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

import 'core/config/env.dart';
import 'core/region/region_repository.dart';
import 'l10n/app_localizations.dart';

void main() {
  runApp(const ProviderScope(child: NuvolariApp()));
}

class NuvolariApp extends StatelessWidget {
  const NuvolariApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      onGenerateTitle: (context) => AppLocalizations.of(context).appTitle,
      localizationsDelegates: AppLocalizations.localizationsDelegates,
      supportedLocales: AppLocalizations.supportedLocales,
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: const Color(0xFF1F6FB2)),
      ),
      home: const HomeScreen(),
    );
  }
}

/// Placeholder shell for milestone 1.
///
/// It exists to prove the pieces are wired: localisation resolves, the region
/// config parses out of the asset bundle, and demo mode is visible. The radar
/// map replaces it in milestone 2.
class HomeScreen extends ConsumerWidget {
  const HomeScreen({super.key});

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final l10n = AppLocalizations.of(context);
    final region = ref.watch(regionConfigProvider);

    return Scaffold(
      appBar: AppBar(title: Text(l10n.appTitle)),
      body: Column(
        children: [
          if (Env.isDemoMode)
            MaterialBanner(
              content: Text(l10n.demoModeBanner),
              actions: const [SizedBox.shrink()],
            ),
          Expanded(
            child: Center(
              child: switch (region) {
                AsyncData(:final value) => Text(
                  value.displayName,
                  style: Theme.of(context).textTheme.headlineMedium,
                ),
                AsyncError(:final error) => Padding(
                  padding: const EdgeInsets.all(24),
                  child: Text('${l10n.dataUnavailable}\n$error'),
                ),
                _ => Text(l10n.loading),
              },
            ),
          ),
        ],
      ),
    );
  }
}