#!/bin/bash

SECRETKEY=''
PHONENUM=''

PATH_UNLOCK_FILE="/tmp/gammu_unlock_file"

DATE=`date --date="2 minute ago" +'%Y-%m-%d %H:%M:%S'`
OTP=`oathtool -w 4 --now="$DATE" --totp -b  $SECRETKEY`

OTPFROMCLIENT=`echo $SMS_1_TEXT | awk '{print $NF}'`
CMD=`echo $SMS_1_TEXT | awk '{print tolower($1)}'``
MATCH=`echo $OTP | grep $OTPFROMCLIENT`

UNLOCKDATE=`cat $PATH_UNLOCK_FILE`
CURRENTDATE=`date +%s`
DIFFDATE=$(($CURRENTDATE-$UNLOCKDATE))

if [[ "$DIFFDATE" -lt "1800" ]];then
	TEXT=`echo $SMS_1_TEXT | awk 'BEGIN {ORS=" "} {for (i=2; i<=NF; i++) print $i " "}'`
else
	TEXT=`echo $SMS_1_TEXT | awk 'BEGIN {ORS=" "} {for (i=2; i<NF; i++) print $i " "}'`
fi


if [[ $SMS_1_NUMBER -eq $PHONENUM ]]; then
	if [ -n "$MATCH" ] || [ "$DIFFDATE" -lt "1800" ] ; then
    	case $CMD in
			allo)
				REPLY="A l'huile"
				;;
			help)
				REPLY="PING \$HOST - ping un host; UNLOCK - déverrouille pendant 30 le mode OTP; LOCK - verrouille le mode unlock; REBOOT \$HOST - redémarre l'host distant; CMD \$HOST \$COMMAND - exécute une commande sur l'host distant; PXY \$NUM \$MESSAGE - Envoie un SMS avec le module"
				;;
			ping)
				REPLY=`ping -n -c 2 $TEXT`
				;;
			unlock)
				date +%s > $PATH_UNLOCK_FILE
				REPLY="Système débloqué pour 30 min"
				;;
			lock)
				echo "0" > $PATH_UNLOCK_FILE
				REPLY="Système re-verouillé"
				;;
			reboot)
				ssh root@"$TEXT" 'sudo reboot'
				REPLY="Signal reboot envoyé"
				;;
			cmd)
				HOST=`echo $TEXT | awk '{print $1}'`
				COMMAND=`echo $TEXT | awk 'BEGIN {ORS=" "} {for (i=2; i<=NF; i++) print $i " "}'`
				REPLY=`ssh -oStrictHostKeyChecking=no root@$HOST $COMMAND`
 				;;
			pxy)
				PHONENUM=`echo $TEXT | awk '{print $1}'`
				REPLY=`echo $TEXT | awk 'BEGIN {ORS=" "} {for (i=2; i<=NF; i++) print $i " "}'`
				;;
			*)
 				REPLY="Commande inconnu"
				;;
			esac
	else
		REPLY="Mauvais OTP"
	fi
else
	REPLY="FROM: $SMS_1_NUMBER TEXT: $SMS_1_TEXT"
fi

/usr/bin/sudo /usr/bin/gammu-smsd-inject TEXT $PHONENUM -len 999 -textutf8 "$REPLY"
echo "[$DATE] $PHONENUM - $REPLY" >> /var/log/gammu_receive.log