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

echo "Device info:"

chip="$(sysctl -n machdep.cpu.brand_string 2>/dev/null || true)"
if [[ -z "$chip" ]]; then
	chip="Unknown"
fi
echo "$chip"

mem_bytes="$(sysctl -n hw.memsize 2>/dev/null || true)"
if [[ -n "$mem_bytes" ]]; then
	mem="$(awk -v b="$mem_bytes" 'BEGIN { if (b>0) printf "%.0f GB", b/1073741824 }')"
fi
if [[ -z "$mem" ]]; then
	mem="Unknown"
fi
echo "$mem"

echo $(ioreg -rd1 -c IOPlatformExpertDevice | grep '"IOPlatformSerialNumber" = "') | awk -F\" '{print $4}'

os_name="$(sw_vers -productName 2>/dev/null || true)"
os_version="$(sw_vers -productVersion 2>/dev/null || true)"
if [[ -n "$os_name" && -n "$os_version" ]]; then
	echo "$os_name $os_version"
else
	echo "Unknown"
fi

battery_health="$(ioreg -l 2>/dev/null | grep -E '"DesignCapacity" =|"AppleRawMaxCapacity"' | grep -o '[0-9]*' | tr '\n' ',' | awk -F',' '{print (int(($2/$1)*1000 + 0.5)/10 "% battery health")}')"
if [[ -z "$battery_health" ]]; then
	battery_health="Unknown battery health"
fi
echo "$battery_health"