---
# Copyright 2019 Red Hat, Inc.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.

# found within the "vars/" path. If no OS files are found the task will skip.
- name: Gather variables for each operating system
  include_vars: "{{ item }}"
  with_first_found:
    - skip: true
      files:
        - "{{ ansible_distribution | lower }}-{{ ansible_distribution_version | lower }}.yml"
        - "{{ ansible_distribution | lower }}-{{ ansible_distribution_major_version | lower }}.yml"
        - "{{ ansible_os_family | lower }}-{{ ansible_distribution_major_version | lower }}.yml"
        - "{{ ansible_distribution | lower }}.yml"
        - "{{ ansible_os_family | lower }}-{{ ansible_distribution_version.split('.')[0] }}.yml"
        - "{{ ansible_os_family | lower }}.yml"
  tags:
    - always

- name: Run sshd tasks as root
  become: true
  block:
    - name: Install the OpenSSH server
      package:
        name: "{{ tripleo_sshd_packages }}"
        state: "{{ tripleo_sshd_package_state }}"
      register: _sshd_install_result

    # NOTE(mwhahaha): we need this here because in order to validate our generated
    # config, we need to ensure the host keys exists which happens on initial
    # startup
    - name: Start sshd
      systemd:
        name: sshd
        state: restarted
        enabled: true
      when:
        - _sshd_install_result.changed

    - name: PasswordAuthentication notice
      debug:
        msg: >-
          Notice - The option `tripleo_sshd_password_authentication` is set to
          "{{ tripleo_sshd_password_authentication }}" but `PermitRootLogin` is
          undefined. While this may be perfectly valid, the sshd_config options
          should be reviewed to ensure general user access is functional and
          meeting expectations.
      when:
        - (tripleo_sshd_password_authentication != 'no') and
          not ('PermitRootLogin' in tripleo_sshd_server_options)

    - name: PasswordAuthentication duplication notice
      debug:
        msg: >-
          WARNING - The PasswordAuthentication has been configured in
          `tripleo_sshd_server_options` but the values are different.
          The `tripleo_sshd_password_authentication` value will be used.
      when:
        - ('PasswordAuthentication' in tripleo_sshd_server_options and
          tripleo_sshd_password_authentication != tripleo_sshd_server_options['PasswordAuthentication'])

    - name: Motd duplication notice
      debug:
        msg: >-
          WARNING - The Banner or PrintMotd has been configured in
          `tripleo_sshd_server_options`. These options may be ignored and
          configured using values from `tripleo_sshd_banner_enabled` and
          `tripleo_sshd_motd_enabled`
      when:
        - ('Banner' in tripleo_sshd_server_options or 'PrintMotd' in tripleo_sshd_server_options)

    - name: Configure the banner text
      copy:
        content: "{{ tripleo_sshd_banner_text }}"
        dest: /etc/issue
      when:
        - tripleo_sshd_banner_enabled | bool

    - name: Configure the motd banner
      copy:
        content: "{{ tripleo_sshd_message_of_the_day }}"
        dest: /etc/motd
      when:
        - tripleo_sshd_motd_enabled | bool

    - name: Update sshd configuration options from vars
      set_fact:
        tripleo_sshd_server_options: |-
         {% set _ = tripleo_sshd_server_options.__setitem__('PasswordAuthentication', tripleo_sshd_password_authentication) %}
         {% if tripleo_sshd_banner_enabled %}
         {% set _ = tripleo_sshd_server_options.__setitem__('Banner', '/etc/issue') %}
         {% endif %}
         {% if tripleo_sshd_motd_enabled %}
         {% set _ = tripleo_sshd_server_options.__setitem__('PrintMotd', 'yes') %}
         {% endif %}
         {{ tripleo_sshd_server_options }}

    - name: Adjust ssh server configuration
      template:
        dest: /etc/ssh/sshd_config
        src: sshd_config_block.j2
        validate: '/usr/sbin/sshd -T -f %s'
      register: _sshd_config_result

    - name: Restart sshd
      systemd:
        name: sshd
        state: restarted
        enabled: true
      when:
        - _sshd_config_result.changed