#!/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.                                               #
# ---------------------------------------------------------------------------- #

###############################################################################
# This script is used retrieve the file size of a disk
###############################################################################

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')

ds_id        = drv_action["/DS_DRIVER_ACTION_DATA/DATASTORE/ID"]
ds_ref       = drv_action["/DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/VCENTER_DS_REF"]
ds_image_dir = drv_action["/DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/VCENTER_DS_IMAGE_DIR"] || "one"
img_id       = drv_action["/DS_DRIVER_ACTION_DATA/IMAGE/ID"]
adapter_type = drv_action["/DS_DRIVER_ACTION_DATA/IMAGE/TEMPLATE/VCENTER_ADAPTER_TYPE"] ||
                VCenterDriver::VIHelper.get_default("IMAGE/TEMPLATE/VCENTER_ADAPTER_TYPE")
disk_type    = drv_action["/DS_DRIVER_ACTION_DATA/IMAGE/TEMPLATE/VCENTER_DISK_TYPE"] ||
                VCenterDriver::VIHelper.get_default("IMAGE/TEMPLATE/VCENTER_DISK_TYPE")
size         = drv_action["/DS_DRIVER_ACTION_DATA/IMAGE/SIZE"]
fs_type      = drv_action["/DS_DRIVER_ACTION_DATA/IMAGE/FSTYPE"]

check_valid img_id, "img_id"
check_valid adapter_type, "adapter_type"
check_valid disk_type, "disk_type"
check_valid size, "size"
check_valid ds_ref, "ds_ref"

# TODO path in vCenter? choose a specific directory

img_name = "#{ds_image_dir}/#{img_id}/one-#{img_id}"

if fs_type == "save_as"
    puts img_name + ".vmdk"
    exit 0
end

begin
    vi_client = VCenterDriver::VIClient.new_from_datastore(ds_id)

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

    puts ds.create_virtual_disk(img_name, size, adapter_type, disk_type)

rescue Exception => e
    message = "Error creating virtual disk #{img_name}."\
              " Reason: \"#{e.message}\"\n#{e.backtrace}"
    STDERR.puts error_message(message)
    exit -1
ensure
    vi_client.close_connection if vi_client
end
