Set-StrictMode -Version Latest
$ErrorActionPreference = "Stop"

$InputDir        = "C:\PDF\IN"
$ExportDir       = "C:\PDF\OUT"
$ErrorDir        = "C:\PDF\ERROR"
$TempDir         = "C:\PDF\TEMP"

$WatermarkPdf    = "C:\PDF\briefpapier.pdf"      # MUSS 2 Seiten haben (1+2)
$ITextDllDir     = "C:\Tools\itext_bundle\publish"
$WorkerScript    = "C:\PDF\pdf_worker.ps1"

$DeleteOriginalAfterSuccess = $true
$AddDebugMarker = $true   # setzt klein "WM1"/"WM2" ins PDF, damit du es siehst

function Initialize-Directories {
  foreach ($d in @($InputDir, $ExportDir, $ErrorDir, $TempDir)) {
    if (-not (Test-Path $d)) { New-Item -ItemType Directory -Path $d | Out-Null }
  }
}

function New-SafeOutputName {
  param([Parameter(Mandatory)] [string] $InputPath, [Parameter(Mandatory)] [string] $OutDir)
  $base = [IO.Path]::GetFileNameWithoutExtension($InputPath)
  $ext  = [IO.Path]::GetExtension($InputPath)
  $out  = Join-Path $OutDir ($base + $ext)
  if (-not (Test-Path $out)) { return $out }
  $ts = Get-Date -Format "yyyyMMdd_HHmmss_fff"
  return Join-Path $OutDir ("{0}_{1}{2}" -f $base, $ts, $ext)
}

function Quote-Arg([string]$s) {
  if ($null -eq $s) { return '""' }
  '"' + ($s -replace '"','\"') + '"'
}

Initialize-Directories

if (-not (Test-Path $WorkerScript)) { throw "Worker-Script fehlt: $WorkerScript" }
if (-not (Test-Path $WatermarkPdf)) { throw "Wasserzeichen-Datei fehlt: $WatermarkPdf" }
if (-not (Test-Path $ITextDllDir))  { throw "ITextDllDir fehlt: $ITextDllDir" }

$runLog = Join-Path $ErrorDir ("run_{0}.log" -f (Get-Date -Format "yyyyMMdd_HHmmss"))
# Logfile garantiert anlegen, damit “keine Log-Datei” ausgeschlossen ist
[System.IO.File]::WriteAllText($runLog, ("[{0}] RUN START`r`n" -f (Get-Date)))

$files = @(Get-ChildItem -LiteralPath $InputDir -Filter "*.pdf" -File -Force | Sort-Object LastWriteTime)
if ($files.Count -eq 0) {
  Write-Host "Keine PDFs gefunden in: $InputDir"
  Write-Host "Log: $runLog"
  exit 0
}

Write-Host ("Gefunden: {0} PDF(s)" -f $files.Count)
Write-Host "Log: $runLog"

foreach ($file in $files) {
  $tempOut  = New-SafeOutputName -InputPath $file.FullName -OutDir $TempDir
  $finalOut = New-SafeOutputName -InputPath $file.FullName -OutDir $ExportDir

  Write-Host ("Worker startet: {0}" -f $file.Name)

  # WICHTIG: Argumente als EIN String mit sicherem Quoting -> keine Param-Zerlegung bei Leerzeichen
  $argString = @(
    "-NoProfile",
    "-ExecutionPolicy Bypass",
    "-File", (Quote-Arg $WorkerScript),
    "-InputPdf", (Quote-Arg $file.FullName),
    "-OutputPdf", (Quote-Arg $tempOut),
    "-WatermarkPdf", (Quote-Arg $WatermarkPdf),
    "-ITextDllDir", (Quote-Arg $ITextDllDir),
    "-LogFile", (Quote-Arg $runLog),
    "-AddDebugMarker", (Quote-Arg ($AddDebugMarker.ToString()))
  ) -join " "

  $p = Start-Process -FilePath "pwsh.exe" -ArgumentList $argString -Wait -PassThru -WindowStyle Hidden

  if ($p.ExitCode -eq 0 -and (Test-Path $tempOut)) {
    Move-Item -LiteralPath $tempOut -Destination $finalOut -Force
    if ($DeleteOriginalAfterSuccess) { Remove-Item -LiteralPath $file.FullName -Force }
    Write-Host ("OK: {0}" -f $file.Name)
  }
  else {
    if (Test-Path $tempOut) { Remove-Item -LiteralPath $tempOut -Force -ErrorAction SilentlyContinue }
    $errDest = New-SafeOutputName -InputPath $file.FullName -OutDir $ErrorDir
    try { Move-Item -LiteralPath $file.FullName -Destination $errDest -Force } catch {}
    Write-Host ("FAIL (ExitCode {0}): {1}" -f $p.ExitCode, $file.Name)
  }
}

Write-Host "Fertig."
Write-Host "Log: $runLog"