---
- 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 | length == 0

- name: Validate detected interface is physical
  ansible.builtin.set_fact:
    wol_interface_final: "{{ wol_detected_interface }}"
  when:
    - wol_interface | length == 0
    - wol_detected_interface is defined
    - wol_detected_interface is not match("^vmbr")
    - wol_detected_interface is not match("^lo")
    - wol_detected_interface is not match("^bond")
    - wol_detected_interface is not match("^tap")
    - wol_detected_interface is not match("^veth")

- name: Use manually defined interface if provided
  ansible.builtin.set_fact:
    wol_interface_final: "{{ wol_interface }}"
  when: wol_interface | length > 0

- name: Fail if no suitable NIC was found
  ansible.builtin.fail:
    msg: >
      Unable to determine a suitable physical NIC for Wake-on-LAN.
      Please set wol_interface manually.
  when: wol_interface_final is not defined

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

- name: Fail if NIC does not support Wake-on-LAN
  ansible.builtin.fail:
    msg: "Interface {{ wol_interface_final }} 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_interface_final  }} wol {{ wol_mode }}
  changed_when: false

- name: Verify Wake-on-LAN status
  ansible.builtin.command: ethtool {{ wol_interface_final  }}
  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_interface_final]['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_interface_final }}"
  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_interface_final }}"
      - "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