#!/bin/zsh
REQUIRED_ENV+=(DESKTOP__WALLPAPER_PATH)
#####################################################################

MAIN() {
	[ ! -d $WALLPAPER_PATH ] \
		&& FAIL 1 "no such directory for DESKTOP__WALLPAPER_PATH='$DESKTOP__WALLPAPER_PATH'"

	SELECTION="$1"
	[ ! $SELECTION ] && SELECTION=random

	case $SELECTION in
		random )
			feh --recursive --randomize --bg-fill $WALLPAPER_PATH
			;;
		* )
			[ ! -f $DESKTOP__WALLPAPER_PATH/$SELECTION ] \
				&& FAIL 2 "no such wallpaper '$SELECTION' in wallpaper path"

			feh --bg-fill $DESKTOP__WALLPAPER_PATH/$SELECTION
			;;
	esac
}