#!/bin/bash

usage()
{
    echo "Usage: $0 -z UUID -d days -r folder -s server" >&2
    exit 1
}

while getopts "z:d:r:s:" opt;
do
    case "$opt" in
        z)
	    UUID=$OPTARG
	    ;;
        d)
        DAYS=$OPTARG
        ;;
        r)
        FOLDER=$OPTARG
        ;;
        s)
        SERVER=$OPTARG
        ;;
        *)
	    usage
	    ;;
    esac
done

shift $((OPTIND-1))

if [ -z "${UUID}" ] || [ -z "${DAYS}" ] || [ -z "${FOLDER}" ] || [ -z "${SERVER}" ]; then
    usage
fi

BRAND=`/usr/sbin/vmadm get $UUID | json brand | tr -d '\n'`

RUTADESTINO="/zones/tools/mounts"
RUTAORIGEN="/export/ftpbackup/${FOLDER}"
SERVIDOR="${SERVER}"

mkdir -p $RUTADESTINO
mount $SERVIDOR:$RUTAORIGEN $RUTADESTINO

if [ $? != 0 ]; then
    echo "MOUNT FAILED."
    umount $RUTADESTINO
    exit
fi

mkdir -p $RUTADESTINO/$UUID

if [ $? != 0 ]; then
    echo "FAIL TO CREATE FOLDER $UUID."
    umount $RUTADESTINO
    exit
fi

# mantain backups of the last N days
find $RUTADESTINO/$UUID -type f -mtime +$DAYS -delete

snapshot()
{
    /usr/sbin/zfs snapshot zones/$1@`date +%Y%m%d`
    /usr/sbin/zfs send zones/$1@`date +%Y%m%d` > $RUTADESTINO/$UUID/$1@`date +%Y%m%d` 
}

snapshot $UUID

if [ $BRAND = "kvm" ] || [ $BRAND = "bhyve" ] ; then
    snapshot $UUID-disk0
elif [ $BRAND = "bhyve" ]; then
    snapshot $UUID-disk0
fi

/usr/sbin/zonecfg -z $UUID export > $RUTADESTINO/$UUID/$UUID.`date +%Y%m%d`.cfg

umount $RUTADESTINO