$DriverInfPath   = "\\domain_name\SYSVOL\domain_name\Drivers\Printer_Driver\driver_info.inf"
$DriverName      = "Global Print Driver PCL6"  
# must match Get-PrinterDriver name

$CentralLogDir   = "\\domain_name\SYSVOL\domain_name\scripts\Printers\Logs"
$LocalLogDir     = "C:\ProgramData\PrinterDeploy\Logs"
$LogFile         = Join-Path $LocalLogDir "Deploy-PrinterDriver_$(Get-Date -Format 'yyyyMMdd').log"


New-Item -ItemType Directory -Path $LocalLogDir -Force | Out-Null

function Write-Log {
    param([string]$Message, [string]$Level = "INFO")
    $line = "[{0}] [{1}] {2}" -f (Get-Date -Format "yyyy-MM-dd HH:mm:ss"), $Level, $Message
    $line | Tee-Object -FilePath $LogFile -Append
    try {
        Write-EventLog -LogName Application -Source "PrinterDeployGPO" -EventId 1000 -EntryType Information -Message $line -ErrorAction SilentlyContinue
    } catch {}
}

try {
    if (-not [System.Diagnostics.EventLog]::SourceExists("PrinterDeployGPO")) {
        New-EventLog -LogName Application -Source "PrinterDeployGPO"
    }
} catch {}

Write-Log "Starting Deploy-PrinterDriver script."

if (-not (Test-Path $DriverInfPath)) {
    Write-Log "Driver INF not found: $DriverInfPath" "ERROR"
    exit 1
}

$existingDriver = Get-PrinterDriver -ErrorAction SilentlyContinue | Where-Object { $_.Name -eq $DriverName }
if ($existingDriver) {
    Write-Log "Driver '$DriverName' already installed. Skipping driver install."
} else {
    Write-Log "Driver '$DriverName' not installed. Attempting installation via pnputil..."
    $pnputilAddArgs = "/add-driver `"$DriverInfPath`" /install"
    $process = Start-Process -FilePath "pnputil.exe" -ArgumentList $pnputilAddArgs -Wait -PassThru -WindowStyle Hidden
    if ($process.ExitCode -eq 0) {
        Write-Log "pnputil installed driver from INF successfully."
    } else {
        Write-Log "pnputil failed with ExitCode=$($process.ExitCode). Attempting fallback via Add-PrinterDriver..." "WARN"
        try {
            Add-PrinterDriver -Name $DriverName -InfPath $DriverInfPath -ErrorAction Stop
            Write-Log "Add-PrinterDriver installed driver successfully."
        } catch {
            Write-Log "Add-PrinterDriver failed: $($_.Exception.Message)" "ERROR"
            exit 2
        }
    }
}

if (-not $InstallPrinter) {
    Write-Log "Configured to install driver only. Exiting."
    goto :CopyLog
}

:CopyLog
try {
    if (-not (Test-Path $CentralLogDir)) {
        New-Item -ItemType Directory -Path $CentralLogDir -Force | Out-Null
    }
    $dest = Join-Path $CentralLogDir ("{0}_{1}.log" -f $env:COMPUTERNAME, (Get-Date -Format "yyyyMMddHHmmss"))
    Copy-Item -Path $LogFile -Destination $dest -ErrorAction SilentlyContinue
} catch {}

Write-Log "Deploy-PrinterDriver script completed."
exit 0
``