#!/usr/bin/env bash

if [ ! -d /sys/class/power_supply/BAT0 ]; then
    echo "<span color='gray'></span> No battery"
    exit
fi

output="$(acpi -b)"
remaining_time=$(echo "$output" | grep -o "[0-9][0-9]:[0-9][0-9]")
now_charge=$(cat /sys/class/power_supply/BAT0/now_charge)
full_charge=$(cat /sys/class/power_supply/BAT0/full_charge)
charge=$(( (100*now_charge) / full_charge ))
# charge=$(echo "$output" | grep -oP "..(?=%)")

if grep -q "Discharging" <(echo "$output"); then
    remaining_time=$(echo "$output" | grep -oP "..:..(?=:.. remaining)")
    if [[ $charge -lt 20 ]]; then
        icon=""
        color="#FF0000"
    elif [[ $charge -lt 40 ]]; then
        icon=""
        color="#FFAE00"
    elif [[ $charge -lt 60 ]]; then
        icon=""
        color="#FFF600"
    elif [[ $charge -lt 80 ]]; then
        icon=""
        color="#A8FF00"
    else
        icon=""
        color="#00FF00"
    fi
else
    icon=
    color="lightblue"
fi

echo "<span color='$color'>$icon</span> $charge% ($remaining_time)"
echo "$icon $charge% ($remaining_time)"