// EngageLive Google Slides Add-on
// Sidebar integration to host live sessions during presentations

/**
 * Called when the add-on is opened via Extensions menu
 */
function onOpen(e) {
  SlidesApp.getUi()
    .createAddonMenu()
    .addItem('🎯 Open EngageLive', 'showSidebar')
    .addItem('📱 Insert QR Code', 'insertQRCode')
    .addSeparator()
    .addItem('❓ Help', 'openHelp')
    .addToUi();
}

/**
 * Required for editor add-ons
 */
function onFileScopeGranted(e) {
  showSidebar();
}

/**
 * Open the EngageLive sidebar
 */
function showSidebar() {
  var html = HtmlService.createHtmlOutputFromFile('sidebar')
    .setTitle('EngageLive')
    .setWidth(320);
  SlidesApp.getUi().showSidebar(html);
}

/**
 * Insert a QR code image onto the current slide
 * Called from the sidebar via google.script.run
 */
function insertQRCode(sessionCode) {
  var code = sessionCode || promptForCode();
  if (!code) return { success: false, error: 'No session code provided' };

  try {
    var presentation = SlidesApp.getActivePresentation();
    var slide = presentation.getSelection().getCurrentPage();
    if (!slide) slide = presentation.getSlides()[0];

    var joinUrl = 'https://postlister.com/engagelive/?join=' + code;
    var qrUrl = 'https://chart.googleapis.com/chart?cht=qr&chs=300x300&chl=' + 
                encodeURIComponent(joinUrl) + '&choe=UTF-8';

    // Insert QR code image
    var image = slide.insertImage(qrUrl, 50, 80, 200, 200);
    
    // Insert session code label below
    var textBox = slide.insertTextBox(
      'Scan to join\nCode: ' + code,
      50, 285, 200, 55
    );
    var style = textBox.getText().getTextStyle();
    style.setFontSize(14);
    style.setBold(true);
    style.setForegroundColor('#E8400C');
    textBox.getText().getParagraphs()[0]
      .getRange().getTextStyle().setFontSize(12);

    presentation.saveAndClose();
    return { success: true, message: 'QR code inserted on slide!' };
  } catch(e) {
    return { success: false, error: e.toString() };
  }
}

function promptForCode() {
  var ui = SlidesApp.getUi();
  var result = ui.prompt(
    'Insert QR Code',
    'Enter your EngageLive session code:',
    ui.ButtonSet.OK_CANCEL
  );
  if (result.getSelectedButton() === ui.Button.OK) {
    return result.getResponseText().trim().toUpperCase();
  }
  return null;
}

function openHelp() {
  var html = HtmlService.createHtmlOutput(
    '<script>window.open("https://postlister.com/engagelive/help.html","_blank");google.script.host.close();</script>'
  );
  SlidesApp.getUi().showModalDialog(html, 'Opening help...');
}

/**
 * Get current user email (for pre-filling host form)
 */
function getUserEmail() {
  try {
    return Session.getActiveUser().getEmail() || '';
  } catch(e) {
    return '';
  }
}