#!/usr/bin/python

# (c) 2021, NetApp, Inc
# 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': 'certified'}

DOCUMENTATION = """
module: na_ontap_cifs_local_group_member
short_description: NetApp Ontap - Add or remove CIFS local group member
extends_documentation_fragment:
    - netapp.ontap.netapp.na_ontap
version_added: '21.2.0'
author: NetApp Ansible Team (@carchi8py) <ng-ansibleteam@netapp.com>
description:
- Add or remove CIFS local group member
options:
  state:
    description:
    - Whether the specified member should be part of the CIFS local group
    choices: ['present', 'absent']
    default: present
    type: str

  vserver:
    description:
    - Specifies the vserver that owns the CIFS local group
    required: true
    type: str

  group:
    description:
    - Specifies name of the CIFS local group
    required: true
    type: str

  member:
    description:
    - Specifies the name of the member
    required: true
    type: str
"""

EXAMPLES = """
    - name: Add member to CIFS local group
      na_ontap_cifs_local_group_member:
        state: present
        vserver: svm1
        group: BUILTIN\\administrators
        member: DOMAIN\\Domain Admins
        hostname: "{{ hostname }}"
        username: "{{ username }}"
        password: "{{ password }}"
        ontapi: "{{ ontap_facts.ontap_version }}"
        https: true
        validate_certs: false

    - name: Remove member from CIFS local group
      na_ontap_cifs_local_group_member:
        state: absent
        vserver: svm1
        group: BUILTIN\\administrators
        member: DOMAIN\\Domain Admins
        hostname: "{{ hostname }}"
        username: "{{ username }}"
        password: "{{ password }}"
        ontapi: "{{ ontap_facts.ontap_version }}"
        https: true
        validate_certs: false
"""

RETURN = """

"""

import traceback

from ansible.module_utils.basic import AnsibleModule
from ansible.module_utils._text import to_native
import ansible_collections.netapp.ontap.plugins.module_utils.netapp as netapp_utils
from ansible_collections.netapp.ontap.plugins.module_utils.netapp_module import NetAppModule
from ansible_collections.netapp.ontap.plugins.module_utils.netapp import OntapRestAPI

HAS_NETAPP_LIB = netapp_utils.has_netapp_lib()


class NetAppOntapCifsLocalGroupMember(object):
    """
        Add or remove CIFS local group members
    """
    def __init__(self):
        """
            Initialize the Ontap CifsLocalGroupMember class
        """

        self.argument_spec = netapp_utils.na_ontap_host_argument_spec()
        self.argument_spec.update(dict(
            state=dict(required=False, choices=['present', 'absent'], default='present'),
            vserver=dict(required=True, type='str'),
            group=dict(required=True, type='str'),
            member=dict(required=True, type='str')
        ))

        self.module = AnsibleModule(
            argument_spec=self.argument_spec,
            supports_check_mode=True
        )

        # set up variables
        self.na_helper = NetAppModule()
        self.parameters = self.na_helper.set_parameters(self.module.params)

        self.rest_api = OntapRestAPI(self.module)
        self.use_rest = self.rest_api.is_rest()

        if not self.use_rest:
            if HAS_NETAPP_LIB is False:
                self.module.fail_json(msg="the python NetApp-Lib module is required")
            else:
                self.server = netapp_utils.setup_na_ontap_zapi(module=self.module, vserver=self.parameters['vserver'])

    def get_cifs_local_group_member(self):
        return_value = None

        if self.use_rest:
            api = "private/cli/vserver/cifs/users-and-groups/local-group/members"
            query = {
                'group-name': self.parameters['group'],
                'fields': 'member',
                'vserver': self.parameters['vserver'],
                'member': self.parameters['member']
            }
            message, error = self.rest_api.get(api, query)

            if error:
                self.module.fail_json(msg=error)
            if len(message.keys()) == 0:
                return None
            elif 'records' in message and len(message['records']) == 0:
                return None
            elif 'records' not in message:
                error = "Unexpected response in get_cifs_local_group_member from %s: %s" % (api, repr(message))
                self.module.fail_json(msg=error)
            return_value = {
                'group': message['records'][0]['group_name'],
                'member': message['records'][0]['member'],
                'vserver': message['records'][0]['vserver']
            }
            return return_value

        else:
            group_members_get_iter = netapp_utils.zapi.NaElement('cifs-local-group-members-get-iter')
            group_members_info = netapp_utils.zapi.NaElement('cifs-local-group-members')
            group_members_info.add_new_child('group-name', self.parameters['group'])
            group_members_info.add_new_child('vserver', self.parameters['vserver'])
            group_members_info.add_new_child('member', self.parameters['member'])
            query = netapp_utils.zapi.NaElement('query')
            query.add_child_elem(group_members_info)
            group_members_get_iter.add_child_elem(query)

            try:
                result = self.server.invoke_successfully(group_members_get_iter, True)
                if result.get_child_by_name('attributes-list'):
                    group_member_policy_attributes = result['attributes-list']['cifs-local-group-members']

                    return_value = {
                        'group': group_member_policy_attributes['group-name'],
                        'member': group_member_policy_attributes['member'],
                        'vserver': group_member_policy_attributes['vserver']
                    }

            except netapp_utils.zapi.NaApiError as error:
                self.module.fail_json(
                    msg='Error getting CIFS local group members for group %s on vserver %s: %s' %
                    (self.parameters['group'], self.parameters['vserver'], to_native(error)), exception=traceback.format_exc()
                )

            return return_value

    def add_cifs_local_group_member(self):
        """
        Adds a member to a CIFS local group
        """
        if self.use_rest:
            api = "private/cli/vserver/cifs/users-and-groups/local-group/add-members"
            body = {
                "vserver": self.parameters['vserver'],
                "group-name": self.parameters['group'],
                "member-names": [self.parameters['member']]
            }
            dummy, error = self.rest_api.post(api, body)
            if error:
                self.module.fail_json(msg=error)

        else:
            group_members_obj = netapp_utils.zapi.NaElement("cifs-local-group-members-add-members")
            group_members_obj.add_new_child("group-name", self.parameters['group'])
            member_names = netapp_utils.zapi.NaElement("member-names")
            member_names.add_new_child('cifs-name', self.parameters['member'])
            group_members_obj.add_child_elem(member_names)

            try:
                self.server.invoke_successfully(group_members_obj, True)
            except netapp_utils.zapi.NaApiError as error:
                self.module.fail_json(
                    msg='Error adding member %s to cifs local group %s on vserver %s: %s' %
                    (self.parameters['member'], self.parameters['group'], self.parameters['vserver'], to_native(error)), exception=traceback.format_exc()
                )

    def remove_cifs_local_group_member(self):
        """
        Removes a member from a CIFS local group
        """
        if self.use_rest:
            api = "private/cli/vserver/cifs/users-and-groups/local-group/remove-members"
            body = {
                "vserver": self.parameters['vserver'],
                "group-name": self.parameters['group'],
                "member-names": [self.parameters['member']]
            }

            dummy, error = self.rest_api.post(api, body)
            if error:
                self.module.fail_json(msg=error)

        else:
            group_members_obj = netapp_utils.zapi.NaElement("cifs-local-group-members-remove-members")
            group_members_obj.add_new_child("group-name", self.parameters['group'])
            member_names = netapp_utils.zapi.NaElement("member-names")
            member_names.add_new_child('cifs-name', self.parameters['member'])
            group_members_obj.add_child_elem(member_names)

            try:
                self.server.invoke_successfully(group_members_obj, True)
            except netapp_utils.zapi.NaApiError as error:
                self.module.fail_json(
                    msg='Error removing member %s from cifs local group %s on vserver %s: %s' %
                    (self.parameters['member'], self.parameters['group'], self.parameters['vserver'], to_native(error)), exception=traceback.format_exc()
                )

    def apply(self):
        if not self.use_rest:
            netapp_utils.ems_log_event("na_ontap_cifs_local_group_member", self.server)

        current = self.get_cifs_local_group_member()

        cd_action = self.na_helper.get_cd_action(current, self.parameters)

        if self.na_helper.changed:
            if not self.module.check_mode:
                if cd_action == 'create':
                    self.add_cifs_local_group_member()
                elif cd_action == 'delete':
                    self.remove_cifs_local_group_member()
        self.module.exit_json(changed=self.na_helper.changed)


def main():
    """
    Creates the NetApp Ontap Cifs Local Group Member object and runs the correct play task
    """
    obj = NetAppOntapCifsLocalGroupMember()
    obj.apply()


if __name__ == '__main__':
    main()