#!/usr/bin/env bash 

set -eu

FORCE=0

synopsis() {
	cat << EOF
Usage : `basename $0` [-h] [-f] system 
EOF
}

help() {
	cat << EOF

`basename $0` supprime les modifications d'un système.

`synopsis`

-h	: affiche cette aide
-f  : pas de demande de confirmation

Remarque  : Les fichiers seront regénérés (vides) au prochain 
			demarrage de la machine. 

EOF
}

usage() {
	synopsis
	exit 1
}

args() {
	local opt
	while getopts "hf" opt; do
		case $opt in
			h) help; exit 0;;
			f) FORCE=1;;
			?) usage;;
		esac
	done
	shift $(($OPTIND - 1))

	GUEST_NAMES="$@"
	[ -z "$GUEST_NAMES" ] && usage || :
	
}

# Programme principal

VDN_PATH=$(readlink -f $(dirname $0)/..); . $VDN_PATH/bin/functions.sh

args "$@"

SAVE_FILES=""

for i in $GUEST_NAMES; do
	loadGuestVars $i
	
	[ -n "$SAVE_FILE" ] && {
		[ -e $SAVE_FILE ] && \
			SAVE_FILES="$SAVE_FILES $SAVE_FILE" || :
	} || :
	
	[ -n "$HDB" ] && {
		set +u
		[ -z "$SAVE_DIR_HDB" ] && SAVE_DIR_HDB=$SAVE_DIR
		set -u
		
		[ -e $SAVE_DIR_HDB/$HDB ] && \
			SAVE_FILES="$SAVE_FILES $SAVE_DIR_HDB/$HDB" || :
	} || :
done

if [ -n "$SAVE_FILES" ]; then
	
	if [ $FORCE = 0 ]; then
	    echo -e "Supprimer ? :"
		for i in $SAVE_FILES; do
			du -h $i
		done
		msg="Supprimer tous les fichiers ?"
		request "$msg"
		[ $? != 0 ] && exit || :
	fi
	
	echo
	rm -f $SAVE_FILES
	echo "rm -f $SAVE_FILES"
	
else
	echo "No files to clean !" >&2
	sleep 1
fi