#!/bin/bash

XMRIGCFG=/opt/gupax/gupaxx/xmrig/config.json
HIGHTHRESHOLD=96
LOWTHRESHOLD=90
CURRENTPERCENTAGE=$(grep max-threads-hint $XMRIGCFG | cut -d " " -f 2 | cut -d "," -f 1 | cut -d "%" -f 1)

# CPU average over 10 seconds
CPU=$(top -bn1 | grep "Cpu(s)" | sed "s/.*, *\([0-9.]*\)%* id.*/\1/" | awk '{print 100 - $1"%"}' | cut -d "." -f 1 | cut -d "%" -f 1)
#echo "CPU = $CPU"
#echo "CPU Percentage = $CURRENTPERCENTAGE"

if [ "$CPU" -le "$LOWTHRESHOLD" ]
then
	#echo "less than"
	let "NEWPERCENTAGE = $CURRENTPERCENTAGE + 5"
	if [ "$NEWPERCENTAGE" -gt "100" ]
	then
		NEWPERCENTAGE=100
	fi
	echo "Increasing XMRIG CPU Percentage from $CURRENTPERCENTAGE to $NEWPERCENTAGE" | /usr/bin/logger --tag=xmrig
	sed -i "s/\"max-threads-hint\": ${CURRENTPERCENTAGE},/\"max-threads-hint\": ${NEWPERCENTAGE},/g" $XMRIGCFG
elif [ "$CPU" -ge "$HIGHTHRESHOLD" ]
then
	#echo "higher than"
	let "NEWPERCENTAGE = $CURRENTPERCENTAGE - 5"
	if [ "$NEWPERCENTAGE" -lt "5" ]
	then
		NEWPERCENTAGE=5
	fi
	echo "Decreasing XMRIG CPU Percentage from $CURRENTPERCENTAGE to $NEWPERCENTAGE" | /usr/bin/logger --tag=xmrig
	sed -i "s/\"max-threads-hint\": ${CURRENTPERCENTAGE},/\"max-threads-hint\": ${NEWPERCENTAGE},/g" $XMRIGCFG
fi