---
- name: Create node_exporter system user
  ansible.builtin.user:
    name: "{{ node_exporter_user }}"
    system: true
    create_home: false
    shell: /usr/sbin/nologin
    state: present

- name: Download node_exporter binary
  ansible.builtin.get_url:
    url: "https://github.com/prometheus/node_exporter/releases/download/v{{ node_exporter_version }}/node_exporter-{{ node_exporter_version }}.linux-amd64.tar.gz"
    dest: "/tmp/node_exporter-{{ node_exporter_version }}.tar.gz"
    mode: '0644'
  register: node_exporter_download

- name: Extract node_exporter binary
  ansible.builtin.unarchive:
    src: "/tmp/node_exporter-{{ node_exporter_version }}.tar.gz"
    dest: /tmp
    remote_src: true
    creates: "/tmp/node_exporter-{{ node_exporter_version }}.linux-amd64"
  when: node_exporter_download.changed

- name: Copy node_exporter binary to /usr/local/bin
  ansible.builtin.copy:
    src: "/tmp/node_exporter-{{ node_exporter_version }}.linux-amd64/node_exporter"
    dest: /usr/local/bin/node_exporter
    owner: root
    group: root
    mode: '0755'
    remote_src: true
  when: node_exporter_download.changed

- name: Deploy node_exporter systemd service
  ansible.builtin.template:
    src: node_exporter.service.j2
    dest: /etc/systemd/system/node_exporter.service
    owner: root
    group: root
    mode: '0644'
  notify: restart node_exporter

- name: Enable and start node_exporter service
  ansible.builtin.systemd:
    name: node_exporter
    enabled: "{{ node_exporter_service_enabled }}"
    state: "{{ node_exporter_service_state }}"
    daemon_reload: true