#!/bin/bash

if command -v brillo &> /dev/null; then
    function send_notification() {
        brightness=$(printf "%.0f\n" "$(brillo -G)")
        dunstify -a "changebrightness" -u low -r 9991 -h int:value:"$brightness" -i "brightness-$1" "Brightness: $brightness%" -t 2000
    }

    case $1 in
        up)
            brillo -A 5 -q -u 150000
            send_notification "$1"
            ;;
        down)
            brillo -U 5 -q -u 150000
            send_notification "$1"
            ;;
    esac
fi