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

import 'core/feature_flags.dart';
import 'l10n/gen/app_localizations.dart';
import 'state/providers.dart';
import 'ui/screens/splash_screen.dart';

class BlockSeasonsApp extends ConsumerStatefulWidget {
  const BlockSeasonsApp({super.key});

  @override
  ConsumerState<BlockSeasonsApp> createState() => _BlockSeasonsAppState();
}

class _BlockSeasonsAppState extends ConsumerState<BlockSeasonsApp>
    with WidgetsBindingObserver {
  @override
  void initState() {
    super.initState();
    WidgetsBinding.instance.addObserver(this);
    WidgetsBinding.instance.addPostFrameCallback((_) {
      ref.read(consentServiceProvider).ensureConsentAndInitialize();
      // Eagerly start the IAP service so its purchase stream is live for the
      // whole session — restores and interrupted/deferred transactions are
      // delivered (and completed) even if the player never opens Settings.
      if (kIapEnabled) ref.read(iapServiceProvider);
      // Start background music for the current context (menu by default).
      ref.read(musicServiceProvider).playKey(ref.read(activeThemeProvider).bgm);
    });
  }

  @override
  void dispose() {
    WidgetsBinding.instance.removeObserver(this);
    super.dispose();
  }

  @override
  void didChangeAppLifecycleState(AppLifecycleState state) {
    // Pause music while the app is not in the foreground.
    ref
        .read(musicServiceProvider)
        .setBackgrounded(state != AppLifecycleState.resumed);
  }

  @override
  Widget build(BuildContext context) {
    // Switch the looping track whenever the active season theme changes
    // (home/menu -> a season -> back). playKey is a no-op if unchanged.
    ref.listen(activeThemeProvider, (_, next) {
      ref.read(musicServiceProvider).playKey(next.bgm);
    });
    return MaterialApp(
      onGenerateTitle: (context) => AppLocalizations.of(context)!.appTitle,
      debugShowCheckedModeBanner: false,
      localizationsDelegates: const [
        AppLocalizations.delegate,
        GlobalMaterialLocalizations.delegate,
        GlobalWidgetsLocalizations.delegate,
        GlobalCupertinoLocalizations.delegate,
      ],
      supportedLocales: const [Locale('en'), Locale('ko')],
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(
          seedColor: const Color(0xFF5B7FFF),
          brightness: Brightness.dark,
        ),
        useMaterial3: true,
      ),
      home: const SplashScreen(),
    );
  }
}