#!/bin/bash

# -------------------------------------------------------------------------- #
# Copyright 2020, Axcient Inc.                                               #
#                                                                            #
# Licensed under the Apache License, Version 2.0 (the "License"); you may    #
# not use this file except in compliance with the License. You may obtain    #
# a copy of the License at                                                   #
#                                                                            #
# http://www.apache.org/licenses/LICENSE-2.0                                 #
#                                                                            #
# Unless required by applicable law or agreed to in writing, software        #
# distributed under the License is distributed on an "AS IS" BASIS,          #
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   #
# See the License for the specific language governing permissions and        #
# limitations under the License.                                             #
#--------------------------------------------------------------------------- #

###############################################################################
# This script is used to copy a VM image (SRC) to the image repository as DST
# Several SRC types are supported
###############################################################################
# -------- Set up the environment to source common tools & conf ------------
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
source ${DRIVER_PATH}/../../efs_utils

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

DRV_ACTION=$1
DST_ID=$2

TS=`date +"%Y-%m-%d %H:%M:%S"`
echo "${TS} [clone] - DRV_ACTION ${DRV_ACTION}" >>  /var/log/one/efs.log
echo "${TS} [clone] - DST_ID ${DST_ID}" >>  /var/log/one/efs.log

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/DATASTORE/TEMPLATE/BRIDGE_LIST \
                    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/POOL_NAME \
                    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/ISCSI_BASE_IQN \
                    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/ISCSI_LUN \
                    /DS_DRIVER_ACTION_DATA/IMAGE/PATH \
                    /DS_DRIVER_ACTION_DATA/IMAGE/CLONING_ID \
                    /DS_DRIVER_ACTION_DATA/IMAGE/SIZE)

unset i

BASE_PATH="${XPATH_ELEMENTS[i++]}"
BRIDGE_LIST="${XPATH_ELEMENTS[i++]}"
POOL_NAME="${XPATH_ELEMENTS[i++]:-$POOL_NAME}"
ISCSI_BASE_IQN="${XPATH_ELEMENTS[i++]}"
ISCSI_LUN="${XPATH_ELEMENTS[i++]}"
SRC="${XPATH_ELEMENTS[i++]}"
SRC_ID="${XPATH_ELEMENTS[i++]}"
SIZE="${XPATH_ELEMENTS[i++]}"

DST_HOST=`get_destination_host $ID`
#SRC_ID=$(echo $SRC|awk -F':' '{print $2}')
CHECK_SRC_VERSION="sudo zfs get -H -o value one:current ${POOL_NAME}/one/${SRC_ID}"
#sudo zfs clone ${POOL_NAME}/one/${SRC_ID}@\${SRC_VERSION} ${POOL_NAME}/one/${DST_ID}
#sudo zfs set one:current=\${SRC_VERSION} ${POOL_NAME}/one/${DST_ID}
#       sudo ctladd ${ISCSI_BASE_IQN}:${DST_ID} ${ISCSI_LUN} /dev/zvol/${POOL_NAME}/one/${DST_ID}
#       sleep 30
#       sudo service ctld reload

echo "${TS} [clone] - BASE_PATH ${BASE_PATH}" >>  /var/log/one/efs.log
echo "${TS} [clone] - BRIDGE_LIST ${BRIDGE_LIST}" >>  /var/log/one/efs.log
echo "${TS} [clone] - POOL_NAME ${POOL_NAME}" >>  /var/log/one/efs.log
echo "${TS} [clone] - SRC ${SRC}" >>  /var/log/one/efs.log
echo "${TS} [clone] - SIZE ${SIZE}" >>  /var/log/one/efs.log
echo "${TS} [clone] - DST_HOST ${DST_HOST}" >>  /var/log/one/efs.log

CLONE_CMD=$(cat <<EOF
    SRC_VERSION=\$($CHECK_SRC_VERSION 2>/dev/null)
    RC=\$?
    if [ \$RC -eq 0 ]
    then
        sudo zfs clone ${POOL_NAME}/one/${SRC_ID}@\${SRC_VERSION} ${POOL_NAME}/one/${DST_ID}
        sudo zfs set volmode=dev ${POOL_NAME}/one/${DST_ID}
        sudo zfs snapshot ${POOL_NAME}/one/${DST_ID}@\${SRC_VERSION}
        sudo zfs set one:current=\${SRC_VERSION} ${POOL_NAME}/one/${DST_ID}
        sudo ctladd ${ISCSI_BASE_IQN}:${DST_ID} ${ISCSI_LUN} /dev/zvol/${POOL_NAME}/one/${DST_ID}
        sleep 30
        sudo service ctld reload

    fi

    sleep 20
EOF
)
efs_log_var "CLONE_CMD"

ssh_exec_and_log $DST_HOST "${CLONE_CMD}" \
                 "Error cloning ${POOL_NAME}/one/${SRC_ID} to ${POOL_NAME}/one/${DST_ID} on $DST_HOST"
echo "${ISCSI_BASE_IQN}:${DST_ID}"
exit 0

error_message "Clone stub"
exit -1

if [ -z "$DST_HOST" ]; then
    error_message "Datastore template missing 'BRIDGE_LIST' attribute."
    exit -1
fi

if [ -n "$CEPH_CONF" ]; then
    RBD="$RBD --conf ${CEPH_CONF}"
fi

if [ -n "$CEPH_KEY" ]; then
    RBD="$RBD --keyfile ${CEPH_KEY}"
fi

if [ -n "$CEPH_USER" ]; then
    RBD="$RBD --id ${CEPH_USER}"
fi

if [ -n "$EC_POOL_NAME" ]; then
    RBD="$RBD --data-pool ${EC_POOL_NAME}"
fi

SAFE_DIRS=""

IMAGE_NAME="one-${ID}"
RBD_DST="${POOL_NAME}/${IMAGE_NAME}"

ssh_exec_and_log "$DST_HOST" "$RBD copy $SRC $RBD_DST" \
                 "Error cloning $SRC to $RBD_DST in $DST_HOST"

echo "$RBD_DST"
