---
- name: Health check on target host
  hosts: all
  become: false
  gather_facts: false
  vars:
    category: monitoring
    subcategory: health
  tasks:
    - name: Check if host is reachable (ping)
      ansible.builtin.ping:
      register: ping_result

    - name: Gather minimal facts
      ansible.builtin.setup:
        gather_subset:
          - '!all'
          - '!min'
          - distribution
      ignore_errors: true
      register: facts_result

    - name: Get system uptime
      ansible.builtin.command: uptime
      register: uptime_result
      changed_when: false
      ignore_errors: true

    - name: Get disk usage
      ansible.builtin.shell: df -h / | tail -1 | awk '{print $5}'
      register: disk_usage
      changed_when: false
      ignore_errors: true

    - name: Get memory usage (Linux)
      ansible.builtin.shell: |
        if command -v free >/dev/null 2>&1; then
          free -m | grep Mem | awk '{printf "%.1f%%", $3/$2 * 100}'
        else
          # Fallback for systems without free command
          cat /proc/meminfo | awk '/MemTotal/{total=$2} /MemAvailable/{avail=$2} END{printf "%.1f%%", (total-avail)/total*100}'
        fi
      register: memory_usage
      changed_when: false
      ignore_errors: true

    - name: Get CPU temperature (ARM/SBC)
      ansible.builtin.shell: |
        if [ -f /sys/class/thermal/thermal_zone0/temp ]; then
          temp=$(cat /sys/class/thermal/thermal_zone0/temp)
          # Use awk instead of bc for better compatibility
          echo "${temp}" | awk '{printf "%.1f°C", $1/1000}'
        else
          echo "N/A"
        fi
      register: cpu_temp
      changed_when: false
      ignore_errors: true

    - name: Get CPU load
      ansible.builtin.shell: |
        if [ -f /proc/loadavg ]; then
          cat /proc/loadavg | awk '{print $1}'
        else
          uptime | awk -F'load average:' '{print $2}' | awk -F',' '{print $1}' | tr -d ' '
        fi
      register: cpu_load
      changed_when: false
      ignore_errors: true

    - name: Display health status
      ansible.builtin.debug:
        msg: |
          ═══════════════════════════════════════
          Host: {{ inventory_hostname }}
          Status: {{ 'OK' if ping_result is success else 'UNREACHABLE' }}
          ═══════════════════════════════════════
          Uptime: {{ uptime_result.stdout | default('N/A') }}
          Disk Usage: {{ disk_usage.stdout | default('N/A') }}
          Memory Usage: {{ memory_usage.stdout | default('N/A') }}
          CPU Load: {{ cpu_load.stdout | default('N/A') }}
          CPU Temp: {{ cpu_temp.stdout | default('N/A') }}
          ═══════════════════════════════════════