#!/bin/bash

DIR="/sys/class/backlight"

[[ "$BLOCK_INSTANCE" =~ "color" ]] && MODE="color" || MODE="bw"
[[ "$BLOCK_INSTANCE" =~ "long" || "$BLOCK_BUTTON" == 1 ]] && LONG=true

if [[ -d "$DIR/acpi_video0" ]]; then
   DIR="$DIR/acpi_video0"
elif [[ -d "$DIR/intel_backlight" ]]; then
   DIR="$DIR/intel_backlight"
else
   echo " no backlight "
   echo "n/a"
   exit 33
fi

cat "$DIR/brightness" "$DIR/max_brightness" | gawk -v MODE="$MODE" -v LONG="$LONG" '
    NR==1 { cbr = $1 }
    NR==2 { mbr = $1 }
    END {
        load = ( cbr / mbr ) * 100
        if (LONG == "true") {
            printf("%d%\n", load)
            printf("%d%\n", load)
        } else {
            if (load < 100 / 9) {
                printf("▁\n▁\n")
            } else if (load < 100 / 9 * 2 ) {
                printf("▁\n▁\n")
            } else if (load < 100 / 9 * 3 ) {
                printf("▂\n▂\n")
            } else if (load < 100 / 9 * 4 ) {
                printf("▃\n▃\n")
            } else if (load < 100 / 9 * 5 ) {
                printf("▄\n▄\n")
            } else if (load < 100 / 9 * 6 ) {
                printf("▅\n▅\n")
            } else if (load < 100 / 9 * 7 ) {
                printf("▆\n▆\n")
            } else if (load < 100 / 9 * 8 ) {
                printf("▇\n▇\n")
            } else {
                printf("█\n█\n")
            }
        }
        if (MODE == "color") {
            if (load < 60) {
                print("#04B431\n")
            } else if (load < 50) {
                print("#A8FF00\n")
            } else if (load < 80) {
                print("#FFF600\n")
            } else if (load < 90) {
                print("#FFAE00\n")
            } else {
                print("#FF0000\n")
            }
        } else {
            printf("\n")
        }
    }
'