//go:build windows

package main

import (
	"encoding/json"
	"os/exec"
	"strings"
)

func collectHardwareComponents() (map[string]string, error) {
	components := map[string]string{}

	script := `
$ErrorActionPreference = 'SilentlyContinue'
$cs = Get-CimInstance Win32_ComputerSystemProduct
$bb = Get-CimInstance Win32_BaseBoard
$bios = Get-CimInstance Win32_BIOS
$cpu = Get-CimInstance Win32_Processor | Select-Object -First 1
$disk = Get-CimInstance Win32_DiskDrive | Where-Object { $_.Index -eq 0 } | Select-Object -First 1
[pscustomobject]@{
  smbiosUuid = [string]$cs.UUID
  baseboardSerial = [string]$bb.SerialNumber
  biosSerial = [string]$bios.SerialNumber
  cpuId = [string]$cpu.ProcessorId
  systemDiskSerial = [string]$disk.SerialNumber
} | ConvertTo-Json -Compress
`
	command := exec.Command(
		"powershell.exe",
		"-NoProfile",
		"-NonInteractive",
		"-ExecutionPolicy", "Bypass",
		"-Command", script,
	)
	hideCommandWindow(command)
	output, err := command.Output()
	if err == nil {
		var payload map[string]string
		if json.Unmarshal([]byte(strings.TrimSpace(string(output))), &payload) == nil {
			for key, value := range payload {
				if normalized := normalizeComponent(value); normalized != "" {
					components[key] = normalized
				}
			}
		}
	}

	if machineGUID := readMachineGUID(); machineGUID != "" {
		components["machineGuid"] = machineGUID
	}
	if err := ensureNotEmpty(components); err != nil {
		return nil, err
	}
	return components, nil
}

func readMachineGUID() string {
	command := exec.Command(
		"reg", "query", `HKLM\SOFTWARE\Microsoft\Cryptography`, "/v", "MachineGuid",
	)
	hideCommandWindow(command)
	output, err := command.Output()
	if err != nil {
		return ""
	}
	line := strings.TrimSpace(string(output))
	for _, candidate := range strings.Split(line, "\n") {
		fields := strings.Fields(strings.TrimSpace(candidate))
		if len(fields) >= 3 && strings.EqualFold(fields[0], "MachineGuid") {
			return normalizeComponent(strings.Join(fields[2:], " "))
		}
	}
	return ""
}