/* SPDX-License-Identifier: GPL-3.0-or-later */
/* Copyright (C) 2024 Marco Groß <mgross@sw-gross.de> */

import 'package:calorimeter/food_entry/food_entry_bloc.dart';
import 'package:calorimeter/perdate/perdate_pageview_controller.dart';
import 'package:calorimeter/storage/storage.dart';
import 'package:calorimeter/utils/date_time_helper.dart';
import 'package:calorimeter/utils/settings_bloc.dart';
import 'package:calorimeter/utils/theme_bloc.dart';
import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:flutter_gen/gen_l10n/app_localizations.dart';

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

  var foodStorage = await FoodStorage.create();
  await foodStorage.buildFoodLookupDatabase();

  runApp(
    MainApp(storage: foodStorage),
  );
}

class MainApp extends StatefulWidget {
  final FoodStorage storage;

  const MainApp({super.key, required this.storage});

  @override
  State<MainApp> createState() => _MainAppState();
}

class _MainAppState extends State<MainApp> {
  late DateTime timeNow;
  late List<FoodEntryState> entriesForToday;

  late double kcalLimit;
  late String brightness;

  late Future<bool>? initFuture;

  Future<bool> asyncInit() async {
    timeNow = DateTimeHelper.now();
    entriesForToday = await widget.storage.getEntriesForDate(timeNow);

    kcalLimit = await widget.storage.readLimit();
    brightness = await widget.storage.readBrightness();

    return true;
  }

  @override
  void initState() {
    super.initState();
    initFuture = asyncInit();
  }

  @override
  Widget build(BuildContext context) {
    return SafeArea(
      child: FutureBuilder<Object>(
          future: initFuture,
          builder: (context, snapshot) {
            if (snapshot.connectionState != ConnectionState.done) {
              return Center(child: CircularProgressIndicator());
            }

            return MultiBlocProvider(
              providers: [
                BlocProvider(
                  create: (context) => FoodEntryBloc(
                    storage: widget.storage,
                    initialState: GlobalEntryState(
                        foodEntries: {timeNow: entriesForToday}),
                  ),
                ),
                BlocProvider(
                  create: (context) => SettingsDataBloc(
                      SettingsState(kcalLimit: kcalLimit),
                      storage: widget.storage),
                ),
                BlocProvider(
                  create: (context) => ThemeDataBloc(
                      ThemeState(brightness: brightness),
                      storage: widget.storage),
                ),
              ],
              child: BlocBuilder<ThemeDataBloc, ThemeState>(
                builder: (context, state) {
                  var newBrightness = Brightness.light;
                  if (state.brightness == 'dark') {
                    newBrightness = Brightness.dark;
                  }

                  return MaterialApp(
                    home: PerDatePageViewController(
                        initialDate: DateTimeHelper.now()),
                    localizationsDelegates:
                        AppLocalizations.localizationsDelegates,
                    supportedLocales: [
                      Locale('en'),
                      ...AppLocalizations.supportedLocales,
                    ],
                    theme: ThemeData(
                      dividerTheme: const DividerThemeData(space: 2),
                      colorScheme: ColorScheme.fromSeed(
                        seedColor: Colors.lightBlue,
                        brightness: newBrightness,
                      ),
                    ),
                  );
                },
              ),
            );
          }),
    );
  }
}