#!/bin/bash

GREEN="<span foreground='#8cff8a'>"
NC="</span>"
battery_full=$(echo -e "\uf240")
battery_75=$(echo -e "\uf241")
battery_50=$(echo -e "\uf242")
battery_25=$(echo -e "\uf243")
battery_empty=$(echo -e "\uf244")
battery_charging=$(echo -e "${GREEN}\uf240${NC}")

icon="${battery_full}"

percent="$(upower -d | awk '/percentage/ {print $2}' | head -n 1 | cut -d% -f1)"
remaining="$(upower -d | awk -F: '/time to empty/ {print $2}' | awk '{print $1,$2}' | head -n 1)"

if upower -d | grep '\bcharging\b' >/dev/null 2>&1; then
    icon="${battery_charging}"
    echo "${icon} ${percent}%"
elif upower -d | grep '\bdischarging\b' >/dev/null 2>&1; then
    if [ "$percent" -lt 25 ]; then
        icon="${battery_25}"
    elif [ "$percent" -lt 50 ]; then
        icon="${battery_50}"
    elif [ "$percent" -lt 75 ]; then
        icon="${battery_75}"
    fi
    if [ "$percent" -lt "$THRESHOLD" ]; then
        icon="${battery_empty}"
        notify-send "CHARGE BATTERY"
        for file in /dev/pts/*; do
            if [ "$(ls -l "$file" | awk '{print $5}')" = '136,' ]; then
                echo "CHARGE BATTERY" >> "$file"
            fi
        done
    fi
    echo "${icon} ${percent}% (${remaining})"
else
    echo ""
fi