Connect-ITDvCenter -Credential $PrvCred
$GuestCredential = Get-Secret -Name GuestCredential
$AllNames = "Windows Server 2019*"
#$AllNames = "zm2019"
Get-Template -Name $AllNames  | Where-Object {$_.Name -notlike "*(Base)*"} | Set-Template -ToVM

#Get-VM -Name $AllNames | New-Snapshot -Name "0_Before Testing"

$VMs = Get-VM -Name $AllNames -server itdvmvc1.nd.gov | Where-Object PowerState -ne "PoweredOn" | Start-VM
Get-VM -Name $AllNames | Wait-Tools | Out-Null
Write-Warning "Tools started"

while ((Get-VM -Name $AllNames).ExtensionData.Guest.GuestOperationsReady -contains $false){start-sleep -seconds 5}
Write-Warning "Guest Operations Ready"

$PowerCliContext = Get-PowerCLIContext
Write-Warning "Wait for 3 minutes"
start-sleep -seconds 180
Write-Warning "Wait complete"

Get-VM -Name $AllNames | ForEach-Object -Parallel {
    Use-PowerCLIContext -PowerCLIContext $using:PowerCliContext -SkipImportModuleChecks
    Get-VM -Name $_.Name | Wait-Tools
    $WUfunc = {
        Write-Host "Search for relevant updates"

        $Updates = New-Object -ComObject Microsoft.Update.UpdateColl
        $Searcher = New-Object -ComObject Microsoft.Update.Searcher
        $Session = New-Object -ComObject Microsoft.Update.Session
        $Criteria = "IsInstalled=0 and Type='Software' and IsAssigned=1"
        #IsAssigned Finds updates that are intended for deployment by Automatic Updates.  This stops Preview updates for Windows and .NET
        # https://docs.microsoft.com/en-us/windows/win32/api/wuapi/nf-wuapi-iupdatesearcher-search
        $Result = $Searcher.Search($Criteria)
        $Updates = $Result.Updates

        $Updates | Sort-Object Title | Select-Object Title

        $Downloader = $Session.CreateUpdateDownloader()
        $Downloader.Updates = $Updates
        $Downloader.Download()

        $Installer = New-Object -ComObject Microsoft.Update.Installer
        $Installer.Updates = $Updates
        $Installer.Install()
        #>
    }

    Get-VM -Name $_.Name | Invoke-VMScript -GuestCredential $using:GuestCredential -ScriptType PowerShell -ScriptText $WUfunc
    Write-Warning ($_.Name + " updates completed, needs reboot...")
}

Get-VM -Name $_.Name | Restart-VMGuest -Confirm:$false | Out-Null

Get-VM -Name $AllNames | Set-VM -ToTemplate