#!/bin/bash

CPU_LIMIT=14

start_lora()
{
	bash /usr/local/bin/lora-nfuse-start.clv
	STATUSNFUSESTART=$?
	echo "status nfuse start $STATUSNFUSESTART"
	if [ $STATUSNFUSESTART -eq 1 ]; then
		bash /usr/local/bin/lora-nfuse-start.clv 1
	fi
}

LORA_CPU=$(ps -eo pcpu,fname | grep lora_pkt | sed 's+ lora_pkt++')
if [ "$LORA_CPU" == "" ]; then
	echo "No CPU usage: $LORA_CPU from lora_pkt process found"
	start_lora
	exit
fi

CPU_USAGE=$(echo $LORA_CPU \* 10 | bc -l | sed 's+\.0++')

# if DEBUG print some values
if [ "$1" == "-d" ]; then
	echo USAGE: ${CPU_USAGE}% CPU: $LORA_CPU
fi

if [ "$CPU_USAGE" == "" ]; then
	echo "No lora_pkt_fwd process."
	start_lora
	exit
fi

# BUG? top says 100% but ps says 37-40 CPU usage
# BUG? top says 100% but ps says 15 CPU usage
# Normal cpu usage is 3%
if [ $CPU_USAGE -gt $CPU_LIMIT ]; then
	echo More than $CPU_LIMIT, pcpu: $CPU_USAGE
	echo "restarting lora CPU: $CPU_USAGE" | mail -s "LoRa HANG!" `whoami` 
	start_lora
	exit
fi

cat /var/log/lora.log | tail -9 | grep -q "CRC_OK: 0\.00.*CRC_FAIL: 0\.00.*NO_CRC: 0\.00"
if [ $? -eq 0 ]; then
	echo Concentrator hang. No CRC reporting.
	echo "restarting lora_packet_fwd" | mail -s "Zero LoRa packets. Probably hang." `whoami` 
	start_lora
	exit
fi