// Side Notes — Background Service Worker
//
// Responsibilities:
//  - Set up side panel behavior on install.
//  - Detect in-page navigation (SPA pushState/replaceState, hash changes)
//    and notify any open side panel for the affected tab to reload its note.

import { buildNoteKey } from './shared/key-builder.js';

// ---------------------------------------------------------------------------
// Install
// ---------------------------------------------------------------------------
chrome.runtime.onInstalled.addListener(() => {
  chrome.sidePanel.setPanelBehavior({ openPanelOnActionClick: true });
});

// ---------------------------------------------------------------------------
// In-page navigation detection (SPA support)
// ---------------------------------------------------------------------------
const bc = new BroadcastChannel('side-notes');

function notifyTab(tabId, url) {
  const key = buildNoteKey(url);
  bc.postMessage({ type: 'navigation', tabId, key });
}

chrome.webNavigation.onHistoryStateUpdated.addListener((details) => {
  // details.frameId === 0  => main frame only (ignore iframes)
  if (details.frameId === 0) {
    notifyTab(details.tabId, details.url);
  }
});

chrome.webNavigation.onReferenceFragmentUpdated.addListener((details) => {
  if (details.frameId === 0) {
    notifyTab(details.tabId, details.url);
  }
});