---
- name: Set DNS configuration facts
  ansible.builtin.set_fact:
    configuration_dns_list: "{{ system_cfg.network.dns.servers }}"
    configuration_dns_search: "{{ system_cfg.network.dns.search }}"

# 2+ unnamed interfaces would all match the first-ethernet glob, leaving the rest unconfigured.
- name: Require an explicit name on every interface for multi-NIC
  vars:
    _unnamed: "{{ system_cfg.network.interfaces | map(attribute='name', default='') | map('string') | select('equalto', '') | list | length }}"
  ansible.builtin.assert:
    that:
      - system_cfg.network.interfaces | length <= 1 or _unnamed == 0
    fail_msg: >-
      Multi-NIC (system.network.interfaces with 2+ entries) requires a name on
      every interface; the first-adapter glob only binds a single NIC.

# Probe /mnt to detect the stack the installed rootfs will run (nothing runs in
# the chroot). NM is checked first and wins, since bootstrap installs it on every
# family; the rest are the fallback for a non-NM base image.
- name: Probe the installed network stack on the target rootfs
  ansible.builtin.stat:
    path: "{{ item }}"
  register: configuration_net_probe
  loop:
    - /mnt/usr/bin/nmcli
    - /mnt/usr/lib/systemd/system/NetworkManager.service
    - /mnt/usr/sbin/netplan
    - /mnt/etc/netplan
    - /mnt/sbin/ifup
    - /mnt/usr/sbin/ifup
    - /mnt/etc/systemd/system/multi-user.target.wants/systemd-networkd.service
    - /mnt/etc/systemd/system/dbus-org.freedesktop.network1.service
  loop_control:
    label: "{{ item }}"

- name: Resolve the network backend from the probe
  vars:
    _found: "{{ configuration_net_probe.results | selectattr('stat.exists') | map(attribute='item') | list }}"
  ansible.builtin.set_fact:
    configuration_network_backend: >-
      {{
        'nm' if (['/mnt/usr/bin/nmcli', '/mnt/usr/lib/systemd/system/NetworkManager.service'] | intersect(_found))
        else 'netplan' if (['/mnt/usr/sbin/netplan', '/mnt/etc/netplan'] | intersect(_found))
        else 'eni' if (['/mnt/sbin/ifup', '/mnt/usr/sbin/ifup'] | intersect(_found))
        else 'networkd' if (['/mnt/etc/systemd/system/multi-user.target.wants/systemd-networkd.service', '/mnt/etc/systemd/system/dbus-org.freedesktop.network1.service'] | intersect(_found))
        else 'nm'
      }}

- name: Configure networking for the detected backend {{ configuration_network_backend }}
  ansible.builtin.include_tasks: "network_{{ configuration_network_backend }}.yml"