---

#
# Tasks related to setting up an internal redis server
#

- name: Ensure redis Docker image is pulled
  docker_image:
    name: "{{ matrix_redis_docker_image_to_use }}"
    source: "{{ 'pull' if ansible_version.major > 2 or ansible_version.minor > 7 else omit }}"
    force_source: "{{ matrix_redis_docker_image_force_pull if ansible_version.major > 2 or ansible_version.minor >= 8 else omit }}"
    force: "{{ omit if ansible_version.major > 2 or ansible_version.minor >= 8 else matrix_redis_docker_image_force_pull }}"
  when: matrix_redis_enabled|bool

- name: Ensure redis paths exist
  file:
    path: "{{ item }}"
    state: directory
    mode: 0700
    owner: "{{ matrix_user_username }}"
    group: "{{ matrix_user_username }}"
  with_items:
    - "{{ matrix_redis_base_path }}"
    - "{{ matrix_redis_data_path }}"
  when: matrix_redis_enabled|bool

# We do this as a separate task, because:
# - we'd like to do it for the data path only, not for the base path (which contains root-owned environment variable files we'd like to leave as-is)
# - we need to do it without `mode`, or we risk making certain `.conf` and other files's executable bit to flip to true
- name: Ensure redis data path ownership is correct
  file:
    path: "{{ matrix_redis_data_path }}"
    state: directory
    owner: "{{ matrix_user_username }}"
    group: "{{ matrix_user_username }}"
    recurse: yes
  when: matrix_redis_enabled|bool

- name: Ensure redis environment variables file created
  template:
    src: "{{ role_path }}/templates/{{ item }}.j2"
    dest: "{{ matrix_redis_base_path }}/{{ item }}"
    mode: 0644
  with_items:
    - "redis.conf"
  when: matrix_redis_enabled|bool

- name: Ensure matrix-redis.service installed
  template:
    src: "{{ role_path }}/templates/systemd/matrix-redis.service.j2"
    dest: "{{ matrix_systemd_path }}/matrix-redis.service"
    mode: 0644
  register: matrix_redis_systemd_service_result
  when: matrix_redis_enabled|bool

- name: Ensure systemd reloaded after matrix-redis.service installation
  service:
    daemon_reload: yes
  when: "matrix_redis_enabled|bool and matrix_redis_systemd_service_result.changed"

#
# Tasks related to getting rid of the internal redis server (if it was previously enabled)
#

- name: Check existence of matrix-redis service
  stat:
    path: "{{ matrix_systemd_path }}/matrix-redis.service"
  register: matrix_redis_service_stat
  when: "not matrix_redis_enabled|bool"

- name: Ensure matrix-redis is stopped
  service:
    name: matrix-redis
    state: stopped
    enabled: no
    daemon_reload: yes
  when: "not matrix_redis_enabled|bool and matrix_redis_service_stat.stat.exists"

- name: Ensure matrix-redis.service doesn't exist
  file:
    path: "{{ matrix_systemd_path }}/matrix-redis.service"
    state: absent
  when: "not matrix_redis_enabled|bool and matrix_redis_service_stat.stat.exists"

- name: Ensure systemd reloaded after matrix-redis.service removal
  service:
    daemon_reload: yes
  when: "not matrix_redis_enabled|bool and matrix_redis_service_stat.stat.exists"

- name: Check existence of matrix-redis local data path
  stat:
    path: "{{ matrix_redis_data_path }}"
  register: matrix_redis_data_path_stat
  when: "not matrix_redis_enabled|bool"

# We just want to notify the user. Deleting data is too destructive.
- name: Notify if matrix-redis local data remains
  debug:
    msg: "Note: You are not using a local redis instance, but some old data remains from before in `{{ matrix_redis_data_path }}`. Feel free to delete it."
  when: "not matrix_redis_enabled|bool and matrix_redis_data_path_stat.stat.exists"