#!/bin/bash

function send_notification() {
    brightness=$(printf "%.0f\n" $(brightnessctl i | grep -i current | awk '{print $4}' | sed 's/(//' | sed 's/)//'))
    dunstify -a "changebrightness" -u low -r "9992" -h int:value:"$brightness" "brightness: ${brightness}%" -t 2000
}

case $1 in
up)
    brightnessctl s +25 -q
    send_notification $1
    ;;
down)
    brightnessctl s 25- -q
    send_notification $1
    ;;
esac