calorimeter/lib/enter_food_widget.dart

import 'package:calodiary/storage/storage.dart';
import 'package:flutter/material.dart';
import 'package:calodiary/food_entry_bloc.dart';
import 'package:calodiary/row_with_spacers_widget.dart';

class EnterFoodWidget extends StatefulWidget {
  final Function(BuildContext context, FoodEntry entry) onAdd;

  const EnterFoodWidget({super.key, required this.onAdd});

  @override
  State<EnterFoodWidget> createState() => _EnterFoodWidgetState();
}

class _EnterFoodWidgetState extends State<EnterFoodWidget> {
  String perFoodresult = "dings";
  TextEditingController nameController = TextEditingController();
  TextEditingController massController = TextEditingController();
  TextEditingController kcalPerMassController = TextEditingController();
  Map<String, double> suggestions = {};

  @override
  void initState() {
    suggestions = FoodStorage.getInstance().getFoodEntryLookupDatabase;
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    var nameWidget = Autocomplete<String>(
        optionsViewOpenDirection: OptionsViewOpenDirection.down,
        fieldViewBuilder: (context, controller, focusNode, onSubmitted) {
          nameController = controller;
          return TextFormField(
            controller: controller,
            focusNode: focusNode,
            decoration: const InputDecoration(
              label: Text("Name"),
            ),
          );
        },
        optionsBuilder: (TextEditingValue textEditingValue) {
          if (textEditingValue.text == '') {
            return const Iterable<String>.empty();
          }

          return suggestions.keys.where(
            (name) {
              return name
                  .toLowerCase()
                  .contains(textEditingValue.text.toLowerCase());
            },
          );
        },
        onSelected: (selectedFood) {
          double kcalPerMassForSelectedFood = suggestions[selectedFood]!;
          setState(() {
            kcalPerMassController.text = kcalPerMassForSelectedFood.toString();
          });
        });

    var massWidget = TextField(
      textAlign: TextAlign.end,
      decoration: const InputDecoration(
        label: Align(alignment: Alignment.centerRight, child: Text("Menge")),
      ),
      keyboardType: TextInputType.number,
      controller: massController,
      onSubmitted: (value) => onSubmitAction(),
    );

    var kcalPerMassWidget = TextField(
      textAlign: TextAlign.end,
      decoration: const InputDecoration(
          label:
              Align(alignment: Alignment.centerRight, child: Text("kcal pro"))),
      keyboardType: TextInputType.number,
      controller: kcalPerMassController,
      onSubmitted: (value) => onSubmitAction(),
    );

    var enterButton = ElevatedButton(
        style: ElevatedButton.styleFrom(
          padding: EdgeInsets.zero,
        ),
        onPressed: () => onSubmitAction(),
        child: const Icon(Icons.add));

    return Padding(
      padding: const EdgeInsets.only(left: 8.0, right: 4.0),
      child: RowWidget(
        nameWidget,
        massWidget,
        kcalPerMassWidget,
        Padding(
          padding: const EdgeInsets.only(left: 16.0),
          child: enterButton,
        ),
      ),
    );
  }

  void onSubmitAction() {
    double massAsNumber = 0.0;
    double kcalPerMassAsNumber = 0.0;

    try {
      massAsNumber = double.parse(massController.text.replaceAll(",", "."));
    } catch (e) {
      var snackbar = const SnackBar(content: Text("Menge muss eine Zahl sein"));
      ScaffoldMessenger.of(context).clearSnackBars();
      ScaffoldMessenger.of(context).showSnackBar(snackbar);
      return;
    }

    try {
      kcalPerMassAsNumber =
          double.parse(kcalPerMassController.text.replaceAll(",", "."));
    } catch (e) {
      var snackbar =
          const SnackBar(content: Text("'kcal pro 100g' muss eine Zahl sein"));
      ScaffoldMessenger.of(context).clearSnackBars();
      ScaffoldMessenger.of(context).showSnackBar(snackbar);
      return;
    }
    try {
      massAsNumber = double.parse(massController.text.replaceAll(",", "."));
    } catch (e) {
      var snackbar = const SnackBar(content: Text("Menge muss eine Zahl sein"));
      ScaffoldMessenger.of(context).clearSnackBars();
      ScaffoldMessenger.of(context).showSnackBar(snackbar);
      return;
    }

    var entry = FoodEntry(
        name: nameController.text,
        mass: massAsNumber,
        kcalPerMass: kcalPerMassAsNumber);

    widget.onAdd(context, entry);
  }
}