import 'package:calodiary/theme_bloc.dart';
import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:intl/intl.dart';
import 'package:calodiary/app_drawer.dart';
import 'package:calodiary/calendar_floating_button.dart';
import 'package:calodiary/enter_food_widget.dart';
import 'package:calodiary/food_entry_bloc.dart';
import 'package:calodiary/food_entry_widget.dart';
import 'package:calodiary/storage/storage.dart';
import 'package:calodiary/sum_widget.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 AppStorage storage;
  late Future<List<FoodEntry>> entriesFuture;
  late List<FoodEntry> entries;

  @override
  void initState() {
    super.initState();

    storage = AppStorage.getInstance();
    entriesFuture = storage.getEntriesForDate(widget.date);
    entriesFuture.then((val) {
      entries = val;
    });
  }

  @override
  Widget build(BuildContext context) {
    var formattedDate = DateFormat.yMMMMd('de').format(widget.date);
    return Scaffold(
        appBar: AppBar(
          title: Text(formattedDate),
          actions: [
            BlocBuilder<ThemeDataBloc, ThemeState>(builder: (context, state) {
              var icon = const Icon(Icons.light_mode);
              if (state.brightness == 'light') {
                icon = const Icon(Icons.dark_mode);
              }
              return IconButton(
                icon: icon,
                onPressed: () {
                  context.read<ThemeDataBloc>().add(ThemeToggleEvent());
                },
              );
            }),
          ],
        ),
        drawer: const AppDrawer(),
        body: FutureBuilder(
          future: entriesFuture,
          builder: (context, snapshot) {
            if (snapshot.connectionState != ConnectionState.done) {
              return const Center(child: CircularProgressIndicator());
            } else {
              return BlocProvider(
                create: (context) => FoodEntryBloc(
                    initialState: FoodEntryState(foodEntries: entries),
                    storage: storage,
                    forDate: widget.date),
                child: BlocBuilder<FoodEntryBloc, FoodEntryState>(
                    builder: (context, state) {
                  return ListView.builder(
                    itemCount: state.foodEntries.length + 2,
                    itemBuilder: (BuildContext itemBuilderContext, int index) {
                      if (index == state.foodEntries.length) {
                        return Padding(
                          padding: const EdgeInsets.symmetric(vertical: 10),
                          child: SumWidget(foodEntries: state.foodEntries),
                        );
                      }
                      if (index == state.foodEntries.length + 1) {
                        return Column(
                          children: [
                            EnterFoodWidget(
                              onAdd: (context, entry) {
                                context
                                    .read<FoodEntryBloc>()
                                    .add(FoodEntryEvent(entry: entry));
                              },
                            ),
                            const SizedBox(height: 75),
                          ],
                        );
                      }

                      return FoodEntryWidget(
                        entry: state.foodEntries[index],
                        onDelete: (callbackContext) {
                          callbackContext
                              .read<FoodEntryBloc>()
                              .add(FoodDeletionEvent(
                                entryID: state.foodEntries[index].id,
                              ));
                        },
                      );
                    },
                  );
                }),
              );
            }
          },
        ),
        floatingActionButton: CalendarFloatingButton(date: widget.date));
  }
}