---
# See https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/1070
# and https://github.com/spantaleev/matrix-docker-ansible-deploy/commit/1ab507349c752042d26def3e95884f6df8886b74#commitcomment-51108407
- name: Fail if trying to self-build on Ansible < 2.8
  ansible.builtin.fail:
    msg: "To self-build the Mautrix-Facebook image, you should use Ansible 2.8 or higher. See docs/ansible.md"
  when: "ansible_version.major == 2 and ansible_version.minor < 8 and matrix_mautrix_facebook_container_image_self_build and matrix_mautrix_facebook_enabled"

- ansible.builtin.set_fact:
    matrix_systemd_services_list: "{{ matrix_systemd_services_list + ['matrix-mautrix-facebook.service'] }}"
  when: matrix_mautrix_facebook_enabled | bool

# If the matrix-synapse role is not used, these variables may not exist.
- ansible.builtin.set_fact:
    matrix_synapse_container_extra_arguments: >
      {{
        matrix_synapse_container_extra_arguments | default([])
        +
        ["--mount type=bind,src={{ matrix_mautrix_facebook_config_path }}/registration.yaml,dst=/matrix-mautrix-facebook-registration.yaml,ro"]
      }}

    matrix_synapse_app_service_config_files: >
      {{
        matrix_synapse_app_service_config_files | default([])
        +
        ["/matrix-mautrix-facebook-registration.yaml"]
      }}
  when: matrix_mautrix_facebook_enabled | bool

- block:
    - name: Fail if matrix-nginx-proxy role already executed
      ansible.builtin.fail:
        msg: >-
          Trying to append Mautrix Facebook's reverse-proxying configuration to matrix-nginx-proxy,
          but it's pointless since the matrix-nginx-proxy role had already executed.
          To fix this, please change the order of roles in your playbook,
          so that the matrix-nginx-proxy role would run after the matrix-bridge-mautrix-facebook role.
      when: matrix_nginx_proxy_role_executed | default(False) | bool

    - name: Generate Mautrix Facebook proxying configuration for matrix-nginx-proxy
      ansible.builtin.set_fact:
        matrix_mautrix_facebook_matrix_nginx_proxy_configuration: |
          location {{ matrix_mautrix_facebook_public_endpoint }} {
          {% if matrix_nginx_proxy_enabled | default(False) %}
              {# Use the embedded DNS resolver in Docker containers to discover the service #}
              resolver 127.0.0.11 valid=5s;
              set $backend "matrix-mautrix-facebook:29319";
              proxy_pass http://$backend;
          {% else %}
              {# Generic configuration for use outside of our container setup #}
              proxy_pass http://127.0.0.1:9008;
          {% endif %}
          }

    - name: Register Mautrix Facebook proxying configuration with matrix-nginx-proxy
      ansible.builtin.set_fact:
        matrix_nginx_proxy_proxy_matrix_additional_server_configuration_blocks: |
          {{
            matrix_nginx_proxy_proxy_matrix_additional_server_configuration_blocks | default([])
            +
            [matrix_mautrix_facebook_matrix_nginx_proxy_configuration]
          }}

    - name: Warn about reverse-proxying if matrix-nginx-proxy not used
      ansible.builtin.debug:
        msg: >-
          NOTE: You've enabled the Mautrix Facebook bridge but are not using the matrix-nginx-proxy
          reverse proxy.
          Please make sure that you're proxying the `{{ matrix_mautrix_facebook_public_endpoint }}`
          URL endpoint to the matrix-mautrix-facebook container.
          You can expose the container's port using the `matrix_mautrix_facebook_container_http_host_bind_port` variable.
      when: "not matrix_nginx_proxy_enabled | default(False) | bool"

  tags:
    - always
  when: matrix_mautrix_facebook_enabled | bool and matrix_mautrix_facebook_appservice_public_enabled | bool
