#!/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_ref      = drv_action["/DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/VCENTER_DS_REF"]
ds_id       = drv_action["/DS_DRIVER_ACTION_DATA/DATASTORE/ID"]
img_src     = drv_action["/DS_DRIVER_ACTION_DATA/IMAGE/SOURCE"]
imported    = drv_action["/DS_DRIVER_ACTION_DATA/IMAGE/TEMPLATE/VCENTER_IMPORTED"]

check_valid ds_ref, "ds_ref"
check_valid img_src, "img_src"

CDROM = "1"

begin
    if imported.nil? || imported.empty?
        vi_client = VCenterDriver::VIClient.new_from_datastore(ds_id)

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

        img_dir = img_src.split('/')[0..-2].join('/')

        img_type    = drv_action["/DS_DRIVER_ACTION_DATA/IMAGE/TYPE"]

        # Check if file exists before trying to delete it
        ds_name  = ds['name']
        img_path = File.dirname img_src
        img_name = File.basename img_src

        search_params = ds.get_search_params(ds_name, img_path, img_name)

        # Perform search task and return results
        begin
            search_task = ds['browser'].SearchDatastoreSubFolders_Task(search_params)
            search_task.wait_for_completion

            if img_type != CDROM
                # delete the disk
                ds.delete_virtual_disk(img_src)
            else
                # delete the CDROM iso
                ds.delete_file(img_src)
            end

            vcenter_version = vi_client.vim.serviceContent.about.apiVersion
            ds.rm_directory(img_dir) if ds.dir_empty?(img_dir) && vcenter_version != "6.5"

        rescue Exception => e
            if !e.message.start_with?('FileNotFound')
                raise e.message # Ignore FileNotFound
            end
        end
    end
rescue Exception => e
    message = "Error deleting virtual disk #{img_src}."\
              " Reason: \"#{e.message}\"\n#{e.backtrace}"
    STDERR.puts error_message(message)
    exit -1
ensure
    vi_client.close_connection if vi_client
end
