// Version: 1.3.0 | Created: 2026-04-01 | Updated: 2026-09-25
// Application entry point.
// v1.3.0: wires SessionJourney (session/journey/friction tracking, ported
// from the WordPress sites per plan ancient-petting-hejlsberg.md §3/§5).
// WidgetsFlutterBinding.ensureInitialized() stays the literal first line —
// calling SessionJourney.init() before it crashes the release web build
// with a null-check error (found and fixed on GardenBuddy the same day,
// 2026-09-25 — not repeating that mistake here).

import 'dart:async';

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:olm/olm.dart' as olm;

import 'app/app.dart';
import 'core/analytics/session_journey.dart';
import 'core/push/web_push_service.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();

  // Check Olm availability — this prints to the browser console.
  try {
    await olm.init();
    debugPrint(
      '[M8Chat] Olm initialized successfully: ${olm.get_library_version()}',
    );
  } catch (e) {
    debugPrint('[M8Chat] Olm NOT available: $e');
  }

  // Register the push service worker at startup so the browser knows about it.
  // The actual push subscription happens after login (in auth_notifier.dart).
  if (kIsWeb) {
    unawaited(registerPushServiceWorker());
  }

  // Catch Flutter framework errors (widget build, rendering) without crashing.
  FlutterError.onError = (details) {
    debugPrint('[M8Chat] Flutter error: ${details.exceptionAsString()}');
  };

  // Catch all unhandled async errors — including those thrown by the Matrix SDK
  // in runInRoot() after login (encryption init, sync startup). Without this
  // handler the browser runtime crashes and the UI freezes on the spinner.
  PlatformDispatcher.instance.onError = (error, stack) {
    debugPrint('[M8Chat] Uncaught error: $error');
    return true; // returning true marks the error as handled
  };

  // SessionJourney.init() runs AFTER the two handlers above so it CHAINS to
  // them (captures them as "previous", calls them after its own reporting)
  // rather than replacing them. See session_journey.dart's header.
  SessionJourney.init(appVersion: '1.12.0');

  runApp(const ProviderScope(child: M8ChatApp()));
}