/*
 * This file is part of wger Workout Manager <https://github.com/wger-project>.
 * Copyright (C) 2020, 2021 wger Team
 *
 * wger Workout Manager is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * wger Workout Manager is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart' as riverpod;
import 'package:logging/logging.dart';
import 'package:provider/provider.dart';
import 'package:wger/core/exceptions/http_exception.dart';
import 'package:wger/core/locator.dart';
import 'package:wger/helpers/errors.dart';
import 'package:wger/helpers/shared_preferences.dart';
import 'package:wger/l10n/generated/app_localizations.dart';
import 'package:wger/providers/add_exercise.dart';
import 'package:wger/providers/base_provider.dart';
import 'package:wger/providers/body_weight.dart';
import 'package:wger/providers/exercises.dart';
import 'package:wger/providers/gallery.dart';
import 'package:wger/providers/measurement.dart';
import 'package:wger/providers/nutrition.dart';
import 'package:wger/providers/routines.dart';
import 'package:wger/providers/user.dart';
import 'package:wger/screens/add_exercise_screen.dart';
import 'package:wger/screens/auth_screen.dart';
import 'package:wger/screens/configure_plates_screen.dart';
import 'package:wger/screens/dashboard.dart';
import 'package:wger/screens/exercise_screen.dart';
import 'package:wger/screens/exercises_screen.dart';
import 'package:wger/screens/form_screen.dart';
import 'package:wger/screens/gallery_screen.dart';
import 'package:wger/screens/gym_mode.dart';
import 'package:wger/screens/home_tabs_screen.dart';
import 'package:wger/screens/log_meal_screen.dart';
import 'package:wger/screens/log_meals_screen.dart';
import 'package:wger/screens/measurement_categories_screen.dart';
import 'package:wger/screens/measurement_entries_screen.dart';
import 'package:wger/screens/nutritional_diary_screen.dart';
import 'package:wger/screens/nutritional_plan_screen.dart';
import 'package:wger/screens/nutritional_plans_screen.dart';
import 'package:wger/screens/routine_edit_screen.dart';
import 'package:wger/screens/routine_list_screen.dart';
import 'package:wger/screens/routine_logs_screen.dart';
import 'package:wger/screens/routine_screen.dart';
import 'package:wger/screens/splash_screen.dart';
import 'package:wger/screens/update_app_screen.dart';
import 'package:wger/screens/weight_screen.dart';
import 'package:wger/theme/theme.dart';
import 'package:wger/widgets/core/about.dart';
import 'package:wger/widgets/core/log_overview.dart';
import 'package:wger/widgets/core/settings.dart';

import 'helpers/logs.dart';
import 'providers/auth.dart';

void _setupLogging() {
  Logger.root.level = kDebugMode ? Level.ALL : Level.INFO;
  Logger.root.onRecord.listen((record) {
    print('${record.level.name}: ${record.time} [${record.loggerName}] ${record.message}');
    InMemoryLogStore().add(record);
  });
}

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

void main() async {
  // Needs to be called before runApp
  WidgetsFlutterBinding.ensureInitialized();

  // Logger
  _setupLogging();

  final logger = Logger('main');

  // Locator to initialize exerciseDB
  await ServiceLocator().configure();

  // SharedPreferences to SharedPreferencesAsync migration function
  await PreferenceHelper.instance.migrationSupportFunctionForSharedPreferences();

  // Catch errors from Flutter itself (widget build, layout, paint, etc.)
  //
  // NOTE: it seems this sometimes makes problems and even freezes the flutter
  //       process when widgets overflow, so it is disabled in dev mode.
  if (!kDebugMode) {
    FlutterError.onError = (FlutterErrorDetails details) {
      final stack = details.stack ?? StackTrace.empty;
      logger.severe('Error caught by FlutterError.onError: ${details.exception}');

      FlutterError.dumpErrorToConsole(details);

      // Don't show the full error dialog for network image loading errors.
      if (details.exception is NetworkImageLoadException) {
        return;
      }

      showGeneralErrorDialog(details.exception, stack);
      // throw details.exception;
    };
  }

  // Catch errors that happen outside of the Flutter framework (e.g., in async operations)
  PlatformDispatcher.instance.onError = (error, stack) {
    logger.severe('Error caught by PlatformDispatcher.instance.onError: $error');
    logger.severe('Stack trace: $stack');

    if (error is WgerHttpException) {
      showHttpExceptionErrorDialog(error);
    } else {
      showGeneralErrorDialog(error, stack);
    }

    // Return true to indicate that the error has been handled.
    return true;
  };

  // Application
  runApp(const riverpod.ProviderScope(child: MainApp()));
}

class MainApp extends StatelessWidget {
  const MainApp();

  Widget _getHomeScreen(AuthProvider auth) {
    switch (auth.state) {
      case AuthState.loggedIn:
        return HomeTabsScreen();
      case AuthState.updateRequired:
        return const UpdateAppScreen();
      default:
        return FutureBuilder(
          future: auth.tryAutoLogin(),
          builder: (ctx, authResultSnapshot) =>
              authResultSnapshot.connectionState == ConnectionState.waiting
              ? const SplashScreen()
              : const AuthScreen(),
        );
    }
  }

  @override
  Widget build(BuildContext context) {
    return MultiProvider(
      providers: [
        ChangeNotifierProvider(create: (ctx) => AuthProvider()),
        ChangeNotifierProxyProvider<AuthProvider, ExercisesProvider>(
          create: (context) => ExercisesProvider(
            WgerBaseProvider(Provider.of(context, listen: false)),
          ),
          update: (context, base, previous) =>
              previous ?? ExercisesProvider(WgerBaseProvider(base)),
        ),
        ChangeNotifierProxyProvider2<AuthProvider, ExercisesProvider, RoutinesProvider>(
          create: (context) => RoutinesProvider(
            WgerBaseProvider(Provider.of(context, listen: false)),
            Provider.of(context, listen: false),
            [],
          ),
          update: (context, auth, exercises, previous) =>
              previous ?? RoutinesProvider(WgerBaseProvider(auth), exercises, []),
        ),
        ChangeNotifierProxyProvider<AuthProvider, NutritionPlansProvider>(
          create: (context) => NutritionPlansProvider(
            WgerBaseProvider(Provider.of(context, listen: false)),
            [],
          ),
          update: (context, auth, previous) =>
              previous ?? NutritionPlansProvider(WgerBaseProvider(auth), []),
        ),
        ChangeNotifierProxyProvider<AuthProvider, MeasurementProvider>(
          create: (context) => MeasurementProvider(
            WgerBaseProvider(Provider.of(context, listen: false)),
          ),
          update: (context, base, previous) =>
              previous ?? MeasurementProvider(WgerBaseProvider(base)),
        ),
        ChangeNotifierProxyProvider<AuthProvider, UserProvider>(
          create: (context) => UserProvider(
            WgerBaseProvider(Provider.of(context, listen: false)),
          ),
          update: (context, base, previous) => previous ?? UserProvider(WgerBaseProvider(base)),
        ),
        ChangeNotifierProxyProvider<AuthProvider, BodyWeightProvider>(
          create: (context) => BodyWeightProvider(
            WgerBaseProvider(Provider.of(context, listen: false)),
          ),
          update: (context, base, previous) =>
              previous ?? BodyWeightProvider(WgerBaseProvider(base)),
        ),
        ChangeNotifierProxyProvider<AuthProvider, GalleryProvider>(
          create: (context) => GalleryProvider(
            Provider.of(context, listen: false),
            [],
          ),
          update: (context, auth, previous) => previous ?? GalleryProvider(auth, []),
        ),
        ChangeNotifierProxyProvider<AuthProvider, AddExerciseProvider>(
          create: (context) => AddExerciseProvider(
            WgerBaseProvider(Provider.of(context, listen: false)),
          ),
          update: (context, base, previous) =>
              previous ?? AddExerciseProvider(WgerBaseProvider(base)),
        ),
      ],
      child: Consumer<AuthProvider>(
        builder: (ctx, auth, _) => Consumer<UserProvider>(
          builder: (ctx, user, _) => MaterialApp(
            title: 'wger',
            navigatorKey: navigatorKey,
            theme: wgerLightTheme,
            darkTheme: wgerDarkTheme,
            highContrastTheme: wgerLightThemeHc,
            highContrastDarkTheme: wgerDarkThemeHc,
            themeMode: user.themeMode,
            home: _getHomeScreen(auth),
            routes: {
              DashboardScreen.routeName: (ctx) => const DashboardScreen(),
              FormScreen.routeName: (ctx) => const FormScreen(),
              GalleryScreen.routeName: (ctx) => const GalleryScreen(),
              GymModeScreen.routeName: (ctx) => const GymModeScreen(),
              HomeTabsScreen.routeName: (ctx) => HomeTabsScreen(),
              MeasurementCategoriesScreen.routeName: (ctx) => const MeasurementCategoriesScreen(),
              MeasurementEntriesScreen.routeName: (ctx) => const MeasurementEntriesScreen(),
              NutritionalPlansScreen.routeName: (ctx) => const NutritionalPlansScreen(),
              NutritionalDiaryScreen.routeName: (ctx) => const NutritionalDiaryScreen(),
              NutritionalPlanScreen.routeName: (ctx) => const NutritionalPlanScreen(),
              LogMealsScreen.routeName: (ctx) => const LogMealsScreen(),
              LogMealScreen.routeName: (ctx) => const LogMealScreen(),
              WeightScreen.routeName: (ctx) => const WeightScreen(),
              RoutineScreen.routeName: (ctx) => const RoutineScreen(),
              RoutineEditScreen.routeName: (ctx) => const RoutineEditScreen(),
              WorkoutLogsScreen.routeName: (ctx) => const WorkoutLogsScreen(),
              RoutineListScreen.routeName: (ctx) => const RoutineListScreen(),
              ExercisesScreen.routeName: (ctx) => const ExercisesScreen(),
              ExerciseDetailScreen.routeName: (ctx) => const ExerciseDetailScreen(),
              AddExerciseScreen.routeName: (ctx) => const AddExerciseScreen(),
              AboutPage.routeName: (ctx) => const AboutPage(),
              SettingsPage.routeName: (ctx) => const SettingsPage(),
              LogOverviewPage.routeName: (ctx) => const LogOverviewPage(),
              ConfigurePlatesScreen.routeName: (ctx) => const ConfigurePlatesScreen(),
            },
            localizationsDelegates: AppLocalizations.localizationsDelegates,
            supportedLocales: AppLocalizations.supportedLocales,
          ),
        ),
      ),
    );
  }
}