---
# Installed from the official nodejs.org tarball rather than a distro repo so
# that multica_node_version is a real pin on every distribution.

- name: Node | Check whether the pinned runtime is already present
  ansible.builtin.stat:
    path: "{{ multica_install_dir }}/node"
  register: _multica_node_stat
  check_mode: false

- name: Node | Read the installed version
  ansible.builtin.command:
    argv: ["{{ multica_install_dir }}/node", "--version"]
  register: _multica_node_installed
  when: _multica_node_stat.stat.exists
  changed_when: false
  failed_when: false
  check_mode: false

- name: Node | Decide whether an install is needed
  ansible.builtin.set_fact:
    _multica_node_needs_install: >-
      {{ (not _multica_node_stat.stat.exists)
         or (_multica_node_installed.rc | default(1)) != 0
         or (_multica_node_installed.stdout | default('') | trim) != ('v' ~ multica_node_version) }}

- name: Node | Install the pinned runtime
  when: _multica_node_needs_install | bool
  block:
    - name: Node | Create the install prefix
      ansible.builtin.file:
        path: "{{ multica_node_prefix }}"
        state: directory
        owner: root
        group: root
        mode: "0755"
      become: true

    # get_url resolves `sha256:<url>` against the file's basename in SHASUMS256.txt.
    - name: Node | Download the tarball with checksum verification
      ansible.builtin.get_url:
        url: "{{ multica_node_dist_base_url }}/v{{ multica_node_version }}/node-v{{ multica_node_version }}-linux-{{ _multica_node_arch }}.tar.xz"
        dest: "/tmp/node-v{{ multica_node_version }}-linux-{{ _multica_node_arch }}.tar.xz"
        checksum: "sha256:{{ multica_node_dist_base_url }}/v{{ multica_node_version }}/SHASUMS256.txt"
        mode: "0644"
      become: true

    - name: Node | Unpack it
      ansible.builtin.unarchive:
        src: "/tmp/node-v{{ multica_node_version }}-linux-{{ _multica_node_arch }}.tar.xz"
        dest: "{{ multica_node_prefix }}"
        remote_src: true
        owner: root
        group: root
        creates: "{{ multica_node_prefix }}/node-v{{ multica_node_version }}-linux-{{ _multica_node_arch }}/bin/node"
      become: true

    - name: Node | Remove the downloaded tarball
      ansible.builtin.file:
        path: "/tmp/node-v{{ multica_node_version }}-linux-{{ _multica_node_arch }}.tar.xz"
        state: absent
      become: true

# Symlinked into /usr/local/bin, which is on systemd's default PATH — the
# daemon's autostart unit does not source /etc/profile.d.
- name: Node | Link node, npm and npx onto the default PATH
  ansible.builtin.file:
    src: "{{ multica_node_prefix }}/node-v{{ multica_node_version }}-linux-{{ _multica_node_arch }}/bin/{{ item }}"
    dest: "{{ multica_install_dir }}/{{ item }}"
    state: link
    force: true
  become: true
  loop: [node, npm, npx]

- name: Node | Create the daemon user's npm global prefix
  ansible.builtin.file:
    path: "{{ multica_npm_prefix }}"
    state: directory
    owner: "{{ multica_user }}"
    group: "{{ multica_group }}"
    mode: "0755"
  become: true

- name: Node | Point the daemon user's npm at that prefix
  ansible.builtin.lineinfile:
    path: "{{ multica_user_home }}/.npmrc"
    regexp: '^prefix='
    line: "prefix={{ multica_npm_prefix }}"
    create: true
    owner: "{{ multica_user }}"
    group: "{{ multica_group }}"
    mode: "0644"
  become: true