#!/bin/sh

threshold=20
very_low_threshold=10

amount="low"
prev_cap=100

while true; do
	cap=$(cat /sys/class/power_supply/BAT0/capacity)
	status=$(cat /sys/class/power_supply/BAT0/status)

	# when capacity changes
	if [ $cap -ne $prev_cap ]; then

		# notify when drop under threshold
		if [ $cap -lt $threshold ] && [ $prev_cap -ge $threshold ]; then
			notify-send "Plug In" "Battery has fallen under $threshold%"
		fi
	
		# notify every percent if very low
		if [ $cap -le $very_low_threshold ] && [ $status -ne "Charging" ]; then
			notify-send "BATTERY LOW" "Battery is at $bat%"
		fi

	fi

	prev_cap=$cap
	sleep 10
done