---

- when: matrix_mx_puppet_slack_enabled | bool
  tags:
    - always
  block:
    - 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-mx-puppet-slack role.
      when: matrix_nginx_proxy_role_executed | default(False) | bool

    - name: Generate Matrix MX Puppet Slack proxying configuration for matrix-nginx-proxy
      ansible.builtin.set_fact:
        matrix_mx_puppet_slack_matrix_nginx_proxy_configuration: |
          location {{ matrix_mx_puppet_slack_redirect_path }} {
          {% 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_mx_puppet_slack_appservice_address }}";
              proxy_pass $backend;
          {% else %}
              {# Generic configuration for use outside of our container setup #}
              proxy_pass http://127.0.0.1:{{ matrix_mx_puppet_slack_appservice_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_mx_puppet_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_mx_puppet_slack_redirect_path }}`
      URL endpoint to the matrix-mx-puppet-slack container.
      You can expose the container's port using the `matrix_appservice_slack_container_http_host_bind_port` variable.
  when: "matrix_mx_puppet_slack_enabled | bool and not matrix_nginx_proxy_enabled | default(False) | bool"