---

- name: Check state of /etc/network/interfaces
  stat:
    path: /etc/network/interfaces
  register: interfaces_file

- debug:
    msg: A /etc/network/interfaces file already exists, nothing is done.
  when: interfaces_file.stat.exists and not force_update_eni_file

- block:
  - name: "Look for systemd network config"
    stat:
      path: /etc/systemd/network/50-default.network
    register: systemd_network_file

  - name: Set interface name
    set_fact:
      eni_interface_name: "{{ ansible_default_ipv4.interface }}"

  - include: set_facts_from_systemd.yml
    when: systemd_network_file.stat.exists

  - include: set_facts_from_ansible.yml
    when: not systemd_network_file.stat.exists

  - name: Check config (IPv4)
    assert:
      that:
        - eni_ipv4_address | ipv4
        - eni_ipv4_gateway | ipv4
      msg: "IPv4 configuration is invalid"

  - name: Check config (IPV6)
    assert:
      that:
        - eni_ipv6_address | ipv6
        - eni_ipv6_gateway | ipv6
      msg: "IPv6 configuration is invalid"
    when: eni_ipv6_address or eni_ipv6_gateway

  - name: "A new /etc/network/interfaces is generated"
    template:
      src: interfaces.j2
      dest: /etc/network/interfaces
      mode: "0644"
      owner: root
      group: root

  - name: "Systemd 'networkd' unit is stopped and disabled"
    systemd:
      name: systemd-networkd.service
      enabled: False
      state: stopped

  - name: "Systemd 'networking' unit is restarted (it often results in error)"
    systemd:
      name: networking
      enabled: True
      state: restarted
    ignore_errors: True

  - debug:
      msg: You should verify your configuration, then reboot the server.
  when: force_update_eni_file or not interfaces_file.stat.exists