---

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

# 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 Matrix media store path exists
  file:
    path: "{{ matrix_synapse_media_store_path }}"
    state: directory
    mode: 0750
    owner: "{{ matrix_user_username }}"
    group: "{{ matrix_user_username }}"
  when: "not local_path_media_store_stat.failed and not local_path_media_store_stat.stat.exists"

- name: Ensure Matrix Docker image is pulled
  docker_image:
    name: "{{ matrix_synapse_docker_image }}"

- name: Check if a Matrix Synapse configuration exists
  stat:
    path: "{{ matrix_synapse_config_dir_path }}/homeserver.yaml"
  register: matrix_synapse_config_stat

# We do this mostly so that the keys would get generated.
# We'll replace the rest of the configuration with our own templates below.
- name: Generate initial Matrix config
  docker_container:
    name: matrix-config
    image: "{{ matrix_synapse_docker_image }}"
    detach: no
    cleanup: yes
    command: generate
    env:
      SYNAPSE_CONFIG_PATH: "/data/homeserver.yaml"
      SYNAPSE_SERVER_NAME: "{{ hostname_matrix }}"
      SYNAPSE_REPORT_STATS: "no"
    user: "{{ matrix_user_uid }}:{{ matrix_user_gid }}"
    cap_drop: ['all']
    volumes:
      - "{{ matrix_synapse_config_dir_path }}:/data"
  when: "not matrix_synapse_config_stat.stat.exists"

- name: Ensure Matrix homeserver config installed
  template:
    src: "{{ matrix_synapse_template_synapse_homeserver }}"
    dest: "{{ matrix_synapse_config_dir_path }}/homeserver.yaml"
    mode: 0644

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

#
# To make Synapse 0.99 happy, we need to generate a valid (self-signed is OK) certificate file that we provide to it.
# It won't be used for anything important, but it needs to be there.
# See https://github.com/matrix-org/synapse/issues/4554
#
# Previously, Synapse would generate such certificate files and actually use them.
# So existing installations already have them.
#

- name: Check if Synapse certificate exists
  stat:
    path: "{{ matrix_synapse_config_dir_path }}/{{ hostname_matrix }}.tls.crt"
  register: matrix_synapse_certificate_stat

- name: Ensure OpenSSL installed (RedHat)
  yum:
    name:
      - openssl
    state: present
    update_cache: no
  when: "not matrix_synapse_certificate_stat.stat.exists and ansible_os_family == 'RedHat'"

- name: Ensure OpenSSL installed (Debian)
  apt:
    name:
      - openssl
    state: present
    update_cache: no
  when: "not matrix_synapse_certificate_stat.stat.exists and ansible_os_family == 'Debian'"

# The proper way to do this is by using a sequence of
# `openssl_privatekey`, `openssl_csr` and `openssl_certificate`.
#
# Unfortunately, `openssl_csr` and `openssl_certificate` require `PyOpenSSL>=0.15` to work,
# which is not available on CentOS 7 (at least).
#
# We'll do it in a more manual way.
- name: Generate SSL certificate
  command: |
    openssl req -x509 \
    -sha256 \
    -newkey rsa:4096 \
    -nodes \
    -subj "/CN={{ hostname_matrix }}" \
    -keyout {{ matrix_synapse_config_dir_path }}/{{ hostname_matrix }}.tls.key \
    -out {{ matrix_synapse_config_dir_path }}/{{ hostname_matrix }}.tls.crt \
    -days 3650
  become: true
  become_user: "{{ matrix_user_username }}"
  when: "not matrix_synapse_certificate_stat.stat.exists"

#
# End of tasks related to making Synapse 0.99 happy.
#

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

- name: Ensure matrix-synapse-register-user script created
  template:
    src: "{{ role_path }}/templates/synapse/usr-local-bin/matrix-synapse-register-user.j2"
    dest: "/usr/local/bin/matrix-synapse-register-user"
    mode: 0750

- name: Allow access to Matrix ports in firewalld
  firewalld:
    port: "{{ item }}"
    state: enabled
    immediate: yes
    permanent: yes
  with_items:
    - '8448/tcp' # Matrix federation
  when: ansible_os_family == 'RedHat'