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(
      decoration: const InputDecoration(label: Text("Menge")),
      keyboardType: TextInputType.number,
      controller: massController,
    );

    var kcalPerMassWidget = TextField(
        decoration: const InputDecoration(label: Text("kcal pro")),
        keyboardType: TextInputType.number,
        controller: kcalPerMassController);

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

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