#!/bin/sh

wobpipe="${XDG_RUNTIME_DIR:-${TMPDIR:-/tmp}}/wobpipe"

usage()
{
	cat <<- EOF
	Usage: ${0##*/} [cmd]
	A helper script for wob the wayland overlay bar

	Example:
	  ${0##*/} wpctl set-volume @DEFAULT_AUDIO_SINK@ 5%-

	EOF
}

err()
{
	: "${1:?}"

	printf "\033[31;1merr: %b\033[0m\n" "$1" 1>&2
	command -v notify-send > /dev/null &&
		notify-send "  wob loader" "$1"
}

render()
{	
	: "${1:?}"

	echo "${1%%.*}" > "$wobpipe"
}

main()
{
	exe="$1"
	shift

	if [ -z "$exe" ]; then
		usage
		exit
	elif [ ! -p "$wobpipe" ]; then
		err "$wobpipe: named pipe does not exist"
		exit 1
	elif ! command -v "$exe" > /dev/null; then
		err "${exe}: command not found"
		exit 127
	fi

	case "$exe" in
	"wpctl")
		wpctl "$@"

		data="$(wpctl get-volume "@DEFAULT_AUDIO_SINK@")"
		render "$(echo "${data##* } * 100" | bc)"
		;;
	"brightnessctl")
		brightnessctl "$@"

		data="$(brightnessctl info | grep -o '[0-9]*%')"
		render "${data%\%}"
		;;
	*)
		err "${exe}: not implemented"
		"$exe" "$@"
	esac
}

main "$@"