- name: validate requirements for fluentbit
  gather_facts: no
  hosts: "{{target}}"
  become: "{{become}}"
  tasks:

  #- name: assert non-isolated
  #  assert:
  #    that: isolated is not defined

  #
  # mandatory checks - will stop tasks if fails
  #

  - name: time-series server is reachable
    ansible.builtin.wait_for: host={{tsdb_host}} port={{tsdb_port}} timeout=1

  - name: log server is reachable
    ansible.builtin.wait_for: host={{log_host}} port={{log_port}} timeout=1

  - name: fluentbit is installed
    ansible.builtin.shell:
      executable: /bin/bash
      cmd: "[[ -x /opt/fluent-bit/bin/fluent-bit || -x /usr/local/bin/fluent-bit ]] && [[ -d /etc/fluent-bit/ ]]"
    changed_when: false
    check_mode: false

  # now grabbed at setup-time
  # those are grabbed at install-time, see tasks-flb-install.yml
  #- name: mmdb files are there
  #  ansible.builtin.shell:
  #    executable: /bin/bash
  #    cmd: "ls -lhF /etc/fluent-bit/*.mmdb"
  #  changed_when: false
  #  check_mode: false

  - name: define distro
    ansible.builtin.shell:
      executable: /bin/bash
      cmd: "lsb_release -is 2>/dev/null | tr A-Z a-z || echo unknown"
    register: distro
    changed_when: false
    check_mode: false
  - debug: var=distro.stdout

  - name: define auth_log_file for debian/ubuntu systems
    ansible.builtin.set_fact:
      auth_log_file: "/var/log/auth.log"
    when: distro.stdout == 'debian' or distro.stdout == 'ubuntu'

  - name: define auth_log_file for non-debian systems
    ansible.builtin.set_fact:
      auth_log_file: "/var/log/secure"
    when: distro.stdout != 'debian' and distro.stdout != 'ubuntu'

  - name: auth log is there
    ansible.builtin.shell:
      executable: /bin/bash
      cmd: "[[ -f {{auth_log_file}} ]]"
    changed_when: false
    check_mode: false

  # https://docs.ansible.com/ansible/latest/playbook_guide/playbooks_tests.html#type-tests
  - name: assert variables
    ansible.builtin.assert:
      that: >
        ( addons is defined ) and
        ( addons is not string ) and
        ( addons is not mapping ) and
        ( addons is iterable ) and
        ( addons is sequence )