [email@santic-zombie.ru]
#
#

extra_commands="reload backup listen"

INSTANCE=${RC_SVCNAME##*.}
PIDFILE="/var/run/${RC_SVCNAME}.pid"
BIN="$(ls ${BASE} -v 2>/dev/null | grep -i "craftbukkit.*jar\\|spigot.*jar\\|paper*.*jar\\|minecraft_server.*jar" | head -n 1)"
INVOCATION="/usr/bin/java -server -Xms${MINHEAP:-128M} -Xmx${MAXHEAP:-1024M} \
${CUSTOMARGS} -jar ${BIN} nogui"

depend() {
	need net localmount
	after bootmisc
	use logger
}

ME=`whoami`
as_user() {
  if [ "${ME}" = "${USER}" ] ; then
    ash -c "$1"
  else
    su - "${USER}" -c "$1"
  fi
}

start_pre () {
  if [ -z "${BIN}" ]; then
      eerror "${RC_SVCNAME} cannot find a proper server jar."
      eerror "Check your game installation at ${BASE}."
      return 1
  fi

  [ -f "${PIDFILE}" ] && rm ${PIDFILE}

  return 0
}

start () {
  ebegin "Starting Minecraft server daemon"
  if pgrep -u "${USER}" -f "${BIN}" > /dev/null ; then
    einfo "Minecraft server is already running!"
  else
    ebegin "Starting in progress"
    cd "${BASE}"
    as_user "cd ${BASE} && screen -dmS ${SCREENNAME} ${INVOCATION}"
    sleep 10
    pgrep -f "${BIN}" | tail -1 > "${PIDFILE}"
    if pgrep -u "${USER}" -f "${BIN}" | tail -1 > /dev/null ; then
      einfo "${INSTANCE} is now running."
    else
      eerror "Error! Could not start ${INSTANCE}! :("
      return 2
    fi
  fi
}

stop() {
  ebegin "Stopping Minecraft server daemon"
  if  pgrep -u "${USER}" -f "${BIN}" > /dev/null ; then
    ebegin "Stopping in progress"
    as_user "screen -p 0 -S ${SCREENNAME} -X eval 'stuff \"say SERVER SHUTTING DOWN IN 30 SECONDS. Saving map...\"\015'"
    as_user "screen -p 0 -S ${SCREENNAME} -X eval 'stuff \"save-all\"\015'"
    sleep 10
    as_user "screen -p 0 -S ${SCREENNAME} -X eval 'stuff \"stop\"\015'"
    sleep 10
  else
    einfo "${INSTANCE} was not running."
  fi
  if pgrep -u "${USER}" -f "${BIN}" > /dev/null ; then
    eerror "Error! ${INSTANCE} could not be stopped."
  else
    einfo "${INSTANCE} is stopped."
  fi

  # Hard stop the server
  start-stop-daemon --stop --chdir ${BASE} --pidfile ${PIDFILE} --user ${USER} --group ${GROUP} --retry 5 2>/dev/null
  eend 0
}

restart() {
	ebegin "Reload Minecraft server daemon"
	stop
	start
	eend $?
}

reload() {
  ebegin "Reload Minecraft server"
  if  pgrep -u "${USER}" -f "${BIN}" > /dev/null ; then
    ebegin "Reloading in progress"
    as_user "screen -p 0 -S ${SCREENNAME} -X eval 'stuff \"say SERVER RELOADING IN 40 SECONDS. Saving map...\"\015'"
    as_user "screen -p 0 -S ${SCREENNAME} -X eval 'stuff \"save-all\"\015'"
    sleep 10
    as_user "screen -p 0 -S ${SCREENNAME} -X eval 'stuff \"reload\"\015'"
		as_user "screen -p 0 -S ${SCREENNAME} -X eval 'stuff \"reload confirm\"\015'"
    sleep 10
  else
    einfo "${INSTANCE} was not running."
  fi
  if pgrep -u "${USER}" -f "${BIN}" > /dev/null ; then
    einfo "Server reloaded."
    as_user "screen -p 0 -S ${SCREENNAME} -X eval 'stuff \"say SERVER SUCCESSFULLY RELOADED!\"\015'"
  else
    eerror "Error! ${INSTANCE} could not reloaded! :("
  fi
}

saveoff() {
  if pgrep -u "${USER}" -f "${BIN}" > /dev/null ; then
    einfo "Server is running... suspending saves"
    as_user "screen -p 0 -S ${SCREENNAME} -X eval 'stuff \"say SERVER BACKUP STARTING. Server going readonly...\"\015'"
    as_user "screen -p 0 -S ${SCREENNAME} -X eval 'stuff \"save-off\"\015'"
    as_user "screen -p 0 -S ${SCREENNAME} -X eval 'stuff \"save-all\"\015'"
    sync
    sleep 10
  else
    einfo "${INSTANCE} is not running."
  fi
}

saveon() {
  if pgrep -u "${USER}" -f "${BIN}" > /dev/null ; then
    einfo "Server is running... re-enabling saves"
    as_user "screen -p 0 -S ${SCREENNAME} -X eval 'stuff \"save-on\"\015'"
    as_user "screen -p 0 -S ${SCREENNAME} -X eval 'stuff \"say SERVER BACKUP ENDED. Server going read-write...\"\015'"
  else
    echo "${INSTANCE} is not running. Not resuming saves."
  fi
}

backup() {
  saveoff

  NOW=`date "+%Y-%m-%d_%Hh%M"`
  BACKUP_FILE="${BACKUP_BASE}/backup_${NOW}.tar"
  einfo "Backing up minecraft server..."
  as_user "tar -C \"${BASE}\" -cf \"$BACKUP_FILE\" ."

  saveon

  einfo "Compressing backup..."
  as_user "gzip -f \"$BACKUP_FILE\""
  einfo "Done."
}

listen() {
  if pgrep -u "${USER}" -f "${BIN}" > /dev/null ; then
    as_user "tail -f ${BASE}/logs/latest.log"
  else
    echo "${INSTANCE} is not running. Cannot listen to server."
  fi
}