#!/bin/sh

reset="\033[0m"
normal="\033[10m"
big="\033[11m"
red="\033[31m"
green="\033[32m"
orange="\033[33m"

cache=/tmp/cpubarscache
temp=$(sensors | awk '/CPU/ {printf ("%.f°C", $2)}' | tr -d "+")
[ -n "$temp" ] && temp="$temp "
stats=$(awk '/cpu[0-9]+/ {printf "%d %d %d\n", substr($1,4), ($2 + $3 + $4 + $5), $5 }' /proc/stat 2>/dev/null)
[ ! -f $cache ] && echo "$stats" >"$cache"
old=$(cat "$cache")
printf "%b" "$big $normal$temp"
echo "$stats" | while read -r row; do
	id=${row%% *}
	rest=${row#* }
	total=${rest%% *}
	idle=${rest##* }
	case "$(echo "$old" | awk '{if ($1 == id)
		printf "%d\n", (1 - (idle - $3)  / (total - $2))*100 /12.5}' \
		id="$id" total="$total" idle="$idle")" in
	"0") printf "%b" "$green▁" ;;
	"1") printf "%b" "$green▂" ;;
	"2") printf "%b" "$green▃" ;;
	"3") printf "%b" "$orange▄" ;;
	"4") printf "%b" "$orange▅" ;;
	"5") printf "%b" "$orange▆" ;;
	"6" | "7" | "8") printf "%b" "$red▇" ;;
	esac
done
printf "%b" "$reset\n"
echo "$stats" >"$cache"