calorimeter/lib/utils/sum_widget.dart

import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:calorimeter/food_entry/food_entry_bloc.dart';
import 'package:calorimeter/utils/settings_bloc.dart';

class SumWidget extends StatelessWidget {
  final List<FoodEntryState> foodEntries;
  const SumWidget({required this.foodEntries, super.key});

  @override
  Widget build(BuildContext context) {
    return BlocBuilder<SettingsDataBloc, SettingsState>(
      builder: (context, state) {
        var sum = 0.0;
        for (var entry in foodEntries) {
          sum += entry.kcalPer100 / 100 * entry.mass;
        }
        var diff = state.kcalLimit - sum;
        var diffLimit = state.kcalLimit ~/ 4;

        var textColor = Theme.of(context).colorScheme.onSecondary;
        var newTextColor = textColor;
        var brightness = Theme.of(context).brightness;

        switch (brightness) {
          case Brightness.dark:
            if (diff < 0) {
              newTextColor = Colors.red[900]!;
            } else if (diff < diffLimit) {
              newTextColor = Colors.orange[900]!;
            }
            break;

          case Brightness.light:
            if (diff < 0) {
              newTextColor = Colors.redAccent;
            } else if (diff < diffLimit) {
              newTextColor = Colors.orangeAccent;
            }
            break;
        }

        return Align(
          alignment: Alignment.centerLeft,
          child: Text(
            'kcal heute: ${sum.ceil().toString()}/${state.kcalLimit.ceil()}',
            style: Theme.of(context)
                .textTheme
                .bodyLarge!
                .copyWith(color: newTextColor),
          ),
        );
      },
    );
  }
}