// Function to save AI document as a layered PDF
function saveAsLayeredPDF(doc, pdfFilePath) {
  try {
    // Define PDF save options
    var pdfSaveOpts = new PDFSaveOptions();
    pdfSaveOpts.compatibility = PDFCompatibility.ACROBAT6; // PDF compatibility
    pdfSaveOpts.generateThumbnails = true; // Generate PDF thumbnails
    pdfSaveOpts.preserveEditability = true; // Preserve Illustrator editing capabilities
    pdfSaveOpts.viewAfterSaving = false; // Do not open the PDF after saving
    pdfSaveOpts.layers = true; // Preserve Illustrator layers

    // Save the document as PDF
    doc.saveAs(new File(pdfFilePath), pdfSaveOpts);
    return true;
  } catch (e) {
    alert("Error saving as PDF: " + e);
    return false;
  }
}

// Function to process each AI file
function processAIFile(filePath, outputFolder) {
  try {
    // Open the AI file
    var doc = app.open(filePath);

    // Construct the output PDF file path
    var pdfFileName = doc.name.replace(/\.ai$/i, '') + "_layered.pdf";
    var pdfFilePath = outputFolder + "/" + pdfFileName;

    // Save AI document as a layered PDF
    var savedSuccessfully = saveAsLayeredPDF(doc, pdfFilePath);

    // Close the document without saving changes
    doc.close(SaveOptions.DONOTSAVECHANGES);

    if (savedSuccessfully) {
      alert("Converted to PDF: " + pdfFileName);
    } else {
      alert("Failed to convert to PDF: " + doc.name);
    }
  } catch (e) {
    alert("Error processing file: " + filePath);
  }
}

// Main function to process AI files in a folder
function processAIFolder(folderPath, outputFolder) {
  var folder = new Folder(folderPath);

  // Check if the folder exists
  if (folder.exists) {
    var files = folder.getFiles("*.ai");

    // Loop through each file in the folder
    for (var i = 0; i < files.length; i++) {
      var file = files[i];

      // Process AI file
      if (file instanceof File) {
        processAIFile(file, outputFolder);
      }
    }

    // Alert when processing is complete
    alert("Finished processing AI files.");
  } else {
    alert("Folder does not exist: " + folderPath);
  }
}

// Example usage:
var inputFolderPath = "~/Downloads"; // Specify the input folder path
var outputFolderPath = "~/Downloads"; // Specify the output folder path

processAIFolder(inputFolderPath, outputFolderPath);