#!/bin/bash

#rbt

# clone fe:SOURCE host:remote_system_ds/disk.i size
#   - fe is the front-end hostname
#   - SOURCE is the path of the disk image in the form DS_BASE_PATH/disk
#   - host is the target host to deploy the VM
#   - remote_system_ds is the path for the system datastore in the host

SRC=$1
DST=$2
VM_ID=$3
DS_ID=$4

if [ -z "${ONE_LOCATION}" ]; then
    TMCOMMON=/var/lib/one/remotes/tm/tm_common.sh
else
    TMCOMMON=$ONE_LOCATION/var/remotes/tm/tm_common.sh
fi

DRIVER_PATH=$(dirname $0)

source $TMCOMMON
source ${DRIVER_PATH}/../../datastore/libfs.sh

#-------------------------------------------------------------------------------
# Set dst path and dir
#-------------------------------------------------------------------------------

DST_PATH=`arg_path $DST`
DST_HOST=`arg_host $DST`
DST_DIR=`dirname $DST_PATH`

DS_SYS_ID=$(echo $DST_DIR | $AWK -F '/' '{print $(NF-1)}')

ssh_make_path $DST_HOST $DST_DIR

#-------------------------------------------------------------------------------
# Get Image information
#-------------------------------------------------------------------------------

DISK_ID=$(basename ${DST_PATH} | cut -d. -f2)

XPATH="${DRIVER_PATH}/../../datastore/xpath.rb --stdin"

unset i j XPATH_ELEMENTS

#rbt: add DRIVER XPATH
while IFS= read -r -d '' element; do
    XPATH_ELEMENTS[i++]="$element"
done < <(onevm show -x $VM_ID| $XPATH \
                    /VM/LCM_STATE \
                    /VM/TEMPLATE/DISK[DISK_ID=$DISK_ID]/SIZE \
                    /VM/TEMPLATE/DISK[DISK_ID=$DISK_ID]/ORIGINAL_SIZE \
                    /VM/TEMPLATE/DISK[DISK_ID=$DISK_ID]/DRIVER \
                    /VM/TEMPLATE/DISK[DISK_ID=$DISK_ID]/DATASTORE_ID \
                    /VM/TEMPLATE/DISK[DISK_ID=$DISK_ID]/IMAGE_ID \
                    /VM/TEMPLATE/DISK[DISK_ID=$DISK_ID]/TARGET \
                    /VM/TEMPLATE/DISK[DISK_ID=$DISK_ID]/TYPE \
                    /VM/HISTORY_RECORDS/HISTORY[last\(\)]/TM_MAD)

#rbt: add DRIVER var
LCM_STATE="${XPATH_ELEMENTS[j++]}"
SIZE="${XPATH_ELEMENTS[j++]}"
ORIGINAL_SIZE="${XPATH_ELEMENTS[j++]}"
DRIVER="${XPATH_ELEMENTS[j++]}"
DATASTORE_ID="${XPATH_ELEMENTS[j++]}"
IMAGE_ID="${XPATH_ELEMENTS[j++]}"
TARGET="${XPATH_ELEMENTS[j++]}"
TYPE_DISK="${XPATH_ELEMENTS[j++]}"
TM_MAD="${XPATH_ELEMENTS[j++]}"


ORIG_LV_NAME="vg-one-${DATASTORE_ID}/lv-one-image-${IMAGE_ID}"
ORIG_DEV="/dev/vg-one-${DATASTORE_ID}/lv-one-image-${IMAGE_ID}"
LV_NAME="lv-one-vm-$VM_ID-$DISK_ID"
VG_NAME="vg-one-$DS_SYS_ID"
DEV="/dev/${VG_NAME}/${LV_NAME}"

# vm doesn't contain info about persistent\notpersistent for CDROM
# take it from oneimage
OUTPUT=$(oneimage show -x ${IMAGE_ID})
TMP=${OUTPUT#*<PERSISTENT>}
PERSISTENT=${TMP%</PERSISTENT>*}



CREATE_LN=$(cat <<EOF
        set -e -o pipefail
        mkdir -p $DST_DIR
        rm -f $DST_PATH
        ln -s /dev/$ORIG_LV_NAME $DST_PATH
        #for HOTPLUG state (disk attach) keep the volume active
        if [ "$LCM_STATE" == '17' ]; then
            if [ $PERSISTENT == "1" ]; then
                $SUDO $LVCHANGE -ay $ORIG_LV_NAME
            fi
        fi
EOF
)

ssh_exec_and_log $DST_HOST "$CREATE_LN" "Error create symlink from $ORIG_LV_NAME to $DST_PATH"

exit 0
