#!/usr/bin/python

# -*- coding: utf-8 -*-

# Authors:

#   Thomas Woerner <twoerner@redhat.com>

#

# Copyright (C) 2019 Red Hat

# see file 'COPYING' for use and warranty information

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation, either version 3 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program.  If not, see <http://www.gnu.org/licenses/>.

ANSIBLE_METADATA = {

    "metadata_version": "1.0",

    "supported_by": "community",

    "status": ["preview"],

}

DOCUMENTATION = """

---

module: ipahostgroup

short description: Manage FreeIPA hostgroups

description: Manage FreeIPA hostgroups

options:

  ipaadmin_principal:

    description: The admin principal

    default: admin

  ipaadmin_password:

    description: The admin password

    required: false

  name:

    description: The hostgroup name

    required: false

    aliases: ["cn"]

  description:

    description: The hostgroup description

    required: false

  nomembers:

    description: Suppress processing of membership attributes

    required: false

    type: bool

  host:

    description: List of host names assigned to this hostgroup.

    required: false

    type: list

  hostgroup:

    description: List of hostgroup names assigned to this hostgroup.

    required: false

    type: list

  membermanager_user:

    description:

    - List of member manager users assigned to this hostgroup.

    - Only usable with IPA versions 4.8.4 and up.

    required: false

    type: list

  membermanager_group:

    description:

    - List of member manager groups assigned to this hostgroup.

    - Only usable with IPA versions 4.8.4 and up.

    required: false

    type: list

  action:

    description: Work on hostgroup or member level

    default: hostgroup

    choices: ["member", "hostgroup"]

  state:

    description: State to ensure

    default: present

    choices: ["present", "absent"]

author:

    - Thomas Woerner

"""

EXAMPLES = """

# Ensure host-group databases is present

- ipahostgroup:

    ipaadmin_password: SomeADMINpassword

    name: databases

    host:

    - db.example.com

    hostgroup:

    - mysql-server

    - oracle-server

# Ensure hosts and hostgroups are present in existing databases hostgroup

- ipahostgroup:

    ipaadmin_password: SomeADMINpassword

    name: databases

    host:

    - db.example.com

    hostgroup:

    - mysql-server

    - oracle-server

    action: member

# Ensure hosts and hostgroups are absent in databases hostgroup

- ipahostgroup:

    ipaadmin_password: SomeADMINpassword

    name: databases

    host:

    - db.example.com

    hostgroup:

    - mysql-server

    - oracle-server

    action: member

    state: absent

# Ensure host-group databases is absent

- ipahostgroup:

    ipaadmin_password: SomeADMINpassword

    name: databases

    state: absent

"""

RETURN = """

"""

from ansible.module_utils.basic import AnsibleModule

from ansible.module_utils.ansible_freeipa_module import temp_kinit, \

    temp_kdestroy, valid_creds, api_connect, api_command, compare_args_ipa, \

    module_params_get, gen_add_del_lists, api_check_command

def find_hostgroup(module, name):

    _args = {

        "all": True,

        "cn": name,

    }

    _result = api_command(module, "hostgroup_find", name, _args)

    if len(_result["result"]) > 1:

        module.fail_json(

            msg="There is more than one hostgroup '%s'" % (name))

    elif len(_result["result"]) == 1:

        return _result["result"][0]

    else:

        return None

def gen_args(description, nomembers):

    _args = {}

    if description is not None:

        _args["description"] = description

    if nomembers is not None:

        _args["nomembers"] = nomembers

    return _args

def gen_member_args(host, hostgroup):

    _args = {}

    if host is not None:

        _args["member_host"] = host

    if hostgroup is not None:

        _args["member_hostgroup"] = hostgroup

    return _args

def main():

    ansible_module = AnsibleModule(

        argument_spec=dict(

            # general

            ipaadmin_principal=dict(type="str", default="admin"),

            ipaadmin_password=dict(type="str", required=False, no_log=True),

            name=dict(type="list", aliases=["cn"], default=None,

                      required=True),

            # present

            description=dict(type="str", default=None),

            nomembers=dict(required=False, type='bool', default=None),

            host=dict(required=False, type='list', default=None),

            hostgroup=dict(required=False, type='list', default=None),

            membermanager_user=dict(required=False, type='list', default=None),

            membermanager_group=dict(required=False, type='list',

                                     default=None),

            action=dict(type="str", default="hostgroup",

                        choices=["member", "hostgroup"]),

            # state

            state=dict(type="str", default="present",

                       choices=["present", "absent"]),

        ),

        supports_check_mode=True,

    )

    ansible_module._ansible_debug = True

    # Get parameters

    # general

    ipaadmin_principal = module_params_get(ansible_module,

                                           "ipaadmin_principal")

    ipaadmin_password = module_params_get(ansible_module,

                                          "ipaadmin_password")

    names = module_params_get(ansible_module, "name")

    # present

    description = module_params_get(ansible_module, "description")

    nomembers = module_params_get(ansible_module, "nomembers")

    host = module_params_get(ansible_module, "host")

    hostgroup = module_params_get(ansible_module, "hostgroup")

    membermanager_user = module_params_get(ansible_module,

                                           "membermanager_user")

    membermanager_group = module_params_get(ansible_module,

                                            "membermanager_group")

    action = module_params_get(ansible_module, "action")

    # state

    state = module_params_get(ansible_module, "state")

    # Check parameters

    if state == "present":

        if len(names) != 1:

            ansible_module.fail_json(

                msg="Only one hostgroup can be added at a time.")

        if action == "member":

            invalid = ["description", "nomembers"]

            for x in invalid:

                if vars()[x] is not None:

                    ansible_module.fail_json(

                        msg="Argument '%s' can not be used with action "

                        "'%s'" % (x, action))

    if state == "absent":

        if len(names) < 1:

            ansible_module.fail_json(

                msg="No name given.")

        invalid = ["description", "nomembers"]

        if action == "hostgroup":

            invalid.extend(["host", "hostgroup"])

        for x in invalid:

            if vars()[x] is not None:

                ansible_module.fail_json(

                    msg="Argument '%s' can not be used with state '%s'" %

                    (x, state))

    # Init

    changed = False

    exit_args = {}

    ccache_dir = None

    ccache_name = None

    try:

        if not valid_creds(ansible_module, ipaadmin_principal):

            ccache_dir, ccache_name = temp_kinit(ipaadmin_principal,

                                                 ipaadmin_password)

        api_connect()

        has_add_membermanager = api_check_command(

            "hostgroup_add_member_manager")

        if ((membermanager_user is not None or

             membermanager_group is not None) and not has_add_membermanager):

            ansible_module.fail_json(

                msg="Managing a membermanager user or group is not supported "

                "by your IPA version"

            )

        commands = []

        for name in names:

            # Make sure hostgroup exists

            res_find = find_hostgroup(ansible_module, name)

            # Create command

            if state == "present":

                # Generate args

                args = gen_args(description, nomembers)

                if action == "hostgroup":

                    # Found the hostgroup

                    if res_find is not None:

                        # For all settings is args, check if there are

                        # different settings in the find result.

                        # If yes: modify

                        if not compare_args_ipa(ansible_module, args,

                                                res_find):

                            commands.append([name, "hostgroup_mod", args])

                    else:

                        commands.append([name, "hostgroup_add", args])

                        # Set res_find to empty dict for next step

                        res_find = {}

                    member_args = gen_member_args(host, hostgroup)

                    if not compare_args_ipa(ansible_module, member_args,

                                            res_find):

                        # Generate addition and removal lists

                        host_add, host_del = gen_add_del_lists(

                            host, res_find.get("member_host"))

                        hostgroup_add, hostgroup_del = gen_add_del_lists(

                            hostgroup, res_find.get("member_hostgroup"))

                        # Add members

                        if len(host_add) > 0 or len(hostgroup_add) > 0:

                            commands.append([name, "hostgroup_add_member",

                                             {

                                                 "host": host_add,

                                                 "hostgroup": hostgroup_add,

                                             }])

                        # Remove members

                        if len(host_del) > 0 or len(hostgroup_del) > 0:

                            commands.append([name, "hostgroup_remove_member",

                                             {

                                                 "host": host_del,

                                                 "hostgroup": hostgroup_del,

                                             }])

                    membermanager_user_add, membermanager_user_del = \

                        gen_add_del_lists(

                            membermanager_user,

                            res_find.get("membermanager_user")

                        )

                    membermanager_group_add, membermanager_group_del = \

                        gen_add_del_lists(

                            membermanager_group,

                            res_find.get("membermanager_group")

                        )

                    if has_add_membermanager:

                        # Add membermanager users and groups

                        if len(membermanager_user_add) > 0 or \

                           len(membermanager_group_add) > 0:

                            commands.append(

                                [name, "hostgroup_add_member_manager",

                                 {

                                     "user": membermanager_user_add,

                                     "group": membermanager_group_add,

                                 }]

                            )

                        # Remove member manager

                        if len(membermanager_user_del) > 0 or \

                           len(membermanager_group_del) > 0:

                            commands.append(

                                [name, "hostgroup_remove_member_manager",

                                 {

                                     "user": membermanager_user_del,

                                     "group": membermanager_group_del,

                                 }]

                            )

                elif action == "member":

                    if res_find is None:

                        ansible_module.fail_json(

                            msg="No hostgroup '%s'" % name)

                    # Ensure members are present

                    commands.append([name, "hostgroup_add_member",

                                     {

                                         "host": host,

                                         "hostgroup": hostgroup,

                                     }])

                    if has_add_membermanager:

                        # Add membermanager users and groups

                        if membermanager_user is not None or \

                           membermanager_group is not None:

                            commands.append(

                                [name, "hostgroup_add_member_manager",

                                 {

                                     "user": membermanager_user,

                                     "group": membermanager_group,

                                 }]

                            )

            elif state == "absent":

                if action == "hostgroup":

                    if res_find is not None:

                        commands.append([name, "hostgroup_del", {}])

                elif action == "member":

                    if res_find is None:

                        ansible_module.fail_json(

                            msg="No hostgroup '%s'" % name)

                    # Ensure members are absent

                    commands.append([name, "hostgroup_remove_member",

                                     {

                                         "host": host,

                                         "hostgroup": hostgroup,

                                     }])

                    if has_add_membermanager:

                        # Remove membermanager users and groups

                        if membermanager_user is not None or \

                           membermanager_group is not None:

                            commands.append(

                                [name, "hostgroup_remove_member_manager",

                                 {

                                     "user": membermanager_user,

                                     "group": membermanager_group,

                                 }]

                            )

            else:

                ansible_module.fail_json(msg="Unkown state '%s'" % state)

        # Execute commands

        for name, command, args in commands:

            try:

                result = api_command(ansible_module, command, name, args)

                if "completed" in result:

                    if result["completed"] > 0:

                        changed = True

                else:

                    changed = True

            except Exception as e:

                ansible_module.fail_json(msg="%s: %s: %s" % (command, name,

                                                             str(e)))

            # Get all errors

            # All "already a member" and "not a member" failures in the

            # result are ignored. All others are reported.

            errors = []

            for failed_item in result.get("failed", []):

                failed = result["failed"][failed_item]

                for member_type in failed:

                    for member, failure in failed[member_type]:

                        if "already a member" in failure \

                           or "not a member" in failure:

                            continue

                        errors.append("%s: %s %s: %s" % (

                            command, member_type, member, failure))

            if len(errors) > 0:

                ansible_module.fail_json(msg=", ".join(errors))

    except Exception as e:

        ansible_module.fail_json(msg=str(e))

    finally:

        temp_kdestroy(ccache_dir, ccache_name)

    # Done

    ansible_module.exit_json(changed=changed, **exit_args)

if __name__ == "__main__":

    main()