---
- name: Query existing PTR records
  ansible.builtin.command:
    cmd: samba-tool dns query {{ samba_dns_server }} {{ lan_reverse_zone }} {{ item.last_octet }} PTR -U Administrator --password={{ samba_dns_admin_pass }}
  register: ptr_query
  changed_when: false
  failed_when: false

- name: Parse existing PTR records
  ansible.builtin.set_fact:
    ptr_existing_values: >-
      {{
        (ptr_query.stdout | default('') |
         regex_findall('PTR:\\s+([A-Za-z0-9.-]+)\\.?') |
         map('regex_replace', '\\.$', '') |
         list)
      }}

- name: Remove stale PTR records
  ansible.builtin.command:
    cmd: samba-tool dns delete {{ samba_dns_server }} {{ lan_reverse_zone }} {{ item.last_octet }} PTR {{ ptr_value }} -U Administrator --password={{ samba_dns_admin_pass }}
  loop: "{{ ptr_existing_values | reject('equalto', item.fqdn) | list }}"
  loop_control:
    loop_var: ptr_value
  when: (ptr_existing_values | reject('equalto', item.fqdn) | list | length) > 0

- name: Add expected PTR record
  ansible.builtin.command:
    cmd: samba-tool dns add {{ samba_dns_server }} {{ lan_reverse_zone }} {{ item.last_octet }} PTR {{ item.fqdn }} -U Administrator --password={{ samba_dns_admin_pass }}
  register: ptr_add
  changed_when: ptr_add.rc == 0
  failed_when: >
    ptr_add.rc != 0 and
    ('WERR_DNS_ERROR_RECORD_ALREADY_EXISTS' not in (ptr_add.stderr | default(''))) and
    ('Record already exists' not in (ptr_add.stderr | default('')))
  when: item.fqdn not in ptr_existing_values