#!/bin/sh

. slib

help() {
cat << EOF
${0}: Wrapper script to take screenshots
options:
 -n              Black screen
 -b              Blur
 -c              Take the current state of the desktop
 -h              Print this message and exit
EOF

exit 0
}

check_program "slock"

blur=0
set_current_state=0
current_wallpaper="${XDG_CACHE_HOME:-$HOME/.cache}/wallpaper/current"
while getopts "bcnh" option; do
	case "${option}" in
	b)
		check_program "mogrify" "imagemagick must be installed"
		blur=1 ;;

	c)
		check_program "scrot"
		set_current_state=1
	;;
	n)
		slock
		exit 0;;

	h) help ;;

	*) invalid_use -h ;;

	esac
done

shift $((OPTIND - 1))

[ "${#}" -eq 0 ] || invalid_use

background="/tmp/$(date '+%b%d::%H%M%S').png"

if [ "$set_current_state" -eq 0 ]; then
	# Avoid distorting the wallpaper when calling `mogrify`
	cp "${current_wallpaper}" "${background}"
else
	scrot -z "${background}"
fi

[ "${blur}" -eq 1 ] && mogrify -blur 0x8 "${background}"

slock -f "${background}"