# Copyright (c) 2021, Felix Fontein <felix@fontein.de>
# 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 = """
name: a_module
short_description: Test whether a given string refers to an existing module or action plugin
version_added: 4.0.0
author: Felix Fontein (@felixfontein)
description:
  - Test whether a given string refers to an existing module or action plugin.
  - This can be useful in roles, which can use this to ensure that required modules are present ahead of time.
options:
  _input:
    description: A string denoting a fully qualified collection name (FQCN) of a module or action plugin.
    type: string
    required: true
"""

EXAMPLES = """
- name: Make sure that community.aws.route53 is available
  ansible.builtin.assert:
    that:
      - >
        'community.aws.route53' is community.general.a_module

- name: Make sure that community.general.does_not_exist is not a module or action plugin
  ansible.builtin.assert:
    that:
      - "'community.general.does_not_exist' is not community.general.a_module"
"""

RETURN = """
_value:
  description: Whether the module or action plugin denoted by the input exists.
  type: boolean
"""

import typing as t
from collections.abc import Callable

from ansible.errors import AnsibleFilterError
from ansible.plugins.loader import action_loader, module_loader

try:
    from ansible.errors import AnsiblePluginRemovedError
except ImportError:
    AnsiblePluginRemovedError = Exception  # type: ignore


def a_module(term: t.Any) -> bool:
    """
    Example:
      - 'community.general.ufw' is community.general.a_module
      - 'community.general.does_not_exist' is not community.general.a_module
    """
    if not isinstance(term, str):
        raise AnsibleFilterError(f"Parameter must be a string, got {term!r} of type {type(term)}")
    try:
        for loader in (action_loader, module_loader):
            data = loader.find_plugin(term)
            if data is not None:
                return True
        return False
    except AnsiblePluginRemovedError:
        return False


class TestModule:
    """Ansible jinja2 tests"""

    def tests(self) -> dict[str, Callable]:
        return {
            "a_module": a_module,
        }
