#!/bin/bash

# Vitastor OpenNebula driver
# Copyright (c) Vitaliy Filippov, 2024+
# License: Apache-2.0 http://www.apache.org/licenses/LICENSE-2.0

# snap_create host:parent_image snap_id vmid ds_id

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

#--------------------------------------------------------------------------------

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

DRIVER_PATH=$(dirname $0)

source $TMCOMMON

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

SRC_HOST=`arg_host $SRC`
SRC_PATH=`arg_path $SRC`

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

DISK_ID=$(echo "$SRC_PATH" | $AWK -F. '{print $NF}')

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

unset i j XPATH_ELEMENTS

while IFS= read -r -d '' element; do
    XPATH_ELEMENTS[i++]="$element"
done < <(onevm show -x $VM_ID | $XPATH \
    /VM/TEMPLATE/DISK[DISK_ID=$DISK_ID]/SOURCE \
    /VM/TEMPLATE/DISK[DISK_ID=$DISK_ID]/CLONE \
    /VM/TEMPLATE/DISK[DISK_ID=$DISK_ID]/VITASTOR_CONF \
    /VM/TEMPLATE/DISK[DISK_ID=$DISK_ID]/TYPE )

SRC_IMAGE="${XPATH_ELEMENTS[j++]}"
CLONE="${XPATH_ELEMENTS[j++]}"
VITASTOR_CONF="${XPATH_ELEMENTS[j++]}"
TYPE="${XPATH_ELEMENTS[j++]}"

if [ "$CLONE" = "YES" ]; then
    SRC_IMAGE="${SRC_IMAGE}-${VM_ID}-${DISK_ID}"
fi

CLI=vitastor-cli
if [ -n "$VITASTOR_CONF" ]; then
    CLI="$CLI --config_path ${VITASTOR_CONF}"
fi

#-------------------------------------------------------------------------------
# Create snapshots
#-------------------------------------------------------------------------------

SNAP_CREATE_CMD=$(cat <<EOF
    $CLI snap-create "$SRC_IMAGE@$SNAP_ID"
EOF
)

ssh_exec_and_log "$SRC_HOST" "$SNAP_CREATE_CMD" "Error creating snapshot $SRC_IMAGE@$SNAP_ID"

exit 0