#!/bin/sh

use_systemctl="True"
systemd_version=0
if ! command -V systemctl >/dev/null 2>&1; then
  use_systemctl="False"
else
  systemd_version=$(systemctl --version | head -1 | cut -d ' ' -f 2)
fi

service_name=rebound

cleanup() {
  if [ "${use_systemctl}" = "False" ]; then
    rm -f /usr/lib/systemd/system/${service_name}.service
  else
    rm -f /etc/chkconfig/${service_name}
    rm -f /etc/init.d/${service_name}
  fi
}

cleanInstall() {
  printf "\033[32m Post Install of an clean install\033[0m\n"
  if [ "${use_systemctl}" = "False" ]; then
    if command -V chkconfig >/dev/null 2>&1; then
      chkconfig --add ${service_name}
    fi

    service ${service_name} restart || :
  else
    if [[ "${systemd_version}" -lt 231 ]]; then
      printf "\033[31m systemd version %s is less then 231, fixing the service file \033[0m\n" "${systemd_version}"
      sed -i "s/=+/=/g" /usr/lib/systemd/system/${service_name}.service
    fi
    printf "\033[32m Reload the service unit from disk\033[0m\n"
    systemctl daemon-reload || :
    printf "\033[32m Unmask the service\033[0m\n"
    systemctl unmask ${service_name} || :
    printf "\033[32m Set the preset flag for the service unit\033[0m\n"
    systemctl preset ${service_name} || :
    printf "\033[32m Set the enabled flag for the service unit\033[0m\n"
    systemctl enable ${service_name} || :
    systemctl restart ${service_name} || :
  fi
}

upgrade() {
  printf "\033[32m Post Install of an upgrade\033[0m\n"
  systemctl daemon-reload || :
  systemctl restart ${service_name} || :
}

# Step 2, check if this is a clean install or an upgrade
action="$1"
if [ "$1" = "configure" ] && [ -z "$2" ]; then
  action="install"
elif [ "$1" = "configure" ] && [ -n "$2" ]; then
  action="upgrade"
fi

case "$action" in
"1" | "install")
  cleanInstall
  ;;
"2" | "upgrade")
  printf "\033[32m Post Install of an upgrade\033[0m\n"
  upgrade
  ;;
*)
  printf "\033[32m Alpine\033[0m"
  cleanInstall
  ;;
esac

cleanup