#!/bin/bash

# Check for running backups:
ls -d /opt/backupmounts/* > /dev/null 2>&1

if [[ "${?}" == 0 ]]; then
  echo "Backup in progress, bailing out"
  exit 0
fi

# Run docker pull if needed
[[ $(which docker) ]] && for image in $(docker ps | awk '{print $2}' | grep : | sort -u); do docker pull ${image}; done

# Get sunet specific units
enabled_units_of_interest="$(systemctl list-unit-files | egrep 'sunet|frontend' | grep -v disabled | awk '{print $1}')"

# Group them so we can handle them in order
frontend_units=$(echo "${enabled_units_of_interest}" | grep "frontend")
mariadb_units=$(echo "${enabled_units_of_interest}" | grep "mariadb")
nextcloud_units=$(echo "${enabled_units_of_interest}" | grep "nextcloud")
proxysql_units=$(echo "${enabled_units_of_interest}" | grep "proxysql")
redis_units=$(echo "${enabled_units_of_interest}" | grep "redis")

# Now get the rest of the units that we can do in no particular order
negative_match_pattern=$(echo -e "${frontend_units}\n${mariadb_units}\n${nextcloud_units}\n${proxysql_units}\n${redis_units}" | sed -z 's/\n/|/g;s/|$/\n/' | sed -e 's/^|//' -e 's/||\+/|/g')
misc_units=$(echo "${enabled_units_of_interest}" | egrep -v "${negative_match_pattern}")

# This is where we stop the services in the preffered order
if [[ "x" != "x${frontend_units}" ]]; then
  for unit in $(echo ${frontend_units}); do
    systemctl stop ${unit}
  done
fi
if [[ "x" != "x${nextcloud_units}" ]]; then
  for unit in $(echo ${nextcloud_units}); do
    systemctl stop ${unit}
  done
fi
if [[ "x" != "x${mariadb_units}" ]]; then
  for unit in $(echo ${mariadb_units}); do
    systemctl stop ${unit}
  done
fi
if [[ "x" != "x${proxysql_units}" ]]; then
  for unit in $(echo ${proxysql_units}); do
    systemctl stop ${unit}
  done
fi
if [[ "x" != "x${redis_units}" ]]; then
  for unit in $(echo ${redis_units}); do
    systemctl stop ${unit}
  done
fi
if [[ "x" != "x${misc_units}" ]]; then
  for unit in $(echo ${misc_units}); do
    systemctl stop ${unit}
  done
fi

# Install updates
[[ $(which docker) ]] && apt-mark unhold containerd.io
apt update
apt upgrade -y
[[ $(which docker) ]] && apt-mark hold containerd.io

# Remove lockfiles
rm  /tmp/mkbucket-*.lock &>/dev/null 
rm  /tmp/cron-*.lock &>/dev/null 
# Now do the real reboot
/lib/molly-guard/reboot