---
- name: Derive record name within zone from fqdn
  ansible.builtin.set_fact:
    samba_dns_record_name: >-
      {{
        (item.fqdn | regex_replace('\\.?$','')) |
        regex_replace('\\.' ~ (prole_domain | regex_escape) ~ '$', '')
      }}

- name: Query existing A records
  ansible.builtin.command:
    cmd: samba-tool dns query {{ samba_dns_server }} {{ prole_domain }} {{ samba_dns_record_name }} A -U {{ samba_dns_admin_user }}%{{ samba_dns_admin_pass }}
  register: a_query
  changed_when: false
  failed_when: false

- name: Parse existing A record values
  ansible.builtin.set_fact:
    a_existing_values: >-
      {{
        (a_query.stdout | default('') |
         regex_findall('\\bA\\s+([0-9]{1,3}(?:\\.[0-9]{1,3}){3})\\b') |
         list)
      }}

- name: Remove stale A records
  ansible.builtin.command:
    cmd: samba-tool dns delete {{ samba_dns_server }} {{ prole_domain }} {{ samba_dns_record_name }} A {{ a_value }} -U {{ samba_dns_admin_user }}%{{ samba_dns_admin_pass }}
  loop: "{{ a_existing_values | difference(item.ipv4s) }}"
  loop_control:
    loop_var: a_value
  when: (a_existing_values | difference(item.ipv4s) | length) > 0

- name: Add missing A records
  ansible.builtin.command:
    cmd: samba-tool dns add {{ samba_dns_server }} {{ prole_domain }} {{ samba_dns_record_name }} A {{ a_target_ip }} -U {{ samba_dns_admin_user }}%{{ samba_dns_admin_pass }}
  register: a_add
  changed_when: a_add.rc == 0
  failed_when: >
    a_add.rc != 0 and
    ('WERR_DNS_ERROR_RECORD_ALREADY_EXISTS' not in (a_add.stderr | default(''))) and
    ('Record already exists' not in (a_add.stderr | default('')))
  loop: "{{ item.ipv4s | difference(a_existing_values) }}"
  loop_control:
    loop_var: a_target_ip
  when: (item.ipv4s | difference(a_existing_values) | length) > 0