DIR="/sys/class/power_supply"

if [[ "$BLOCK_INSTANCE" == "" ]]; then
    for BAT in $DIR/BAT*/; do
        [[ -f "${BAT}uevent" ]] && BATS+="$BAT/uevent "
    done
else
    [[ -f "$DIR/BAT$BLOCK_INSTANCE/uevent" ]] && BATS="$DIR/BAT$BLOCK_INSTANCE/uevent"
fi

if [[ "$BATS" == "" ]]; then
    echo " no battery "
    echo "n/a"
    exit 33
fi

cat $BATS | gawk -v LONG="$LONG" -v COLORS="$COLORS" -v BAR="${BAR[*]}" -v COLOR="${COLOR[*]}" -v BW="${BW[*]}" -F "=" '

    BEGIN {
        split(BAR, bar, / /)
        split(COLOR, color, / /)
        split(BW, bw, / /)
        interval = 100 / length(bar)
        efull = 0
        enow = 0
        status = ""
    }

    /POWER_SUPPLY_STATUS=/ {
        if (status == "") {
            if ($2 == "Discharging") {
                status = ""
            } else if ($2 == "Charging") {
                status = "⚡"
            }
        }
    }

    /POWER_SUPPLY_ENERGY_FULL=/ { efull += $2 }
    /POWER_SUPPLY_ENERGY_NOW=/ { enow += $2 }

    END {
        load = enow / efull * 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
            }
        }
    }
'