# https://stackoverflow.com/questions/79905530/ansible-split-based-on-a-list-of-strings-and-with-the-input-being-a-list

- name: "Q: Split based on a list of strings."
  hosts: localhost

  vars:

    input_fqdns:
      - host1.mydomain.internal
      - host2.mydomain.net

    known_domains:
      - mydomain.internal
      - mydomain.net

    desired_output:
      - {unqualified: 'host1', domain_name: 'mydomain.internal'}
      - {unqualified: 'host2', domain_name: 'mydomain.net'}

  tasks:

    - name: Split by dots.
      vars:
        _split: "{{ input_fqdns | map('split', '.', 1) }}"
        _output: "{{ _split | map('zip', ['unqualified', 'domain_name'])
                            | map('map', 'reverse')
                            | map('community.general.dict') }}"
      debug:
        msg: |
          desired_output:
            {{ _output | to_yaml(indent=2) | indent(2) }}

#   msg: |-
#       desired_output:
#         - {domain_name: mydomain.internal, unqualified: host1}
#         - {domain_name: mydomain.net, unqualified: host2}

    - name: Split by regex.
      vars:
        _regex1: "\\.({{ known_domains | join('|') }})"
        _unqualified: "{{ input_fqdns | map('regex_replace', _regex1, '') }}"
        _regex2: "^.*({{ known_domains | join('|') }})"
        _replace2: '\1'
        _domain_name: "{{ input_fqdns | map('regex_replace', _regex2, _replace2) }}"
        _output: "{{ _unqualified | zip(_domain_name)
                                  | map('zip', ['unqualified', 'domain_name'])
                                  | map('map', 'reverse') 
                                  | map('community.general.dict') }}"
      debug:
        msg: |
          _unqualified:
            {{ _unqualified | to_yaml(indent=2) | indent(2) }}
          _domain_name:
            {{ _domain_name | to_yaml(indent=2) | indent(2) }}
          desired_output:
            {{ _output | to_yaml(indent=2) | indent(2) }}

#   msg: |-
#       _unqualified:
#         [host1, host2]
#        _domain_name:
#         [mydomain.internal, mydomain.net]
#       desired_output:
#         - {domain_name: mydomain.internal, unqualified: host1}
#         - {domain_name: mydomain.net, unqualified: host2}