background.js

// Create offscreen document for geolocation
async function createOffscreenDocument() {
  if (await chrome.offscreen.hasDocument()) return;
  await chrome.offscreen.createDocument({
    url: 'offscreen.html',
    reasons: ['GEOLOCATION'],
    justification: 'Get user location for solar clock'
  });
}

// Open side panel when extension is installed
chrome.runtime.onInstalled.addListener(() => {
  // Set panel behavior
  chrome.sidePanel.setPanelBehavior({ openPanelOnActionClick: true });

  // Set panel options
  chrome.sidePanel.setOptions({
    enabled: true,
    path: 'index.html'
  });
});

// Handle location requests from the popup
chrome.runtime.onMessage.addListener((request, sender, sendResponse) => {
  if (request.type === 'GET_LOCATION') {
    // Create offscreen document and request location
    createOffscreenDocument().then(() => {
      chrome.runtime.sendMessage({ type: 'GET_LOCATION' });
    });
    return true;
  }

  if (request.type === 'LOCATION_RESULT') {
    // Clean up offscreen document
    chrome.offscreen.closeDocument();

    // Forward the result to the popup
    if (request.error) {
      sendResponse({ error: request.error });
    } else {
      sendResponse(request.data);
    }
    return true;
  }
});