#!/usr/bin/env bash
# Low battery notifier

# Kill already running processes
already_running="$(ps -fC 'grep' -N | grep 'low-battery.sh' | wc -l)"
if [[ $already_running -gt 1 ]]; then
	pkill -f --older 1 'low-battery.sh'
fi

while [[ 0 -eq 0 ]]; do
	battery_status="$(cat /sys/class/power_supply/BAT1/status)"
	battery_charge="$(cat /sys/class/power_supply/BAT1/capacity)"

	if [[ $battery_status == 'Discharging' && $battery_charge -le 25 ]]; then
		if   [[ $battery_charge -le 5 ]]; then
			notify-send --icon="${XDG_CONFIG_HOME:-~/.config}/dunst/images/Low-Battery.png" --urgency=critical "Battery critical!" "${battery_charge}%"
			sleep 180
		elif [[ $battery_charge -le 10 ]]; then
			notify-send --icon="${XDG_CONFIG_HOME:-~/.config}/dunst/images/Low-Battery2.png" --urgency=critical "Battery critical!" "${battery_charge}%"
			sleep 600
		elif [[ $battery_charge -le 15 ]]; then
			notify-send --icon="${XDG_CONFIG_HOME:-~/.config}/dunst/images/Low-Battery2.png" "Battery low!" "${battery_charge}%"
			sleep 600
		elif [[ $battery_charge -le 20 ]]; then
			notify-send --icon="${XDG_CONFIG_HOME:-~/.config}/dunst/images/Low-Battery2.png" "Battery low!" "${battery_charge}%"
			sleep 600
		else
			sleep 600
		fi
	else
		sleep 1200
	fi
done