#!/usr/bin/env bash

#gotify_server="https://gotify.photos-nas.ovh"
host=$(hostname)
#available=false
#msg=
#infos=

MSMTP=$(which msmtp)
SSMTP=$(which ssmtp)

if [ -n $MSMPT ] ; then  
	MAIL=$MSMTP
elif [ -n $SSMTP ] && [ -z $MAIL ] ; then
	MAIL=$SSMTP
else
	echo "No msmtp or ssmtp binary found in PATH: $PATH" ; exit 1
fi

dotenv () {
  set -a
  # shellcheck disable=SC1091
  [ -f ".env" ] && . ".env" ||  echo -e "${red}\nNo .env file found ! No token for gotify.${reset}"
  set +a
}

send_notification() {
FromHost=$(hostname)

# User variables:
SendMailFrom="router@clicclac.info"
SendMailTo="router@clicclac.info"
SubjectTag="monitor_ip.sh"

printf "\nEnvoi d'une notification email ...\n"

$MAIL $SendMailTo << __EOF
From: "$FromHost" <$SendMailFrom>
date:$(date -R)
To: <$SendMailTo>
Subject: [$SubjectTag] L IP sur $FromHost a changée !
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit

Ancienne IP: $old_ip_externe
Nouvelle IP: $ip_externe

__EOF
}


dotenv

old_ip_externe=$(cat monitor-ip.pref)

ip_externe=$(dig @resolver4.opendns.com myip.opendns.com +short)
echo $ip_externe > ip-monitor.pref

if [ "$ip_externe" != "$old_ip_externe" ]; then
#if [ "$ip_externe" == "$old_ip_externe" ]; then
    echo "L'IP externe a changé"
    echo "IP externe: $ip_externe"
    
	#msmtp -d -t < email_monitor_ip.txt
	send_notification

	#echo -e "Sending notification to $gotify_server ..."
	#TITLE="IP has changed on $host"
	#MESSAGE="**A new version of Pi-hole is available:**\n\n $msg\n\n $infos\n\n Please run *pihole -up* on $host to update !"
	#PRIORITY=8
	#URL="$gotify_server/message?token=$token&?format=markdown"
	#URL="$gotify_server/message?token=$token"

	# --output /dev/null 
	#curl --with-ca-bundle /opt/etc/ssl/cert.pem -L -S -v --data '{"message": "'"${MESSAGE}"'", "title": "'"${TITLE}"'", "priority":'"${PRIORITY}"', "extras": {"client::display": {"contentType": "text/markdown"}}}' -H 'Content-Type: application/json' "$URL"
	#curl -k -L -S -v --data '{"message": "'"${MESSAGE}"'", "title": "'"${TITLE}"'", "priority":'"${PRIORITY}"', "extras": {"client::display": {"contentType": "text/markdown"}}}' -H 'Content-Type: application/json' "$URL"

	#wget "https://gotify.photos-nas.ovh/message?token=$token" --ca-certificate=/usr/syno/etc/certificate/_archive/mqkgNA/chain.pem --no-check-certificate --post-data "title=$TITLE&message=$MESSAGE&priority=$PRIORITY" -O /dev/null
	
else
    echo "L'IP externe n'a pas changé"
    echo "IP externe: $ip_externe"
fi