- name: Gather installed package facts
  package_facts:
    manager: auto

- name: Debug OS family fact
  debug:
    msg: "{{ ansible_facts['os_family'] }} is the OS"

- name: Set NRPE package name
  set_fact:
    nrpe_package: >
      {% if ansible_facts['os_family'] == 'Debian' %}
        nagios-nrpe-server
      {% elif ansible_facts['os_family'] == 'RedHat' %}
        nagios-plugins-nrpe.x86_64
      {% else %}
        nrpe
      {% endif %}
    register: nrpe_package_set
    
- name: Set NRPE package location
  set_fact:
    nrpe_location: >
      {% if ansible_facts['os_family'] == 'Debian' %}
        /usr/lib/nagios/plugins/
      {% elif ansible_facts['os_family'] == 'RedHat' %}
        /usr/local/nagios/libexec/
      {% else %}
        /usr/local/libexec/nagios/
      {% endif %}
    register: nrpe_package_location_set


- name: Set NRPE package name
  set_fact:
    nrpe_installed: "{{ nrpe_package in ansible_facts.packages }}"
  

- name: Check if nagios NRPE  is installed
  debug:
    msg: "NRPE is installed."
  when: nrpe_installed  

- name: Ensure NRPE is installed (Debian/Ubuntu)
  apt:
    name: "{{ nrpe_package }}" 
    state: present
  become: true
  register: nrpe_install_result
  when: 
     -  ansible_facts['os_family']  == 'Debian' 
     -  not nrpe_installed

- name: Ensure NRPE is installed (RedHat/CentOS)
  yum:
    name: "{{ nrpe_package }}" 
    state: present
  become: true
  register: nrpe_install_result
  when: 
     -  ansible_facts['os_family']  == 'RedHat' 
     -  not nrpe_installed

- name: Ensure NRPE is installed (FreeBSD)
  ansible.builtin.pkgng:
    name: "{{ nrpe_package }}"
    state: present
  become: true
  register: nrpe_install_result
  when:
    - ansible_facts['os_family'] == 'FreeBSD'
    - not nrpe_installed


- name: Set psutil_installed fact if any package name contains "psutil"
  ansible.builtin.set_fact:
    psutil_installed: "{{ (ansible_facts.packages | default({}) | dict2items | map(attribute='key') | select('search','psutil') | list) | length > 0 }}"

- name: Debug psutil presence
  ansible.builtin.debug:
    msg: "psutil already installed on host."
  when: psutil_installed

- name: Ensure python3-psutil is installed (Debian/Ubuntu)
  ansible.builtin.apt:
    name: python3-psutil
    state: present
  become: true
  register: psutil_install_result
  when:
    - ansible_facts['os_family'] == 'Debian'
    - not psutil_installed

- name: Ensure python3-psutil is installed (RedHat/CentOS)
  ansible.builtin.yum:
    name: python3-psutil
    state: present
  become: true
  register: psutil_install_result
  when:
    - ansible_facts['os_family'] == 'RedHat'
    - not psutil_installed

- name: Ensure psutil is installed (FreeBSD)
  ansible.builtin.pkgng:
    name: python3-psutil
    state: present
  become: true
  register: psutil_install_result
  when:
    - ansible_facts['os_family'] == 'FreeBSD'
    - not psutil_installed


- name: Deploy custom Nagios/NRPE script
  ansible.builtin.copy:
    src: memory_usage.py
    dest: /usr/lib/nagios/plugins/
    owner: root
    group: root   
    mode: '0755'
    remote_src: false
  become: true
  when:
     - nrpe_installed is defined
     - psutil_installed is defined

- name: Debug NRPE installation result
  debug:
    var: nrpe_install_result