#!/bin/bash

# developed by k2patel
# k2patel@hotmail.com

############# Read ME ###############
# this Script will do the Backup and remove old copy.
# This script work based on existing DB Entry.
# When you initialize it only create one copy rest of the dummy entry need to be entered by you.
#####################################


BASE="$( cd "$( dirname "$0" )" && pwd )"
cd $BASE

source config_bash

DATE=$(date +%Y%m%d)
perl=$(which perl)


for inst in instance{1..10}
do
	eval var1=\$$inst
	arry=($var1)
if [[ $1 == "init" ]]; then
	if [ "$var1" != "" ]
		then
			vol=${arry[0]}
			echo "Running backup for $vol stored in "
			newsnp=`$perl create_snap.pl $vol $DATE`
			$perl db.pl add $vol $newsnp $DATE
			echo "waiting."
			$perl snap_status.pl $newsnp
			echo "done"
	fi
else
	if [ "$var1" != "" ]
		then
		freq=${arry[1]}
		vol=${arry[0]}
		iter=${arry[2]}
		lookup=$(echo "$iter * $freq" | bc)
		isit=`date -d "now -$lookup days" +%Y%m%d`
		isit_nxt=`date -d "now -$freq days" +%Y%m%d`
		lstnc=(`$perl $BASE/db.pl get "$vol" "$isit"`)
		if [ "$isit" == "${lstnc[1]}" ];then
				echo "Running backup for $vol stored in "
				newsnp=`$perl create_snap.pl $vol $DATE`
				$perl db.pl add $vol $newsnp $DATE
				echo "waiting."
				$perl snap_status.pl $newsnp
				echo "done"
				lstnx=(`$perl $BASE/db.pl get "$vol" "$isit_nxt"`)
			if [ "${lstnx[0]}" == '' ]; then
				echo "Notify Admin"
			else
				if [ "${lstnc[0]}" != '' ]; then
					$perl delete_snap.pl ${lstnc[0]}
				fi
			fi
		else
			echo "backup is not needed"
		fi
	fi
fi
done