import 'package:flutter/material.dart';
import 'package:moonwell_launcher/app/design_system/mw_shells.dart';
import 'package:moonwell_launcher/app/home_screen/home_screen.dart';
import 'package:moonwell_launcher/app/login_screen/login_screen.dart';
import 'package:moonwell_launcher/app/theme/moonwell_design_system.dart';
import 'package:moonwell_launcher/features/launcher/application/restore_launcher_session_use_case.dart';
import 'package:moonwell_launcher/features/launcher/data/launcher_api_client.dart';
import 'package:moonwell_launcher/features/preferences/domain/repositories/preferences_repository.dart';
import 'package:moonwell_launcher/service_container.dart';

class MoonWellApp extends StatefulWidget {
  const MoonWellApp({super.key});

  @override
  State<MoonWellApp> createState() => _MoonWellAppState();
}

class _MoonWellAppState extends State<MoonWellApp> {
  late final LauncherThemeController _themeController;

  @override
  void initState() {
    super.initState();
    _themeController = LauncherThemeController(getIt<PreferencesRepository>());
    _themeController.load();
  }

  @override
  void dispose() {
    _themeController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return AnimatedBuilder(
      animation: _themeController,
      builder: (context, _) => LauncherThemeScope(
        controller: _themeController,
        child: MaterialApp(
          title: 'MoonWell',
          debugShowCheckedModeBanner: false,
          home: const _LauncherBootstrapScreen(),
          theme: MoonWellTheme.create(_themeController.variant),
        ),
      ),
    );
  }
}

class LauncherThemeScope extends InheritedNotifier<LauncherThemeController> {
  const LauncherThemeScope({
    super.key,
    required LauncherThemeController controller,
    required super.child,
  }) : super(notifier: controller);

  static LauncherThemeController of(BuildContext context) {
    final scope = context
        .dependOnInheritedWidgetOfExactType<LauncherThemeScope>();
    assert(scope != null, 'LauncherThemeScope is missing');
    return scope!.notifier!;
  }
}

class _LauncherBootstrapScreen extends StatefulWidget {
  const _LauncherBootstrapScreen();

  @override
  State<_LauncherBootstrapScreen> createState() =>
      _LauncherBootstrapScreenState();
}

class _LauncherBootstrapScreenState extends State<_LauncherBootstrapScreen> {
  late final Future<RestoreLauncherSessionResult> _bootstrapFuture;

  @override
  void initState() {
    super.initState();
    _bootstrapFuture = RestoreLauncherSessionUseCase(
      launcherApiClient: getIt<LauncherApiClient>(),
      preferencesRepository: getIt<PreferencesRepository>(),
    )();
  }

  @override
  Widget build(BuildContext context) {
    return FutureBuilder<RestoreLauncherSessionResult>(
      future: _bootstrapFuture,
      builder: (context, snapshot) {
        if (snapshot.connectionState != ConnectionState.done) {
          return const _LauncherBootstrapLoadingScreen();
        }
        final result =
            snapshot.data ??
            const RestoreLauncherSessionResult.unauthenticated();
        if (result.isAuthenticated) {
          return HomeScreen(
            session: result.session!,
            manifest: result.manifest!,
          );
        }
        return const LoginScreen();
      },
    );
  }
}

class _LauncherBootstrapLoadingScreen extends StatelessWidget {
  const _LauncherBootstrapLoadingScreen();

  @override
  Widget build(BuildContext context) {
    return const Scaffold(
      body: MwArtworkBackground(
        child: Center(
          child: Column(
            mainAxisSize: MainAxisSize.min,
            children: [
              MwBrandMark(width: 220),
              SizedBox(height: 24),
              SizedBox.square(
                dimension: 28,
                child: CircularProgressIndicator(strokeWidth: 2),
              ),
            ],
          ),
        ),
      ),
    );
  }
}