#! /usr/bin/env bash

entropy() {
	entropy=$(cat /proc/sys/kernel/random/entropy_avail)
	echo -e "Entr.: $entropy"
}

iface() {
	# if Docker isn't installed, write '1p' insted of '2p'
	# iface=$(ls /sys/class/net/ | tr " " "\n" | sed -n '2p')
	# ip=$(ip addr show $iface | awk '{print $2}' | sed -n '3p')
	# echo -e "$iface: $ip"
	ip=$(hostname -i)
	echo -e "IP: $ip"
}

kernelver() {
	kernelver=$(uname -r)
	echo -e "Kernel: $kernelver"
}

home() {
	# disk=$(df -h | awk 'NR==9{print $3, $5}')
	home=$(df -h | awk 'NR==9{print $3}')
	echo -e "/home: $home"
}

root() {
	# disk=$(df -h | awk 'NR==4{print $3, $5}')
	root=$(df -h | awk 'NR==4{print $3}')
	echo -e "/: $root"
}

memory() {
	# memory=$(free | awk '/Mem/ {printf "%dMB / %dMB\n", $3 / 1024.0, $2 / 1024.0 }')
	memory=$(free | awk '/Mem/ {printf "%d MB\n", $3 / 1024.0, $2 / 1024.0 }')
	echo -e "RAM: $memory"
}

cpu() {
	cpu=$(top -bn1 | grep "Cpu(s)" | sed "s/.*, *\([0-9.]*\)%* id.*/\1/" | awk '{print 100 - $1"%"}')
	echo -e "CPU: $cpu"
}

battery() {
	battery=$(cat /sys/class/power_supply/BAT0/capacity)
	echo -e "Bat.: $battery%"
}

volume() {
	volume=$(amixer get Master | awk -F'[][]' 'END{ print $4":"$2 }' | sed 's/on://g')
	echo -e "Vol.: $volume"
}

brightness() {
	brightness=$(xbacklight -get | sed 's/\..*$//')
	echo -e "Bright.: $brightness%"
}

strengthness() {
	strengthness=$(iwconfig wlp2s0 | grep -oP -- '-\d+ dBm')
	echo -e "Wi-Fi stren.: $strengthness"
}

SLEEP_SEC=5

while :; do
	echo "$(volume) | $(battery) | $(memory) | $(strengthness) | $(home) |"
	sleep $SLEEP_SEC
done