import "dart:io";
import "package:dynamic_color/dynamic_color.dart";
import "package:fast_immutable_collections/fast_immutable_collections.dart";
import "package:flutter/foundation.dart";
import "package:flutter_riverpod/flutter_riverpod.dart";
import "package:media_kit/media_kit.dart";
import "package:nexus/controllers/client.dart";
import "package:nexus/controllers/client_state.dart";
import "package:nexus/controllers/multi_provider.dart";
import "package:nexus/controllers/settings.dart";
import "package:nexus/controllers/shared_prefs.dart";
import "package:nexus/helpers/extensions/better_when.dart";
import "package:nexus/helpers/extensions/scheme_to_theme.dart";
import "package:nexus/helpers/font_licenses.dart";
import "package:nexus/pages/chat.dart";
import "package:nexus/pages/select_server.dart";
import "package:nexus/pages/verify.dart";
import "package:nexus/widgets/error_dialog.dart";
import "package:nexus/widgets/loading.dart";
import "package:window_manager/window_manager.dart";
import "package:flutter/material.dart";

final GlobalKey<NavigatorState> navigatorKey = GlobalKey<NavigatorState>();

final class Logger extends ProviderObserver {
  @override
  void didUpdateProvider(
    ProviderObserverContext context,
    Object? previousValue,
    Object? newValue,
  ) => debugPrint("""
Time: ${DateTime.now().toIso8601String()}
Provider: ${context.provider}
Previous Value: ${previousValue is AsyncData ? previousValue.value : previousValue}
New Value: ${newValue is AsyncData ? newValue.value : newValue}
""");
}

void showError(Object error, [StackTrace? stackTrace]) {
  if (error.toString().contains("DioException") ||
      error.toString().contains(
        "setState() or markNeedsBuild() called during build.",
      ) ||
      error.toString().contains("Invalid source") ||
      error.toString().contains("UTF-16") ||
      error.toString().contains("HTTP request failed") ||
      error.toString().contains("Invalid image data")) {
    return;
  }

  debugPrintStack(stackTrace: stackTrace, label: error.toString());
  if (navigatorKey.currentContext != null) {
    Future.delayed(
      Duration.zero,
      () => showDialog(
        context: navigatorKey.currentContext!,
        builder: (_) => ErrorDialog(error, stackTrace),
        barrierDismissible: false,
      ),
    );
  }
}

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

  if (Platform.isLinux || Platform.isMacOS || Platform.isWindows) {
    await windowManager.ensureInitialized();
    await windowManager.waitUntilReadyToShow(
      WindowOptions(
        titleBarStyle: TitleBarStyle.hidden,
        windowButtonVisibility: false,
      ),
    );
    await windowManager.setMinimumSize(Size.square(500));
  }

  LicenseRegistry.addLicense(() => Stream.fromIterable(fontLicenses));

  FlutterError.onError = (FlutterErrorDetails details) =>
      showError(details.exception.toString(), details.stack);

  runApp(
    ProviderScope(
      retry: (_, _) => null,
      observers: [
        // Change false to true if you want debug information on provider reloads
        // ignore: dead_code
        if (false && kDebugMode) Logger(),
      ],
      child: const App(),
    ),
  );
}

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

  @override
  Widget build(BuildContext context) => DynamicColorBuilder(
    builder: (lightDynamic, darkDynamic) => Consumer(
      builder: (context, ref, child) => MaterialApp(
        navigatorKey: navigatorKey,
        debugShowCheckedModeBanner: false,
        // Use indigo to work around bugs in theme generation
        theme:
            (ref
                        .watch(SettingsController.provider)
                        .maybeWhen(
                          orElse: () => lightDynamic,
                          data: (settings) =>
                              settings.useDynamicTheming ? lightDynamic : null,
                        ) ??
                    ColorScheme.fromSeed(seedColor: Colors.indigo))
                .theme,
        darkTheme:
            (ref
                        .watch(SettingsController.provider)
                        .maybeWhen(
                          orElse: () => darkDynamic,
                          data: (settings) =>
                              settings.useDynamicTheming ? darkDynamic : null,
                        ) ??
                    ColorScheme.fromSeed(
                      seedColor: Colors.indigo,
                      brightness: Brightness.dark,
                    ))
                .theme,
        themeMode: ref
            .watch(SettingsController.provider)
            .maybeWhen(
              data: (settings) => settings.theme,
              orElse: () => ThemeMode.system,
            ),
        home: child,
      ),
      child: Scaffold(
        body: Consumer(
          builder: (_, ref, _) => ref
              .watch(
                MultiProviderController.provider(
                  IListConst([
                    SharedPrefsController.provider,
                    ClientController.provider,
                  ]),
                ),
              )
              .betterWhen(
                data: (_) => Consumer(
                  builder: (_, ref, _) {
                    final clientState = ref.watch(
                      ClientStateController.provider,
                    );

                    if (clientState == null || !clientState.isInitialized) {
                      return Loading();
                    }

                    if (!clientState.isLoggedIn) {
                      return SelectServerPage();
                    } else if (!clientState.isVerified) {
                      return VerifyPage();
                    } else {
                      return ChatPage();
                    }
                  },
                ),
              ),
        ),
      ),
    ),
  );
}