#!/bin/bash

DIR="/sys/class/power_supply"

[[ "$BLOCK_BUTTON" == "1" ]] && LONG=true

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 $BATS | gawk -F '=' -v LONG="$LONG" '
    BEGIN {
        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 {
        charge = enow / efull * 100
        if (LONG == "true") {
            printf("%s%d%\n", status, charge)
        } else {
            if (charge < 100 / 9) {
                printf("%s▁\n", status)
            } else if (charge < 100 / 9 * 2 ) {
                printf("%s▁\n", status)
            } else if (charge < 100 / 9 * 3 ) {
                printf("%s▂\n", status)
            } else if (charge < 100 / 9 * 4 ) {
                printf("%s▃\n", status)
            } else if (charge < 100 / 9 * 5 ) {
                printf("%s▄\n", status)
            } else if (charge < 100 / 9 * 6 ) {
                printf("%s▅\n", status)
            } else if (charge < 100 / 9 * 7 ) {
                printf("%s▆\n", status)
            } else if (charge < 100 / 9 * 8 ) {
                printf("%s▇\n", status)
            } else {
                printf("%s█\n", status)
            }
        }
        printf("%s%d\n", status, charge)
        if (charge > 25) {
            print("#04B431\n")
        } else if (charge > 20) {
            print("#A8FF00\n")
        } else if (charge > 15) {
            print("#FFF600\n")
        } else if (charge > 10) {
            print("#FFAE00\n")
        } else if (charge > 5) {
            print("#FF0000\n")
        } else {
            exit 33
        }
    }
'