import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

import '../constants/cooking_units.dart';
import '../models/ingredient.dart';
import '../models/ingredient_list_entry.dart';
import '../models/unit.dart';
import '../src/enums.dart';

class IngredientBottomsheet extends StatefulWidget {
  const IngredientBottomsheet({super.key, required this.onSubmitted});

  final void Function(IngredientListEntry ingredient) onSubmitted;

  @override
  State<IngredientBottomsheet> createState() => _IngredientBottomsheetState();
}

class _IngredientBottomsheetState extends State<IngredientBottomsheet> {
  final TextEditingController _amountController = TextEditingController();
  final TextEditingController _ingredientController = TextEditingController();
  final TextEditingController _unitController = TextEditingController();
  bool _isOptional = false;
  Unit? _selectedUnit;

  @override
  Widget build(BuildContext context) {
    return _bottomSheetContent(context);
  }

  Widget _bottomSheetContent(BuildContext context) {
    return Wrap(
      children: [
        Padding(
          padding: EdgeInsets.only(
            top: 20,
            left: 20,
            right: 20,
            bottom: MediaQuery.of(context).viewInsets.bottom,
          ),
          child: Column(
            mainAxisSize: MainAxisSize.max,
            children: [
              SizedBox(
                width: double.infinity,
                child: DropdownMenu<Ingredient?>(
                  enableSearch: true,
                  enableFilter: true,
                  width: double.infinity,
                  requestFocusOnTap: true,
                  controller: _ingredientController,
                  label: const Text('Ingredient'),
                  textStyle:
                      TextStyle(color: Theme.of(context).colorScheme.onSurface),
                  dropdownMenuEntries: [],
                ),
              ),
              Padding(padding: EdgeInsets.only(top: 15)),
              Row(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Flexible(
                    flex: 1,
                    child: TextField(
                      maxLines: 1,
                      maxLength: 4,
                      inputFormatters: [
                        FilteringTextInputFormatter.allow(RegExp(r'\d')),
                      ],
                      controller: _amountController,
                      onTapOutside: (_) =>
                          FocusManager.instance.primaryFocus?.unfocus(),
                      keyboardType: TextInputType.number,
                      textInputAction: TextInputAction.next,
                      decoration: const InputDecoration(
                        label: Text('Amount'),
                        border: OutlineInputBorder(),
                      ),
                      style: TextStyle(
                          color: Theme.of(context).colorScheme.onSurface),
                    ),
                  ),
                  Padding(padding: EdgeInsets.only(left: 10)),
                  Flexible(
                    flex: 1,
                    child: DropdownMenu<Unit?>(
                      label: const Text('Unit'),
                      requestFocusOnTap: false,
                      width: double.infinity,
                      controller: _unitController,
                      onSelected: (value) =>
                          setState(() => _selectedUnit = value),
                      dropdownMenuEntries: CookingUnits.values
                          .map(
                              (e) => DropdownMenuEntry(value: e, label: e.name))
                          .toList(),
                      enableSearch: false,
                      enableFilter: false,
                      textStyle: TextStyle(
                        color: Theme.of(context).colorScheme.onSurface,
                      ),
                    ),
                  ),
                ],
              ),
              Row(
                children: [
                  Text(
                    'optional',
                    style: TextStyle(
                        color: Theme.of(context).colorScheme.onSurface),
                  ),
                  Checkbox(
                    value: _isOptional,
                    onChanged: (_) => setState(
                      () => _isOptional = !_isOptional,
                    ),
                  ),
                ],
              ),
            ],
          ),
        ),
        const SizedBox(
          height: 200,
          width: 400,
        ),
        Padding(
          padding: const EdgeInsets.all(10),
          child: Row(
            mainAxisAlignment: MainAxisAlignment.end,
            children: [
              TextButton(
                onPressed: _cancelTapped,
                child: const Text('Cancel'),
              ),
              TextButton(
                onPressed: _finishTapped,
                child: const Text('Finish'),
              ),
              TextButton(
                onPressed: _nextTapped,
                child: const Text('Next'),
              ),
            ],
          ),
        ),
      ],
    );
  }

  void _nextTapped() {
    final success = _submit();
    if (success) {
      setState(() {
        _ingredientController.value = TextEditingValue.empty;
        _amountController.value = TextEditingValue.empty;
        _unitController.value = TextEditingValue.empty;
        _isOptional = false;
        _selectedUnit = null;
      });
    }
  }

  void _finishTapped() {
    final success = _submit();
    if (success) {
      Navigator.of(context).pop();
    }
  }

  void _cancelTapped() {
    Navigator.of(context).pop();
  }

  bool _submit() {
    final ingredient = Ingredient(
        title: _ingredientController.text, type: IngredientType.other);
    final amount = int.tryParse(_amountController.text);
    if (ingredient.title.isEmpty || _selectedUnit == null || amount == null) {
      return false;
    }

    final newEntry = IngredientListEntry(
        ingredient: ingredient,
        amount: amount,
        unit: _selectedUnit!,
        optional: _isOptional);
    widget.onSubmitted(newEntry);

    return true;
  }
}