#!/usr/bin/python
# Copyright (c) 2017, 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 annotations

DOCUMENTATION = r"""
module: ipa_hbacrule
author: Thomas Krahn (@Nosmoht)
short_description: Manage FreeIPA HBAC rule
description:
  - Add, modify or delete an IPA HBAC rule using IPA API.
attributes:
  check_mode:
    support: full
  diff_mode:
    support: none
options:
  cn:
    description:
      - Canonical name.
      - Can not be changed as it is the unique identifier.
    required: true
    aliases: ["name"]
    type: str
  description:
    description: Description.
    type: str
  host:
    description:
      - List of host names to assign.
      - If an empty list is passed all hosts are removed from the rule.
      - If option is omitted hosts are not checked or changed.
    type: list
    elements: str
  hostcategory:
    description: Host category.
    choices: ['all']
    type: str
  hostgroup:
    description:
      - List of hostgroup names to assign.
      - If an empty list is passed all hostgroups are removed from the rule.
      - If option is omitted hostgroups are not checked or changed.
    type: list
    elements: str
  service:
    description:
      - List of service names to assign.
      - If an empty list is passed all services are removed from the rule.
      - If option is omitted services are not checked or changed.
    type: list
    elements: str
  servicecategory:
    description: Service category.
    choices: ['all']
    type: str
  servicegroup:
    description:
      - List of service group names to assign.
      - If an empty list is passed all assigned service groups are removed from the rule.
      - If option is omitted service groups are not checked or changed.
    type: list
    elements: str
  sourcehost:
    description:
      - List of source host names to assign.
      - If an empty list if passed all assigned source hosts are removed from the rule.
      - If option is omitted source hosts are not checked or changed.
    type: list
    elements: str
  sourcehostcategory:
    description: Source host category.
    choices: ['all']
    type: str
  sourcehostgroup:
    description:
      - List of source host group names to assign.
      - If an empty list if passed all assigned source host groups are removed from the rule.
      - If option is omitted source host groups are not checked or changed.
    type: list
    elements: str
  state:
    description: State to ensure.
    default: "present"
    choices: ["absent", "disabled", "enabled", "present"]
    type: str
  user:
    description:
      - List of user names to assign.
      - If an empty list if passed all assigned users are removed from the rule.
      - If option is omitted users are not checked or changed.
    type: list
    elements: str
  usercategory:
    description: User category.
    choices: ['all']
    type: str
  usergroup:
    description:
      - List of user group names to assign.
      - If an empty list if passed all assigned user groups are removed from the rule.
      - If option is omitted user groups are not checked or changed.
    type: list
    elements: str
extends_documentation_fragment:
  - community.general.ipa.documentation
  - community.general.ipa.connection_notes
  - community.general.attributes
"""

EXAMPLES = r"""
- name: Ensure rule to allow all users to access any host from any host
  community.general.ipa_hbacrule:
    name: allow_all
    description: Allow all users to access any host from any host
    hostcategory: all
    servicecategory: all
    usercategory: all
    state: present
    ipa_host: ipa.example.com
    ipa_user: admin
    ipa_pass: topsecret

- name: Ensure rule with certain limitations
  community.general.ipa_hbacrule:
    name: allow_all_developers_access_to_db
    description: Allow all developers to access any database from any host
    hostgroup:
      - db-server
    usergroup:
      - developers
    state: present
    ipa_host: ipa.example.com
    ipa_user: admin
    ipa_pass: topsecret

- name: Ensure rule is absent
  community.general.ipa_hbacrule:
    name: rule_to_be_deleted
    state: absent
    ipa_host: ipa.example.com
    ipa_user: admin
    ipa_pass: topsecret
"""

RETURN = r"""
hbacrule:
  description: HBAC rule as returned by IPA API.
  returned: always
  type: dict
"""

import traceback

from ansible.module_utils.basic import AnsibleModule

from ansible_collections.community.general.plugins.module_utils.ipa import IPAClient, ipa_argument_spec
from ansible_collections.community.general.plugins.module_utils.version import LooseVersion


class HBACRuleIPAClient(IPAClient):
    def __init__(self, module, host, port, protocol):
        super().__init__(module, host, port, protocol)

    def hbacrule_find(self, name):
        return self._post_json(method="hbacrule_find", name=None, item={"all": True, "cn": name})

    def hbacrule_add(self, name, item):
        return self._post_json(method="hbacrule_add", name=name, item=item)

    def hbacrule_mod(self, name, item):
        return self._post_json(method="hbacrule_mod", name=name, item=item)

    def hbacrule_del(self, name):
        return self._post_json(method="hbacrule_del", name=name)

    def hbacrule_add_host(self, name, item):
        return self._post_json(method="hbacrule_add_host", name=name, item=item)

    def hbacrule_remove_host(self, name, item):
        return self._post_json(method="hbacrule_remove_host", name=name, item=item)

    def hbacrule_add_service(self, name, item):
        return self._post_json(method="hbacrule_add_service", name=name, item=item)

    def hbacrule_remove_service(self, name, item):
        return self._post_json(method="hbacrule_remove_service", name=name, item=item)

    def hbacrule_add_user(self, name, item):
        return self._post_json(method="hbacrule_add_user", name=name, item=item)

    def hbacrule_remove_user(self, name, item):
        return self._post_json(method="hbacrule_remove_user", name=name, item=item)

    def hbacrule_add_sourcehost(self, name, item):
        return self._post_json(method="hbacrule_add_sourcehost", name=name, item=item)

    def hbacrule_remove_sourcehost(self, name, item):
        return self._post_json(method="hbacrule_remove_sourcehost", name=name, item=item)


def get_hbacrule_dict(
    description=None,
    hostcategory=None,
    ipaenabledflag=None,
    servicecategory=None,
    sourcehostcategory=None,
    usercategory=None,
):
    data = {}
    if description is not None:
        data["description"] = description
    if hostcategory is not None:
        data["hostcategory"] = hostcategory
    if ipaenabledflag is not None:
        data["ipaenabledflag"] = ipaenabledflag
    if servicecategory is not None:
        data["servicecategory"] = servicecategory
    if sourcehostcategory is not None:
        data["sourcehostcategory"] = sourcehostcategory
    if usercategory is not None:
        data["usercategory"] = usercategory
    return data


def get_hbcarule_diff(client, ipa_hbcarule, module_hbcarule):
    return client.get_diff(ipa_data=ipa_hbcarule, module_data=module_hbcarule)


def ensure(module, client):
    name = module.params["cn"]
    state = module.params["state"]

    ipa_version = client.get_ipa_version()
    if state in ["present", "enabled"]:
        if LooseVersion(ipa_version) < LooseVersion("4.9.10"):
            ipaenabledflag = "TRUE"
        else:
            ipaenabledflag = True
    else:
        if LooseVersion(ipa_version) < LooseVersion("4.9.10"):
            ipaenabledflag = "FALSE"
        else:
            ipaenabledflag = False

    host = module.params["host"]
    hostcategory = module.params["hostcategory"]
    hostgroup = module.params["hostgroup"]
    service = module.params["service"]
    servicecategory = module.params["servicecategory"]
    servicegroup = module.params["servicegroup"]
    sourcehost = module.params["sourcehost"]
    sourcehostcategory = module.params["sourcehostcategory"]
    sourcehostgroup = module.params["sourcehostgroup"]
    user = module.params["user"]
    usercategory = module.params["usercategory"]
    usergroup = module.params["usergroup"]

    module_hbacrule = get_hbacrule_dict(
        description=module.params["description"],
        hostcategory=hostcategory,
        ipaenabledflag=ipaenabledflag,
        servicecategory=servicecategory,
        sourcehostcategory=sourcehostcategory,
        usercategory=usercategory,
    )
    ipa_hbacrule = client.hbacrule_find(name=name)

    changed = False
    if state in ["present", "enabled", "disabled"]:
        if not ipa_hbacrule:
            changed = True
            if not module.check_mode:
                ipa_hbacrule = client.hbacrule_add(name=name, item=module_hbacrule)
        else:
            diff = get_hbcarule_diff(client, ipa_hbacrule, module_hbacrule)
            if len(diff) > 0:
                changed = True
                if not module.check_mode:
                    data = {}
                    for key in diff:
                        data[key] = module_hbacrule.get(key)
                    client.hbacrule_mod(name=name, item=data)

        if host is not None:
            changed = (
                client.modify_if_diff(
                    name,
                    ipa_hbacrule.get("memberhost_host", []),
                    host,
                    client.hbacrule_add_host,
                    client.hbacrule_remove_host,
                    "host",
                )
                or changed
            )

        if hostgroup is not None:
            changed = (
                client.modify_if_diff(
                    name,
                    ipa_hbacrule.get("memberhost_hostgroup", []),
                    hostgroup,
                    client.hbacrule_add_host,
                    client.hbacrule_remove_host,
                    "hostgroup",
                )
                or changed
            )

        if service is not None:
            changed = (
                client.modify_if_diff(
                    name,
                    ipa_hbacrule.get("memberservice_hbacsvc", []),
                    service,
                    client.hbacrule_add_service,
                    client.hbacrule_remove_service,
                    "hbacsvc",
                )
                or changed
            )

        if servicegroup is not None:
            changed = (
                client.modify_if_diff(
                    name,
                    ipa_hbacrule.get("memberservice_hbacsvcgroup", []),
                    servicegroup,
                    client.hbacrule_add_service,
                    client.hbacrule_remove_service,
                    "hbacsvcgroup",
                )
                or changed
            )

        if sourcehost is not None:
            changed = (
                client.modify_if_diff(
                    name,
                    ipa_hbacrule.get("sourcehost_host", []),
                    sourcehost,
                    client.hbacrule_add_sourcehost,
                    client.hbacrule_remove_sourcehost,
                    "host",
                )
                or changed
            )

        if sourcehostgroup is not None:
            changed = (
                client.modify_if_diff(
                    name,
                    ipa_hbacrule.get("sourcehost_group", []),
                    sourcehostgroup,
                    client.hbacrule_add_sourcehost,
                    client.hbacrule_remove_sourcehost,
                    "hostgroup",
                )
                or changed
            )

        if user is not None:
            changed = (
                client.modify_if_diff(
                    name,
                    ipa_hbacrule.get("memberuser_user", []),
                    user,
                    client.hbacrule_add_user,
                    client.hbacrule_remove_user,
                    "user",
                )
                or changed
            )

        if usergroup is not None:
            changed = (
                client.modify_if_diff(
                    name,
                    ipa_hbacrule.get("memberuser_group", []),
                    usergroup,
                    client.hbacrule_add_user,
                    client.hbacrule_remove_user,
                    "group",
                )
                or changed
            )
    else:
        if ipa_hbacrule:
            changed = True
            if not module.check_mode:
                client.hbacrule_del(name=name)

    return changed, client.hbacrule_find(name=name)


def main():
    argument_spec = ipa_argument_spec()
    argument_spec.update(
        cn=dict(type="str", required=True, aliases=["name"]),
        description=dict(type="str"),
        host=dict(type="list", elements="str"),
        hostcategory=dict(type="str", choices=["all"]),
        hostgroup=dict(type="list", elements="str"),
        service=dict(type="list", elements="str"),
        servicecategory=dict(type="str", choices=["all"]),
        servicegroup=dict(type="list", elements="str"),
        sourcehost=dict(type="list", elements="str"),
        sourcehostcategory=dict(type="str", choices=["all"]),
        sourcehostgroup=dict(type="list", elements="str"),
        state=dict(type="str", default="present", choices=["present", "absent", "enabled", "disabled"]),
        user=dict(type="list", elements="str"),
        usercategory=dict(type="str", choices=["all"]),
        usergroup=dict(type="list", elements="str"),
    )

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

    client = HBACRuleIPAClient(
        module=module,
        host=module.params["ipa_host"],
        port=module.params["ipa_port"],
        protocol=module.params["ipa_prot"],
    )

    try:
        client.login(username=module.params["ipa_user"], password=module.params["ipa_pass"])
        changed, hbacrule = ensure(module, client)
        module.exit_json(changed=changed, hbacrule=hbacrule)
    except Exception as e:
        module.fail_json(msg=f"{e}", exception=traceback.format_exc())


if __name__ == "__main__":
    main()