#!/usr/bin/env ruby

# ---------------------------------------------------------------------------- #
# Copyright 2002-2019, 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 !ONE_LOCATION
    RUBY_LIB_LOCATION ||= '/usr/lib/one/ruby'
    GEMS_LOCATION     ||= '/usr/share/one/gems'
else
    RUBY_LIB_LOCATION ||= ONE_LOCATION + '/lib/ruby'
    GEMS_LOCATION     ||= ONE_LOCATION + '/share/gems'
end

Gem.use_paths(GEMS_LOCATION) if File.directory?(GEMS_LOCATION)

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

require 'vcenter_driver'

vm_ref          = ARGV[0]
vc_cluster_name = ARGV[-1]

drv_action_enc = STDIN.read.delete("\n")
drv_action = OpenNebula::XMLElement.new
drv_action.initialize_xml(Base64.decode64(drv_action_enc),
                          'VMM_DRIVER_ACTION_DATA')
host_id = drv_action['VM/HISTORY_RECORDS/HISTORY/HID']

lcm_state = drv_action['/VMM_DRIVER_ACTION_DATA/VM/LCM_STATE']
check_valid(lcm_state, 'lcm_state')
lcm_state_str = OpenNebula::VirtualMachine::LCM_STATE[lcm_state.to_i]

if !%('SAVE_SUSPEND', 'SAVE_STOP', 'SAVE_MIGRATE').include?(lcm_state_str)
    STDERR.puts "Wrong lcm state #{lcm_state_str} when saving VM"
    exit(-1)
end

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

    vm = VCenterDriver::VirtualMachine.new_without_id(vi_client, vm_ref)

    vm.suspend
rescue StandardError => e
    message = "Save of VM #{vm_ref} on vCenter cluster "\
              "#{vc_cluster_name} failed due to "\
              "\"#{e.message}\"\n#{e.backtrace.join("\n")}"
    OpenNebula.log_error(message)
    if VCenterDriver::CONFIG[:debug_information]
        STDERR.puts "#{message} #{e.backtrace}"
    end
    exit(-1)
ensure
    vi_client.close_connection if vi_client
end
