#!/bin/bash

DIR="/sys/class/backlight"
[[ "$BLOCK_INSTANCE" =~ "color" ]] && COLORS=True
[[ "$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
   printf "no backlight\nn/a\n"
   exit 33
fi

BAR=("▁" "▂" "▃" "▄" "▅" "▆" "▇" "█")
COLOR=("#64bc01" "#77a601" "#8a9101" "#9d7b00" "#b06701" "#c45100" "#d63c00" "#e92700")
BW=("#565656" "#6d6d6d" "#848485" "#9c9c9c" "#b1b1b1" "#c7c7c7" "#dcdcdc" "#f5f5f6")

cat "$DIR/brightness" "$DIR/max_brightness" | gawk -v BAR="${BAR[*]}" -v COLOR="${COLOR[*]}" -v BW="${BW[*]}" -v COLORS="$COLORS" -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 {
        brightness = ( current_brightness / maximum_brightness ) * 100
        if (LONG) {
            printf("%d%\n%d\n", brightness, brightness)
        } else {
            for (i in bar) {
                if (brightness <= i * interval) {
                    printf("%s\n%s\n", bar[i], bar[i])
                    break
                }
            }
        }
        for (i in bw) {
            if (brightness <= i * interval) {
                if (COLORS) {
                    printf("%s\n", color[i])
                } else {
                    printf("%s\n", bw[i])
                }
                break
            }
        }
    }
'