---

- name: Fail if matrix-nginx-proxy role already executed
  ansible.builtin.fail:
    msg: >-
      Trying to append Slack Appservice'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-appservice-slack role.
  when: matrix_nginx_proxy_role_executed | default(False) | bool

- name: Generate Matrix Appservice Slack proxying configuration for matrix-nginx-proxy
  ansible.builtin.set_fact:
    matrix_appservice_slack_matrix_nginx_proxy_configuration: |
      location {{ matrix_appservice_slack_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_appservice_slack_appservice_url }}:{{ matrix_appservice_slack_slack_port }}";
          proxy_pass $backend;
      {% else %}
          {# Generic configuration for use outside of our container setup #}
          proxy_pass http://127.0.0.1:{{ matrix_appservice_slack_slack_port }};
      {% endif %}
      }

- name: Register Slack Appservice 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_appservice_slack_matrix_nginx_proxy_configuration]
      }}

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