#!/bin/sh
set -eu

usage() {
	cat <<-'EOF'
		Usage:
		  wms ACTION
		  wms -h
	EOF
}

help() {
	cat <<-'EOF'


		Options:
		  -h, --help    show this message

		  ACTION        one of:
		                - uuid
		                - date
		                - clear-notification


		Helper script to launch CLI commands, without having complex
		quoting, piping, flow control, etc. clutter the wm configuration
		file.


		Examples:

		  Generate a new UUID, copy it to the clipboard and send a
		  desktop notification:

		    $ wms uuid
	EOF
}

for flag in "$@"; do
	case "$flag" in
		(--)
			break
			;;
		(--help)
			usage
			help
			exit
			;;
		(*)
			;;
	esac
done

while getopts 'h' flag; do
	case "$flag" in
		(h)
			usage
			help
			exit
			;;
		(*)
			usage >&2
			exit 2
			;;
	esac
done
shift $((OPTIND - 1))
ACTION="${1:-}"

eval "$(assert-arg -- "$ACTION" 'ACTION')"


copy_and_notify() {
	STR="$1"
	LABEL="$2"
	printf '%s' "$STR" | copy -n
	notify-send -t 5000 -u normal -- \
		"$STR" "$LABEL copied to clipboard"
}

case "$ACTION" in
	uuid)
		copy_and_notify "$(uuid)" 'UUID'
		;;
	date)
		copy_and_notify "$(date '+%Y-%m-%d')" 'date'
		;;
	clear-notification)
		dunstctl close
		;;
	*)
		printf 'Bad ACTION: %s.\n\n' "$ACTION" >&2
		usage >&2
		exit 2
		;;
esac