---
# nvm role: installs NVM (Node Version Manager) for a given user, then a
# Node.js version via that NVM install.
#
# `claude_cli`/`codex`/`ai_support_agent` roles depend on the Node.js/npm
# environment this role sets up. There is no automatic role-dependency
# mechanism for `include_role` tasks, so recipe authors must include this
# role BEFORE those three (each asserts nvm's presence in its own
# tasks/main.yml so a missing/misordered nvm role fails with a clear
# message rather than an obscure "npm: command not found").
#
# `nvm_user`/`nvm_version`/`node_version` all have sensible defaults (unlike
# e.g. ssh_key's `ssh_key_public_key`, which cannot), so a bare
# `include_role: {name: nvm}` with no vars at all already works end to end.

- name: "nvm : Install prerequisite packages"
  ansible.builtin.apt:
    name:
      - curl
      - ca-certificates
    state: present
    update_cache: true

- name: "nvm : Resolve NVM install directory"
  ansible.builtin.set_fact:
    nvm_resolved_dir: "/home/{{ nvm_user | default('appuser') }}/.nvm"

- name: "nvm : Create NVM install directory"
  ansible.builtin.file:
    path: "{{ nvm_resolved_dir }}"
    state: directory
    owner: "{{ nvm_user | default('appuser') }}"
    mode: '0755'

- name: "nvm : Download NVM install script"
  ansible.builtin.get_url:
    url: "https://raw.githubusercontent.com/nvm-sh/nvm/{{ nvm_version | default('v0.40.6') }}/install.sh"
    dest: /tmp/nvm-install.sh
    mode: '0755'

# `creates:` makes this idempotent: a re-run (or a recipe that includes nvm
# twice for different later roles) skips re-running the installer once
# nvm.sh already exists for this user.
- name: "nvm : Run NVM install script"
  ansible.builtin.command:
    cmd: bash /tmp/nvm-install.sh
  become_user: "{{ nvm_user | default('appuser') }}"
  environment:
    NVM_DIR: "{{ nvm_resolved_dir }}"
  args:
    creates: "{{ nvm_resolved_dir }}/nvm.sh"

- name: "nvm : Install Node.js via NVM"
  ansible.builtin.shell: |
    set -e
    export NVM_DIR="{{ nvm_resolved_dir }}"
    . "$NVM_DIR/nvm.sh"
    nvm install {{ node_version | default('--lts') }}
  args:
    executable: /bin/bash
  become_user: "{{ nvm_user | default('appuser') }}"
  register: nvm_install_node_result
  changed_when: "'is already installed' not in nvm_install_node_result.stdout"