#!/usr/bin/python

# Copyright (c) 2016, Loic Blot <loic.blot@unix-experience.fr>
# Copyright (c) 2018, Ansible Project
# Sponsored by Infopro Digital. http://www.infopro-digital.com/
# Sponsored by E.T.A.I. http://www.etai.fr/
#
# 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: icinga2_feature

short_description: Manage Icinga2 feature
description:
  - This module can be used to enable or disable an Icinga2 feature.
author: "Loic Blot (@nerzhul)"
extends_documentation_fragment:
  - community.general.attributes
attributes:
  check_mode:
    support: full
  diff_mode:
    support: none
options:
  name:
    type: str
    description:
      - This is the feature name to enable or disable.
    required: true
  state:
    type: str
    description:
      - If set to V(present) and feature is disabled, then feature is enabled.
      - If set to V(present) and feature is already enabled, then nothing is changed.
      - If set to V(absent) and feature is enabled, then feature is disabled.
      - If set to V(absent) and feature is already disabled, then nothing is changed.
    choices: ["present", "absent"]
    default: present
"""

EXAMPLES = r"""
- name: Enable ido-pgsql feature
  community.general.icinga2_feature:
    name: ido-pgsql
    state: present

- name: Disable api feature
  community.general.icinga2_feature:
    name: api
    state: absent
"""

RETURN = r"""
#
"""

import re

from ansible.module_utils.basic import AnsibleModule


class Icinga2FeatureHelper:
    def __init__(self, module):
        self.module = module
        self._icinga2 = module.get_bin_path("icinga2", True)
        self.feature_name = self.module.params["name"]
        self.state = self.module.params["state"]

    def _exec(self, args):
        cmd = [self._icinga2, "feature"]
        rc, out, err = self.module.run_command(cmd + args, check_rc=True)
        return rc, out

    def manage(self):
        rc, out = self._exec(["list"])
        if rc != 0:
            self.module.fail_json(
                msg="Unable to list icinga2 features. Ensure icinga2 is installed and present in binary path."
            )

        # If feature is already in good state, just exit
        if (re.search(f"Disabled features:.* {self.feature_name}[ \n]", out) and self.state == "absent") or (
            re.search(f"Enabled features:.* {self.feature_name}[ \n]", out) and self.state == "present"
        ):
            self.module.exit_json(changed=False)

        if self.module.check_mode:
            self.module.exit_json(changed=True)

        feature_enable_str = "enable" if self.state == "present" else "disable"

        rc, out = self._exec([feature_enable_str, self.feature_name])

        change_applied = False
        if self.state == "present":
            if rc != 0:
                self.module.fail_json(
                    msg=f"Failed to {feature_enable_str} feature {self.feature_name}. icinga2 command returned {out}"
                )

            if re.search("already enabled", out) is None:
                change_applied = True
        else:
            if rc == 0:
                change_applied = True
            # RC is not 0 for this already disabled feature, handle it as no change applied
            elif re.search(f"Cannot disable feature '{self.feature_name}'. Target file .* does not exist", out):
                change_applied = False
            else:
                self.module.fail_json(msg=f"Failed to disable feature. Command returns {out}")

        self.module.exit_json(changed=change_applied)


def main():
    module = AnsibleModule(
        argument_spec=dict(
            name=dict(type="str", required=True),
            state=dict(type="str", choices=["present", "absent"], default="present"),
        ),
        supports_check_mode=True,
    )

    module.run_command_environ_update = dict(LANG="C", LC_ALL="C", LC_MESSAGES="C", LC_CTYPE="C")
    Icinga2FeatureHelper(module).manage()


if __name__ == "__main__":
    main()