import 'dart:developer';

import 'package:barcode_scan2/barcode_scan2.dart';
import 'package:calorimeter/food_scan/food_fact_lookup.dart';
import 'package:calorimeter/utils/app_drawer.dart';
import 'package:calorimeter/food_entry/food_entry_bloc.dart';
import 'package:calorimeter/perdate/entry_list.dart';
import 'package:calorimeter/storage/storage.dart';
import 'package:calorimeter/utils/calendar_floating_button.dart';
import 'package:calorimeter/utils/rectangular_notch_shape.dart';
import 'package:calorimeter/utils/sum_widget.dart';
import 'package:calorimeter/utils/theme_switcher_button.dart';
import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:intl/intl.dart';
import 'package:provider/provider.dart';

class PerDateWidget extends StatefulWidget {
  final DateTime date;
  const PerDateWidget({super.key, required this.date});

  @override
  State<PerDateWidget> createState() => _PerDateWidgetState();
}

class _PerDateWidgetState extends State<PerDateWidget> {
  late FoodStorage storage;
  late Future<List<FoodEntry>> entriesFuture;
  List<FoodEntry> entries = [];
  String formattedDate = '';
  FoodFactLookupClient client = FoodFactLookupClient();

  @override
  void initState() {
    formattedDate = DateFormat.yMMMMd('de').format(widget.date);
    storage = FoodStorage.getInstance();
    entriesFuture = storage.getEntriesForDate(widget.date);
    entriesFuture.then((val) {
      entries = val;
    });
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return FutureBuilder(
        future: entriesFuture,
        builder: (context, snapshot) {
          if (snapshot.connectionState != ConnectionState.done) {
            return const Center(child: CircularProgressIndicator());
          } else {
            return ChangeNotifierProvider(
              create: (context) => ScannedFood(),
              child: BlocProvider(
                create: (context) => FoodEntryBloc(
                    initialState: FoodEntryState(foodEntries: entries),
                    storage: storage,
                    forDate: widget.date),
                child: BlocBuilder<FoodEntryBloc, FoodEntryState>(
                    builder: (context, state) {
                  return Scaffold(
                      appBar: AppBar(
                        title: Text(formattedDate),
                        actions: const [ThemeSwitcherButton()],
                      ),
                      body: FoodEntryList(entries: state.foodEntries),
                      bottomNavigationBar: BottomAppBar(
                          shape: const RectangularNotchShape(),
                          color: Theme.of(context).colorScheme.secondary,
                          child: SumWidget(foodEntries: state.foodEntries)),
                      drawer: const AppDrawer(),
                      floatingActionButton: OverflowBar(children: [
                        FloatingActionButton(
                          child: const Icon(Icons.barcode_reader),
                          onPressed: () async {
                            var scanResult = await BarcodeScanner.scan();
                            var food = await client
                                .retrieveFoodInfo(scanResult.rawContent);

                            if (!context.mounted) return;

                            context
                                .read<ScannedFood>()
                                .set(food.name, food.kcalPer100g.toString());
                          },
                        ),
                        const SizedBox(width: 8),
                        CalendarFloatingButton(date: widget.date),
                      ]),
                      floatingActionButtonLocation:
                          FloatingActionButtonLocation.endDocked);
                }),
              ),
            );
          }
        });
  }
}

class ScannedFood extends ChangeNotifier {
  String name = "";
  String kcalPer100g = "";

  void set(String newName, String newKcal) {
    name = newName;
    kcalPer100g = newKcal;
    notifyListeners();
  }
}