--- 

- name: Set default hostname
  ansible.builtin.set_fact:
    guest_hostname: "new-lxc-test"

- name: Prompt for hostname with immediate validation
  ansible.builtin.pause:
    prompt: "Enter hostname (letters, digits, hyphens, dots; max 253 chars) [new-lxc-test]"
  register: hostname_result
  until: >
    hostname_result.user_input | length == 0 or
    (
      hostname_result.user_input | length <= 253 and
      hostname_result.user_input is regex('^[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$')
    )
  retries: 2
  delay: 0

- name: Use user input only if provided, otherwise keep the default
  ansible.builtin.set_fact:
    guest_hostname: "{{ hostname_result.user_input }}"
  when: hostname_result.user_input | length > 0