#!/usr/bin/python

# Copyright (c) 2018, Mikhail Gordeev

# 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: apt_repo
short_description: Manage APT repositories using C(apt-repo)
description:
  - Manages APT repositories using C(apt-repo) tool.
  - See U(https://www.altlinux.org/Apt-repo) for details about C(apt-repo).
notes:
  - This module works on ALT based distros.
  - Does NOT support checkmode, due to a limitation in C(apt-repo) tool.
extends_documentation_fragment:
  - community.general.attributes
attributes:
  check_mode:
    support: none
  diff_mode:
    support: none
options:
  repo:
    description:
      - Name of the repository to add or remove.
    required: true
    type: str
  state:
    description:
      - Indicates the desired repository state.
    choices: [absent, present]
    default: present
    type: str
  remove_others:
    description:
      - Remove other then added repositories.
      - Used if O(state=present).
    type: bool
    default: false
  update:
    description:
      - Update the package database after changing repositories.
    type: bool
    default: false
author:
  - Mikhail Gordeev (@obirvalger)
"""

EXAMPLES = r"""
- name: Remove all repositories
  community.general.apt_repo:
    repo: all
    state: absent

- name: Add repository `Sisysphus` and remove other repositories
  community.general.apt_repo:
    repo: Sisysphus
    state: present
    remove_others: true

- name: Add local repository `/space/ALT/Sisyphus` and update package cache
  community.general.apt_repo:
    repo: copy:///space/ALT/Sisyphus
    state: present
    update: true
"""

RETURN = """ # """

import os

from ansible.module_utils.basic import AnsibleModule

APT_REPO_PATH = "/usr/bin/apt-repo"


def apt_repo(module, *args):
    """run apt-repo with args and return its output"""
    # make args list to use in concatenation
    args = list(args)
    rc, out, err = module.run_command([APT_REPO_PATH] + args)

    if rc != 0:
        module.fail_json(msg=f"'{' '.join(['apt-repo'] + args)}' failed: {err}")

    return out


def add_repo(module, repo):
    """add a repository"""
    apt_repo(module, "add", repo)


def rm_repo(module, repo):
    """remove a repository"""
    apt_repo(module, "rm", repo)


def set_repo(module, repo):
    """add a repository and remove other repositories"""
    # first add to validate repository
    apt_repo(module, "add", repo)
    apt_repo(module, "rm", "all")
    apt_repo(module, "add", repo)


def update(module):
    """update package cache"""
    apt_repo(module, "update")


def main():
    module = AnsibleModule(
        argument_spec=dict(
            repo=dict(type="str", required=True),
            state=dict(type="str", default="present", choices=["absent", "present"]),
            remove_others=dict(type="bool", default=False),
            update=dict(type="bool", default=False),
        ),
    )

    if not os.path.exists(APT_REPO_PATH):
        module.fail_json(msg="cannot find /usr/bin/apt-repo")

    params = module.params
    repo = params["repo"]
    state = params["state"]
    old_repositories = apt_repo(module)

    if state == "present":
        if params["remove_others"]:
            set_repo(module, repo)
        else:
            add_repo(module, repo)
    elif state == "absent":
        rm_repo(module, repo)

    if params["update"]:
        update(module)

    new_repositories = apt_repo(module)
    changed = old_repositories != new_repositories
    module.exit_json(changed=changed, repo=repo, state=state)


if __name__ == "__main__":
    main()