#!/bin/sh

PATTERN="."
[ -z "$VIS_MENU" ] && VIS_MENU="slmenu"
[ -z "$VIS_MENU_ARGS" ] && VIS_MENU_ARGS="-b"

while [ $# -gt 0 ]; do
	case "$1" in
	-h|--help)
		echo "usage: $(basename $0) [-h] [-p prompt] [file-pattern]"
		exit 0;
		;;
	-p)
		VIS_MENU_ARGS="$VIS_MENU_ARGS -p $2"
		shift
		shift
		;;
	*)
		PATTERN=$*
		break
		;;
	esac
done

if ! type "$VIS_MENU" >/dev/null 2>&1; then
	if [ ! -z "$DISPLAY" ] && type "dmenu" >/dev/null 2>&1; then
		VIS_MENU="dmenu"
	else
		echo "Neither slmenu nor dmenu found" >&2
		exit 1
	fi
fi

DIR=""
[ ! -z "$PATTERN" -a "$PATTERN" != "." -a -d "$PATTERN" ] && DIR="$PATTERN"

while true; do
	SEL=$({ echo ..; ls -1 $PATTERN; } | $VIS_MENU $VIS_MENU_ARGS)
	[ -z "$SEL" ] && exit 1
	[ ! -z "$DIR" ] && SEL="$DIR/$SEL"
	if [ -d "$SEL" ]; then
		DIR="$SEL"
		PATTERN="$DIR"
	else
		echo "$SEL"
		exit 0
	fi
done