#!/bin/zsh

date_time() {
        datetime=$(date +"%d %b(%A) %H:%M")
        echo $datetime
}

cpu_load() {
  read cpu a b c previdle rest < /proc/stat
  prevtotal=$((a+b+c+previdle))
  sleep 0.5
  read cpu a b c idle rest < /proc/stat
  total=$((a+b+c+idle))
  cpu=$((100*( (total-prevtotal) - (idle-previdle) ) / (total-prevtotal) ))
  echo -e "CPU: $cpu%"
}

cpu_temp() {
    CEL=$'\xc2\xb0C'
    temp=$( cat /sys/devices/virtual/thermal/thermal_zone0/temp )
    temp=`expr $temp / 1000`
    echo "TEMP: " $temp$CEL
}

root_usage() {
        root=$(df -h / | awk 'NR==2 {print $4 "/" $2}')
        echo "ROOT: "$root
}

home_usage() {
        home=$(df -h /home | awk 'NR==2 {print $4 "/" $2}')
        echo "HOME: "$home
}

mem_usage() {
        mem=$(free -m | grep Mem: | awk '{print$3 / $2 * 100}')
        printf "MEM: %.0f %%" $mem
}

while :; do
	echo $(date_time) > /home/zt/.cache/lemon/clock
	echo $(cpu_load) > /home/zt/.cache/lemon/cpu_load
	echo $(cpu_temp) > /home/zt/.cache/lemon/cpu_temp
	echo $(root_usage) > /home/zt/.cache/lemon/disk_root
	echo $(home_usage) > /home/zt/.cache/lemon/disk_home
	echo $(mem_usage) > /home/zt/.cache/lemon/mem
	sleep 3
done