---

# This will throw a Permission Denied error if already mounted using fuse
- name: Check Synapse media store path
  stat:
    path: "{{ matrix_synapse_media_store_path }}"
  register: local_path_media_store_stat
  ignore_errors: true

# This is separate and conditional, to ensure we don't execute it
# if the path already exists or we failed to check, because it's mounted using fuse.
- name: Ensure Synapse media store path exists
  file:
    path: "{{ matrix_synapse_media_store_path }}"
    state: directory
    mode: 0750
    owner: "{{ matrix_user_username }}"
    group: "{{ matrix_user_groupname }}"
  when: "not local_path_media_store_stat.failed and not local_path_media_store_stat.stat.exists"

- block:
    - name: Ensure Synapse repository is present on self-build
      git:
        repo: "{{ matrix_synapse_container_image_self_build_repo }}"
        dest: "{{ matrix_synapse_docker_src_files_path }}"
        version: "{{ matrix_synapse_docker_image.split(':')[1] }}"
        force: "yes"
      become: true
      become_user: "{{ matrix_user_username }}"
      register: matrix_synapse_git_pull_results

    - name: Check if Synapse Docker image exists
      command: "{{ matrix_host_command_docker }} images --quiet --filter 'reference={{ matrix_synapse_docker_image }}'"
      register: matrix_synapse_docker_image_check_result

    # Invoking the `docker build` command here, instead of calling the `docker_image` Ansible module,
    # because the latter does not support BuildKit.
    # See: https://github.com/ansible-collections/community.general/issues/514
    - name: Ensure Synapse Docker image is built
      shell:
        chdir: "{{ matrix_synapse_docker_src_files_path }}"
        cmd: |
          {{ matrix_host_command_docker }} build \
          -t "{{ matrix_synapse_docker_image }}" \
          -f docker/Dockerfile \
          .
      environment:
        DOCKER_BUILDKIT: 1
      when: "matrix_synapse_git_pull_results.changed|bool or matrix_synapse_docker_image_check_result.stdout == ''"
  when: "matrix_synapse_container_image_self_build|bool"

- name: Ensure Synapse Docker image is pulled
  docker_image:
    name: "{{ matrix_synapse_docker_image }}"
    source: "{{ 'pull' if ansible_version.major > 2 or ansible_version.minor > 7 else omit }}"
    force_source: "{{ matrix_synapse_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_synapse_docker_image_force_pull }}"
  when: "not matrix_synapse_container_image_self_build"
  register: result
  retries: "{{ matrix_container_retries_count }}"
  delay: "{{ matrix_container_retries_delay }}"
  until: result is not failed

- name: Check if a Synapse signing key exists
  stat:
    path: "{{ matrix_synapse_config_dir_path }}/{{ matrix_server_fqn_matrix }}.signing.key"
  register: matrix_synapse_signing_key_stat

# We do this so that the signing key would get generated.
#
# This will also generate a default homeserver.yaml configuration file and a log configuration file.
# We don't care about those configuration files, as we replace them with our own anyway (see below).
#
# We don't use the `docker_container` module, because using it with `cap_drop` requires
# a very recent docker-py version, which is not available for a lot of people yet.
- name: Generate initial Synapse config and signing key
  command: |
    docker run
    --rm
    --name=matrix-config
    --user={{ matrix_user_uid }}:{{ matrix_user_gid }}
    --cap-drop=ALL
    --mount type=bind,src={{ matrix_synapse_config_dir_path }},dst=/data
    -e SYNAPSE_CONFIG_PATH=/data/homeserver.yaml
    -e SYNAPSE_SERVER_NAME={{ matrix_server_fqn_matrix }}
    -e SYNAPSE_REPORT_STATS=no
    {{ matrix_synapse_docker_image }}
    generate
  when: "not matrix_synapse_signing_key_stat.stat.exists"

- name: Ensure Synapse homeserver config installed
  copy:
    content: "{{ matrix_synapse_configuration|to_nice_yaml(indent=2, width=999999) }}"
    dest: "{{ matrix_synapse_config_dir_path }}/homeserver.yaml"
    mode: 0644
    owner: "{{ matrix_user_username }}"
    group: "{{ matrix_user_groupname }}"

- name: Ensure Synapse log config installed
  template:
    src: "{{ matrix_synapse_template_synapse_log }}"
    dest: "{{ matrix_synapse_config_dir_path }}/{{ matrix_server_fqn_matrix }}.log.config"
    mode: 0644

- name: Ensure matrix-synapse.service installed
  template:
    src: "{{ role_path }}/templates/synapse/systemd/matrix-synapse.service.j2"
    dest: "{{ matrix_systemd_path }}/matrix-synapse.service"
    mode: 0644
  register: matrix_synapse_systemd_service_result

- name: Ensure systemd reloaded after matrix-synapse.service installation
  service:
    daemon_reload: true
  when: "matrix_synapse_systemd_service_result.changed"

- name: Ensure matrix-synapse-register-user script created
  template:
    src: "{{ role_path }}/templates/synapse/usr-local-bin/matrix-synapse-register-user.j2"
    dest: "{{ matrix_local_bin_path }}/matrix-synapse-register-user"
    mode: 0755

- name: Generate sample prometheus.yml for external scraping
  template:
    src: "{{ role_path }}/templates/synapse/prometheus/external_prometheus.yml.example.j2"
    dest: "{{ matrix_synapse_base_path }}/external_prometheus.yml.example"
    owner: "{{ matrix_user_username }}"
    group: "{{ matrix_user_groupname }}"
    mode: 0644
  when: matrix_synapse_metrics_proxying_enabled|bool
