/**
 * Content entry. Runs in the page's main world via the manifest declaration.
 * Coordinates: detector → layout → drawer mount/unmount on phase change.
 */

import { startDetector, currentPhase } from './detector';
import { ensureHost, applyHomeLayout, applyInGameLayout } from './layout';
import { mountDrawer, unmountDrawer } from './chat-drawer';
import { instrumentWS } from './util/ws-proxy';

function bootstrap(): void {
  // 1. Always inject a host element so we can mount UI.
  ensureHost();

  // 2. Lightly instrument WebSocket so we can confirm auth is alive (no payload capture).
  instrumentWS();

  // 3. React to phase changes
  document.addEventListener('bbp:phase', (e) => {
    const phase = (e as CustomEvent).detail?.phase as string;
    applyHomeLayoutIfHome(phase);
    applyInGameLayoutIfInGame(phase);
    drawerForPhase(phase);
  });

  // 4. Start detector
  startDetector();

  // 5. Initial layout based on current phase (the detector emit() handles this
  // too, but we double-call here so the first frame isn't unstyled.)
  const phase = currentPhase();
  applyHomeLayoutIfHome(phase);
  applyInGameLayoutIfInGame(phase);
  drawerForPhase(phase);
}

function applyHomeLayoutIfHome(phase: string): void {
  if (phase === 'home' || phase === 'lobby-list') applyHomeLayout();
}

function applyInGameLayoutIfInGame(phase: string): void {
  if (phase === 'in-game') applyInGameLayout();
}

function drawerForPhase(phase: string): void {
  if (phase === 'in-game') mountDrawer();
  else unmountDrawer();
}

// Wait for body so we can append to it.
if (document.body) bootstrap();
else document.addEventListener('DOMContentLoaded', bootstrap);