- tags:
    - lxc-host
    - lxc-host-network
  become: yes
  vars:
    file_prefix: "/etc/systemd/network/{{ lxc_host__networkd_number }}-lxc-host"
    br_if: "{{ lxc_host__br_if }}"
    internal_if: "{{ host_database[ansible_hostname].interfaces[lxc_host__internal_if] }}"
  block:
    - debug: var=br_if
    - debug: var=internal_if

    - name: enable systemd-networkd
      service:
        name: systemd-networkd
        enabled: yes
        state: started
      when: lxc_host__state == "present"

    - loop:
        - "{{ file_prefix }}-1-{{ br_if }}.netdev"
        - "{{ file_prefix }}-2-{{ br_if }}.network"
        - "{{ file_prefix }}-3-{{ lxc_host__internal_if }}.netdev"
        - "{{ file_prefix }}-4-{{ lxc_host__internal_if }}.network"
      when: lxc_host__state == "absent"
      notify: systemctl restart systemd-networkd
      file:
        path: "{{ item }}"
        state: absent

    - name: "{{ file_prefix }}-1-{{ br_if }}.netdev"
      notify: systemctl restart systemd-networkd
      when: lxc_host__state == "present"
      copy:
        dest: "{{ file_prefix }}-1-{{ br_if }}.netdev"
        content: |
          [NetDev]
          Name={{ br_if }}
          Kind=bridge

    - name: "{{ file_prefix }}-2-{{ br_if }}.network"
      notify: systemctl restart systemd-networkd
      when: lxc_host__state == "present"
      copy:
        dest: "{{ file_prefix }}-2-{{ br_if }}.network"
        content: |
          [Match]
          Name={{ br_if }}

          [Network]
          {% if internal_if.ipv4 is defined %}
          Address={{ internal_if.ipv4.address }}/{{ internal_if.ipv4.netmask }}
          {% if internal_if.ipv4.gateway is defined %}
          Gateway={{ internal_if.ipv4.gateway }}
          {% endif %}
          {% endif %}
          {% if internal_if.ipv6 is defined %}
          Address={{ internal_if.ipv6.address }}/{{ internal_if.ipv6.netmask }}
          {% endif %}
          {% if internal_if.dns is defined %}
          {% for dns in internal_if.dns %}
          DNS={{ dns }}
          {% endfor %}
          {% endif %}

    - name: "{{ file_prefix }}-3-{{ lxc_host__internal_if }}.netdev"
      notify: systemctl restart systemd-networkd
      when: lxc_host__state == "present"
      copy:
        dest: "{{ file_prefix }}-3-{{ lxc_host__internal_if }}.netdev"
        content: |
          [NetDev]
          Name={{ lxc_host__internal_if }}
          Kind=dummy

    - name: "{{ file_prefix }}-4-{{ lxc_host__internal_if }}.network"
      notify: systemctl restart systemd-networkd
      when: lxc_host__state == "present"
      copy:
        dest: "{{ file_prefix }}-4-{{ lxc_host__internal_if }}.network"
        content: |
          [Match]
          Name={{ lxc_host__internal_if }}

          [Network]
          Bridge={{ br_if }}

    - meta: flush_handlers

    - name: Configure sysctl, enable ipv4 and ipv6 forwarding for {{ br_if }}
      with_items:
        - net.ipv4.conf.{{ br_if }}.forwarding
        - net.ipv6.conf.{{ br_if }}.forwarding
      sysctl:
        name: "{{ item }}"
        value: 1
        state: "{{ lxc_host__state }}"