ansible_proxmox_WOL/tasks/main.yml

---
- name: Install required packages
  ansible.builtin.apt:
    name: ethtool
    state: present
    update_cache: yes

- name: Gather network facts
  ansible.builtin.setup:
    gather_subset:
      - network

- name: Detect default route interface
  ansible.builtin.set_fact:
    wol_detected_interface: "{{ ansible_default_ipv4.interface }}"
  when: wol_interface | default('') | length == 0

# - name: Detect physical NIC enslaved to bridge
#   ansible.builtin.set_fact:
#     wol_detected_phy: "{{ item }}"
#   loop: "{{ ansible_interfaces }}"
#   when:
#     - wol_interface | default('') | length == 0
#     - item != 'lo'
#     - hostvars[inventory_hostname]['ansible_' + item] is defined
#     - hostvars[inventory_hostname]['ansible_' + item].master is defined
#     - hostvars[inventory_hostname]['ansible_' + item].master == wol_detected_bridge

- name: Detect physical NIC behind bridge
  ansible.builtin.set_fact:
    wol_detected_phy: "{{ ansible_facts[wol_detected_bridge].interfaces[0] }}"
  when:
    - wol_interface | default('') | length == 0
    - ansible_facts[wol_detected_bridge] is defined
    - ansible_facts[wol_detected_bridge].interfaces is defined
    - ansible_facts[wol_detected_bridge].interfaces | length > 0


- name: Debug WoL interface selection
  ansible.builtin.debug:
    msg:
      - "Detected interface:    {{ wol_detected_interface }}"
      - "Detected physical NIC: {{ wol_detected_phy }}"

- name: Select final WoL interface
  ansible.builtin.set_fact:
    wol_final_interface: >-
      {{
        wol_interface
        if wol_interface | default('') | length > 0
        else wol_detected_phy
      }}

- name: Fail if no physical NIC was detected
  ansible.builtin.fail:
    msg: >
      Unable to detect a physical NIC for Wake-on-LAN.
      Detected bridge: {{ wol_detected_bridge | default('none') }}.
      Please set wol_interface explicitly.
  when: wol_final_interface | default('') | length == 0

- name: Check WOL support on interface
  ansible.builtin.command: ethtool {{ wol_final_interface }}
  register: wol_capabilities
  changed_when: false

- name: Fail if NIC does not support Wake-on-LAN
  ansible.builtin.fail:
    msg: "Interface {{ wol_final_interface }} does not support Wake-on-LAN."
  when: "'Supports Wake-on-Wake-on-LAN' in wol_capabilities.stdout or
         'Wake-on:' not in wol_capabilities.stdout"

- name: Create systemd service for Wake-on-LAN
  ansible.builtin.template:
    src: wol.service.j2
    dest: /etc/systemd/system/wol.service
    owner: root
    group: root
    mode: '0644'
  notify:
    - Reload systemd
    - Enable and start WOL service

- name: Enable WOL immediately (without reboot)
  ansible.builtin.command: ethtool -s {{ wol_final_interface  }} wol {{ wol_mode }}
  changed_when: false

- name: Verify Wake-on-LAN status
  ansible.builtin.command: ethtool {{ wol_final_interface  }}
  register: wol_status
  changed_when: false
  when: wol_verify

- name: Get MAC address of WOL interface
  set_fact:
    wol_mac_address: >-
      {{
        ansible_facts['ansible_' + wol_final_interface]['macaddress']
        | default('')
      }}

- name: Show WOL status
  ansible.builtin.debug:
    msg: "{{ wol_status.stdout_lines }}"
  when: wol_verify

- name: Fail if MAC address could not be detected
  fail:
    msg: "Unable to determine MAC address for interface {{ wol_final_interface }}"
  when:
    - wol_report_mac
    - wol_mac_address | length == 0

- name: Report Wake-on-LAN sender details
  ansible.builtin.debug:
    msg:
      - "Wake-on-LAN enabled on interface: {{ wol_final_interface }}"
      - "MAC address: {{ wol_mac_address }}"
      - "Example WOL commands:"
      - "  wakeonlan {{ wol_mac_address }}"
      - "  etherwake {{ wol_mac_address }}"
      - "Home Assistant:"
      - "  mac: {{ wol_mac_address }}"
  when: wol_report_mac