# Erforderliche Assemblies laden
Add-Type -AssemblyName System.Windows.Forms
Add-Type -AssemblyName System.Drawing

# Formular erstellen
$form = New-Object System.Windows.Forms.Form
$form.Text = "Benutzer- und SA-Erstellung"
$form.Size = New-Object System.Drawing.Size(1200, 650)
$form.StartPosition = "CenterScreen"
$form.BackColor = [System.Drawing.Color]::White

# DataGridView erstellen
$dataGridView = New-Object System.Windows.Forms.DataGridView
$dataGridView.Size = New-Object System.Drawing.Size(1150, 450)
$dataGridView.Location = New-Object System.Drawing.Point(15, 15)
$dataGridView.ColumnCount = 8

# Spaltenüberschriften festlegen
$dataGridView.Columns[0].Name = "Type"
$dataGridView.Columns[1].Name = "FirstName"
$dataGridView.Columns[2].Name = "LastName"
$dataGridView.Columns[3].Name = "Name"
$dataGridView.Columns[4].Name = "SAMAccountName"
$dataGridView.Columns[5].Name = "UPN"
$dataGridView.Columns[6].Name = "OU"
$dataGridView.Columns[7].Name = "DC"

# Beispielzeilen hinzufügen
$dataGridView.Rows.Add("User", "", "", "", "", "", "", "")
$dataGridView.Rows.Add("SA", "", "", "", "", "", "", "")

# DataGridView anpassen
$dataGridView.AlternatingRowsDefaultCellStyle.BackColor = [System.Drawing.Color]::LightGray

# Eventhandler hinzufügen, um Name und SAMAccountName in Echtzeit zu generieren
$dataGridView.add_CellEndEdit({
    param ($sender, $e)
    $row = $dataGridView.Rows[$e.RowIndex]
    
    # Name generieren
    if ($row.Cells["FirstName"].Value -ne $null -and $row.Cells["LastName"].Value -ne $null -and $row.Cells["FirstName"].Value -ne "" -and $row.Cells["LastName"].Value -ne "") {
        $row.Cells["Name"].Value = $row.Cells["FirstName"].Value + " " + $row.Cells["LastName"].Value
        $samAccountName = $row.Cells["FirstName"].Value.Substring(0, 1).ToLower() + $row.Cells["LastName"].Value.ToLower()
        $row.Cells["SAMAccountName"].Value = $samAccountName
        
        # UPN generieren
        $dcParts = $row.Cells["DC"].Value -replace "DC=", "" -split ","
        $upnDomain = ($dcParts -join ".").ToLower()
        $row.Cells["UPN"].Value = "$samAccountName@$upnDomain"
    }

    # Alle Felder außer Type ein- oder ausblenden
    if ($row.Cells["Type"].Value -ne 'User' -and $row.Cells["Type"].Value -ne 'SA' -and $row.Cells["Type"].Value -ne 'Master') {
        for ($i = 1; $i -lt $row.Cells.Count; $i++) {
            $row.Cells[$i].Style.BackColor = $form.BackColor
            $row.Cells[$i].Style.ForeColor = $form.BackColor
        }
    } else {
        for ($i = 1; $i -lt $row.Cells.Count; $i++) {
            $row.Cells[$i].Style.BackColor = [System.Drawing.Color]::White
            $row.Cells[$i].Style.ForeColor = [System.Drawing.Color]::Black
        }
    }

    # FirstName und LastName-Feld durchsichtig machen oder ausblenden, wenn Typ SA oder Master ist
    if ($row.Cells["Type"].Value -eq 'SA' -or $row.Cells["Type"].Value -eq 'Master') {
        $row.Cells["FirstName"].Style.BackColor = $form.BackColor
        $row.Cells["FirstName"].Style.ForeColor = $form.BackColor
        $row.Cells["LastName"].Style.BackColor = $form.BackColor
        $row.Cells["LastName"].Style.ForeColor = $form.BackColor
    } else {
        $row.Cells["FirstName"].Style.BackColor = [System.Drawing.Color]::White
        $row.Cells["FirstName"].Style.ForeColor = [System.Drawing.Color]::Black
        $row.Cells["LastName"].Style.BackColor = [System.Drawing.Color]::White
        $row.Cells["LastName"].Style.ForeColor = [System.Drawing.Color]::Black
    }
})

# OK-Button
$okButton = New-Object System.Windows.Forms.Button
$okButton.Text = "OK"
$okButton.Location = New-Object System.Drawing.Point(550, 500)
$okButton.BackColor = [System.Drawing.Color]::White
$okButton.FlatStyle = "Flat"
$okButton.Add_Click({
    $form.Close()
})
$form.Controls.Add($okButton)

# DataGridView zum Formular hinzufügen
$form.Controls.Add($dataGridView)

# Formular anzeigen
$form.ShowDialog()

# Eingabedaten extrahieren
$data = @()
foreach ($row in $dataGridView.Rows) {
    if (-not $row.IsNewRow) {
        $data += [PSCustomObject]@{
            Type = $row.Cells[0].Value
            FirstName = $row.Cells[1].Value
            LastName = $row.Cells[2].Value
            Name = $row.Cells[3].Value
            SAMAccountName = $row.Cells[4].Value
            UPN = $row.Cells[5].Value
            OU = $row.Cells[6].Value
            DC = $row.Cells[7].Value
        }
    }
}

# Für jede Zeile den ersten darüberliegenden Master-Eintrag finden
foreach ($row in $data) {
    if ($row.Type -ne 'Master') {
        $aboveMasterRow = $null
        for ($i = ($data.IndexOf($row) - 1); $i -ge 0; $i--) {
            if ($data[$i].Type -eq 'Master') {
                $aboveMasterRow = $data[$i]
                break
            }
        }
        
        $ou = if ($row.OU) { $row.OU } else { $aboveMasterRow.OU }
        $dc = if ($row.DC) { $row.DC } else { $aboveMasterRow.DC }
        $row.OU = $ou
        $row.DC = $dc
    }
}

# Listen für vorhandene Benutzer
$existingUsers = @()

# Durchlaufen jeder Zeile der Daten
foreach ($row in $data) {
    if ($row.Type -ne 'Master') {
        $path = "OU=$($row.OU),DC=$($row.DC)"

        if ($row.Type -eq 'User' -or $row.Type -eq 'SA') {
            # Name aus FirstName und LastName generieren, falls nicht vorhanden
            $name = if ($row.Name) { $row.Name } else { $row.FirstName + " " + $row.LastName }

            # SAMAccountName und UPN generieren
            $samAccountName = $row.FirstName.Substring(0, 1).ToLower() + $row.LastName.ToLower()
            $dcParts = $row.DC -replace "DC=", "" -split ","
            $upnDomain = ($dcParts -join ".").ToLower()
            $upn = "$samAccountName@$upnDomain"
            $row.SAMAccountName = $samAccountName
            $row.UPN = $upn

            # Überprüfen, ob der Benutzer bereits existiert
            if (Get-ADUser -Filter "SamAccountName -eq '$($row.SAMAccountName)'") {
                $existingUsers += $row.SAMAccountName
            } else {
                # Erstellung des Benutzers
                New-ADUser -Name $name -GivenName $row.FirstName -Surname $row.LastName -SamAccountName $row.SAMAccountName -UserPrincipalName $row.UPN -Path $path -AccountPassword (ConvertTo-SecureString "P@ssword1" -AsPlainText -Force) -Enabled $true
            }
        }
    }
}

# Zusammenfassung der vorhandenen Benutzer
Write-Host "`nBereits vorhandene Benutzer:" -ForegroundColor Red
$existingUsers | ForEach-Object { Write-Host $_ -ForegroundColor Red }