---
- name: Fail if source interface does not exist
  fail:
    msg: >
      The interface {{ source_interface }} specified for the physical network
      {{ network_name }} does not exist.
  when: source_interface not in ansible_interfaces

### Firstly, some fact gathering.
# Start off by assuming the source interface is direct, unless proven
# otherwise.
- set_fact:
    source_type: direct

- name: Get source interface details
  command: ip -details link show {{ source_interface }}
  register: if_details
  changed_when: false

- name: Register source interface as a Linux bridge
  set_fact:
    source_type: linux_bridge
  when: if_details.stdout_lines[-1].split()[0] == 'bridge'

- block:
    - name: Get list of OVS bridges
      command: ovs-vsctl list-br
      register: ovs_bridges
      changed_when: false

    - name: Register source interface as an Open vSwitch bridge
      set_fact:
        source_type: ovs_bridge
      when: source_interface in ovs_bridges.stdout_lines

  when: if_details.stdout_lines[-1].split()[0] == 'openvswitch'


### Actual configuration starts here.
- name: Ensure Open vSwitch bridge exists
  openvswitch_bridge:
    bridge: "{{ tenks_bridge }}"

- name: Connect to existing Linux bridge
  when: source_type == 'linux_bridge'
  include_role:
    name: veth-pair
  vars:
    veth_pair_ovs_bridge: "{{ tenks_bridge }}"
    veth_pair_ovs_link_name: >-
      {{ veth_prefix + tenks_bridge + veth_bridge_ovs_suffix }}
    veth_pair_source_bridge: "{{ source_interface }}"
    veth_pair_source_link_name: >-
      {{ veth_prefix + tenks_bridge + veth_bridge_source_suffix }}
    plug_into_source: true

- name: Connect to existing Open vSwitch bridge
  when: source_type == 'ovs_bridge'
  block:
    - name: Create patch port on Tenks bridge
      openvswitch_port:
        bridge: "{{ tenks_bridge }}"
        port: "{{ veth_prefix + tenks_bridge + veth_bridge_ovs_suffix }}"
        # Despite the module documentation, `set` will happily take multiple
        # properties.
        set: >-
          Interface {{ veth_prefix + tenks_bridge + veth_bridge_ovs_suffix }}
            type=patch
            options:peer={{ veth_prefix + tenks_bridge +
                            veth_bridge_source_suffix }}

    - name: Create patch port on source bridge
      openvswitch_port:
        bridge: "{{ source_interface }}"
        port: "{{ veth_prefix + tenks_bridge + veth_bridge_source_suffix }}"
        set: >-
          Interface {{ veth_prefix + tenks_bridge + veth_bridge_source_suffix }}
            type=patch
            options:peer={{ veth_prefix + tenks_bridge +
                            veth_bridge_ovs_suffix }}

- name: Plug source interface into Tenks bridge
  when: source_type == 'direct'
  openvswitch_port:
    bridge: "{{ tenks_bridge }}"
    port: "{{ source_interface }}"