---

- name: Fail if invalid homeserver implementation
  fail:
    msg: "You need to set a valid homeserver implementation in `matrix_homeserver_implementation`"
  when: "matrix_homeserver_implementation not in ['synapse', 'dendrite']"

# We generally support Ansible 2.7.1 and above.
- name: Fail if running on Ansible < 2.7.1
  fail:
    msg: "You are running on Ansible {{ ansible_version.string }}, which is not supported. See our guide about Ansible: https://github.com/spantaleev/matrix-docker-ansible-deploy/blob/master/docs/ansible.md"
  when:
    - "(ansible_version.major < 2) or (ansible_version.major == 2 and ansible_version.minor < 7) or (ansible_version.major == 2 and ansible_version.minor == 7 and ansible_version.revision < 1)"

# Though we do not support Ansible 2.9.6 which is buggy
- name: Fail if running on Ansible 2.9.6 on Ubuntu
  fail:
    msg: "You are running on Ansible {{ ansible_version.string }}, which is not supported. See our guide about Ansible: https://github.com/spantaleev/matrix-docker-ansible-deploy/blob/master/docs/ansible.md"
  when:
    - ansible_distribution == 'Ubuntu'
    - "ansible_version.major == 2 and ansible_version.minor == 9 and ansible_version.revision == 6"

- name: (Deprecation) Catch and report renamed settings
  fail:
    msg: >-
      Your configuration contains a variable, which now has a different name.
      Please change your configuration to rename the variable (`{{ item.old }}` -> `{{ item.new }}`).
  when: "item.old in vars"
  with_items:
    - {'old': 'host_specific_hostname_identity', 'new': 'matrix_domain'}
    - {'old': 'hostname_identity', 'new': 'matrix_domain'}
    - {'old': 'hostname_matrix', 'new': 'matrix_server_fqn_matrix'}
    - {'old': 'hostname_riot', 'new': 'matrix_server_fqn_element'}
    - {'old': 'matrix_server_fqn_riot', 'new': 'matrix_server_fqn_element'}

# We have a dedicated check for this variable, because we'd like to have a custom (friendlier) message.
- name: Fail if matrix_homeserver_generic_secret_key is undefined
  fail:
    msg: |
      The `matrix_homeserver_generic_secret_key` variable must be defined and have a non-null and non-empty value.

      If you're observing this error on a new installation, you should ensure that the `matrix_homeserver_generic_secret_key` is defined.

      If you're observing this error on an existing homeserver installation, you can fix it easily and in a backward-compatible way by adding
      `{% raw %}matrix_homeserver_generic_secret_key: "{{ matrix_synapse_macaroon_secret_key }}"{% endraw %}`
      to your `vars.yml` file. Using another secret value for the new variable is also possible and shouldn't cause any trouble.
  when: "matrix_homeserver_generic_secret_key is none or matrix_homeserver_generic_secret_key == ''"

- name: Fail if required variables are undefined
  fail:
    msg: "The `{{ item.var }}` variable must be defined and have a non-null and non-empty value"
  with_items:
    - {'var': matrix_domain, 'value': "{{ matrix_domain|default('') }}"}
    - {'var': matrix_server_fqn_matrix, 'value': "{{ matrix_server_fqn_matrix|default('') }}"}
    - {'var': matrix_server_fqn_element, 'value': "{{ matrix_server_fqn_element|default('') }}"}
    - {'var': matrix_homeserver_container_url, 'value': "{{ matrix_homeserver_container_url|default('') }}"}
    - {'var': matrix_homeserver_container_federation_url, 'value': "{{ matrix_homeserver_container_federation_url|default('') }}"}
  when: "item.value is none or item.value == ''"

- name: Fail if uppercase domain used
  fail:
    msg: "Detected that you're using an uppercase domain name - `{{ item }}`. This will cause trouble. Please use all-lowercase!"
  with_items:
    - "{{ matrix_domain }}"
    - "{{ matrix_server_fqn_matrix }}"
    - "{{ matrix_server_fqn_element }}"
  when: "item != item|lower"

- name: Fail if using python2 on Archlinux
  fail:
    msg: "Detected that you're using python2 when installing onto Archlinux. Archlinux by default only supports python3."
  when:
    - ansible_distribution == 'Archlinux'
    - ansible_python.version.major != 3

- name: Fail if architecture is set incorrectly
  fail:
    msg: "Detected that variable matrix_architecture {{ matrix_architecture }} appears to be set incorrectly. See docs/alternative-architectures.md. Server appears to be {{ ansible_architecture }}."
  when: (ansible_architecture == "x86_64" and matrix_architecture != "amd64") or
        (ansible_architecture == "aarch64" and matrix_architecture != "arm64") or
        (ansible_architecture.startswith("armv") and matrix_architecture != "arm32")