#!/usr/bin/python
# -*- coding: utf-8 -*-

# Copyright: (c) 2017, Wei Gao <gaowei3@qq.com>
# Copyright: (c) 2018, Ansible Project
# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
# SPDX-License-Identifier: GPL-3.0-or-later

from __future__ import absolute_import, division, print_function
__metaclass__ = type

DOCUMENTATION = r'''
---
module: vmware_host_facts
short_description: Gathers facts about remote ESXi hostsystem
description:
    - This module can be used to gathers facts like CPU, memory, datastore, network and system etc. about ESXi host system.
    - Please specify hostname or IP address of ESXi host system as O(hostname).
    - If hostname or IP address of vCenter is provided as O(hostname) and O(esxi_hostname) is not specified, then the
      module will throw an error.
    - Please note that when ESXi host connection state is not C(connected), facts returned from vCenter might be stale.
      Users are recommended to check connection state value and take appropriate decision in the playbook.
author:
    - Wei Gao (@woshihaoren)
options:
  esxi_hostname:
    description:
    - ESXi hostname.
    - Host facts about the specified ESXi server will be returned.
    - By specifying this option, you can select which ESXi hostsystem is returned if connecting to a vCenter.
    type: str
  show_tag:
    description:
    - Tags related to Host are shown if set to V(true).
    default: false
    type: bool
    required: false
  show_datacenter:
    version_added: 4.2.0
    description:
    - Return the related Datacenter if set to V(true).
    default: false
    type: bool
    required: false
  schema:
    description:
    - Specify the output schema desired.
    - The V(summary) output schema is the legacy output from the module
    - The V(vsphere) output schema is the vSphere API class definition
    choices: ['summary', 'vsphere']
    default: 'summary'
    type: str
  properties:
    description:
      - Specify the properties to retrieve.
      - If not specified, all properties are retrieved (deeply).
      - Results are returned in a structure identical to the vsphere API.
      - 'Example:'
      - '   properties: ['
      - '      "hardware.memorySize",'
      - '      "hardware.cpuInfo.numCpuCores",'
      - '      "config.product.apiVersion",'
      - '      "overallStatus"'
      - '   ]'
      - Only valid when O(schema=vsphere).
    type: list
    elements: str
    required: false
extends_documentation_fragment:
- community.vmware.vmware.documentation

'''

EXAMPLES = r'''
- name: Gather vmware host facts
  community.vmware.vmware_host_facts:
    hostname: "{{ esxi_server }}"
    username: "{{ esxi_username }}"
    password: "{{ esxi_password }}"
  register: host_facts
  delegate_to: localhost

- name: Gather vmware host facts from vCenter
  community.vmware.vmware_host_facts:
    hostname: "{{ vcenter_hostname }}"
    username: "{{ vcenter_username }}"
    password: "{{ vcenter_password }}"
    esxi_hostname: "{{ esxi_hostname }}"
  register: host_facts
  delegate_to: localhost

- name: Gather vmware host facts from vCenter with tag information
  community.vmware.vmware_host_facts:
    hostname: "{{ vcenter_hostname }}"
    username: "{{ vcenter_username }}"
    password: "{{ vcenter_password }}"
    esxi_hostname: "{{ esxi_hostname }}"
    show_tag: true
  register: host_facts_tag
  delegate_to: localhost

- name: Get VSAN Cluster UUID from host facts
  community.vmware.vmware_host_facts:
    hostname: "{{ esxi_server }}"
    username: "{{ esxi_username }}"
    password: "{{ esxi_password }}"
  register: host_facts
- set_fact:
    cluster_uuid: "{{ host_facts['ansible_facts']['vsan_cluster_uuid'] }}"

- name: Gather some info from a host using the vSphere API output schema
  community.vmware.vmware_host_facts:
    hostname: "{{ vcenter_hostname }}"
    username: "{{ vcenter_username }}"
    password: "{{ vcenter_password }}"
    esxi_hostname: "{{ esxi_hostname }}"
    schema: vsphere
    properties:
      - hardware.memorySize
      - hardware.cpuInfo.numCpuCores
      - config.product.apiVersion
      - overallStatus
  register: host_facts

- name: Gather information about powerstate and connection state
  community.vmware.vmware_host_facts:
    hostname: "{{ vcenter_hostname }}"
    username: "{{ vcenter_username }}"
    password: "{{ vcenter_password }}"
    esxi_hostname: "{{ esxi_hostname }}"
    schema: vsphere
    properties:
      - runtime.connectionState
      - runtime.powerState

- name: How to retrieve Product, Version, Build, Update info for ESXi from vCenter
  block:
    - name: Gather product version info for ESXi from vCenter
      community.vmware.vmware_host_facts:
        hostname: "{{ vcenter_hostname }}"
        username: "{{ vcenter_username }}"
        password: "{{ vcenter_password }}"
        esxi_hostname: "{{ esxi_hostname }}"
        schema: vsphere
        properties:
          - config.product
          - config.option
      register: gather_host_facts_result

    - name: Extract update level info from option properties
      set_fact:
        update_level_info: "{{ item.value }}"
      loop: "{{ gather_host_facts_result.ansible_facts.config.option }}"
      when:
        - item.key == 'Misc.HostAgentUpdateLevel'

    - name: The output of Product, Version, Build, Update info for ESXi
      debug:
        msg:
          - "Product : {{ gather_host_facts_result.ansible_facts.config.product.name }}"
          - "Version : {{ gather_host_facts_result.ansible_facts.config.product.version }}"
          - "Build   : {{ gather_host_facts_result.ansible_facts.config.product.build }}"
          - "Update  : {{ update_level_info }}"
'''

RETURN = r'''
ansible_facts:
  description: system info about the host machine
  returned: always
  type: dict
  sample:
    {
        "ansible_all_ipv4_addresses": [
            "10.76.33.200"
        ],
        "ansible_bios_date": "2011-01-01T00:00:00+00:00",
        "ansible_bios_version": "0.5.1",
        "ansible_datastore": [
            {
                "free": "11.63 GB",
                "name": "datastore1",
                "total": "12.50 GB"
            }
        ],
        "ansible_distribution": "VMware ESXi",
        "ansible_distribution_build": "4887370",
        "ansible_distribution_version": "6.5.0",
        "ansible_hostname": "10.76.33.100",
        "ansible_in_maintenance_mode": true,
        "ansible_interfaces": [
            "vmk0"
        ],
        "ansible_memfree_mb": 2702,
        "ansible_memtotal_mb": 4095,
        "ansible_os_type": "vmnix-x86",
        "ansible_processor": "Intel Xeon E312xx (Sandy Bridge)",
        "ansible_processor_cores": 2,
        "ansible_processor_count": 2,
        "ansible_processor_vcpus": 2,
        "ansible_product_name": "KVM",
        "ansible_product_serial": "NA",
        "ansible_system_vendor": "Red Hat",
        "ansible_uptime": 1791680,
        "ansible_uuid": "4c4c4544-0052-3410-804c-b2c04f4e3632",
        "ansible_vmk0": {
            "device": "vmk0",
            "ipv4": {
                "address": "10.76.33.100",
                "netmask": "255.255.255.0"
            },
            "macaddress": "52:54:00:56:7d:59",
            "mtu": 1500
        },
        "vsan_cluster_uuid": null,
        "vsan_node_uuid": null,
        "vsan_health": "unknown",
        "tags": [
            {
                "category_id": "urn:vmomi:InventoryServiceCategory:8eb81431-b20d-49f5-af7b-126853aa1189:GLOBAL",
                "category_name": "host_category_0001",
                "description": "",
                "id": "urn:vmomi:InventoryServiceTag:e9398232-46fd-461a-bf84-06128e182a4a:GLOBAL",
                "name": "host_tag_0001"
            }
        ],
    }
'''

from ansible.module_utils.basic import AnsibleModule
from ansible.module_utils._text import to_native
from ansible.module_utils.common.text.formatters import bytes_to_human
from ansible_collections.community.vmware.plugins.module_utils.vmware import (
    PyVmomi,
    find_obj,
    ansible_date_time_facts
)
from ansible_collections.community.vmware.plugins.module_utils._argument_spec import base_argument_spec

try:
    from pyVmomi import vim, vmodl
except ImportError:
    pass

from ansible_collections.community.vmware.plugins.module_utils.vmware_rest_client import VmwareRestClient


class VMwareHostFactManager(PyVmomi):
    def __init__(self, module):
        super(VMwareHostFactManager, self).__init__(module)
        esxi_host_name = self.params.get('esxi_hostname', None)
        if self.is_vcenter():
            if esxi_host_name is None:
                self.module.fail_json(msg="Connected to a vCenter system without specifying esxi_hostname")
            self.host = self.get_all_host_objs(esxi_host_name=esxi_host_name)
            if len(self.host) > 1:
                self.module.fail_json(msg="esxi_hostname matched multiple hosts")
            self.host = self.host[0]
            self.esxi_time = None
        else:
            self.host = find_obj(self.content, [vim.HostSystem], None)
            self.esxi_time = self.si.CurrentTime()

        if self.host is None:
            self.module.fail_json(msg="Failed to find host system.")

    def all_facts(self):
        ansible_facts = {}
        ansible_facts.update(self.get_cpu_facts())
        ansible_facts.update(self.get_memory_facts())
        ansible_facts.update(self.get_datastore_facts())
        ansible_facts.update(self.get_network_facts())
        ansible_facts.update(self.get_system_facts())
        ansible_facts.update(self.get_vsan_facts())
        ansible_facts.update(self.get_cluster_facts())
        ansible_facts.update({'host_date_time': ansible_date_time_facts(self.esxi_time)})
        if self.params.get('show_datacenter'):
            ansible_facts.update(self.get_datacenter_facts())
        if self.params.get('show_tag'):
            vmware_client = VmwareRestClient(self.module)
            tag_info = {
                'tags': vmware_client.get_tags_for_hostsystem(hostsystem_mid=self.host._moId)
            }
            ansible_facts.update(tag_info)

        self.module.exit_json(changed=False, ansible_facts=ansible_facts)

    def get_cluster_facts(self):
        cluster_facts = {'cluster': None}
        if self.host.parent and isinstance(self.host.parent, vim.ClusterComputeResource):
            cluster_facts.update(cluster=self.host.parent.name)
        return cluster_facts

    def get_datacenter_facts(self):
        datatacenter_facts = {'datacenter': None}

        parent = self.host.parent
        while parent:
            if isinstance(parent, vim.Datacenter):
                datatacenter_facts.update(datacenter=parent.name)
                break
            parent = parent.parent

        return datatacenter_facts

    def get_vsan_facts(self):
        config_mgr = self.host.configManager.vsanSystem
        ret = {
            'vsan_cluster_uuid': None,
            'vsan_node_uuid': None,
            'vsan_health': "unknown",
        }

        if config_mgr is None:
            return ret

        try:
            status = config_mgr.QueryHostStatus()
        except (vmodl.fault.HostNotConnected, vmodl.fault.HostNotReachable):
            return {
                'vsan_cluster_uuid': 'NA',
                'vsan_node_uuid': 'NA',
                'vsan_health': 'NA',
            }
        except Exception as err:
            self.module.fail_json(msg="Unable to query VSAN status due to %s" % to_native(err))

        return {
            'vsan_cluster_uuid': status.uuid,
            'vsan_node_uuid': status.nodeUuid,
            'vsan_health': status.health,
        }

    def get_cpu_facts(self):
        return {
            'ansible_processor': self.host.summary.hardware.cpuModel,
            'ansible_processor_cores': self.host.summary.hardware.numCpuCores,
            'ansible_processor_count': self.host.summary.hardware.numCpuPkgs,
            'ansible_processor_vcpus': self.host.summary.hardware.numCpuThreads,
        }

    def get_memory_facts(self):
        memory_size = self.host.hardware.memorySize
        overall_memory = 0
        if self.host.summary.quickStats.overallMemoryUsage:
            overall_memory = self.host.summary.quickStats.overallMemoryUsage
        memory_total = memory_size // 1024 // 1024
        return {
            'ansible_memfree_mb': memory_total - overall_memory,
            'ansible_memtotal_mb': memory_total,
        }

    def get_datastore_facts(self):
        facts = dict()
        facts['ansible_datastore'] = []
        for store in self.host.datastore:
            _tmp = {
                'name': store.summary.name,
                'total': bytes_to_human(store.summary.capacity),
                'free': bytes_to_human(store.summary.freeSpace),
            }
            facts['ansible_datastore'].append(_tmp)
        return facts

    def get_network_facts(self):
        facts = dict()
        facts['ansible_interfaces'] = []
        facts['ansible_all_ipv4_addresses'] = []
        for nic in self.host.config.network.vnic:
            device = nic.device
            facts['ansible_interfaces'].append(device)
            facts['ansible_all_ipv4_addresses'].append(nic.spec.ip.ipAddress)
            _tmp = {
                'device': device,
                'ipv4': {
                    'address': nic.spec.ip.ipAddress,
                    'netmask': nic.spec.ip.subnetMask,
                },
                'macaddress': nic.spec.mac,
                'mtu': nic.spec.mtu,
            }
            facts['ansible_' + device] = _tmp
        return facts

    def get_system_facts(self):
        sn = 'NA'
        for info in self.host.hardware.systemInfo.otherIdentifyingInfo:
            if info.identifierType.key == 'ServiceTag':
                sn = info.identifierValue
        facts = {
            'ansible_host_connection_state': self.host.runtime.connectionState,
            'ansible_distribution': self.host.config.product.name,
            'ansible_distribution_version': self.host.config.product.version,
            'ansible_distribution_build': self.host.config.product.build,
            'ansible_os_type': self.host.config.product.osType,
            'ansible_system_vendor': self.host.hardware.systemInfo.vendor,
            'ansible_hostname': self.host.summary.config.name,
            'ansible_product_name': self.host.hardware.systemInfo.model,
            'ansible_product_serial': sn,
            'ansible_bios_date': self.host.hardware.biosInfo.releaseDate,
            'ansible_bios_version': self.host.hardware.biosInfo.biosVersion,
            'ansible_uptime': self.host.summary.quickStats.uptime,
            'ansible_in_maintenance_mode': self.host.runtime.inMaintenanceMode,
            'ansible_uuid': self.host.hardware.systemInfo.uuid,
        }
        return facts

    def properties_facts(self):
        ansible_facts = self.to_json(self.host, self.params.get('properties'))
        if self.params.get('show_tag'):
            vmware_client = VmwareRestClient(self.module)
            tag_info = {
                'tags': vmware_client.get_tags_for_hostsystem(hostsystem_mid=self.host._moId)
            }
            ansible_facts.update(tag_info)

        self.module.exit_json(changed=False, ansible_facts=ansible_facts)


def main():
    argument_spec = base_argument_spec()
    argument_spec.update(
        esxi_hostname=dict(type='str', required=False),
        show_tag=dict(type='bool', default=False),
        show_datacenter=dict(type='bool', default=False),
        schema=dict(type='str', choices=['summary', 'vsphere'], default='summary'),
        properties=dict(type='list', elements='str')
    )
    module = AnsibleModule(argument_spec=argument_spec,
                           supports_check_mode=True)

    vm_host_manager = VMwareHostFactManager(module)

    if module.params['schema'] == 'summary':
        vm_host_manager.all_facts()
    else:
        vm_host_manager.properties_facts()


if __name__ == '__main__':
    main()