#!/bin/sh
set -eu


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

help() {
	cat <<-'EOF'


		Options:
		  -h, --help    show this message


		Run a TUI stopwatch.


		Examples:

		  Just run it:

		    $ stopwatch
	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))


date "+%l:%M:%S%p: stopwatch started (^D to stop)"
time cat
date "+%l:%M:%S%p: stopwatch stopped"