#!/usr/bin/env ruby

# ---------------------------------------------------------------------------- #
# Copyright 2002-2017, OpenNebula Project, OpenNebula Systems                  #
#                                                                              #
# 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.                                               #
# ---------------------------------------------------------------------------- #

ONE_LOCATION=ENV["ONE_LOCATION"] if !defined?(ONE_LOCATION)

if !ONE_LOCATION
    RUBY_LIB_LOCATION="/usr/lib/one/ruby" if !defined?(RUBY_LIB_LOCATION)
else
    RUBY_LIB_LOCATION=ONE_LOCATION+"/lib/ruby" if !defined?(RUBY_LIB_LOCATION)
end

$: << RUBY_LIB_LOCATION
$: << File.dirname(__FILE__)

require 'vcenter_driver'

drv_action_enc = ARGV[0]
id             = ARGV[1]

drv_action = OpenNebula::XMLElement.new
drv_action.initialize_xml(Base64.decode64(drv_action_enc), 'DS_DRIVER_ACTION_DATA')

target_ds_ref = drv_action["/DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/VCENTER_DS_REF"]
host_id       = drv_action["/DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/VCENTER_ONE_HOST_ID"]
ds_image_dir  = drv_action["/DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/VCENTER_DS_IMAGE_DIR"] || "one"
src_path      = drv_action["/DS_DRIVER_ACTION_DATA/IMAGE/PATH"]
src_img_id    = drv_action["/DS_DRIVER_ACTION_DATA/IMAGE/CLONING_ID"]

check_valid src_img_id, "cloning id"
check_valid host_id, "vcenter cluster"
check_valid src_path, "image path"
check_valid target_ds_ref, "target ds ref"

# Get source ds_ref
source_img = VCenterDriver::VIHelper.one_item(OpenNebula::Image, src_img_id)
source_ds_id = source_img['DATASTORE_ID']
source_ds = VCenterDriver::VIHelper.one_item(OpenNebula::Datastore, source_ds_id)
source_ds_ref = source_ds['TEMPLATE/VCENTER_DS_REF']

# Generate target path
target_path = "#{ds_image_dir}/#{id}/one-#{id}.vmdk"

begin
    vi_client = VCenterDriver::VIClient.new_from_host(host_id)


    ds = VCenterDriver::Datastore.new_from_ref(source_ds_ref, vi_client)

    target_ds_vc = VCenterDriver::Datastore.new_from_ref(target_ds_ref, vi_client)

    target_ds_name = target_ds_vc['name']

    puts ds.copy_virtual_disk(src_path, target_ds_vc, target_path)

rescue Exception => e
    message = "Error cloning img #{src_path} to #{target_ds_name}"\
              " Reason: \"#{e.message}\"\n#{e.backtrace}"
    STDERR.puts error_message(message)
    exit -1
ensure
    vi_client.close_connection if vi_client
end
