#! /bin/sh

is_modem_available()
{
	if [ -z "$(lsusb | grep "2c7c:0125")" ]; then
		return 1
	fi

	return 0
}

is_data_available()
{
	if ! nmcli c show --active | grep -e internet -e gsm > /dev/null; then
		return 1
	fi

	return 0
}

connectivity()
{
	if nmcli c show --active | grep wlan0; then
		return 0
	fi

	if [ $COUNTER -ge 10 ]; then
		COUNTER=0
		if ping -q -W5 -c1 -s0 libredns.gr; then
			return 0
		else

			return 1
		fi
	fi

	COUNTER=$((COUNTER + 1))
	return 0
}

TRY=0
COUNTER=0
while :; do
	if ! is_modem_available ; then
		TRY=$((TRY + 1))
		echo $(date) Restarting modem, $TRY try
		systemctl restart eg25-manager
		systemd-inhibit --what=sleep --why="Modem reset" sleep 60
	elif [ $TRY -ne 0 ]; then
		echo $(date): Modem restarted successfully
		TRY=0
	elif ! is_data_available; then
		echo $(date): Restarting mobile data
		nmcli c down internet
		nmcli c up internet
		systemd-inhibit --what=sleep --why="Restart mobile data" sleep 5
	elif ! connectivity; then
		echo $(date): Connectivity test failed. Restaring modem...
		systemctl restart eg25-manager
		systemd-inhibit --what=sleep --why="modem reset" sleep 60
		TRY=$((TRY + 1))
	fi

	sleep 5
done