#!/bin/bash

battery_notify () {
	if [ ${__bat_per} -eq $1 ] && ! grep -q $1 "/tmp/battery.tmp" && [[ ${__bat_power} = $2 ]]; then
		notify-send -u critical -i battery-low "$3"
		echo $1 >> /tmp/battery.tmp
	fi
}

if command -v upower > /dev/null 2>&1 ; then
	__bat_power=$(upower -i /org/freedesktop/UPower/devices/battery_BAT0 | grep state | awk '{print $2}')
	if [[ -n ${__bat_per} ]]; then
		exit
	fi
	__bat_power_ind=""
	if [[ ${__bat_power} = "charging" ]]; then __bat_power_ind=""
		elif [[ ${__bat_power} = "discharging" ]]; then __bat_power_ind=""
		elif [[ ${__bat_power} = "fully-charged" ]]; then __bat_power_ind=""
	fi
	__bat_per=$(upower -i /org/freedesktop/UPower/devices/battery_BAT0 | grep percentage | awk '{print $2}' | sed "s|%||g")
	__time_empt=$(upower -i /org/freedesktop/UPower/devices/battery_BAT0 | grep "time to empty" | awk '{print $4 $5}' | grep -o '^[0-9.]*[a-z]')
	__time_full=$(upower -i /org/freedesktop/UPower/devices/battery_BAT0 | grep "time to full" | awk '{print $4 $5}' | grep -o '^[0-9.]*[a-z]')

	echo -n " ${__bat_power_ind} ${__bat_per}%"
	if [[ ${__bat_power} = "discharging"  ]]; then
		echo " ${__time_empt}"
	else
		echo " ${__time_full}"
	fi

	if [ ! -f "/tmp/battery.tmp" ]; then
		touch /tmp/battery.tmp
	fi

	battery_notify 100 'fully-charged' 'Battery charged!'
	battery_notify  15 'discharging'   'Battery low (15%)!'
	battery_notify  10 'discharging'   'Battery lower (10%)!!'
	battery_notify   5 'discharging'   'Battery critical (5%)!!!'
fi