---

# If the matrix-synapse role is not used, `matrix_synapse_role_executed` won't exist.
# We don't want to fail in such cases.
- name: Fail if matrix-synapse role already executed
  fail:
    msg: >-
      The matrix-bridge-mautrix-telegram role needs to execute before the matrix-synapse role.
  when: "matrix_synapse_role_executed|default(False)"

- name: Ensure Mautrix Telegram image is pulled
  docker_image:
    name: "{{ matrix_mautrix_telegram_docker_image }}"
    source: "pull"

- name: Ensure Mautrix Telegram base directory exists
  file:
    path: "{{ matrix_mautrix_telegram_base_path }}"
    state: directory
    mode: 0750
    owner: "{{ matrix_user_username }}"
    group: "{{ matrix_user_username }}"

- name: Check if a mautrix-telegram configuration file exists
  stat:
    path: "{{ matrix_mautrix_telegram_base_path }}/config.yaml"
  register: mautrix_telegram_config_file_stat

- name: Ensure Matrix Mautrix telegram config installed
  template:
    src: "{{ role_path }}/templates/config.yaml.j2"
    dest: "{{ matrix_mautrix_telegram_base_path }}/config.yaml"
    mode: 0644
    owner: "{{ matrix_user_username }}"
    group: "{{ matrix_user_username }}"
  when: "not mautrix_telegram_config_file_stat.stat.exists"

- name: (Migration) Fix up old configuration
  lineinfile:
    path: "{{ matrix_mautrix_telegram_base_path }}/config.yaml"
    regexp: "{{ item.regexp }}"
    line: "{{ item.line }}"
    backrefs: yes
  with_items:
    - {'regexp': '^(\s+)filename: \./mautrix-telegram.log', 'line': '\1filename: /data/mautrix-telegram.log'}
    - {'regexp': '^(\s+)database:', 'line': '\1database: sqlite:////data/mautrix-telegram.db'}
  when: "mautrix_telegram_config_file_stat.stat.exists"

- name: Ensure matrix-mautrix-telegram.service installed
  template:
    src: "{{ role_path }}/templates/systemd/matrix-mautrix-telegram.service.j2"
    dest: "/etc/systemd/system/matrix-mautrix-telegram.service"
    mode: 0644
  register: matrix_mautrix_telegram_systemd_service_result

- name: Ensure systemd reloaded after matrix-mautrix-telegram.service installation
  service:
    daemon_reload: yes
  when: "matrix_mautrix_telegram_systemd_service_result.changed"

- name: Check if a mautrix-telegram registration file exists
  stat:
    path: "{{ matrix_mautrix_telegram_base_path }}/registration.yaml"
  register: mautrix_telegram_registration_file_stat

- name: Generate matrix-mautrix-telegram registration.yaml if it doesn't exist
  shell:
    cmd: >-
      /usr/bin/docker run
      --rm
      --user={{ matrix_user_uid }}:{{ matrix_user_gid }}
      --cap-drop=ALL
      --name matrix-mautrix-telegram-gen
      -v {{ matrix_mautrix_telegram_base_path }}:/data:z
      {{ matrix_mautrix_telegram_docker_image }}
      python3 -m mautrix_telegram -g -c /data/config.yaml -r /data/registration.yaml
  when: "not mautrix_telegram_registration_file_stat.stat.exists"

- set_fact:
    matrix_synapse_app_service_config_file_mautrix_telegram: '/app-registration/mautrix-telegram.yml'

# If the matrix-synapse role is not used, these variables may not exist.
- set_fact:
    matrix_synapse_container_additional_volumes: >
      {{ matrix_synapse_container_additional_volumes|default([]) }}
      +
      {{ [{'src': '{{ matrix_mautrix_telegram_base_path }}/registration.yaml', 'dst': '{{ matrix_synapse_app_service_config_file_mautrix_telegram }}', 'options': 'ro'}] }}

    matrix_synapse_app_service_config_files: >
      {{ matrix_synapse_app_service_config_files|default([]) }}
      +
      {{ ["{{ matrix_synapse_app_service_config_file_mautrix_telegram }}"] | to_nice_json  }}

- block:
  - name: Fail if matrix-nginx-proxy role already executed
    fail:
      msg: >
        Trying to append Mautrix Telegram'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 plabook,
        so that the matrix-nginx-proxy role would run after the matrix-bridge-mautrix-telegram role.
    when: matrix_nginx_proxy_role_executed|bool

  - name: Generate Mautrix Telegram proxying configuration for matrix-nginx-proxy
    set_fact:
      matrix_mautrix_telegram_matrix_nginx_proxy_configuration: |
        location {{ matrix_mautrix_telegram_public_endpoint }} {
        {% if matrix_nginx_proxy_enabled %}
        	{# Use the embedded DNS resolver in Docker containers to discover the service #}
        	resolver 127.0.0.11 valid=5s;
        	set $backend "matrix-mautrix-telegram:8080";
        	proxy_pass http://$backend;
        {% else %}
        	{# Generic configuration for use outside of our container setup #}
        	proxy_pass http://127.0.0.1:8080;
        {% endif %}
        }

  - name: Register Mautrix Telegram proxying configuration with matrix-nginx-proxy
    set_fact:
      matrix_nginx_proxy_proxy_matrix_additional_server_configuration_blocks: |
        {{
          matrix_nginx_proxy_proxy_matrix_additional_server_configuration_blocks
          +
          [matrix_mautrix_telegram_matrix_nginx_proxy_configuration]
        }}

  when: "matrix_nginx_proxy_enabled|default(False)"
  tags:
   - always

- name: Warn about reverse-proxying if matrix-nginx-proxy not used
  debug:
    msg: >
      NOTE: You've enabled the Mautrix Telegram bridge but are not using the matrix-nginx-proxy
      reverse proxy.
      Please make sure that you're proxying the `{{ matrix_mautrix_telegram_public_endpoint }}`
      URL endpoint to the matrix-mautrix-telegram container.
  when: "matrix_nginx_proxy_enabled is not defined"