using DevExpress.Pdf;
using DevExpress.Drawing;

Stream CreateForm(Stream documentStream, bool createTextBox, bool createComboBox, bool createListBox, bool createCheckBox, bool createRadioGroup) {
    using var processor = new PdfDocumentProcessor();

    processor.LoadDocument(documentStream);
    var formPage = processor.Document.Pages[0];

    using var g = processor.CreateGraphicsPageSystem();
    using var brush = new DXSolidBrush(System.Drawing.Color.Black);
    var titleFont = new DXFont("Arial", 25);
    var labelFont = new DXFont("Arial", 12);

    var stringSize = g.MeasureString("Sample Form", titleFont);
    g.DrawString("Sample Form", titleFont, brush, new System.Drawing.PointF((float)formPage.MediaBox.Width / 2 - stringSize.Width / 2, (float)formPage.MediaBox.Top - 50));

    List<PdfAcroFormField> formFields = new();

    if (createTextBox) {
        g.DrawString("Text Box :", labelFont, brush, new System.Drawing.PointF((float)formPage.MediaBox.Left + 10, 520));

        var textBoxField = PdfAcroFormField.CreateTextBox("TextBox", 1, new PdfRectangle(formPage.MediaBox.Right - 510, 500, formPage.MediaBox.Right - 10, 520));
        textBoxField.Text = "Sample Text";
        textBoxField.Appearance.FontSize = 12;

        formFields.Add(textBoxField);
    }

    if(createComboBox) {
        g.DrawString("Combo Box :", labelFont, brush, new System.Drawing.PointF((float)formPage.MediaBox.Left + 10, 480));

        var comboBoxField = PdfAcroFormField.CreateComboBox("ComboBox", 1, new PdfRectangle(formPage.MediaBox.Right - 510, 460, formPage.MediaBox.Right - 10, 480));
        comboBoxField.AddValue("Item 1");
        comboBoxField.AddValue("Item 2");
        comboBoxField.AddValue("Item 3");
        comboBoxField.SelectValue("Item 1");
        comboBoxField.Appearance.FontSize = 12;

        formFields.Add(comboBoxField);
    }

    if (createListBox) {
        g.DrawString("List Box :", labelFont, brush, new System.Drawing.PointF((float)formPage.MediaBox.Left + 10, 440));

        var listBoxField = PdfAcroFormField.CreateListBox("ListBox", 1, new PdfRectangle(formPage.MediaBox.Right - 510, 380, formPage.MediaBox.Right - 10, 440));
        listBoxField.AddValue("Item 1");
        listBoxField.AddValue("Item 2");
        listBoxField.AddValue("Item 3");
        listBoxField.SelectValue("Item 1");
        listBoxField.Appearance.FontSize = 12;

        formFields.Add(listBoxField);
    }

    if(createCheckBox) {
        g.DrawString("Check Box :", labelFont, brush, new System.Drawing.PointF((float)formPage.MediaBox.Left + 10, 360));

        var checkBoxField = PdfAcroFormField.CreateCheckBox("CheckBox", 1, new PdfRectangle(formPage.MediaBox.Right - 510, 340, formPage.MediaBox.Right - 490, 360));
        checkBoxField.IsChecked = true;

        formFields.Add(checkBoxField);
    }

    if (createRadioGroup) {
        g.DrawString("Radio Group :", labelFont, brush, new System.Drawing.PointF((float)formPage.MediaBox.Left + 10, 320));

        var fieldRadioGroup = PdfAcroFormField.CreateRadioGroup("RadioGroup", 1);
        fieldRadioGroup.AddButton("RadioOption1", new PdfRectangle(formPage.MediaBox.Right - 510, 300, formPage.MediaBox.Right - 490, 320));
        fieldRadioGroup.AddButton("RadioOption2", new PdfRectangle(formPage.MediaBox.Right - 470, 300, formPage.MediaBox.Right - 450, 320));
        fieldRadioGroup.SelectedIndex = 0;

        formFields.Add(fieldRadioGroup);
    }

    g.AddToPageForeground(formPage);
    processor.AddFormFields(formFields);

    var outputStream = new MemoryStream();
    processor.SaveDocument(outputStream);

    outputStream.Position = 0;
    return outputStream;
}