#!/bin/bash

VERSION=1

#############################################################################################
# VARA running on wine will not release and reopen the ports
# after a connection is made over a network.
# This script will monitor vara for ports not reopening correctly.
# Once a port failure is detected, it will close and re open VARA which
# is a crude way to reset the ports but the only one that works for now.
# VARA FM is the default modem but you can use VARA HF by calling
# it when the script is started. To start FM mode, simply run
#	./vara_monitor
# to start HF mode, modify the command and start with
#	./vara_monitor HF
#
# This script is specifically designed to run on the Raspberry Pi
# and will not work on other versions of Linux.
#
# 19NOV2022 KM4ACK
##############################################################################################

# user variables##############################################################################
WAIT_TIME=240		#seconds to wait so connections can finish before restarting VARA.
			          #Note: this time is doubled automatically for HF connections.
		          	#Increasing this time allows for longer connections but also
		          	#increases the time between restarts. Change the WAIT_TIME to
	          		#suit your individual needs. Default is 240 seconds for FM and
	          		#480 seconds (8 minutes) for HF

RIG_CONTROL=YES		#YES/NO. If set to YES this script 
			            #assumes FLRIG is configured for rig control.
# End user variables #########################################################################

#start of main script
#set modem start and give user feedback if HF
if [ $1 = "HF" ]; then
	MODEM_START="HF"
	clear;echo;echo
	echo "Doubling connection timeout \"WAIT_TIME\""
	WAIT_TIME=$(echo $(($WAIT_TIME*2)))
	echo "WAIT_TIME is now $WAIT_TIME seconds"
	sleep 5
else
	MODEM_START="FM"
fi

clear;echo;echo
if [ "$RIG_CONTROL" = 'YES' ]; then
	#verify FLRIG is running
	FLRIG_RUN=$(pidof flrig)
	while [ -z "$FLRIG_RUN" ]; do
		echo "Please start FLRIG"
		sleep 1
		FLRIG_RUN=$(pidof flrig)
		clear;echo;echo
	done


	echo "FLRIG seems to be running...standby"
	#give FLRIG a few of seconds to start
	for i in {03..01}
		do
		tput cup 2 36
		echo -n "$i"
		sleep 1
	done
fi

MAIN(){
	if [ "$RIG_CONTROL" = 'YES' ]; then
		#start rigctld if not running
		if [ -z `pidof rigctld` ]; then
			/usr/local/bin/rigctld -m 4 &
		fi
	fi

	clear;echo;echo
	#verify vara has been started
	VARA_RUN=$(ps aux | grep wine | grep -i vara | head -1 | awk '{print $2}')
	while [ -z "$VARA_RUN" ]; do
		echo "Configured for VARA $MODEM_START"
		echo "**Modem not running**"
		echo "Please start the modem"
		sleep 1
		VARA_RUN=$(ps aux | grep wine | grep -i vara | head -1 | awk '{print $2}')
		clear;echo;echo
	done	
	echo "VARA seems to be running...standby"
	#wait for vara modem to start
	for i in {15..01}
		do
		tput cup 2 35
		echo -n "$i"
		sleep 1
	done
	#setup time variables
	seconds=1
	minutes=0
	hours=0
	#monitor ports which will close after a network connection
	#both ports 8300 & 8301 needed but we only need to check for one of them.
	VARA_CK=$(sudo netstat -tunlp | grep 8300)
	while [ -n "$VARA_CK" ]; do
		clear;echo;echo
		echo "##########################"
		echo "# KM4ACK VARA Monitor v${VERSION} #"
		echo "##########################"
		echo "Monitoring VARA ports"
		echo "press ctrl+c to stop"
		echo "Elasped time - ${hours}:${minutes}:${seconds}"
		VARA_CK=$(sudo netstat -tunlp | grep 8300)
		((seconds++))
		if [ $seconds = 60 ]; then
			((minutes++))
			seconds=0
		fi

		if [ $minutes = 60 ]; then
			((hours++))
			minutes=0
			seconds=0
		fi
		sleep 1
	done
	clear;echo;echo
	#give connections time to complete before restarting vara
	#this timeout is defined above as WAIT_TIME
	echo "Port closure detected!"
	echo "Starting reset procedure"
	for i in $(eval echo "{$WAIT_TIME..01}")
		do
		tput cup 3 25
		echo -n "$i"
		sleep 1
	done
	#kill current vara session
	clear;echo;echo
	echo "Done waiting, hope the connection was finished"
	echo "If not, increate the WAIT_TIME which is currently $WAIT_TIME seconds"
	echo "killing VARA $MODEM_START"
	#get PID's of VARA & kill
	FIRST=$(ps aux | grep wine | grep -i vara | head -1 | awk '{print $2}')
	SECOND=$(ps aux | grep wine | grep -i vara | tail -1 | awk '{print $2}')
	kill -9 $FIRST > /dev/null 2>&1 &
	kill -9 $SECOND > /dev/null 2>&1 &
	sleep 3

	clear;echo;echo
	#wait 61 seconds before restarting. This gives the ports time to clear
	#so they are ready for the next run
	echo "restarting VARA $MODEM_START in"
	for i in {61..01}
		do
		tput cup 2 22
		echo -n "$i"
		sleep 1
	done

	#restart the correct modem
	if [ "$MODEM_START" = 'HF' ]; then
		/usr/local/bin/wine $HOME/.wine/drive_c/VARA/VARA.exe > /dev/null 2>&1 &
	elif [ "$MODEM_START" = 'FM' ]; then
		/usr/local/bin/wine $HOME/.wine/drive_c/VARA\ FM/VARAFM.exe > /dev/null 2>&1 &
	fi

}

#run this script in a loop
while true; do
	MAIN
done