import 'package:flutter/material.dart';
import 'package:flutter_localizations/flutter_localizations.dart';

import 'data/hub_endpoint.dart';
import 'data/hub_repository.dart';
import 'data/repository.dart';
import 'pages/landing_page.dart';
import 'theme/lawheatmap_theme.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  final settings = await HubSettings.load();
  final repository = await _pickRepository(settings);
  runApp(LawHeatmapApp(repository: repository, settings: settings));
}

/// Decide which repository to start with.
///
///   useHub=false           → Mock, no probe (fast offline start)
///   useHub=true, healthy   → HubRepository
///   useHub=true, NOT ok    → MockRepository (graceful fallback;
///                            UI banner shows hub-down so the
///                            user can re-try from settings)
Future<EvaluationRepository> _pickRepository(HubSettings settings) async {
  if (!settings.useHub) return const MockRepository();
  final hub = await HubRepository.connect(settings);
  if (hub.isHealthy) return hub;
  return const MockRepository();
}

class LawHeatmapApp extends StatelessWidget {
  const LawHeatmapApp({
    super.key,
    this.repository = const MockRepository(),
    this.settings,
  });

  final EvaluationRepository repository;
  final HubSettings? settings;

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'F∆I Law-Heatmap',
      debugShowCheckedModeBanner: false,
      theme: LawHeatmapTheme.light(),
      darkTheme: LawHeatmapTheme.dark(),
      themeMode: ThemeMode.dark,
      localizationsDelegates: const [
        GlobalMaterialLocalizations.delegate,
        GlobalWidgetsLocalizations.delegate,
        GlobalCupertinoLocalizations.delegate,
      ],
      supportedLocales: const [Locale('de'), Locale('en')],
      home: LandingPage(repository: repository),
    );
  }
}