DIR="/sys/class/backlight"
if [[ -d "$DIR/acpi_video0" ]]; then
   DIR="$DIR/acpi_video0"
elif [[ -d "$DIR/intel_backlight" ]]; then
   DIR="$DIR/intel_backlight"
else
   printf "no backlight\nn/a\n"
   exit 33
fi

cat "$DIR/brightness" "$DIR/max_brightness" | gawk -v BAR="${BAR[*]}" -v BW="${BW[*]}" -v COLORS="$COLORS" -v COLOR="${COLOR[*]}" -v LONG="$LONG" '

    BEGIN {
        split(BAR, bar, / /)
        split(COLOR, color, / /)
        split(BW, bw, / /)
        interval = 100 / length(bar)
    }

    NR == 1 { current_brightness = $1 }
    NR == 2 { maximum_brightness = $1 }

    END {
        load = ( current_brightness / maximum_brightness ) * 100
        if (LONG) {
            printf("%d%\n%d\n", load, load)
        } else {
            for (i in bar) {
                if (load <= i * interval) {
                    printf("%s\n%s\n", bar[i], bar[i])
                    break
                }
            }
        }
        for (i in bw) {
            if (load <= i * interval) {
                if (COLORS) {
                    printf("%s\n", color[i])
                } else {
                    printf("%s\n", bw[i])
                }
                break
            }
        }
    }
'