---
- name: Validate required configuration
  ansible.builtin.assert:
    that:
      - nut_exporter_nut_password is defined
      - nut_exporter_nut_password | length >= 12
    fail_msg: |
      nut_exporter_nut_password (>=12 chars) is required.
      Usually set to the same value as nut_monitor_password.

- name: Load OS-specific variables
  ansible.builtin.include_vars: "{{ item }}"
  with_first_found:
    - "{{ ansible_facts['os_family'] }}.yml"

- name: Install prometheus-nut-exporter (AUR via paru)
  ansible.builtin.command: "paru -S --noconfirm --needed {{ nut_exporter_package }}"
  register: nut_exporter_install
  changed_when: "'there is nothing to do' not in nut_exporter_install.stdout | lower"
  when: ansible_facts['os_family'] == 'Archlinux'

- name: Ensure systemd override directory exists
  ansible.builtin.file:
    path: "{{ nut_exporter_override_dir }}"
    state: directory
    owner: root
    group: root
    mode: "0755"

- name: Deploy systemd override (listen address + upsd credentials)
  ansible.builtin.template:
    src: override.conf.j2
    dest: "{{ nut_exporter_override_dir }}/override.conf"
    owner: root
    group: root
    mode: "0640"
  notify:
    - Reload systemd
    - Restart nut_exporter

- name: Enable and start nut_exporter
  ansible.builtin.systemd:
    name: "{{ nut_exporter_service }}"
    enabled: true
    state: started
    daemon_reload: true