#!/usr/bin/env bash
set -euo pipefail

echo "hostname: $(hostname)"
echo "uptime: $(uptime -p)"
echo "os: $(lsb_release -ds)"
echo "kernel: $(uname -r)"
echo "architecture: $(uname -m)"

# CPU Info
echo "cpu:"
echo "  model: $(lscpu | awk -F: '/Model name/ {print $2}' | xargs)"
echo "  cores: $(nproc)"
echo "  threads: $(lscpu | awk -F: '/^CPU\(s\)/ {print $2}' | xargs)"
# Frequency fallback: lscpu -> /proc/cpuinfo
freq=$(lscpu | awk -F: '/^CPU MHz/ { gsub(/^[ \t]+/, "", $2); printf "%.2f", $2 / 1000 }' 2>/dev/null)
if [[ -z "$freq" ]]; then
  freq=$(awk -F: '/cpu MHz/ {print $2; exit}' /proc/cpuinfo | awk '{printf "%.2f", $1 / 1000}')
fi
echo "  frequency_ghz: ${freq:-unknown}"

# Memory Info
mem_total=$(free -g | awk '/^Mem:/ {print $2}')
mem_free=$(free -g | awk '/^Mem:/ {print $4}')
if [[ "$mem_total" == "0" ]]; then
  mem_total=$(free -m | awk '/^Mem:/ {printf "%.1f", $2 / 1024}')
  mem_free=$(free -m | awk '/^Mem:/ {printf "%.1f", $4 / 1024}')
fi
echo "memory_gb:"
echo "  total: $mem_total"
echo "  free: $mem_free"

# Disk Devices (excluding loop and ram)
echo "disks:"
lsblk -dno NAME,SIZE,MODEL | grep -Ev '^loop|^ram' | while read -r name size model; do
  echo "  - device: /dev/$name"
  echo "    size: \"$size\""
  echo "    model: \"${model:-unknown}\""
done

# Disk usage (real mount size, partition-aware)
echo "disk_usage:"
lsblk -o NAME,SIZE,FSTYPE,MOUNTPOINT -nr | grep -vE '^loop|^ram' | while read -r name size fstype mount; do
  if [ -n "$mount" ]; then
    echo "  - mount: \"$mount\""
    echo "    device: \"/dev/$name\""
    echo "    size: \"$size\""
    echo "    fstype: \"$fstype\""
  fi
done

# Network Interfaces
echo "network_interfaces:"
ip -o -4 addr show | awk '!/ lo / {print "  - iface: \"" $2 "\"\n    ip: \"" $4 "\"" }'

# Machine ID
echo "machine_id: $(cat /etc/machine-id)"