Add-Type -AssemblyName System.Windows.Forms
Add-Type -AssemblyName System.Drawing

$form = New-Object System.Windows.Forms.Form
$form.Text = "Haruna's NTFS-ACL Finder"
$form.Size = New-Object System.Drawing.Size(700, 600)
$form.StartPosition = "CenterScreen"

$global:CancelSearch = $false
$global:Results = @()

$labelUser = New-Object System.Windows.Forms.Label
$labelUser.Text = "Benutzer oder Gruppe (z.B. azubi_hr):"
$labelUser.Location = New-Object System.Drawing.Point(10, 20)
$labelUser.Size = New-Object System.Drawing.Size(680, 20)
$form.Controls.Add($labelUser)

$textBoxUser = New-Object System.Windows.Forms.TextBox
$textBoxUser.Location = New-Object System.Drawing.Point(10, 45)
$textBoxUser.Size = New-Object System.Drawing.Size(660, 20)
$form.Controls.Add($textBoxUser)

$buttonBrowse = New-Object System.Windows.Forms.Button
$buttonBrowse.Text = "Pfad wählen"
$buttonBrowse.Location = New-Object System.Drawing.Point(10, 75)
$form.Controls.Add($buttonBrowse)

$labelPath = New-Object System.Windows.Forms.Label
$labelPath.Text = "Kein Pfad ausgewählt"
$labelPath.Location = New-Object System.Drawing.Point(110, 80)
$labelPath.Size = New-Object System.Drawing.Size(560, 20)
$form.Controls.Add($labelPath)

$folderBrowser = New-Object System.Windows.Forms.FolderBrowserDialog
$buttonBrowse.Add_Click({
    if ($folderBrowser.ShowDialog() -eq "OK") {
        $labelPath.Text = $folderBrowser.SelectedPath
    }
})

$labelDepth = New-Object System.Windows.Forms.Label
$labelDepth.Text = "Maximale Suchtiefe (0 = unbegrenzt):"
$labelDepth.Location = New-Object System.Drawing.Point(10, 110)
$labelDepth.Size = New-Object System.Drawing.Size(250, 20)
$form.Controls.Add($labelDepth)

$textBoxDepth = New-Object System.Windows.Forms.TextBox
$textBoxDepth.Text = "0"
$textBoxDepth.Location = New-Object System.Drawing.Point(270, 110)
$textBoxDepth.Size = New-Object System.Drawing.Size(50, 20)
$form.Controls.Add($textBoxDepth)

$statusLabel = New-Object System.Windows.Forms.Label
$statusLabel.Text = "Bereit."
$statusLabel.Location = New-Object System.Drawing.Point(10, 140)
$statusLabel.Size = New-Object System.Drawing.Size(680, 20)
$form.Controls.Add($statusLabel)

$listBox = New-Object System.Windows.Forms.ListBox
$listBox.Location = New-Object System.Drawing.Point(10, 170)
$listBox.Size = New-Object System.Drawing.Size(660, 300)
$listBox.HorizontalScrollbar = $true
$form.Controls.Add($listBox)

$buttonStart = New-Object System.Windows.Forms.Button
$buttonStart.Text = "Suche starten"
$buttonStart.Location = New-Object System.Drawing.Point(10, 490)
$form.Controls.Add($buttonStart)

$buttonCancel = New-Object System.Windows.Forms.Button
$buttonCancel.Text = "Abbrechen"
$buttonCancel.Location = New-Object System.Drawing.Point(130, 490)
$buttonCancel.Enabled = $false
$form.Controls.Add($buttonCancel)

$buttonExport = New-Object System.Windows.Forms.Button
$buttonExport.Text = "Exportieren als CSV"
$buttonExport.Location = New-Object System.Drawing.Point(250, 490)
$form.Controls.Add($buttonExport)

function Search-Folder {
    param (
        [string]$path,
        [string]$searchTerm,
        [int]$depth,
        [int]$maxDepth
    )
    if ($global:CancelSearch) { return }
    if ($maxDepth -gt 0 -and $depth -ge $maxDepth) { return }

    $statusLabel.Text = "Verarbeite: $path"
    [System.Windows.Forms.Application]::DoEvents()

    try {
        $items = Get-ChildItem -LiteralPath $path -Force -ErrorAction SilentlyContinue
        foreach ($item in $items) {
            if ($global:CancelSearch) { return }

            $statusLabel.Text = "Verarbeite: $($item.FullName)"
            [System.Windows.Forms.Application]::DoEvents()

            try {
                $acl = Get-Acl $item.FullName
                foreach ($entry in $acl.Access) {
                    if ($entry.IdentityReference -match $searchTerm) {
                        $result = [PSCustomObject]@{
                            Pfad = $item.FullName
                            BenutzerOderGruppe = $entry.IdentityReference.ToString()
                        }
                        $global:Results += $result
                        $listBox.Items.Add("$($result.Pfad) → $($result.BenutzerOderGruppe)")
                    }
                }
            } catch {}

            if ($item.PSIsContainer) {
                Search-Folder -path $item.FullName -searchTerm $searchTerm -depth ($depth + 1) -maxDepth $maxDepth
            }
        }
    } catch {}
}

$buttonStart.Add_Click({
    $listBox.Items.Clear()
    $global:Results = @()
    $global:CancelSearch = $false
    $statusLabel.Text = "Suche gestartet..."
    $buttonCancel.Enabled = $true

    $searchTerm = $textBoxUser.Text.Trim()
    $startPath = $labelPath.Text
    $maxDepth = 0
    if (-not [int]::TryParse($textBoxDepth.Text.Trim(), [ref]$maxDepth)) {
        $maxDepth = 0
    }

    if (-not (Test-Path $startPath)) {
        [System.Windows.Forms.MessageBox]::Show("Ungültiger Pfad!", "Fehler")
        return
    }

    Search-Folder -path $startPath -searchTerm $searchTerm -depth 0 -maxDepth $maxDepth

    if ($global:CancelSearch) {
        $statusLabel.Text = "Suche abgebrochen."
    } else {
        $statusLabel.Text = "Suche abgeschlossen."
    }
    $buttonCancel.Enabled = $false
})

$buttonCancel.Add_Click({
    $global:CancelSearch = $true
    $statusLabel.Text = "Abbruch angefordert..."
    $buttonCancel.Enabled = $false
})

$buttonExport.Add_Click({
    if ($global:Results.Count -eq 0) {
        [System.Windows.Forms.MessageBox]::Show("Keine Ergebnisse zum Exportieren.", "Hinweis")
        return
    }
    $saveDialog = New-Object System.Windows.Forms.SaveFileDialog
    $saveDialog.Filter = "CSV-Dateien (*.csv)|*.csv"
    $saveDialog.Title = "Speichern unter..."
    $saveDialog.FileName = "ACL-Ergebnisse.csv"
    if ($saveDialog.ShowDialog() -eq "OK") {
        $global:Results | Export-Csv -Path $saveDialog.FileName -NoTypeInformation -Encoding UTF8
        [System.Windows.Forms.MessageBox]::Show("Ergebnisse wurden gespeichert.", "Export erfolgreich")
    }
})

$form.Topmost = $true
[void]$form.ShowDialog()