#!/bin/bash

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

# cpds host:remote_system_ds/disk.i fe:SOURCE snapid vmid dsid
#   - 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
#   - snapid is the snapshot id. "-1" for none

SRC=$1
DST=$2
SNAP_ID=$3
VM_ID=$4
DS_ID=$5

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

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
source ${DRIVER_PATH}/../../datastore/libfs.sh
source ${DRIVER_PATH}/../../etc/vmm/kvm/kvmrc

#-------------------------------------------------------------------------------
# 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/LCM_STATE)

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

#-------------------------------------------------------------------------------
# Get Datastore information
#-------------------------------------------------------------------------------

unset i j XPATH_ELEMENTS

while IFS= read -r -d '' element; do
    XPATH_ELEMENTS[i++]="$element"
done < <(onedatastore show -x $DS_ID | $XPATH \
    /DATASTORE/TEMPLATE/POOL_NAME \
    /DATASTORE/TEMPLATE/BRIDGE_LIST)

POOL_NAME="${XPATH_ELEMENTS[j++]}"
BRIDGE_LIST="${XPATH_ELEMENTS[j++]}"

#-------------------------------------------------------------------------------
# Copy Image back to the datastore
#-------------------------------------------------------------------------------

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 ${VITASTOR_CONF}"
fi
if [ -n "$POOL_NAME" ]; then
    CLI="$CLI --pool ${POOL_NAME}"
fi

# Undeployed VM state, do not use front-end, choose host from bridge_list
if [ "$LCM_STATE" = '67' ] || [ "$LCM_STATE" = '68' ]; then
    if [ -n "$BRIDGE_LIST" ]; then
        SRC_HOST=`get_destination_host`
    fi
fi

if [ "$SNAP_ID" != "-1" ]; then
    SRC_IMAGE=$SRC_IMAGE@$SNAP_ID
fi

COPY_CMD=$(cat <<EOF
    $CLI dd iimg=$SRC_IMAGE oimg=$DST
EOF
)

ssh_exec_and_log "$SRC_HOST" "$COPY_CMD" "Error cloning $SRC_IMAGE to $DST in $SRC_HOST"