#!/usr/bin/python

# Copyright (c) 2020, Andrew Klaus <andrewklaus@gmail.com>
# 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: sysupgrade
short_description: Manage OpenBSD system upgrades
version_added: 1.1.0
description:
  - Manage OpenBSD system upgrades using C(sysupgrade).
extends_documentation_fragment:
  - community.general.attributes
attributes:
  check_mode:
    support: none
  diff_mode:
    support: none
options:
  snapshot:
    description:
      - Apply the latest snapshot.
      - Otherwise release is applied.
    default: false
    type: bool
  force:
    description:
      - Force upgrade (for snapshots only).
    default: false
    type: bool
  keep_files:
    description:
      - Keep the files under C(/home/_sysupgrade).
      - By default, the files are deleted after the upgrade.
    default: false
    type: bool
  fetch_only:
    description:
      - Fetch and verify files and create C(/bsd.upgrade) but do not reboot.
      - Set to V(false) if you want C(sysupgrade) to reboot. This causes the module to fail. See the examples.
    default: true
    type: bool
  installurl:
    description:
      - OpenBSD mirror top-level URL for fetching an upgrade.
      - By default, the mirror URL is pulled from C(/etc/installurl).
    type: str
author:
  - Andrew Klaus (@precurse)
"""

EXAMPLES = r"""
- name: Upgrade to latest release
  community.general.sysupgrade:
  register: sysupgrade

- name: Upgrade to latest snapshot
  community.general.sysupgrade:
    snapshot: true
    installurl: https://cloudflare.cdn.openbsd.org/pub/OpenBSD
  register: sysupgrade

- name: Reboot to apply upgrade if needed
  ansible.builtin.reboot:
  when: sysupgrade.changed

# Note: Ansible will error when running this way due to how
#   the reboot is forcefully handled by sysupgrade:

- name: Have sysupgrade automatically reboot
  community.general.sysupgrade:
    fetch_only: false
  ignore_errors: true
"""


from ansible.module_utils.basic import AnsibleModule


def sysupgrade_run(module):
    sysupgrade_bin = module.get_bin_path("/usr/sbin/sysupgrade", required=True)
    cmd = [sysupgrade_bin]
    changed = False

    # Setup command flags
    if module.params["snapshot"]:
        run_flag = ["-s"]
        if module.params["force"]:
            # Force only applies to snapshots
            run_flag.append("-f")
    else:
        # release flag
        run_flag = ["-r"]

    if module.params["keep_files"]:
        run_flag.append("-k")

    if module.params["fetch_only"]:
        run_flag.append("-n")

    # installurl must be the last argument
    if module.params["installurl"]:
        run_flag.append(module.params["installurl"])

    rc, out, err = module.run_command(cmd + run_flag)

    if rc != 0:
        module.fail_json(msg=f"Command {cmd} failed rc={rc}, out={out}, err={err}")
    elif out.lower().find("already on latest snapshot") >= 0:
        changed = False
    elif out.lower().find("upgrade on next reboot") >= 0:
        changed = True

    return dict(
        changed=changed,
        rc=rc,
        stderr=err,
        stdout=out,
    )


def main():
    module = AnsibleModule(
        argument_spec=dict(
            snapshot=dict(type="bool", default=False),
            fetch_only=dict(type="bool", default=True),
            force=dict(type="bool", default=False),
            keep_files=dict(type="bool", default=False),
            installurl=dict(type="str"),
        ),
        supports_check_mode=False,
    )
    return_dict = sysupgrade_run(module)
    module.exit_json(**return_dict)


if __name__ == "__main__":
    main()