#!/usr/bin/fish
xbacklight $argv[1..-1]

set file /tmp/notify-brightness.id
set age (find "$file" -cmin -0.2)

set brightness (xbacklight -get)
set bar (seq -s "─" 0 (math $brightness / 3) | tr -d '[:digit:]')

set percentage (printf '%44s%d%%' '' "$brightness")
set body "$percentage\n   $bar"

if [ -n "$age" ]
    dunstify -r (cat "$file") "Brightness" "$body"
    touch "$file"
else
    set id (dunstify -p "Brightness" "$body")
    echo $id > "$file"
    chmod 600 "$file"
end