#!/bin/bash
set -euo pipefail

#########################################Oleg servers#########################################

##### exemple of start script: ./DAYS_server_Notification_shutdown_delete.sh 9 10 14 15 ######

#########################################Zabbix-server########################################

#days_shutdown_notification=$1-1
days_shutdown_notification=$1(($days_shutdown_notification-1))
days_shutdown=$1
days_notification_deleting=$1+4
days_delete=$1+5

#Date in seconds from hetzner main host server
host_seconds=$(date +"%s")
echo This is an automatic message.
echo -------------------------------------------------------------------------------------------
echo The number of seconds since the epoch $host_seconds in seconds. Date from main hetzner host.
echo -------------------------------------------------------------------------------------------

#Date from virtual server hetzner in fomat  Mon Mar 28 07:19:50 UTC 2022
vs_date=$(hcloud server describe Zabbix-server | sed -n 's/^Created:\([^(]*\).*$/\1/p')
echo Date created of Zabbix-server is $vs_date
echo -------------------------------------------------------------------------------------------

#Date from virtual server hetzner in Seconds
vs_server_seconds=$(date -s "${vs_date}" +%s)
echo Zabbix-server uptime is $vs_server_seconds in seconds
echo -------------------------------------------------------------------------------------------

#Comparing dates in seconds between the host server and the virtual server
day_diff=$((($host_seconds - $vs_server_seconds)/86400)) # Number of seconds in a day = 86,400.
echo Zabbix-server uptime is - $day_diff - days. If server do not using ${days_shutdown} days, then server Zabbix-server will be shutdown, if ${days_delete} days, server will be deleted.
echo -------------------------------------------------------------------------------------------

#Notification of shutdown
if [ $day_diff -eq ${days_shutdown_notification} ]
then
  mutt -s "Server shutdown notification" user@mail.com  <<< "Your server Zabbix-server will be switched off after 1 (one) day"
fi

#Server shutdown
if [ $day_diff -eq ${days_shutdown} ]
then
  mutt -s "Server shutdown" user@mail.com <<< "Your server Zabbix-server has been shut down."
  hcloud server poweroff Zabbix-server
fi

#Notification of deleting
if [ $day_diff -eq ${days_notification_deleting} ]
then
  mutt -s "Server deleting  notification" user@mail.com  <<< "Your server Zabbix-server will be deleted after 1 (one) day"
fi

#Server deleting
if [ $day_diff -eq ${days_delete} ]
then
  mutt -s "Server delete" user@mail.com <<< "Your server Zabbix-server has been deleted."
  hcloud server delete Zabbix-server

fi