#!/bin/sh

# number of backpus per level
n=7
backupDir=${1:-~/.backup}

if [ ! -d "$backupDir" ]; then
	echo "Backup target '$backupDir' don't exists!" >&2
	exit 1
fi

cd $backupDir

pos=$(($(cat .pos 2>/dev/null || echo -1)+1))

next_level()
(
	pos=$1
	level=$2
	if [ $(($pos%$n)) -eq 0 -a -e $(($level-1))-0 ]; then
		pos=$((($pos-$n)/$n))
		next_level $pos $(($level+1))
		dir=$level-$(($pos%$n))
		chmod -R u+w $dir/download/*/devel 2>/dev/null
		rm -rf $dir
		mv $(($level-1))-0 $dir
	fi
)
next_level $pos 1

ssh backup@minidvblinux.de '
	cd backup
	mkdir -p db
	for db in bug cms data forum; do
		mysqldump -u $db -p$db mld_$db > db/$db.sql
	done
'
rsync -acLz --skip-compress=bz2/gz/iso/jpg/opk/png/sfs/tgz --delete -e ssh backup@minidvblinux.de:backup/ 0-$(($pos%$n)) --link-dest=../0-$((($pos-1)%$n)) 2>&1 | grep -v adding
echo $pos > 0-$(($pos%$n))/.pos
touch 0-$(($pos%$n))

echo $pos > .pos.tmp && (rm .pos; mv .pos.tmp .pos)