#!/bin/sh

. slib

help() {
cat << EOF
${0}: Wrapper script to set wallpapers
options:
 -d [File]       Select a wallpaper or a directory
 -c              Remove the current wallpaper
 -h              Print this message and exit

NOTE: default directory is ~/.config/wallpapers
EOF

exit 0
}

check_program "xwallpaper"

if [ "${#}" = 0 ]; then
	#FIXME: use XDG_CONFIG
	input="${HOME}/.config/wallpapers"
elif [ "${#}" != 1 ] && [ "${#}" != 2 ]; then
	invalid_use
fi

while getopts "hcd:" option; do
	case "${option}" in
	c) run "xwallpaper --clear" ;;

	d) input="${OPTARG}" ;;

	h) help ;;

	*) invalid_use -h ;;

	esac
done

shift $((OPTIND - 1))

[ "${#}" != 0 ] && invalid_use

if [ -n "${input}" ]; then
	case $(file -L -b --mime-type "${input}") in
	image/*) image="${input}" ;;

	inode/directory) waldir="${input}" ;;

	*) err "Couldn't read given file" ;;
	esac
fi

if [ -n "${waldir}" ]; then
	image=$(find "${waldir}" -iregex '.*.\(jpg\|jpeg\|png\|gif\)' 2>/dev/null \
	| shuf -n 1 )
fi

[ -z "${image}" ] && err "No image file found"

run "xwallpaper --zoom ${image}" "${image}"