#!/bin/bash

#rbt
# Description in BREST-2936

if [ -z "${ONE_LOCATION}" ]; then
    LIB_LOCATION=/usr/lib/one
else
    LIB_LOCATION=$ONE_LOCATION/lib
fi

. $LIB_LOCATION/sh/scripts_common.sh

DRIVER_PATH=$(dirname $0)
source ${DRIVER_PATH}/../libfs.sh

# -------- Get cp and datastore arguments from OpenNebula core ------------

DRV_ACTION=$1
ID=$2

XPATH="${DRIVER_PATH}/../xpath.rb -b $DRV_ACTION"

unset i XPATH_ELEMENTS

while IFS= read -r -d '' element; do
    XPATH_ELEMENTS[i++]="$element"
done < <($XPATH     /DS_DRIVER_ACTION_DATA/DATASTORE/BASE_PATH \
                    /DS_DRIVER_ACTION_DATA/IMAGE/DATASTORE_ID \
                    /DS_DRIVER_ACTION_DATA/IMAGE/CLONING_ID)

unset i

BASE_PATH="${XPATH_ELEMENTS[i++]}"
DS_ID="${XPATH_ELEMENTS[i++]}"
SRC_ID="${XPATH_ELEMENTS[i++]}"

OUTPUT=$(oneimage show -x ${SRC_ID})
TMP=${OUTPUT#*<DATASTORE_ID>}
SRC_DS_ID=${TMP%</DATASTORE_ID>*}

set_up_datastore "$BASE_PATH" "$RESTRICTED_DIRS" "$SAFE_DIRS"

LV_NAME="lv-one-image-${ID}"
VG_NAME="vg-one-${DS_ID}"
SRC_VG_NAME="vg-one-${SRC_DS_ID}"
DEV="/dev/${VG_NAME}/${LV_NAME}"
SRC_DEV="/dev/${SRC_VG_NAME}/lv-one-image-${SRC_ID}"

# ------------ Copy the image to the repository -------------

# TODO the part for active VM

# get source volume size and format
SIZE=`$SUDO lvdisplay --units m -o lv_size --nosuffix --noheadings -C $SRC_DEV | sed -e 's/^[[:space:]]*//' 2>/dev/null`

# check the activity of the source volume
VOLUME_CHECK=$SUDO lvs ${SRC_VG_NAME}/lv-one-image-${SRC_ID} -o lv_active | awk 'NR > 1 {print $1}' 2>/dev/null
if [[ $VOLUME_CHECK != "active" ]]; then
$SUDO $LVCHANGE -ay "${SRC_VG_NAME}/lv-one-image-${SRC_ID}" >/dev/null 2>&1
fi
FORMAT=`$QEMU_IMG info ${SRC_DEV} | grep "^file format:" | awk '{print \$3}' || :`

# create the new volume
$SUDO $LVCREATE --wipesignatures n -L${SIZE}M -n $LV_NAME $VG_NAME >/dev/null 2>&1
# activate new volume
$SUDO $LVCHANGE -ay "${VG_NAME}/${LV_NAME}" >/dev/null 2>&1
# copy the content to new volume
exec_and_log "$SUDO $QEMU_IMG convert -O $FORMAT ${SRC_DEV} $DEV" "Error create ${DEV}"
$SUDO $LVCHANGE -an "${VG_NAME}/${LV_NAME}" >/dev/null 2>&1
$SUDO $LVCHANGE -an "${SRC_DEV}" >/dev/null 2>&1

echo "$DEV"
