---

- name: Ensure k3s control node fact is set
  set_fact:
    k3s_control_node: false
  when: k3s_control_node is not defined

- name: Ensure a k3s control node is defined if none are found in play_hosts
  block:
    - name: Set control host
      set_fact:
        k3s_control_node: true
      when: inventory_hostname == play_hosts[0]
  when: true not in (hostvars | json_query('*.k3s_control_node'))

- name: Ensure a count of control masters is generated
  set_fact:
    k3s_controller_count: "{{ k3s_controller_count + [ item ] }}"
  when: item
  loop: "{{ hostvars | json_query('*.k3s_control_node') }}"

- name: Fail playbook if there are multiple controllers defined
  fail:
    msg: "Multiple controllers have been defined. This is not yet supported."
  when: k3s_controller_count | length > 1