#Requires -RunAsAdministrator

try {
    $session = New-CimSession
    $serial = (Get-CimInstance -CimSession $session -Class Win32_BIOS).SerialNumber
    $devDetail = (Get-CimInstance -CimSession $session -Namespace root/cimv2/mdm/dmmap `
        -Class MDM_DevDetail_Ext01 -Filter "InstanceID='Ext' AND ParentID='./DevDetail'")
        
    if (-not $devDetail) {
        $err = [Management.Automation.ErrorRecord]::new(
            "Unable to retrieve device hardware details",
            "DevDetailNullError",
            [Management.Automation.ErrorCategory]::DeviceError,
            $null
        )
        throw $err
    }

    if ([string]::IsNullOrEmpty($devDetail.DeviceHardwareData)) {
        $err = [Management.Automation.ErrorRecord]::new(
            "Unable to retrieve device hardware hash",
            "DevHardwareDataNullOrEmptyError",
            [Management.Automation.ErrorCategory]::DeviceError,
            $null
        )
        throw $err
    }

    $c = New-Object PSObject -Property @{
        "Device Serial Number" = $serial
        "Windows Product ID"   = ""
        "Hardware Hash"        = $devDetail.DeviceHardwareData
        "Group Tag"            = "CHANGEME"
    }

    $outputPath = "C:\tmp"

    if (-not (Test-Path -Path $outputPath)) {
        New-Item -ItemType Directory -Path $outputPath
    }

    Push-Location $outputPath

    $output = $c |
        Select-Object "Device Serial Number", "Windows Product ID", "Hardware Hash", `
            "Group Tag" |
                ConvertTo-CSV -NoTypeInformation |
                ForEach-Object { $_ -replace '"', '' }

    $output | Out-File -FilePath "$($serial).csv"
    Write-Output "Hardware ID saved as $($serial).csv"
    
    Invoke-Item .
    
    Pop-Location
}
catch {
    $PSCmdlet.ThrowTerminatingError($_)
}
finally {
    Remove-CimSession $session
}