#!/bin/sh
[ -z "$1" ] && (echo "Error: missing argument (what to remain)" && exit)
for oldname in "$@"
do
	newname=`echo "$oldname" | tr '[:upper:]' '[:lower:]' | sed 's/\ /_/g; s/Ö/oe/g; s/Ä/ae/g; s/Ü/ue/g; s/ö/oe/g; s/ä/ae/g; s/ü/ue/g; s/ß/ss/g'`;
	if [ "$oldname" != "$newname" ]; then
		if [ -f "$newname" ]; then
			echo "skipping $newname, because it already exists"
			rm "$oldname";
		else
			echo "renaming file $oldname to $newname"
			if [ -f "$oldname" ]; then
				echo "using mv"
				mv "$oldname" "$newname";
			elif [ -d "$oldname" ]; then
				if [ -e "$newname" ]; then
					echo "using cp"
					cp -r "$oldname/." "$newname" && rm -r "$oldname";
				else
					echo "using mv"
					mv "$oldname" "$newname";
				fi
			fi
		fi
	fi
done