---
# 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.


- name: Create temporary file for hosts
  become: true
  tempfile:
    state: file
    suffix: tmphosts
  register: tripleo_hosts_entries_tmp_hosts
  check_mode: false
  tags:
    - tripleo_hosts_entries

- name: Prepare temporary /etc/hosts
  become: true
  copy:
    remote_src: true
    src: "{{ tripleo_hosts_entries_hosts_path }}"
    dest: "{{ tripleo_hosts_entries_tmp_hosts.path }}"
    mode: preserve
  tags:
    - tripleo_hosts_entries

- name: Remove old Heat hosts configuration (if present)
  become: true
  blockinfile:
    state: absent
    path: "{{ tripleo_hosts_entries_tmp_hosts.path }}"
    block: ""
    marker: "# {mark}"
    marker_begin: "HEAT_HOSTS_START - Do not edit manually within this section!"
    marker_end: "HEAT_HOSTS_END"
  register: tripleo_hosts_entries_heat_marker
  tags:
    - tripleo_hosts_entries

- name: Render out the hosts entries
  run_once: true
  set_fact:
    tripleo_hosts_entries_block: |
      {% for host in groups['allovercloud'] -%}
      {{ hostvars[host][hostvars[host]['hostname_resolve_network'] ~ '_ip'] ~ ' ' ~
         host ~ '.' ~ cloud_domain ~ ' ' ~ host }}
      {# ## NOTE(hjensas): The Undercloud Minion has no networks, need to check for that here. -#}
      {% if hostvars[host]['role_networks'] is not none -%}
      {% set _role_networks = hostvars[host]['role_networks'] | default ([]) -%}
      {% set _networks = (enabled_networks | default([])) | intersect(_role_networks) -%}
      {% for network in _networks -%}
      {{ hostvars[host][networks[network]['name_lower'] ~ '_ip'] ~ ' ' ~
         host ~ '.' ~ network.lower() ~ '.' ~ cloud_domain ~ ' ' ~
         host ~ '.' ~ network.lower() }}
      {% endfor -%}
      {% endif -%}
      {{ hostvars[host]['ctlplane_ip'] ~ ' ' ~
         host ~ '.ctlplane' ~ '.' ~ cloud_domain ~ ' ' ~ host ~ '.ctlplane' }}
      {% endfor %}
  tags:
    - tripleo_hosts_entries

- name: Prepare new /etc/hosts
  become: true
  blockinfile:
    create: true
    path: "{{ tripleo_hosts_entries_tmp_hosts.path }}"
    # BOF denotes the beginning of the file.
    insertbefore: BOF
    block: |
      {{ tripleo_hosts_entries_block }}
      {% for host in tripleo_hosts_entries_undercloud_hosts_entries | default([]) +
          tripleo_hosts_entries_vip_hosts_entries | default([]) +
          tripleo_hosts_entries_extra_hosts_entries | default([]) %}
      {{ host }}
      {% endfor %}
    marker: "# {mark}"
    marker_begin: "START_HOST_ENTRIES_FOR_STACK: {{ tripleo_stack_name | default(plan) }}"
    marker_end: "END_HOST_ENTRIES_FOR_STACK: {{ tripleo_stack_name | default(plan) }}"
  register: tripleo_hosts_entries_new_entries
  tags:
    - tripleo_hosts_entries

- name: Update /etc/hosts contents (if changed)
  become: true
  # cp preserves the inode of the existing file tripleo_hosts_entries_hosts_path
  command: cp "{{ tripleo_hosts_entries_tmp_hosts.path }}" "{{ tripleo_hosts_entries_hosts_path }}"
  when: tripleo_hosts_entries_heat_marker.changed or tripleo_hosts_entries_new_entries.changed
  tags:
    - tripleo_hosts_entries

- name: Clean up temporary hosts file
  become: true
  file:
    path: "{{ tripleo_hosts_entries_tmp_hosts.path }}"
    state: absent
  when: tripleo_hosts_entries_tmp_hosts.path is defined
  tags:
    - tripleo_hosts_entries