#!/usr/bin/python
# -*- coding: utf-8 -*-
#
# This module is also sponsored by E.T.A.I. (www.etai.fr)
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)

from __future__ import absolute_import, division, print_function
__metaclass__ = type


ANSIBLE_METADATA = {'metadata_version': '1.1',
                    'status': ['preview'],
                    'supported_by': 'community'}


DOCUMENTATION = r'''
---
module: vmware_guest
short_description: Manages virtual machines in vCenter
description:
- Create new virtual machines from templates or other virtual machines.
- Manage power state of virtual machine such as power on, power off, suspend, shutdown, reboot, restart etc.,.
- Modify, rename or remove a virtual machine.
version_added: '2.2'
author:
- James Tanner (@jctanner) <tanner.jc@gmail.com>
- Loic Blot (@nerzhul) <loic.blot@unix-experience.fr>
- Philippe Dellaert (@pdellaert) <philippe@dellaert.org>
- Abhijeet Kasurde (@akasurde) <akasurde@redhat.com>
notes:
- Tested on vSphere 5.5, 6.0 and 6.5
requirements:
- python >= 2.6
- PyVmomi
options:
  state:
    description:
    - Specify state of the virtual machine be in.
    - If C(state) is set to C(present) and VM exists, ensure the VM configuration conforms to task arguments.
    default: present
    choices: [ present, absent, poweredon, poweredoff, restarted, suspended, shutdownguest, rebootguest ]
  name:
    description:
    - Name of the VM to work with.
    - VM names in vCenter are not necessarily unique, which may be problematic, see C(name_match).
    - This parameter is case sensitive.
    required: yes
  name_match:
    description:
    - If multiple VMs matching the name, use the first or last found.
    default: 'first'
    choices: [ first, last ]
  uuid:
    description:
    - UUID of the instance to manage if known, this is VMware's unique identifier.
    - This is required if name is not supplied.
    - Please note that a supplied UUID will be ignored on VM creation, as VMware creates the UUID internally.
  template:
    description:
    - Template or existing VM used to create VM.
    - If this value is not set, VM is created without using a template.
    - If the VM exists already this setting will be ignored.
    - This parameter is case sensitive.
  is_template:
    description:
    - Flag the instance as a template.
    - This will mark VM instance as template.
    default: 'no'
    type: bool
    version_added: '2.3'
  folder:
    description:
    - Destination folder, absolute path to find an existing guest or create the new guest.
    - The folder should include the datacenter. ESX's datacenter is ha-datacenter.
    - This parameter is case sensitive.
    - 'Examples:'
    - '   folder: /ha-datacenter/vm'
    - '   folder: ha-datacenter/vm'
    - '   folder: /datacenter1/vm'
    - '   folder: datacenter1/vm'
    - '   folder: /datacenter1/vm/folder1'
    - '   folder: datacenter1/vm/folder1'
    - '   folder: /folder1/datacenter1/vm'
    - '   folder: folder1/datacenter1/vm'
    - '   folder: /folder1/datacenter1/vm/folder2'
  hardware:
    description:
    - Manage virtual machine's hardware attributes.
    - All parameters case sensitive.
    - 'Valid attributes are:'
    - ' - C(hotadd_cpu) (boolean): Allow virtual CPUs to be added while the VM is running.'
    - ' - C(hotremove_cpu) (boolean): Allow virtual CPUs to be removed while the VM is running. version_added: 2.5'
    - ' - C(hotadd_memory) (boolean): Allow memory to be added while the VM is running.'
    - ' - C(memory_mb) (integer): Amount of memory in MB.'
    - ' - C(nested_virt) (bool): Enable nested virtualization. version_added: 2.5'
    - ' - C(num_cpus) (integer): Number of CPUs.'
    - ' - C(num_cpu_cores_per_socket) (integer): Number of Cores Per Socket. Value should be multiple of C(num_cpus).'
    - ' - C(scsi) (string): Valid values are C(buslogic), C(lsilogic), C(lsilogicsas) and C(paravirtual) (default).'
    - ' - C(memory_reservation) (integer): Amount of memory in MB to set resource limits for memory. version_added: 2.5'
    - " - C(memory_reservation_lock) (boolean): If set true, memory resource reservation for VM
          will always be equal to the VM's memory size. version_added: 2.5"
    - ' - C(max_connections) (integer): Maximum number of active remote display connections for the virtual machines. version_added: 2.5.'
    - ' - C(mem_limit) (integer): The memory utilization of a virtual machine will not exceed this limit. Unit is MB.
          version_added: 2.5'
    - ' - C(mem_reservation) (integer): The amount of memory resource that is guaranteed available to the virtual
          machine. Unit is MB. version_added: 2.5'
    - ' - C(cpu_limit) (integer): The CPU utilization of a virtual machine will not exceed this limit. Unit is MHz.
          version_added: 2.5'
    - ' - C(cpu_reservation) (integer): The amount of CPU resource that is guaranteed available to the virtual machine.
          Unit is MHz. version_added: 2.5'

  guest_id:
    description:
    - Set the guest ID.
    - This parameter is case sensitive.
    - 'Examples:'
    - "  VM with RHEL7 64 bit, will be 'rhel7_64Guest'"
    - "  VM with CensOS 64 bit, will be 'centos64Guest'"
    - "  VM with Ubuntu 64 bit, will be 'ubuntu64Guest'"
    - This field is required when creating a VM.
    - >
         Valid values are referenced here:
         U(https://www.vmware.com/support/developer/converter-sdk/conv55_apireference/vim.vm.GuestOsDescriptor.GuestOsIdentifier.html)
    version_added: '2.3'
  disk:
    description:
    - A list of disks to add.
    - This parameter is case sensitive.
    - Resizing disks is not supported.
    - Removing existing disks of virtual machine is not supported.
    - 'Valid attributes are:'
    - ' - C(size_[tb,gb,mb,kb]) (integer): Disk storage size in specified unit.'
    - ' - C(type) (string): Valid values are:'
    - '     - C(thin) thin disk'
    - '     - C(eagerzeroedthick) eagerzeroedthick disk, added in version 2.5'
    - '     Default: C(None) thick disk, no eagerzero.'
    - ' - C(datastore) (string): Datastore to use for the disk. If C(autoselect_datastore) is enabled, filter datastore selection.'
    - ' - C(autoselect_datastore) (bool): select the less used datastore. Specify only if C(datastore) is not specified.'
  cdrom:
    description:
    - A CD-ROM configuration for the VM.
    - 'Valid attributes are:'
    - ' - C(type) (string): The type of CD-ROM, valid options are C(none), C(client) or C(iso). With C(none) the CD-ROM will be disconnected but present.'
    - ' - C(iso_path) (string): The datastore path to the ISO file to use, in the form of C([datastore1] path/to/file.iso). Required if type is set C(iso).'
    version_added: '2.5'
  resource_pool:
    description:
    - Affect machine to the given resource pool.
    - This parameter is case sensitive.
    - Resource pool should be child of the selected host parent.
    version_added: '2.3'
  wait_for_ip_address:
    description:
    - Wait until vCenter detects an IP address for the VM.
    - This requires vmware-tools (vmtoolsd) to properly work after creation.
    - "vmware-tools needs to be installed on given virtual machine in order to work with this parameter."
    default: 'no'
    type: bool
  snapshot_src:
    description:
    - Name of the existing snapshot to use to create a clone of a VM.
    - This parameter is case sensitive.
    version_added: '2.4'
  linked_clone:
    description:
    - Whether to create a Linked Clone from the snapshot specified.
    default: 'no'
    type: bool
    version_added: '2.4'
  force:
    description:
    - Ignore warnings and complete the actions.
    - This parameter is useful while removing virtual machine which is powered on state.
    default: 'no'
    type: bool
  datacenter:
    description:
    - Destination datacenter for the deploy operation.
    - This parameter is case sensitive.
    default: ha-datacenter
  cluster:
    description:
    - The cluster name where the virtual machine will run.
    - This parameter is case sensitive.
    version_added: '2.3'
  esxi_hostname:
    description:
    - The ESXi hostname where the virtual machine will run.
    - This parameter is case sensitive.
  annotation:
    description:
    - A note or annotation to include in the virtual machine.
    version_added: '2.3'
  customvalues:
    description:
    - Define a list of custom values to set on virtual machine.
    - A custom value object takes two fields C(key) and C(value).
    - Incorrect key and values will be ignored.
    version_added: '2.3'
  networks:
    description:
    - A list of networks (in the order of the NICs).
    - All parameters and VMware object names are case sensetive.
    - 'One of the below parameters is required per entry:'
    - ' - C(name) (string): Name of the portgroup for this interface.'
    - ' - C(vlan) (integer): VLAN number for this interface.'
    - 'Optional parameters per entry (used for virtual hardware):'
    - ' - C(device_type) (string): Virtual network device (one of C(e1000), C(e1000e), C(pcnet32), C(vmxnet2), C(vmxnet3) (default), C(sriov)).'
    - ' - C(mac) (string): Customize mac address.'
    - 'Optional parameters per entry (used for OS customization):'
    - ' - C(type) (string): Type of IP assignment (either C(dhcp) or C(static)).'
    - ' - C(ip) (string): Static IP address (implies C(type: static)).'
    - ' - C(netmask) (string): Static netmask required for C(ip).'
    - ' - C(gateway) (string): Static gateway.'
    - ' - C(dns_servers) (string): DNS servers for this network interface (Windows).'
    - ' - C(domain) (string): Domain name for this network interface (Windows).'
    - ' - C(wake_on_lan) (bool): Indicates if wake-on-LAN is enabled on this virtual network adapter. version_added: 2.5'
    - ' - C(start_connected) (bool): Indicates that virtual network adapter starts with associated virtual machine powers on. version_added: 2.5'
    - ' - C(allow_guest_control) (bool): Enables guest control over whether the connectable device is connected. version_added: 2.5'
    version_added: '2.3'
  customization:
    description:
    - Parameters for OS customization when cloning from template.
    - All parameters and VMware object names are case sensetive.
    - 'Common parameters (Linux/Windows):'
    - ' - C(dns_servers) (list): List of DNS servers to configure.'
    - ' - C(dns_suffix) (list): List of domain suffixes, aka DNS search path (default: C(domain) parameter).'
    - ' - C(domain) (string): DNS domain name to use.'
    - ' - C(hostname) (string): Computer hostname (default: shorted C(name) parameter).'
    - 'Parameters related to Windows customization:'
    - ' - C(autologon) (bool): Auto logon after VM customization (default: False).'
    - ' - C(autologoncount) (int): Number of autologon after reboot (default: 1).'
    - ' - C(domainadmin) (string): User used to join in AD domain (mandatory with C(joindomain)).'
    - ' - C(domainadminpassword) (string): Password used to join in AD domain (mandatory with C(joindomain)).'
    - ' - C(fullname) (string): Server owner name (default: Administrator).'
    - ' - C(joindomain) (string): AD domain to join (Not compatible with C(joinworkgroup)).'
    - ' - C(joinworkgroup) (string): Workgroup to join (Not compatible with C(joindomain), default: WORKGROUP).'
    - ' - C(orgname) (string): Organisation name (default: ACME).'
    - ' - C(password) (string): Local administrator password.'
    - ' - C(productid) (string): Product ID.'
    - ' - C(runonce) (list): List of commands to run at first user logon.'
    - ' - C(timezone) (int): Timezone (See U(https://msdn.microsoft.com/en-us/library/ms912391.aspx)).'
    version_added: '2.3'
extends_documentation_fragment: vmware.documentation
'''

EXAMPLES = r'''
- name: Create a VM from a template
  vmware_guest:
    hostname: 192.0.2.44
    username: administrator@vsphere.local
    password: vmware
    validate_certs: no
    folder: /testvms
    name: testvm_2
    state: poweredon
    template: template_el7
    disk:
    - size_gb: 10
      type: thin
      datastore: g73_datastore
    hardware:
      memory_mb: 512
      num_cpus: 6
      num_cpu_cores_per_socket: 3
      scsi: paravirtual
      memory_reservation: 512
      memory_reservation_lock: True
      mem_limit: 8096
      mem_reservation: 4096
      cpu_limit: 8096
      cpu_reservation: 4096
      max_connections: 5
      hotadd_cpu: True
      hotremove_cpu: True
      hotadd_memory: False
    cdrom:
      type: iso
      iso_path: "[datastore1] livecd.iso"
    networks:
    - name: VM Network
      mac: aa:bb:dd:aa:00:14
    wait_for_ip_address: yes
  delegate_to: localhost
  register: deploy

- name: Clone a VM from Template and customize
  vmware_guest:
    hostname: 192.168.1.209
    username: administrator@vsphere.local
    password: vmware
    validate_certs: no
    datacenter: datacenter1
    cluster: cluster
    name: testvm-2
    template: template_windows
    networks:
    - name: VM Network
      ip: 192.168.1.100
      netmask: 255.255.255.0
      gateway: 192.168.1.1
      mac: aa:bb:dd:aa:00:14
      domain: my_domain
      dns_servers:
      - 192.168.1.1
      - 192.168.1.2
    - vlan: 1234
      type: dhcp
    customization:
      autologon: yes
      dns_servers:
      - 192.168.1.1
      - 192.168.1.2
      domain: my_domain
      password: new_vm_password
      runonce:
      - powershell.exe -ExecutionPolicy Unrestricted -File C:\Windows\Temp\ConfigureRemotingForAnsible.ps1 -ForceNewSSLCert -EnableCredSSP
  delegate_to: localhost

- name: Create a VM template
  vmware_guest:
    hostname: 192.0.2.88
    username: administrator@vsphere.local
    password: vmware
    validate_certs: no
    datacenter: datacenter1
    cluster: vmware_cluster_esx
    resource_pool: highperformance_pool
    folder: /testvms
    name: testvm_6
    is_template: yes
    guest_id: debian6_64Guest
    disk:
    - size_gb: 10
      type: thin
      datastore: g73_datastore
    hardware:
      memory_mb: 512
      num_cpus: 1
      scsi: lsilogic
  delegate_to: localhost
  register: deploy

- name: Rename a VM (requires the VM's uuid)
  vmware_guest:
    hostname: 192.168.1.209
    username: administrator@vsphere.local
    password: vmware
    uuid: 421e4592-c069-924d-ce20-7e7533fab926
    name: new_name
    state: present
  delegate_to: localhost

- name: Remove a VM by uuid
  vmware_guest:
    hostname: 192.168.1.209
    username: administrator@vsphere.local
    password: vmware
    uuid: 421e4592-c069-924d-ce20-7e7533fab926
    state: absent
  delegate_to: localhost
'''

RETURN = r'''
instance:
    description: metadata about the new virtual machine
    returned: always
    type: dict
    sample: None
'''

import re
import time

HAS_PYVMOMI = False
try:
    import pyVmomi
    from pyVmomi import vim, vmodl

    HAS_PYVMOMI = True
except ImportError:
    pass

from ansible.module_utils.basic import AnsibleModule
from ansible.module_utils._text import to_text, to_native
from ansible.module_utils.vmware import (find_obj, gather_vm_facts, get_all_objs,
                                         compile_folder_path_for_object, serialize_spec,
                                         vmware_argument_spec, set_vm_power_state, PyVmomi)


class PyVmomiDeviceHelper(object):
    """ This class is a helper to create easily VMWare Objects for PyVmomiHelper """

    def __init__(self, module):
        self.module = module
        self.next_disk_unit_number = 0

    @staticmethod
    def create_scsi_controller(scsi_type):
        scsi_ctl = vim.vm.device.VirtualDeviceSpec()
        scsi_ctl.operation = vim.vm.device.VirtualDeviceSpec.Operation.add
        if scsi_type == 'lsilogic':
            scsi_ctl.device = vim.vm.device.VirtualLsiLogicController()
        elif scsi_type == 'paravirtual':
            scsi_ctl.device = vim.vm.device.ParaVirtualSCSIController()
        elif scsi_type == 'buslogic':
            scsi_ctl.device = vim.vm.device.VirtualBusLogicController()
        elif scsi_type == 'lsilogicsas':
            scsi_ctl.device = vim.vm.device.VirtualLsiLogicSASController()

        scsi_ctl.device.deviceInfo = vim.Description()
        scsi_ctl.device.slotInfo = vim.vm.device.VirtualDevice.PciBusSlotInfo()
        scsi_ctl.device.slotInfo.pciSlotNumber = 16
        scsi_ctl.device.controllerKey = 100
        scsi_ctl.device.unitNumber = 3
        scsi_ctl.device.busNumber = 0
        scsi_ctl.device.hotAddRemove = True
        scsi_ctl.device.sharedBus = 'noSharing'
        scsi_ctl.device.scsiCtlrUnitNumber = 7

        return scsi_ctl

    @staticmethod
    def is_scsi_controller(device):
        return isinstance(device, vim.vm.device.VirtualLsiLogicController) or \
            isinstance(device, vim.vm.device.ParaVirtualSCSIController) or \
            isinstance(device, vim.vm.device.VirtualBusLogicController) or \
            isinstance(device, vim.vm.device.VirtualLsiLogicSASController)

    @staticmethod
    def create_ide_controller():
        ide_ctl = vim.vm.device.VirtualDeviceSpec()
        ide_ctl.operation = vim.vm.device.VirtualDeviceSpec.Operation.add
        ide_ctl.device = vim.vm.device.VirtualIDEController()
        ide_ctl.device.deviceInfo = vim.Description()
        ide_ctl.device.busNumber = 0

        return ide_ctl

    @staticmethod
    def create_cdrom(ide_ctl, cdrom_type, iso_path=None):
        cdrom_spec = vim.vm.device.VirtualDeviceSpec()
        cdrom_spec.operation = vim.vm.device.VirtualDeviceSpec.Operation.add
        cdrom_spec.device = vim.vm.device.VirtualCdrom()
        cdrom_spec.device.controllerKey = ide_ctl.device.key
        cdrom_spec.device.key = -1
        cdrom_spec.device.connectable = vim.vm.device.VirtualDevice.ConnectInfo()
        cdrom_spec.device.connectable.allowGuestControl = True
        cdrom_spec.device.connectable.startConnected = (cdrom_type != "none")
        if cdrom_type in ["none", "client"]:
            cdrom_spec.device.backing = vim.vm.device.VirtualCdrom.RemotePassthroughBackingInfo()
        elif cdrom_type == "iso":
            cdrom_spec.device.backing = vim.vm.device.VirtualCdrom.IsoBackingInfo(fileName=iso_path)

        return cdrom_spec

    @staticmethod
    def is_equal_cdrom(vm_obj, cdrom_device, cdrom_type, iso_path):
        if cdrom_type == "none":
            return (isinstance(cdrom_device.backing, vim.vm.device.VirtualCdrom.RemotePassthroughBackingInfo) and
                    cdrom_device.connectable.allowGuestControl and
                    not cdrom_device.connectable.startConnected and
                    (vm_obj.runtime.powerState != vim.VirtualMachinePowerState.poweredOn or not cdrom_device.connectable.connected))
        elif cdrom_type == "client":
            return (isinstance(cdrom_device.backing, vim.vm.device.VirtualCdrom.RemotePassthroughBackingInfo) and
                    cdrom_device.connectable.allowGuestControl and
                    cdrom_device.connectable.startConnected and
                    (vm_obj.runtime.powerState != vim.VirtualMachinePowerState.poweredOn or cdrom_device.connectable.connected))
        elif cdrom_type == "iso":
            return (isinstance(cdrom_device.backing, vim.vm.device.VirtualCdrom.IsoBackingInfo) and
                    cdrom_device.backing.fileName == iso_path and
                    cdrom_device.connectable.allowGuestControl and
                    cdrom_device.connectable.startConnected and
                    (vm_obj.runtime.powerState != vim.VirtualMachinePowerState.poweredOn or cdrom_device.connectable.connected))

    def create_scsi_disk(self, scsi_ctl, disk_index=None):
        diskspec = vim.vm.device.VirtualDeviceSpec()
        diskspec.operation = vim.vm.device.VirtualDeviceSpec.Operation.add
        diskspec.fileOperation = vim.vm.device.VirtualDeviceSpec.FileOperation.create
        diskspec.device = vim.vm.device.VirtualDisk()
        diskspec.device.backing = vim.vm.device.VirtualDisk.FlatVer2BackingInfo()
        diskspec.device.backing.diskMode = 'persistent'
        diskspec.device.controllerKey = scsi_ctl.device.key

        if self.next_disk_unit_number == 7:
            raise AssertionError()
        if disk_index == 7:
            raise AssertionError()
        """
        Configure disk unit number.
        """
        if disk_index is not None:
            diskspec.device.unitNumber = disk_index
            self.next_disk_unit_number = disk_index + 1
        else:
            diskspec.device.unitNumber = self.next_disk_unit_number
            self.next_disk_unit_number += 1

        # unit number 7 is reserved to SCSI controller, increase next index
        if self.next_disk_unit_number == 7:
            self.next_disk_unit_number += 1

        return diskspec

    def create_nic(self, device_type, device_label, device_infos):
        nic = vim.vm.device.VirtualDeviceSpec()
        if device_type == 'pcnet32':
            nic.device = vim.vm.device.VirtualPCNet32()
        elif device_type == 'vmxnet2':
            nic.device = vim.vm.device.VirtualVmxnet2()
        elif device_type == 'vmxnet3':
            nic.device = vim.vm.device.VirtualVmxnet3()
        elif device_type == 'e1000':
            nic.device = vim.vm.device.VirtualE1000()
        elif device_type == 'e1000e':
            nic.device = vim.vm.device.VirtualE1000e()
        elif device_type == 'sriov':
            nic.device = vim.vm.device.VirtualSriovEthernetCard()
        else:
            self.module.fail_json(msg='Invalid device_type "%s" for network "%s"' % (device_type, device_infos['name']))

        nic.device.wakeOnLanEnabled = bool(device_infos.get('wake_on_lan', True))
        nic.device.deviceInfo = vim.Description()
        nic.device.deviceInfo.label = device_label
        nic.device.deviceInfo.summary = device_infos['name']
        nic.device.connectable = vim.vm.device.VirtualDevice.ConnectInfo()
        nic.device.connectable.startConnected = bool(device_infos.get('start_connected', True))
        nic.device.connectable.allowGuestControl = bool(device_infos.get('allow_guest_control', True))
        nic.device.connectable.connected = True
        if 'mac' in device_infos and self.is_valid_mac_addr(device_infos['mac']):
            nic.device.addressType = 'manual'
            nic.device.macAddress = device_infos['mac']
        else:
            nic.device.addressType = 'generated'

        return nic

    @staticmethod
    def is_valid_mac_addr(mac_addr):
        """
        Function to validate MAC address for given string
        Args:
            mac_addr: string to validate as MAC address

        Returns: (Boolean) True if string is valid MAC address, otherwise False
        """
        ret = False
        mac_addr_regex = re.compile('[0-9a-f]{2}([-:])[0-9a-f]{2}(\\1[0-9a-f]{2}){4}$')
        if mac_addr_regex.match(mac_addr):
            ret = True
        return ret


class PyVmomiCache(object):
    """ This class caches references to objects which are requested multiples times but not modified """

    def __init__(self, content, dc_name=None):
        self.content = content
        self.dc_name = dc_name
        self.networks = {}
        self.clusters = {}
        self.esx_hosts = {}
        self.parent_datacenters = {}

    def find_obj(self, content, types, name, confine_to_datacenter=True):
        """ Wrapper around find_obj to set datacenter context """
        result = find_obj(content, types, name)
        if result and confine_to_datacenter:
            if self.get_parent_datacenter(result).name != self.dc_name:
                result = None
                objects = self.get_all_objs(content, types, confine_to_datacenter=True)
                for obj in objects:
                    if name is None or obj.name == name:
                        return obj
        return result

    def get_all_objs(self, content, types, confine_to_datacenter=True):
        """ Wrapper around get_all_objs to set datacenter context """
        objects = get_all_objs(content, types)
        if confine_to_datacenter:
            if hasattr(objects, 'items'):
                # resource pools come back as a dictionary
                # make a copy
                tmpobjs = objects.copy()
                for k, v in objects.items():
                    parent_dc = self.get_parent_datacenter(k)
                    if parent_dc.name != self.dc_name:
                        tmpobjs.pop(k, None)
                objects = tmpobjs
            else:
                # everything else should be a list
                objects = [x for x in objects if self.get_parent_datacenter(x).name == self.dc_name]

        return objects

    def get_network(self, network):
        if network not in self.networks:
            self.networks[network] = self.find_obj(self.content, [vim.Network], network)

        return self.networks[network]

    def get_cluster(self, cluster):
        if cluster not in self.clusters:
            self.clusters[cluster] = self.find_obj(self.content, [vim.ClusterComputeResource], cluster)

        return self.clusters[cluster]

    def get_esx_host(self, host):
        if host not in self.esx_hosts:
            self.esx_hosts[host] = self.find_obj(self.content, [vim.HostSystem], host)

        return self.esx_hosts[host]

    def get_parent_datacenter(self, obj):
        """ Walk the parent tree to find the objects datacenter """
        if isinstance(obj, vim.Datacenter):
            return obj
        if obj in self.parent_datacenters:
            return self.parent_datacenters[obj]
        datacenter = None
        while True:
            if not hasattr(obj, 'parent'):
                break
            obj = obj.parent
            if isinstance(obj, vim.Datacenter):
                datacenter = obj
                break
        self.parent_datacenters[obj] = datacenter
        return datacenter


class PyVmomiHelper(PyVmomi):
    def __init__(self, module):
        super(PyVmomiHelper, self).__init__(module)
        self.device_helper = PyVmomiDeviceHelper(self.module)
        self.configspec = None
        self.change_detected = False
        self.customspec = None
        self.cache = PyVmomiCache(self.content, dc_name=self.params['datacenter'])

    def gather_facts(self, vm):
        return gather_vm_facts(self.content, vm)

    def remove_vm(self, vm):
        # https://www.vmware.com/support/developer/converter-sdk/conv60_apireference/vim.ManagedEntity.html#destroy
        if vm.summary.runtime.powerState.lower() == 'poweredon':
            self.module.fail_json(msg="Virtual machine %s found in 'powered on' state, "
                                      "please use 'force' parameter to remove or poweroff VM "
                                      "and try removing VM again." % vm.name)
        task = vm.Destroy()
        self.wait_for_task(task)

        if task.info.state == 'error':
            return {'changed': False, 'failed': True, 'msg': task.info.error.msg}
        else:
            return {'changed': True, 'failed': False}

    def configure_guestid(self, vm_obj, vm_creation=False):
        # guest_id is not required when using templates
        if self.params['template'] and not self.params['guest_id']:
            return

        # guest_id is only mandatory on VM creation
        if vm_creation and self.params['guest_id'] is None:
            self.module.fail_json(msg="guest_id attribute is mandatory for VM creation")

        if self.params['guest_id'] and (vm_obj is None or self.params['guest_id'] != vm_obj.summary.config.guestId):
            self.change_detected = True
            self.configspec.guestId = self.params['guest_id']

    def configure_resource_alloc_info(self, vm_obj):
        """
        Function to configure resource allocation information about virtual machine
        :param vm_obj: VM object in case of reconfigure, None in case of deploy
        :return: None
        """
        self.configspec.memoryAllocation = vim.ResourceAllocationInfo()
        self.configspec.cpuAllocation = vim.ResourceAllocationInfo()

        if 'hardware' in self.params:
            if 'mem_limit' in self.params['hardware']:
                mem_limit = None
                try:
                    mem_limit = int(self.params['hardware'].get('mem_limit'))
                except ValueError as e:
                    self.module.fail_json(msg="hardware.mem_limit attribute should be an integer value.")
                self.configspec.memoryAllocation.limit = mem_limit
                if vm_obj is None or self.configspec.memoryAllocation.limit != vm_obj.config.memoryAllocation.limit:
                    self.change_detected = True

            if 'mem_reservation' in self.params['hardware']:
                mem_reservation = None
                try:
                    mem_reservation = int(self.params['hardware'].get('mem_reservation'))
                except ValueError as e:
                    self.module.fail_json(msg="hardware.mem_reservation should be an integer value.")

                self.configspec.memoryAllocation.reservation = mem_reservation
                if vm_obj is None or \
                        self.configspec.memoryAllocation.reservation != vm_obj.config.memoryAllocation.reservation:
                    self.change_detected = True

            if 'cpu_limit' in self.params['hardware']:
                cpu_limit = None
                try:
                    cpu_limit = int(self.params['hardware'].get('cpu_limit'))
                except ValueError as e:
                    self.module.fail_json(msg="hardware.cpu_limit attribute should be an integer value.")
                self.configspec.cpuAllocation.limit = cpu_limit
                if vm_obj is None or self.configspec.cpuAllocation.limit != vm_obj.config.cpuAllocation.limit:
                    self.change_detected = True

            if 'cpu_reservation' in self.params['hardware']:
                cpu_reservation = None
                try:
                    cpu_reservation = int(self.params['hardware'].get('cpu_reservation'))
                except ValueError as e:
                    self.module.fail_json(msg="hardware.cpu_reservation should be an integer value.")
                self.configspec.cpuAllocation.reservation = cpu_reservation
                if vm_obj is None or \
                        self.configspec.cpuAllocation.reservation != vm_obj.config.cpuAllocation.reservation:
                    self.change_detected = True

    def configure_cpu_and_memory(self, vm_obj, vm_creation=False):
        # set cpu/memory/etc
        if 'hardware' in self.params:
            if 'num_cpus' in self.params['hardware']:
                try:
                    num_cpus = int(self.params['hardware']['num_cpus'])
                except ValueError as e:
                    self.module.fail_json(msg="hardware.num_cpus attribute should be an integer value.")

                if 'num_cpu_cores_per_socket' in self.params['hardware']:
                    try:
                        num_cpu_cores_per_socket = int(self.params['hardware']['num_cpu_cores_per_socket'])
                    except ValueError as e:
                        self.module.fail_json(msg="hardware.num_cpu_cores_per_socket attribute "
                                                  "should be an integer value.")
                    if num_cpus % num_cpu_cores_per_socket != 0:
                        self.module.fail_json(msg="hardware.num_cpus attribute should be a multiple "
                                                  "of hardware.num_cpu_cores_per_socket")

                    self.configspec.numCoresPerSocket = num_cpu_cores_per_socket
                    if vm_obj is None or self.configspec.numCoresPerSocket != vm_obj.config.hardware.numCoresPerSocket:
                        self.change_detected = True

                self.configspec.numCPUs = num_cpus
                if vm_obj is None or self.configspec.numCPUs != vm_obj.config.hardware.numCPU:
                    self.change_detected = True
            # num_cpu is mandatory for VM creation
            elif vm_creation and not self.params['template']:
                self.module.fail_json(msg="hardware.num_cpus attribute is mandatory for VM creation")

            if 'memory_mb' in self.params['hardware']:
                self.configspec.memoryMB = int(self.params['hardware']['memory_mb'])
                if vm_obj is None or self.configspec.memoryMB != vm_obj.config.hardware.memoryMB:
                    self.change_detected = True
            # memory_mb is mandatory for VM creation
            elif vm_creation and not self.params['template']:
                self.module.fail_json(msg="hardware.memory_mb attribute is mandatory for VM creation")

            if 'hotadd_memory' in self.params['hardware']:
                self.configspec.memoryHotAddEnabled = bool(self.params['hardware']['hotadd_memory'])
                if vm_obj is None or self.configspec.memoryHotAddEnabled != vm_obj.config.memoryHotAddEnabled:
                    self.change_detected = True

            if 'hotadd_cpu' in self.params['hardware']:
                self.configspec.cpuHotAddEnabled = bool(self.params['hardware']['hotadd_cpu'])
                if vm_obj is None or self.configspec.cpuHotAddEnabled != vm_obj.config.cpuHotAddEnabled:
                    self.change_detected = True

            if 'hotremove_cpu' in self.params['hardware']:
                self.configspec.cpuHotRemoveEnabled = bool(self.params['hardware']['hotremove_cpu'])
                if vm_obj is None or self.configspec.cpuHotRemoveEnabled != vm_obj.config.cpuHotRemoveEnabled:
                    self.change_detected = True

            if 'memory_reservation' in self.params['hardware']:
                memory_reservation_mb = 0
                try:
                    memory_reservation_mb = int(self.params['hardware']['memory_reservation'])
                except ValueError as e:
                    self.module.fail_json(msg="Failed to set memory_reservation value."
                                              "Valid value for memory_reservation value in MB (integer): %s" % e)

                mem_alloc = vim.ResourceAllocationInfo()
                mem_alloc.reservation = memory_reservation_mb
                self.configspec.memoryAllocation = mem_alloc
                if vm_obj is None or self.configspec.memoryAllocation.reservation != vm_obj.config.memoryAllocation.reservation:
                    self.change_detected = True

            if 'memory_reservation_lock' in self.params['hardware']:
                self.configspec.memoryReservationLockedToMax = bool(self.params['hardware']['memory_reservation_lock'])
                if vm_obj is None or self.configspec.memoryReservationLockedToMax != vm_obj.config.memoryReservationLockedToMax:
                    self.change_detected = True

    def configure_cdrom(self, vm_obj):
        # Configure the VM CD-ROM
        if "cdrom" in self.params and self.params["cdrom"]:
            if "type" not in self.params["cdrom"] or self.params["cdrom"]["type"] not in ["none", "client", "iso"]:
                self.module.fail_json(msg="cdrom.type is mandatory")
            if self.params["cdrom"]["type"] == "iso" and ("iso_path" not in self.params["cdrom"] or not self.params["cdrom"]["iso_path"]):
                self.module.fail_json(msg="cdrom.iso_path is mandatory in case cdrom.type is iso")

            if vm_obj and vm_obj.config.template:
                # Changing CD-ROM settings on a template is not supported
                return

            cdrom_spec = None
            cdrom_device = self.get_vm_cdrom_device(vm=vm_obj)
            iso_path = self.params["cdrom"]["iso_path"] if "iso_path" in self.params["cdrom"] else None
            if cdrom_device is None:
                # Creating new CD-ROM
                ide_device = self.get_vm_ide_device(vm=vm_obj)
                if ide_device is None:
                    # Creating new IDE device
                    ide_device = self.device_helper.create_ide_controller()
                    self.change_detected = True
                    self.configspec.deviceChange.append(ide_device)
                elif len(ide_device.device) > 3:
                    self.module.fail_json(msg="hardware.cdrom specified for a VM or template which already has 4 IDE devices of which none are a cdrom")

                cdrom_spec = self.device_helper.create_cdrom(ide_ctl=ide_device, cdrom_type=self.params["cdrom"]["type"], iso_path=iso_path)
                if vm_obj and vm_obj.runtime.powerState == vim.VirtualMachinePowerState.poweredOn:
                    cdrom_spec.device.connectable.connected = (self.params["cdrom"]["type"] != "none")

            elif not self.device_helper.is_equal_cdrom(vm_obj=vm_obj, cdrom_device=cdrom_device, cdrom_type=self.params["cdrom"]["type"], iso_path=iso_path):
                # Updating an existing CD-ROM
                if self.params["cdrom"]["type"] in ["client", "none"]:
                    cdrom_device.backing = vim.vm.device.VirtualCdrom.RemotePassthroughBackingInfo()
                elif self.params["cdrom"]["type"] == "iso":
                    cdrom_device.backing = vim.vm.device.VirtualCdrom.IsoBackingInfo(fileName=iso_path)
                cdrom_device.connectable = vim.vm.device.VirtualDevice.ConnectInfo()
                cdrom_device.connectable.allowGuestControl = True
                cdrom_device.connectable.startConnected = (self.params["cdrom"]["type"] != "none")
                if vm_obj and vm_obj.runtime.powerState == vim.VirtualMachinePowerState.poweredOn:
                    cdrom_device.connectable.connected = (self.params["cdrom"]["type"] != "none")

                cdrom_spec = vim.vm.device.VirtualDeviceSpec()
                cdrom_spec.operation = vim.vm.device.VirtualDeviceSpec.Operation.edit
                cdrom_spec.device = cdrom_device

            if cdrom_spec:
                self.change_detected = True
                self.configspec.deviceChange.append(cdrom_spec)

    def configure_hardware_params(self, vm_obj):
        """
        Function to configure hardware related configuration of virtual machine
        Args:
            vm_obj: virtual machine object
        """
        # maxMksConnections == max_connections
        if 'hardware' in self.params:
            if 'max_connections' in self.params['hardware']:
                self.configspec.maxMksConnections = int(self.params['hardware']['max_connections'])
                if vm_obj is None or self.configspec.maxMksConnections != vm_obj.config.hardware.maxMksConnections:
                    self.change_detected = True

            if 'nested_virt' in self.params['hardware']:
                self.configspec.nestedHVEnabled = bool(self.params['hardware']['nested_virt'])
                if vm_obj is None or self.configspec.nestedHVEnabled != bool(vm_obj.config.nestedHVEnabled):
                    self.change_detected = True

    def get_vm_cdrom_device(self, vm=None):
        if vm is None:
            return None

        for device in vm.config.hardware.device:
            if isinstance(device, vim.vm.device.VirtualCdrom):
                return device

        return None

    def get_vm_ide_device(self, vm=None):
        if vm is None:
            return None

        for device in vm.config.hardware.device:
            if isinstance(device, vim.vm.device.VirtualIDEController):
                return device

        return None

    def get_vm_network_interfaces(self, vm=None):
        if vm is None:
            return []

        device_list = []
        for device in vm.config.hardware.device:
            if isinstance(device, vim.vm.device.VirtualPCNet32) or \
               isinstance(device, vim.vm.device.VirtualVmxnet2) or \
               isinstance(device, vim.vm.device.VirtualVmxnet3) or \
               isinstance(device, vim.vm.device.VirtualE1000) or \
               isinstance(device, vim.vm.device.VirtualE1000e) or \
               isinstance(device, vim.vm.device.VirtualSriovEthernetCard):
                device_list.append(device)

        return device_list

    def configure_network(self, vm_obj):
        # Ignore empty networks, this permits to keep networks when deploying a template/cloning a VM
        if len(self.params['networks']) == 0:
            return

        network_devices = list()
        for network in self.params['networks']:
            if 'ip' in network or 'netmask' in network:
                if 'ip' not in network or 'netmask' not in network:
                    self.module.fail_json(msg="Both 'ip' and 'netmask' are required together.")

            if 'name' in network:
                if find_obj(self.content, [vim.Network], network['name']) is None:
                    self.module.fail_json(msg="Network '%(name)s' does not exists" % network)

            elif 'vlan' in network:
                dvps = self.cache.get_all_objs(self.content, [vim.dvs.DistributedVirtualPortgroup])
                for dvp in dvps:
                    if hasattr(dvp.config.defaultPortConfig, 'vlan') and dvp.config.defaultPortConfig.vlan.vlanId == network['vlan']:
                        network['name'] = dvp.config.name
                        break
                    if dvp.config.name == network['vlan']:
                        network['name'] = dvp.config.name
                        break
                else:
                    self.module.fail_json(msg="VLAN '%(vlan)s' does not exist" % network)
            else:
                self.module.fail_json(msg="You need to define a network name or a vlan")

            network_devices.append(network)

        # List current device for Clone or Idempotency
        current_net_devices = self.get_vm_network_interfaces(vm=vm_obj)
        if len(network_devices) < len(current_net_devices):
            self.module.fail_json(msg="given network device list is lesser than current VM device list (%d < %d). "
                                      "Removing interfaces is not allowed"
                                      % (len(network_devices), len(current_net_devices)))

        for key in range(0, len(network_devices)):
            # Default device type is vmxnet3, VMWare best practice
            device_type = network_devices[key].get('device_type', 'vmxnet3')
            nic = self.device_helper.create_nic(device_type,
                                                'Network Adapter %s' % (key + 1),
                                                network_devices[key])

            nic_change_detected = False
            if key < len(current_net_devices) and (vm_obj or self.params['template']):
                nic.operation = vim.vm.device.VirtualDeviceSpec.Operation.edit
                # Changing mac address has no effect when editing interface
                if 'mac' in network_devices[key] and nic.device.macAddress != current_net_devices[key].macAddress:
                    self.module.fail_json(msg="Changing MAC address has not effect when interface is already present. "
                                              "The failing new MAC address is %s" % nic.device.macAddress)

                nic.device = current_net_devices[key]
                if ('wake_on_lan' in network_devices[key] and
                        nic.device.wakeOnLanEnabled != network_devices[key].get('wake_on_lan')):
                    nic.device.wakeOnLanEnabled = network_devices[key].get('wake_on_lan')
                    nic_change_detected = True
                if ('start_connected' in network_devices[key] and
                        nic.device.connectable.startConnected != network_devices[key].get('start_connected')):
                    nic.device.connectable.startConnected = network_devices[key].get('start_connected')
                    nic_change_detected = True
                if ('allow_guest_control' in network_devices[key] and
                        nic.device.connectable.allowGuestControl != network_devices[key].get('allow_guest_control')):
                    nic.device.connectable.allowGuestControl = network_devices[key].get('allow_guest_control')
                    nic_change_detected = True

                nic.device.deviceInfo = vim.Description()
            else:
                nic.operation = vim.vm.device.VirtualDeviceSpec.Operation.add
                nic_change_detected = True

            if hasattr(self.cache.get_network(network_devices[key]['name']), 'portKeys'):
                # VDS switch
                pg_obj = find_obj(self.content, [vim.dvs.DistributedVirtualPortgroup], network_devices[key]['name'])

                if vm_obj is None or (nic.device.backing and not hasattr(nic.device.backing, 'port')) or \
                   (nic.device.backing and (nic.device.backing.port.portgroupKey != pg_obj.key or
                                            nic.device.backing.port.switchUuid != pg_obj.config.distributedVirtualSwitch.uuid)):
                    dvs_port_connection = vim.dvs.PortConnection()
                    dvs_port_connection.portgroupKey = pg_obj.key
                    dvs_port_connection.switchUuid = pg_obj.config.distributedVirtualSwitch.uuid
                    nic.device.backing = vim.vm.device.VirtualEthernetCard.DistributedVirtualPortBackingInfo()
                    nic.device.backing.port = dvs_port_connection
                    nic_change_detected = True
            else:
                # vSwitch
                if not isinstance(nic.device.backing, vim.vm.device.VirtualEthernetCard.NetworkBackingInfo):
                    nic.device.backing = vim.vm.device.VirtualEthernetCard.NetworkBackingInfo()
                    nic_change_detected = True

                net_obj = self.cache.get_network(network_devices[key]['name'])
                if nic.device.backing.network != net_obj:
                    nic.device.backing.network = net_obj
                    nic_change_detected = True

                if nic.device.backing.deviceName != network_devices[key]['name']:
                    nic.device.backing.deviceName = network_devices[key]['name']
                    nic_change_detected = True

            if nic_change_detected:
                self.configspec.deviceChange.append(nic)
                self.change_detected = True

    def customize_customvalues(self, vm_obj, config_spec):
        if len(self.params['customvalues']) == 0:
            return

        vm_custom_spec = config_spec
        vm_custom_spec.extraConfig = []

        changed = False
        facts = self.gather_facts(vm_obj)
        for kv in self.params['customvalues']:
            if 'key' not in kv or 'value' not in kv:
                self.module.exit_json(msg="customvalues items required both 'key' and 'value fields.")

            # If kv is not kv fetched from facts, change it
            if kv['key'] not in facts['customvalues'] or facts['customvalues'][kv['key']] != kv['value']:
                option = vim.option.OptionValue()
                option.key = kv['key']
                option.value = kv['value']

                vm_custom_spec.extraConfig.append(option)
                changed = True

        if changed:
            self.change_detected = True

    def customize_vm(self, vm_obj):
        # Network settings
        adaptermaps = []
        for network in self.params['networks']:

            guest_map = vim.vm.customization.AdapterMapping()
            guest_map.adapter = vim.vm.customization.IPSettings()

            if 'ip' in network and 'netmask' in network:
                if 'type' in network and network['type'] != 'static':
                    self.module.fail_json(msg='Static IP information provided for network "%(name)s", but "type" is set to "%(type)s".' % network)
                guest_map.adapter.ip = vim.vm.customization.FixedIp()
                guest_map.adapter.ip.ipAddress = str(network['ip'])
                guest_map.adapter.subnetMask = str(network['netmask'])
            elif 'type' in network and network['type'] == 'static':
                self.module.fail_json(msg='Network "%(name)s" was set to type "%(type)s", but "ip" and "netmask" are missing.' % network)
            elif 'type' in network and network['type'] == 'dhcp':
                guest_map.adapter.ip = vim.vm.customization.DhcpIpGenerator()
            else:
                self.module.fail_json(msg='Network "%(name)s" was set to unknown type "%(type)s".' % network)

            if 'gateway' in network:
                guest_map.adapter.gateway = network['gateway']

            # On Windows, DNS domain and DNS servers can be set by network interface
            # https://pubs.vmware.com/vi3/sdk/ReferenceGuide/vim.vm.customization.IPSettings.html
            if 'domain' in network:
                guest_map.adapter.dnsDomain = network['domain']
            elif 'domain' in self.params['customization']:
                guest_map.adapter.dnsDomain = self.params['customization']['domain']

            if 'dns_servers' in network:
                guest_map.adapter.dnsServerList = network['dns_servers']
            elif 'dns_servers' in self.params['customization']:
                guest_map.adapter.dnsServerList = self.params['customization']['dns_servers']

            adaptermaps.append(guest_map)

        # Global DNS settings
        globalip = vim.vm.customization.GlobalIPSettings()
        if 'dns_servers' in self.params['customization']:
            globalip.dnsServerList = self.params['customization']['dns_servers']

        # TODO: Maybe list the different domains from the interfaces here by default ?
        if 'dns_suffix' in self.params['customization']:
            globalip.dnsSuffixList = self.params['customization']['dns_suffix']
        elif 'domain' in self.params['customization']:
            globalip.dnsSuffixList = self.params['customization']['domain']

        if self.params['guest_id']:
            guest_id = self.params['guest_id']
        else:
            guest_id = vm_obj.summary.config.guestId

        # For windows guest OS, use SysPrep
        # https://pubs.vmware.com/vi3/sdk/ReferenceGuide/vim.vm.customization.Sysprep.html#field_detail
        if 'win' in guest_id:
            ident = vim.vm.customization.Sysprep()

            ident.userData = vim.vm.customization.UserData()

            # Setting hostName, orgName and fullName is mandatory, so we set some default when missing
            ident.userData.computerName = vim.vm.customization.FixedName()
            ident.userData.computerName.name = str(self.params['customization'].get('hostname', self.params['name'].split('.')[0]))
            ident.userData.fullName = str(self.params['customization'].get('fullname', 'Administrator'))
            ident.userData.orgName = str(self.params['customization'].get('orgname', 'ACME'))

            if 'productid' in self.params['customization']:
                ident.userData.productId = str(self.params['customization']['productid'])

            ident.guiUnattended = vim.vm.customization.GuiUnattended()

            if 'autologon' in self.params['customization']:
                ident.guiUnattended.autoLogon = self.params['customization']['autologon']
                ident.guiUnattended.autoLogonCount = self.params['customization'].get('autologoncount', 1)

            if 'timezone' in self.params['customization']:
                ident.guiUnattended.timeZone = self.params['customization']['timezone']

            ident.identification = vim.vm.customization.Identification()

            if self.params['customization'].get('password', '') != '':
                ident.guiUnattended.password = vim.vm.customization.Password()
                ident.guiUnattended.password.value = str(self.params['customization']['password'])
                ident.guiUnattended.password.plainText = True

            if 'joindomain' in self.params['customization']:
                if 'domainadmin' not in self.params['customization'] or 'domainadminpassword' not in self.params['customization']:
                    self.module.fail_json(msg="'domainadmin' and 'domainadminpassword' entries are mandatory in 'customization' section to use "
                                              "joindomain feature")

                ident.identification.domainAdmin = str(self.params['customization']['domainadmin'])
                ident.identification.joinDomain = str(self.params['customization']['joindomain'])
                ident.identification.domainAdminPassword = vim.vm.customization.Password()
                ident.identification.domainAdminPassword.value = str(self.params['customization']['domainadminpassword'])
                ident.identification.domainAdminPassword.plainText = True

            elif 'joinworkgroup' in self.params['customization']:
                ident.identification.joinWorkgroup = str(self.params['customization']['joinworkgroup'])

            if 'runonce' in self.params['customization']:
                ident.guiRunOnce = vim.vm.customization.GuiRunOnce()
                ident.guiRunOnce.commandList = self.params['customization']['runonce']

        else:
            # FIXME: We have no clue whether this non-Windows OS is actually Linux, hence it might fail !

            # For Linux guest OS, use LinuxPrep
            # https://pubs.vmware.com/vi3/sdk/ReferenceGuide/vim.vm.customization.LinuxPrep.html
            ident = vim.vm.customization.LinuxPrep()

            # TODO: Maybe add domain from interface if missing ?
            if 'domain' in self.params['customization']:
                ident.domain = str(self.params['customization']['domain'])

            ident.hostName = vim.vm.customization.FixedName()
            ident.hostName.name = str(self.params['customization'].get('hostname', self.params['name'].split('.')[0]))

        self.customspec = vim.vm.customization.Specification()
        self.customspec.nicSettingMap = adaptermaps
        self.customspec.globalIPSettings = globalip
        self.customspec.identity = ident

    def get_vm_scsi_controller(self, vm_obj):
        # If vm_obj doesn't exists no SCSI controller to find
        if vm_obj is None:
            return None

        for device in vm_obj.config.hardware.device:
            if self.device_helper.is_scsi_controller(device):
                scsi_ctl = vim.vm.device.VirtualDeviceSpec()
                scsi_ctl.device = device
                return scsi_ctl

        return None

    def get_configured_disk_size(self, expected_disk_spec):
        # what size is it?
        if [x for x in expected_disk_spec.keys() if x.startswith('size_') or x == 'size']:
            # size_tb, size_gb, size_mb, size_kb, size_b ...?
            if 'size' in expected_disk_spec:
                expected = ''.join(c for c in expected_disk_spec['size'] if c.isdigit())
                unit = expected_disk_spec['size'].replace(expected, '').lower()
                expected = int(expected)
            else:
                param = [x for x in expected_disk_spec.keys() if x.startswith('size_')][0]
                unit = param.split('_')[-1].lower()
                expected = [x[1] for x in expected_disk_spec.items() if x[0].startswith('size_')][0]
                expected = int(expected)

            if unit == 'tb':
                return expected * 1024 * 1024 * 1024
            elif unit == 'gb':
                return expected * 1024 * 1024
            elif unit == 'mb':
                return expected * 1024
            elif unit == 'kb':
                return expected

            self.module.fail_json(
                msg='%s is not a supported unit for disk size. Supported units are kb, mb, gb or tb' % unit)

        # No size found but disk, fail
        self.module.fail_json(
            msg="No size, size_kb, size_mb, size_gb or size_tb attribute found into disk configuration")

    def configure_disks(self, vm_obj):
        # Ignore empty disk list, this permits to keep disks when deploying a template/cloning a VM
        if len(self.params['disk']) == 0:
            return

        scsi_ctl = self.get_vm_scsi_controller(vm_obj)

        # Create scsi controller only if we are deploying a new VM, not a template or reconfiguring
        if vm_obj is None or scsi_ctl is None:
            scsi_ctl = self.device_helper.create_scsi_controller(self.get_scsi_type())
            self.change_detected = True
            self.configspec.deviceChange.append(scsi_ctl)

        disks = [x for x in vm_obj.config.hardware.device if isinstance(x, vim.vm.device.VirtualDisk)] \
            if vm_obj is not None else None

        if disks is not None and self.params.get('disk') and len(self.params.get('disk')) < len(disks):
            self.module.fail_json(msg="Provided disks configuration has less disks than "
                                      "the target object (%d vs %d)" % (len(self.params.get('disk')), len(disks)))

        disk_index = 0
        for expected_disk_spec in self.params.get('disk'):
            disk_modified = False
            # If we are manipulating and existing objects which has disks and disk_index is in disks
            if vm_obj is not None and disks is not None and disk_index < len(disks):
                diskspec = vim.vm.device.VirtualDeviceSpec()
                # set the operation to edit so that it knows to keep other settings
                diskspec.operation = vim.vm.device.VirtualDeviceSpec.Operation.edit
                diskspec.device = disks[disk_index]
            else:
                diskspec = self.device_helper.create_scsi_disk(scsi_ctl, disk_index)
                disk_modified = True

            # is it thin?
            if 'type' in expected_disk_spec:
                disk_type = expected_disk_spec.get('type', '').lower()
                if disk_type == 'thin':
                    diskspec.device.backing.thinProvisioned = True
                elif disk_type == 'eagerzeroedthick':
                    diskspec.device.backing.eagerlyScrub = True

            # which datastore?
            if expected_disk_spec.get('datastore'):
                # TODO: This is already handled by the relocation spec,
                # but it needs to eventually be handled for all the
                # other disks defined
                pass

            # increment index for next disk search
            disk_index += 1
            # index 7 is reserved to SCSI controller
            if disk_index == 7:
                disk_index += 1

            kb = self.get_configured_disk_size(expected_disk_spec)
            # VMWare doesn't allow to reduce disk sizes
            if kb < diskspec.device.capacityInKB:
                self.module.fail_json(
                    msg="Given disk size is smaller than found (%d < %d). Reducing disks is not allowed." %
                        (kb, diskspec.device.capacityInKB))

            if kb != diskspec.device.capacityInKB or disk_modified:
                diskspec.device.capacityInKB = kb
                self.configspec.deviceChange.append(diskspec)

                self.change_detected = True

    def select_host(self):
        # if the user wants a cluster, get the list of hosts for the cluster and use the first one
        if self.params['cluster']:
            cluster = self.cache.get_cluster(self.params['cluster'])
            if not cluster:
                self.module.fail_json(msg='Failed to find cluster "%(cluster)s"' % self.params)
            hostsystems = [x for x in cluster.host]
            if not hostsystems:
                self.module.fail_json(msg='No hosts found in cluster "%(cluster)s. Maybe you lack the right privileges ?"' % self.params)
            # TODO: add a policy to select host
            hostsystem = hostsystems[0]
        else:
            hostsystem = self.cache.get_esx_host(self.params['esxi_hostname'])
            if not hostsystem:
                self.module.fail_json(msg='Failed to find ESX host "%(esxi_hostname)s"' % self.params)

        return hostsystem

    def autoselect_datastore(self):
        datastore = None
        datastores = self.cache.get_all_objs(self.content, [vim.Datastore])

        if datastores is None or len(datastores) == 0:
            self.module.fail_json(msg="Unable to find a datastore list when autoselecting")

        datastore_freespace = 0
        for ds in datastores:
            if ds.summary.freeSpace > datastore_freespace:
                datastore = ds
                datastore_freespace = ds.summary.freeSpace

        return datastore

    def get_recommended_datastore(self, datastore_cluster_obj=None):
        """
        Function to return Storage DRS recommended datastore from datastore cluster
        Args:
            datastore_cluster_obj: datastore cluster managed object

        Returns: Name of recommended datastore from the given datastore cluster

        """
        if datastore_cluster_obj is None:
            return None
        # Check if Datastore Cluster provided by user is SDRS ready
        sdrs_status = datastore_cluster_obj.podStorageDrsEntry.storageDrsConfig.podConfig.enabled
        if sdrs_status:
            # We can get storage recommendation only if SDRS is enabled on given datastorage cluster
            pod_sel_spec = vim.storageDrs.PodSelectionSpec()
            pod_sel_spec.storagePod = datastore_cluster_obj
            storage_spec = vim.storageDrs.StoragePlacementSpec()
            storage_spec.podSelectionSpec = pod_sel_spec
            storage_spec.type = 'create'

            try:
                rec = self.content.storageResourceManager.RecommendDatastores(storageSpec=storage_spec)
                rec_action = rec.recommendations[0].action[0]
                return rec_action.destination.name
            except Exception as e:
                # There is some error so we fall back to general workflow
                pass
        datastore = None
        datastore_freespace = 0
        for ds in datastore_cluster_obj.childEntity:
            if isinstance(ds, vim.Datastore) and ds.summary.freeSpace > datastore_freespace:
                # If datastore field is provided, filter destination datastores
                datastore = ds
                datastore_freespace = ds.summary.freeSpace
        if datastore:
            return datastore.name
        return None

    def select_datastore(self, vm_obj=None):
        datastore = None
        datastore_name = None

        if len(self.params['disk']) != 0:
            # TODO: really use the datastore for newly created disks
            if 'autoselect_datastore' in self.params['disk'][0] and self.params['disk'][0]['autoselect_datastore']:
                datastores = self.cache.get_all_objs(self.content, [vim.Datastore])
                datastores = [x for x in datastores if self.cache.get_parent_datacenter(x).name == self.params['datacenter']]
                if datastores is None or len(datastores) == 0:
                    self.module.fail_json(msg="Unable to find a datastore list when autoselecting")

                datastore_freespace = 0
                for ds in datastores:
                    if (ds.summary.freeSpace > datastore_freespace) or (ds.summary.freeSpace == datastore_freespace and not datastore):
                        # If datastore field is provided, filter destination datastores
                        if 'datastore' in self.params['disk'][0] and \
                                isinstance(self.params['disk'][0]['datastore'], str) and \
                                ds.name.find(self.params['disk'][0]['datastore']) < 0:
                            continue

                        datastore = ds
                        datastore_name = datastore.name
                        datastore_freespace = ds.summary.freeSpace

            elif 'datastore' in self.params['disk'][0]:
                datastore_name = self.params['disk'][0]['datastore']
                # Check if user has provided datastore cluster first
                datastore_cluster = self.cache.find_obj(self.content, [vim.StoragePod], datastore_name)
                if datastore_cluster:
                    # If user specified datastore cluster so get recommended datastore
                    datastore_name = self.get_recommended_datastore(datastore_cluster_obj=datastore_cluster)
                # Check if get_recommended_datastore or user specified datastore exists or not
                datastore = self.cache.find_obj(self.content, [vim.Datastore], datastore_name)
            else:
                self.module.fail_json(msg="Either datastore or autoselect_datastore should be provided to select datastore")

        if not datastore and self.params['template']:
            # use the template's existing DS
            disks = [x for x in vm_obj.config.hardware.device if isinstance(x, vim.vm.device.VirtualDisk)]
            if disks:
                datastore = disks[0].backing.datastore
                datastore_name = datastore.name
            # validation
            if datastore:
                dc = self.cache.get_parent_datacenter(datastore)
                if dc.name != self.params['datacenter']:
                    datastore = self.autoselect_datastore()
                    datastore_name = datastore.name

        if not datastore:
            if len(self.params['disk']) != 0 or self.params['template'] is None:
                self.module.fail_json(msg="Unable to find the datastore with given parameters."
                                          " This could mean, %s is a non-existent virtual machine and module tried to"
                                          " deploy it as new virtual machine with no disk. Please specify disks parameter"
                                          " or specify template to clone from." % self.params['name'])
            self.module.fail_json(msg="Failed to find a matching datastore")

        return datastore, datastore_name

    def obj_has_parent(self, obj, parent):
        if obj is None and parent is None:
            raise AssertionError()
        current_parent = obj

        while True:
            if current_parent.name == parent.name:
                return True

            # Check if we have reached till root folder
            moid = current_parent._moId
            if moid in ['group-d1', 'ha-folder-root']:
                return False

            current_parent = current_parent.parent
            if current_parent is None:
                return False

    def select_resource_pool_by_name(self, resource_pool_name):
        resource_pool = self.cache.find_obj(self.content, [vim.ResourcePool], resource_pool_name)
        if resource_pool is None:
            self.module.fail_json(msg='Could not find resource_pool "%s"' % resource_pool_name)
        return resource_pool

    def select_resource_pool_by_host(self, host):
        resource_pools = self.cache.get_all_objs(self.content, [vim.ResourcePool])
        for rp in resource_pools.items():
            if not rp[0]:
                continue

            if not hasattr(rp[0], 'parent') or not rp[0].parent:
                continue

            # Find resource pool on host
            if self.obj_has_parent(rp[0].parent, host.parent):
                # If no resource_pool selected or it's the selected pool, return it
                if self.module.params['resource_pool'] is None or rp[0].name == self.module.params['resource_pool']:
                    return rp[0]

        if self.module.params['resource_pool'] is not None:
            self.module.fail_json(msg="Could not find resource_pool %s for selected host %s"
                                  % (self.module.params['resource_pool'], host.name))
        else:
            self.module.fail_json(msg="Failed to find a resource group for %s" % host.name)

    def get_scsi_type(self):
        disk_controller_type = "paravirtual"
        # set cpu/memory/etc
        if 'hardware' in self.params:
            if 'scsi' in self.params['hardware']:
                if self.params['hardware']['scsi'] in ['buslogic', 'paravirtual', 'lsilogic', 'lsilogicsas']:
                    disk_controller_type = self.params['hardware']['scsi']
                else:
                    self.module.fail_json(msg="hardware.scsi attribute should be 'paravirtual' or 'lsilogic'")
        return disk_controller_type

    def find_folder(self, searchpath):
        """ Walk inventory objects one position of the searchpath at a time """

        # split the searchpath so we can iterate through it
        paths = [x.replace('/', '') for x in searchpath.split('/')]
        paths_total = len(paths) - 1
        position = 0

        # recursive walk while looking for next element in searchpath
        root = self.content.rootFolder
        while root and position <= paths_total:
            change = False
            if hasattr(root, 'childEntity'):
                for child in root.childEntity:
                    if child.name == paths[position]:
                        root = child
                        position += 1
                        change = True
                        break
            elif isinstance(root, vim.Datacenter):
                if hasattr(root, 'vmFolder'):
                    if root.vmFolder.name == paths[position]:
                        root = root.vmFolder
                        position += 1
                        change = True
            else:
                root = None

            if not change:
                root = None

        return root

    def get_resource_pool(self):
        resource_pool = None
        # highest priority, resource_pool given.
        if self.params['resource_pool']:
            resource_pool = self.select_resource_pool_by_name(self.params['resource_pool'])
        # next priority, esxi hostname given.
        elif self.params['esxi_hostname']:
            host = self.select_host()
            resource_pool = self.select_resource_pool_by_host(host)
        # next priority, cluster given, take the root of the pool
        elif self.params['cluster']:
            cluster = self.cache.get_cluster(self.params['cluster'])
            resource_pool = cluster.resourcePool
        # fallback, pick any RP
        else:
            resource_pool = self.select_resource_pool_by_name(self.params['resource_pool'])

        if resource_pool is None:
            self.module.fail_json(msg='Unable to find resource pool, need esxi_hostname, resource_pool, or cluster')

        return resource_pool

    def deploy_vm(self):
        # https://github.com/vmware/pyvmomi-community-samples/blob/master/samples/clone_vm.py
        # https://www.vmware.com/support/developer/vc-sdk/visdk25pubs/ReferenceGuide/vim.vm.CloneSpec.html
        # https://www.vmware.com/support/developer/vc-sdk/visdk25pubs/ReferenceGuide/vim.vm.ConfigSpec.html
        # https://www.vmware.com/support/developer/vc-sdk/visdk41pubs/ApiReference/vim.vm.RelocateSpec.html

        # FIXME:
        #   - static IPs

        self.folder = self.params.get('folder', None)
        if self.folder is None:
            self.module.fail_json(msg="Folder is required parameter while deploying new virtual machine")

        # Prepend / if it was missing from the folder path, also strip trailing slashes
        if not self.folder.startswith('/'):
            self.folder = '/%(folder)s' % self.params
        self.folder = self.folder.rstrip('/')

        datacenter = self.cache.find_obj(self.content, [vim.Datacenter], self.params['datacenter'])
        if datacenter is None:
            self.module.fail_json(msg='No datacenter named %(datacenter)s was found' % self.params)

        dcpath = compile_folder_path_for_object(datacenter)

        # Nested folder does not have trailing /
        if not dcpath.endswith('/'):
            dcpath += '/'

        # Check for full path first in case it was already supplied
        if (self.folder.startswith(dcpath + self.params['datacenter'] + '/vm') or
                self.folder.startswith(dcpath + '/' + self.params['datacenter'] + '/vm')):
            fullpath = self.folder
        elif self.folder.startswith('/vm/') or self.folder == '/vm':
            fullpath = "%s%s%s" % (dcpath, self.params['datacenter'], self.folder)
        elif self.folder.startswith('/'):
            fullpath = "%s%s/vm%s" % (dcpath, self.params['datacenter'], self.folder)
        else:
            fullpath = "%s%s/vm/%s" % (dcpath, self.params['datacenter'], self.folder)

        f_obj = self.content.searchIndex.FindByInventoryPath(fullpath)

        # abort if no strategy was successful
        if f_obj is None:
            # Add some debugging values in failure.
            details = {
                'datacenter': datacenter.name,
                'datacenter_path': dcpath,
                'folder': self.folder,
                'full_search_path': fullpath,
            }
            self.module.fail_json(msg='No folder %s matched in the search path : %s' % (self.folder, fullpath),
                                  details=details)

        destfolder = f_obj

        if self.params['template']:
            vm_obj = self.get_vm_or_template(template_name=self.params['template'])
            if vm_obj is None:
                self.module.fail_json(msg="Could not find a template named %(template)s" % self.params)
        else:
            vm_obj = None

        # always get a resource_pool
        resource_pool = self.get_resource_pool()

        # set the destination datastore for VM & disks
        (datastore, datastore_name) = self.select_datastore(vm_obj)

        self.configspec = vim.vm.ConfigSpec()
        self.configspec.deviceChange = []
        self.configure_guestid(vm_obj=vm_obj, vm_creation=True)
        self.configure_cpu_and_memory(vm_obj=vm_obj, vm_creation=True)
        self.configure_hardware_params(vm_obj=vm_obj)
        self.configure_resource_alloc_info(vm_obj=vm_obj)
        self.configure_disks(vm_obj=vm_obj)
        self.configure_network(vm_obj=vm_obj)
        self.configure_cdrom(vm_obj=vm_obj)

        # Find if we need network customizations (find keys in dictionary that requires customizations)
        network_changes = False
        for nw in self.params['networks']:
            for key in nw:
                # We don't need customizations for these keys
                if key not in ('device_type', 'mac', 'name', 'vlan'):
                    network_changes = True
                    break

        if len(self.params['customization']) > 0 or network_changes is True:
            self.customize_vm(vm_obj=vm_obj)

        clonespec = None
        clone_method = None
        try:
            if self.params['template']:
                # create the relocation spec
                relospec = vim.vm.RelocateSpec()

                # Only select specific host when ESXi hostname is provided
                if self.params['esxi_hostname']:
                    relospec.host = self.select_host()
                relospec.datastore = datastore

                # https://www.vmware.com/support/developer/vc-sdk/visdk41pubs/ApiReference/vim.vm.RelocateSpec.html
                # > pool: For a clone operation from a template to a virtual machine, this argument is required.
                relospec.pool = resource_pool

                if self.params['snapshot_src'] is not None and self.params['linked_clone']:
                    relospec.diskMoveType = vim.vm.RelocateSpec.DiskMoveOptions.createNewChildDiskBacking

                clonespec = vim.vm.CloneSpec(template=self.params['is_template'], location=relospec)
                if self.customspec:
                    clonespec.customization = self.customspec

                if self.params['snapshot_src'] is not None:
                    snapshot = self.get_snapshots_by_name_recursively(snapshots=vm_obj.snapshot.rootSnapshotList, snapname=self.params['snapshot_src'])
                    if len(snapshot) != 1:
                        self.module.fail_json(msg='virtual machine "%(template)s" does not contain snapshot named "%(snapshot_src)s"' % self.params)

                    clonespec.snapshot = snapshot[0].snapshot

                clonespec.config = self.configspec
                clone_method = 'Clone'
                try:
                    task = vm_obj.Clone(folder=destfolder, name=self.params['name'], spec=clonespec)
                except vim.fault.NoPermission as e:
                    self.module.fail_json(msg="Failed to clone virtual machine %s to folder %s "
                                              "due to permission issue: %s" % (self.params['name'],
                                                                               destfolder,
                                                                               to_native(e.msg)))
                self.change_detected = True
            else:
                # ConfigSpec require name for VM creation
                self.configspec.name = self.params['name']
                self.configspec.files = vim.vm.FileInfo(logDirectory=None,
                                                        snapshotDirectory=None,
                                                        suspendDirectory=None,
                                                        vmPathName="[" + datastore_name + "]")

                clone_method = 'CreateVM_Task'
                try:
                    task = destfolder.CreateVM_Task(config=self.configspec, pool=resource_pool)
                except vmodl.fault.InvalidRequest as e:
                    self.module.fail_json(msg="Failed to create virtual machine due to invalid configuration "
                                              "parameter %s" % to_native(e.msg))
                except vim.fault.RestrictedVersion as e:
                    self.module.fail_json(msg="Failed to create virtual machine due to "
                                              "product versioning restrictions: %s" % to_native(e.msg))
                self.change_detected = True
            self.wait_for_task(task)
        except TypeError as e:
            self.module.fail_json(msg="TypeError was returned, please ensure to give correct inputs. %s" % to_text(e))

        if task.info.state == 'error':
            # https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2021361
            # https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2173

            # provide these to the user for debugging
            clonespec_json = serialize_spec(clonespec)
            configspec_json = serialize_spec(self.configspec)
            kwargs = {
                'changed': self.change_detected,
                'failed': True,
                'msg': task.info.error.msg,
                'clonespec': clonespec_json,
                'configspec': configspec_json,
                'clone_method': clone_method
            }

            return kwargs
        else:
            # set annotation
            vm = task.info.result
            if self.params['annotation']:
                annotation_spec = vim.vm.ConfigSpec()
                annotation_spec.annotation = str(self.params['annotation'])
                task = vm.ReconfigVM_Task(annotation_spec)
                self.wait_for_task(task)

            if self.params['customvalues']:
                vm_custom_spec = vim.vm.ConfigSpec()
                self.customize_customvalues(vm_obj=vm, config_spec=vm_custom_spec)
                task = vm.ReconfigVM_Task(vm_custom_spec)
                self.wait_for_task(task)

            if self.params['wait_for_ip_address'] or self.params['state'] in ['poweredon', 'restarted']:
                set_vm_power_state(self.content, vm, 'poweredon', force=False)

                if self.params['wait_for_ip_address']:
                    self.wait_for_vm_ip(vm)

            vm_facts = self.gather_facts(vm)
            return {'changed': self.change_detected, 'failed': False, 'instance': vm_facts}

    def get_snapshots_by_name_recursively(self, snapshots, snapname):
        snap_obj = []
        for snapshot in snapshots:
            if snapshot.name == snapname:
                snap_obj.append(snapshot)
            else:
                snap_obj = snap_obj + self.get_snapshots_by_name_recursively(snapshot.childSnapshotList, snapname)
        return snap_obj

    def reconfigure_vm(self):
        self.configspec = vim.vm.ConfigSpec()
        self.configspec.deviceChange = []

        self.configure_guestid(vm_obj=self.current_vm_obj)
        self.configure_cpu_and_memory(vm_obj=self.current_vm_obj)
        self.configure_hardware_params(vm_obj=self.current_vm_obj)
        self.configure_disks(vm_obj=self.current_vm_obj)
        self.configure_network(vm_obj=self.current_vm_obj)
        self.configure_cdrom(vm_obj=self.current_vm_obj)
        self.customize_customvalues(vm_obj=self.current_vm_obj, config_spec=self.configspec)
        self.configure_resource_alloc_info(vm_obj=self.current_vm_obj)

        if self.params['annotation'] and self.current_vm_obj.config.annotation != self.params['annotation']:
            self.configspec.annotation = str(self.params['annotation'])
            self.change_detected = True

        change_applied = False

        relospec = vim.vm.RelocateSpec()
        if self.params['resource_pool']:
            relospec.pool = self.select_resource_pool_by_name(self.params['resource_pool'])

            if relospec.pool is None:
                self.module.fail_json(msg='Unable to find resource pool "%(resource_pool)s"' % self.params)

            elif relospec.pool != self.current_vm_obj.resourcePool:
                task = self.current_vm_obj.RelocateVM_Task(spec=relospec)
                self.wait_for_task(task)
                change_applied = True

        # Only send VMWare task if we see a modification
        if self.change_detected:
            task = None
            try:
                task = self.current_vm_obj.ReconfigVM_Task(spec=self.configspec)
            except vim.fault.RestrictedVersion as e:
                self.module.fail_json(msg="Failed to reconfigure virtual machine due to"
                                          " product versioning restrictions: %s" % to_native(e.msg))
            self.wait_for_task(task)
            change_applied = True

            if task.info.state == 'error':
                # https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2021361
                # https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2173
                return {'changed': change_applied, 'failed': True, 'msg': task.info.error.msg}

        # Rename VM
        if self.params['uuid'] and self.params['name'] and self.params['name'] != self.current_vm_obj.config.name:
            task = self.current_vm_obj.Rename_Task(self.params['name'])
            self.wait_for_task(task)
            change_applied = True

            if task.info.state == 'error':
                return {'changed': change_applied, 'failed': True, 'msg': task.info.error.msg}

        # Mark VM as Template
        if self.params['is_template'] and not self.current_vm_obj.config.template:
            try:
                self.current_vm_obj.MarkAsTemplate()
            except vmodl.fault.NotSupported as e:
                self.module.fail_json(msg="Failed to mark virtual machine [%s] "
                                          "as template: %s" % (self.params['name'], e.msg))
            change_applied = True

        # Mark Template as VM
        elif not self.params['is_template'] and self.current_vm_obj.config.template:
            if self.params['resource_pool']:
                resource_pool = self.select_resource_pool_by_name(self.params['resource_pool'])

                if resource_pool is None:
                    self.module.fail_json(msg='Unable to find resource pool "%(resource_pool)s"' % self.params)

                self.current_vm_obj.MarkAsVirtualMachine(pool=resource_pool)

                # Automatically update VMWare UUID when converting template to VM.
                # This avoids an interactive prompt during VM startup.
                uuid_action = [x for x in self.current_vm_obj.config.extraConfig if x.key == "uuid.action"]
                if not uuid_action:
                    uuid_action_opt = vim.option.OptionValue()
                    uuid_action_opt.key = "uuid.action"
                    uuid_action_opt.value = "create"
                    self.configspec.extraConfig.append(uuid_action_opt)
                    self.change_detected = True

                change_applied = True
            else:
                self.module.fail_json(msg="Resource pool must be specified when converting template to VM!")

        vm_facts = self.gather_facts(self.current_vm_obj)
        return {'changed': change_applied, 'failed': False, 'instance': vm_facts}

    @staticmethod
    def wait_for_task(task):
        # https://www.vmware.com/support/developer/vc-sdk/visdk25pubs/ReferenceGuide/vim.Task.html
        # https://www.vmware.com/support/developer/vc-sdk/visdk25pubs/ReferenceGuide/vim.TaskInfo.html
        # https://github.com/virtdevninja/pyvmomi-community-samples/blob/master/samples/tools/tasks.py
        while task.info.state not in ['error', 'success']:
            time.sleep(1)

    def wait_for_vm_ip(self, vm, poll=100, sleep=5):
        ips = None
        facts = {}
        thispoll = 0
        while not ips and thispoll <= poll:
            newvm = self.get_vm()
            facts = self.gather_facts(newvm)
            if facts['ipv4'] or facts['ipv6']:
                ips = True
            else:
                time.sleep(sleep)
                thispoll += 1

        return facts


def main():
    argument_spec = vmware_argument_spec()
    argument_spec.update(
        state=dict(type='str', default='present',
                   choices=['absent', 'poweredoff', 'poweredon', 'present', 'rebootguest', 'restarted', 'shutdownguest', 'suspended']),
        template=dict(type='str', aliases=['template_src']),
        is_template=dict(type='bool', default=False),
        annotation=dict(type='str', aliases=['notes']),
        customvalues=dict(type='list', default=[]),
        name=dict(type='str'),
        name_match=dict(type='str', choices=['first', 'last'], default='first'),
        uuid=dict(type='str'),
        folder=dict(type='str'),
        guest_id=dict(type='str'),
        disk=dict(type='list', default=[]),
        cdrom=dict(type='dict', default={}),
        hardware=dict(type='dict', default={}),
        force=dict(type='bool', default=False),
        datacenter=dict(type='str', default='ha-datacenter'),
        esxi_hostname=dict(type='str'),
        cluster=dict(type='str'),
        wait_for_ip_address=dict(type='bool', default=False),
        snapshot_src=dict(type='str'),
        linked_clone=dict(type='bool', default=False),
        networks=dict(type='list', default=[]),
        resource_pool=dict(type='str'),
        customization=dict(type='dict', default={}, no_log=True),
    )

    module = AnsibleModule(argument_spec=argument_spec,
                           supports_check_mode=True,
                           mutually_exclusive=[
                               ['cluster', 'esxi_hostname'],
                           ],
                           required_one_of=[
                               ['name', 'uuid'],
                           ],
                           )

    result = {'failed': False, 'changed': False}

    pyv = PyVmomiHelper(module)

    # Check if the VM exists before continuing
    vm = pyv.get_vm()

    # VM already exists
    if vm:
        if module.params['state'] == 'absent':
            # destroy it
            if module.check_mode:
                result.update(
                    vm_name=vm.name,
                    changed=True,
                    current_powerstate=vm.summary.runtime.powerState.lower(),
                    desired_operation='remove_vm',
                )
                module.exit_json(**result)
            if module.params['force']:
                # has to be poweredoff first
                set_vm_power_state(pyv.content, vm, 'poweredoff', module.params['force'])
            result = pyv.remove_vm(vm)
        elif module.params['state'] == 'present':
            if module.check_mode:
                result.update(
                    vm_name=vm.name,
                    changed=True,
                    desired_operation='reconfigure_vm',
                )
                module.exit_json(**result)
            result = pyv.reconfigure_vm()
        elif module.params['state'] in ['poweredon', 'poweredoff', 'restarted', 'suspended', 'shutdownguest', 'rebootguest']:
            if module.check_mode:
                result.update(
                    vm_name=vm.name,
                    changed=True,
                    current_powerstate=vm.summary.runtime.powerState.lower(),
                    desired_operation='set_vm_power_state',
                )
                module.exit_json(**result)
            # set powerstate
            tmp_result = set_vm_power_state(pyv.content, vm, module.params['state'], module.params['force'])
            if tmp_result['changed']:
                result["changed"] = True
            if not tmp_result["failed"]:
                result["failed"] = False
        else:
            # This should not happen
            raise AssertionError()
    # VM doesn't exist
    else:
        if module.params['state'] in ['poweredon', 'poweredoff', 'present', 'restarted', 'suspended']:
            if module.check_mode:
                result.update(
                    changed=True,
                    desired_operation='deploy_vm',
                )
                module.exit_json(**result)
            result = pyv.deploy_vm()
            if result['failed']:
                module.fail_json(msg='Failed to create a virtual machine : %s' % result['msg'])

    if result['failed']:
        module.fail_json(**result)
    else:
        module.exit_json(**result)


if __name__ == '__main__':
    main()
