---
- name: Check Host Availability
  hosts: all
  gather_facts: false
  ignore_unreachable: true

  tasks:
    - name: Ping hosts to check availability
      ansible.builtin.ping:
      register: ping_result
      ignore_errors: true
      ignore_unreachable: true

    - name: Add reachable hosts to group
      ansible.builtin.group_by:
        key: reachable_hosts
      when: ping_result is succeeded

    - name: Report offline hosts
      ansible.builtin.debug:
        msg: "{{ inventory_hostname }} - OFFLINE"
      when: ping_result is not succeeded
      delegate_to: localhost

- name: Disk and RAM Usage Report
  hosts: reachable_hosts
  become: true
  gather_facts: true

  tasks:
    - name: Get disk usage (excluding snap, overlay, tmpfs)
      ansible.builtin.shell: df -h --output=target,size,used,avail,pcent -x tmpfs -x devtmpfs -x squashfs -x overlay | tail -n +2
      register: disk_usage
      changed_when: false

    - name: Calculate memory usage
      ansible.builtin.set_fact:
        mem_total_mb: "{{ ansible_memtotal_mb }}"
        mem_used_mb: "{{ ansible_memory_mb.real.used }}"
        mem_pct: "{{ ((ansible_memory_mb.real.used / ansible_memtotal_mb) * 100) | round(1) }}"
        swap_total_mb: "{{ ansible_swaptotal_mb }}"
        swap_used_mb: "{{ ansible_swaptotal_mb - ansible_swapfree_mb }}"

    - name: Print report
      ansible.builtin.debug:
        msg: |
          ======================================================
           HOST: {{ inventory_hostname }} ({{ ansible_host }})
           OS:   {{ ansible_distribution }} {{ ansible_distribution_version }}
          ======================================================
           RAM:  {{ mem_used_mb }}MB / {{ mem_total_mb }}MB ({{ mem_pct }}%)
           SWAP: {{ swap_used_mb }}MB / {{ swap_total_mb }}MB
          ------------------------------------------------------
           DISK:
          {{ disk_usage.stdout }}
          ======================================================

    - name: Warn on high disk usage (>85%)
      ansible.builtin.debug:
        msg: "WARNING: {{ item.split()[-1] }} usage on {{ item.split()[0] }} of {{ inventory_hostname }}"
      loop: "{{ disk_usage.stdout_lines }}"
      when: (item.split()[-1] | replace('%','') | int) > 85