import 'package:diameter/components/detail.dart';
import 'package:diameter/components/dialogs.dart';
import 'package:diameter/components/forms.dart';
import 'package:diameter/config.dart';
import 'package:diameter/models/accuracy.dart';
import 'package:diameter/models/log_entry.dart';
import 'package:diameter/models/log_meal.dart';
import 'package:diameter/models/meal.dart';
import 'package:diameter/models/meal_category.dart';
import 'package:diameter/models/meal_portion_type.dart';
import 'package:diameter/models/meal_source.dart';
import 'package:diameter/navigation.dart';
import 'package:diameter/settings.dart';
import 'package:diameter/utils/utils.dart';
import 'package:flutter/material.dart';

class LogMealDetailScreen extends StatefulWidget {
  static const String routeName = '/log-meal';
  final LogEntry logEntry;
  final LogMeal? logMeal;
  const LogMealDetailScreen({Key? key, required this.logEntry, this.logMeal})
      : super(key: key);

  @override
  _LogMealDetailScreenState createState() => _LogMealDetailScreenState();
}

class _LogMealDetailScreenState extends State<LogMealDetailScreen> {
  final GlobalKey<FormState> _logMealForm = GlobalKey<FormState>();

  final _valueController = TextEditingController(text: '');
  final _carbsRatioController = TextEditingController(text: '');
  final _portionSizeController = TextEditingController(text: '');
  final _carbsPerPortionController = TextEditingController(text: '');
  final _bolusController = TextEditingController(text: '');
  final _delayedBolusRateController = TextEditingController(text: '');
  final _delayedBolusDurationController = TextEditingController(text: '');
  final _notesController = TextEditingController(text: '');
  Meal? _meal;
  MealSource? _mealSource;
  MealCategory? _mealCategory;
  MealPortionType? _mealPortionType;
  Accuracy? _portionSizeAccuracy;
  Accuracy? _carbsRatioAccuracy;

  List<Meal> _meals = [];
  List<MealCategory> _mealCategories = [];
  List<MealPortionType> _mealPortionTypes = [];
  List<MealSource> _mealSources = [];
  List<Accuracy> _portionSizeAccuracies = [];
  List<Accuracy> _carbsRatioAccuracies = [];

  bool _isSaving = false;

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

    _portionSizeAccuracies = Accuracy.getAllForPortionSize();
    _carbsRatioAccuracies = Accuracy.getAllForCarbsRatio();
    _meals = Meal.getAll();
    _mealCategories = MealCategory.getAll();
    _mealPortionTypes = MealPortionType.getAll();
    _mealSources = MealSource.getAll();

    if (widget.logMeal != null) {
      _valueController.text = widget.logMeal!.value;
      _carbsRatioController.text =
          (widget.logMeal!.carbsRatio ?? '').toString();
      _portionSizeController.text =
          (widget.logMeal!.portionSize ?? '').toString();
      _carbsPerPortionController.text =
          (widget.logMeal!.carbsPerPortion ?? '').toString();
      _bolusController.text = (widget.logMeal!.bolus ?? '').toString();
      _delayedBolusRateController.text =
          (widget.logMeal!.delayedBolusRate ?? '').toString();
      _delayedBolusDurationController.text =
          (widget.logMeal!.delayedBolusDuration ?? '').toString();
      _notesController.text = widget.logMeal!.notes ?? '';

      // _meal = widget.logMeal!.meal;
      // _source = widget.logMeal!.source;
      // _category = widget.logMeal!.category;
      // _portionType = widget.logMeal!.portionType;
      // _portionSizeAccuracy = _portionSizeAccuracies.firstWhere((element) =>
      //     element.id ==
      //     int.tryParse(widget.logMeal!.portionSizeAccuracy ?? ''));
      // _carbsRatioAccuracy = _carbsRatioAccuracies.firstWhere((element) =>
      //     element.id == int.tryParse(widget.logMeal!.carbsRatioAccuracy ?? ''));
      // _portionSizeAccuracy = widget.meal!.portionSizeAccuracy;
      // _carbsRatioAccuracy = widget.meal!.carbsRatioAccuracy;
    }
  }

  Future<void> onSelectMeal(Meal meal) async {
    setState(() {
      _meal = meal;
      _valueController.text = meal.value;
      if (meal.carbsRatio != null) {
        _carbsRatioController.text = meal.carbsRatio.toString();
      }
      if (meal.portionSize != null) {
        _portionSizeController.text = meal.portionSize.toString();
      }
      if (meal.carbsPerPortion != null) {
        _carbsPerPortionController.text = meal.carbsPerPortion.toString();
      }
      if (meal.delayedBolusRate != null) {
        _delayedBolusRateController.text = meal.delayedBolusRate.toString();
      }
      if (meal.delayedBolusDuration != null) {
        _delayedBolusDurationController.text =
            meal.delayedBolusDuration.toString();
      }
      if (meal.mealSource.hasValue) {
        _mealSource = meal.mealSource.target;
      }
      if (meal.mealCategory.hasValue) {
        _mealCategory = meal.mealCategory.target;
      }
      if (meal.mealPortionType.hasValue) {
        _mealPortionType = meal.mealPortionType.target;
      }
      if (meal.portionSizeAccuracy.hasValue) {
        _portionSizeAccuracy = meal.portionSizeAccuracy.target;
      }
      if (meal.carbsRatioAccuracy.hasValue) {
        _carbsRatioAccuracy = meal.carbsRatioAccuracy.target;
      }
    });
  }

  void handleSaveAction() async {
    setState(() {
      _isSaving = true;
    });
    if (_logMealForm.currentState!.validate()) {
      bool isNew = widget.logMeal == null;
      // isNew
      //     ? await LogMeal.save(
      //         logEntry: widget.logEntry.objectId!,
      //         meal: _meal,
      //         value: _valueController.text,
      //         source: _mealSource,
      //         category: _category,
      //         portionType: _portionType,
      //         carbsRatio: double.tryParse(_carbsRatioController.text),
      //         portionSize: double.tryParse(_portionSizeController.text),
      //         carbsPerPortion: double.tryParse(_carbsPerPortionController.text),
      //         // portionSizeAccuracy: _portionSizeAccuracy,
      //         // carbsRatioAccuracy: _carbsRatioAccuracy,
      //         portionSizeAccuracy: _portionSizeAccuracy?.id.toString(),
      //         carbsRatioAccuracy: _carbsRatioAccuracy?.id.toString(),
      //         bolus: double.tryParse(_bolusController.text),
      //         delayedBolusDuration:
      //             int.tryParse(_delayedBolusDurationController.text),
      //         delayedBolusRate:
      //             double.tryParse(_delayedBolusRateController.text),
      //         notes: _notesController.text,
      //       )
      //     : await LogMeal.update(
      //         widget.logMeal!.objectId!,
      //         meal: _meal,
      //         value: _valueController.text,
      //         source: _mealSource,
      //         category: _category,
      //         portionType: _portionType,
      //         carbsRatio: double.tryParse(_carbsRatioController.text),
      //         portionSize: double.tryParse(_portionSizeController.text),
      //         carbsPerPortion: double.tryParse(_carbsPerPortionController.text),
      //         // portionSizeAccuracy: _portionSizeAccuracy,
      //         // carbsRatioAccuracy: _carbsRatioAccuracy,
      //         portionSizeAccuracy: _portionSizeAccuracy?.id.toString(),
      //         carbsRatioAccuracy: _carbsRatioAccuracy?.id.toString(),
      //         bolus: double.tryParse(_bolusController.text),
      //         delayedBolusDuration:
      //             int.tryParse(_delayedBolusDurationController.text),
      //         delayedBolusRate:
      //             double.tryParse(_delayedBolusRateController.text),
      //         notes: _notesController.text,
      //       );
      LogMeal logMeal = LogMeal(
        id: widget.logMeal?.id ?? 0,
        value: _valueController.text,
        carbsRatio: double.tryParse(_carbsRatioController.text),
        portionSize: double.tryParse(_portionSizeController.text),
        carbsPerPortion: double.tryParse(_carbsPerPortionController.text),
        bolus: double.tryParse(_bolusController.text),
        delayedBolusDuration:
            int.tryParse(_delayedBolusDurationController.text),
        delayedBolusRate: double.tryParse(_delayedBolusRateController.text),
        notes: _notesController.text,
      );
      logMeal.meal.target = _meal;
      logMeal.mealSource.target = _mealSource;
      logMeal.mealCategory.target = _mealCategory;
      logMeal.mealPortionType.target = _mealPortionType;
      logMeal.portionSizeAccuracy.target = _portionSizeAccuracy;
      logMeal.carbsRatioAccuracy.target = _carbsRatioAccuracy;
      
      LogMeal.put(logMeal);
      Navigator.pop(context, '${isNew ? 'New' : ''} Meal Saved');
    }
    setState(() {
      _isSaving = false;
    });
  }

  void handleCancelAction() {
    bool isNew = widget.logMeal == null;
    if (showConfirmationDialogOnCancel &&
        ((isNew &&
                (_valueController.text != '' ||
                    _meal != null ||
                    _mealSource != null ||
                    _mealCategory != null ||
                    _mealPortionType != null ||
                    double.tryParse(_carbsRatioController.text) != null ||
                    double.tryParse(_portionSizeController.text) != null ||
                    double.tryParse(_carbsPerPortionController.text) != null ||
                    _carbsRatioAccuracy != null ||
                    _portionSizeAccuracy != null ||
                    double.tryParse(_bolusController.text) != null ||
                    int.tryParse(_delayedBolusDurationController.text) !=
                        null ||
                    double.tryParse(_delayedBolusRateController.text) != null ||
                    _notesController.text != '')) ||
            (!isNew &&
                (_valueController.text != widget.logMeal!.value ||
                    _meal != widget.logMeal!.meal.target ||
                    _mealSource != widget.logMeal!.mealSource.target ||
                    _mealCategory != widget.logMeal!.mealCategory.target ||
                    _mealPortionType != widget.logMeal!.mealPortionType.target ||
                    double.tryParse(_carbsRatioController.text) !=
                        widget.logMeal!.carbsRatio ||
                    double.tryParse(_portionSizeController.text) !=
                        widget.logMeal!.portionSize ||
                    double.tryParse(_carbsPerPortionController.text) !=
                        widget.logMeal!.carbsPerPortion ||
                    // _carbsRatioAccuracy != widget.logMeal!.carbsRatioAccuracy ||
                    // _portionSizeAccuracy !=
                    //     widget.logMeal!.portionSizeAccuracy ||
                    _carbsRatioAccuracy !=
                        widget.logMeal!.carbsRatioAccuracy.target ||
                    _portionSizeAccuracy !=
                        widget.logMeal!.portionSizeAccuracy.target ||
                    double.tryParse(_bolusController.text) !=
                        widget.logMeal!.bolus ||
                    int.tryParse(_delayedBolusDurationController.text) !=
                        widget.logMeal!.delayedBolusDuration ||
                    double.tryParse(_delayedBolusRateController.text) !=
                        widget.logMeal!.delayedBolusRate ||
                    _notesController.text != (widget.logMeal!.notes ?? ''))))) {
      Dialogs.showCancelConfirmationDialog(
        context: context,
        isNew: isNew,
        onSave: handleSaveAction,
      );
    } else {
      Navigator.pop(context);
    }
  }

  void calculateThirdMeasurementOfPortionCarbsRelation(
      {PortionCarbsParameter? parameterToBeCalculated}) {
    double? carbsRatio;
    double? portionSize;
    double? carbsPerPortion;

    if (parameterToBeCalculated != PortionCarbsParameter.carbsRatio &&
        _carbsRatioController.text != '') {
      carbsRatio = double.tryParse(_carbsRatioController.text);
    }
    if (parameterToBeCalculated != PortionCarbsParameter.portionSize &&
        _portionSizeController.text != '') {
      portionSize = double.tryParse(_portionSizeController.text);
    }
    if (parameterToBeCalculated != PortionCarbsParameter.carbsPerPortion &&
        _carbsRatioController.text != '') {
      carbsPerPortion = double.tryParse(_carbsPerPortionController.text);
    }

    if (carbsRatio != null && portionSize != null && carbsPerPortion == null) {
      setState(() {
        _carbsPerPortionController.text =
            Utils.calculateCarbsPerPortion(carbsRatio!, portionSize!)
                .toString();
      });
    }
    if (carbsRatio == null && portionSize != null && carbsPerPortion != null) {
      setState(() {
        _carbsRatioController.text =
            Utils.calculateCarbsRatio(carbsPerPortion!, portionSize!)
                .toString();
      });
    }
    if (carbsRatio != null && portionSize == null && carbsPerPortion != null) {
      setState(() {
        _portionSizeController.text =
            Utils.calculatePortionSize(carbsRatio!, carbsPerPortion!)
                .toString();
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    bool isNew = widget.logMeal == null;
    return Scaffold(
      appBar: AppBar(
        title: Text(isNew ? 'New Meal' : widget.logMeal!.value),
      ),
      drawer: const Navigation(currentLocation: LogMealDetailScreen.routeName),
      body: SingleChildScrollView(
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: <Widget>[
            FormWrapper(
              formState: _logMealForm,
              fields: [
                TextFormField(
                  controller: _valueController,
                  decoration: const InputDecoration(
                    labelText: 'Name',
                  ),
                  validator: (value) {
                    if (value!.trim().isEmpty) {
                      return 'Empty name';
                    }
                    return null;
                  },
                ),
                LabeledDropdownButton<Meal>(
                  selectedItem: _meal,
                  label: 'Meal',
                  items: _meals,
                  // getItemValue: (item) => item.objectId,
                  renderItem: (item) => Text(item.value),
                  onChanged: (value) {
                    if (value != null) {
                      onSelectMeal(value);
                    }
                  },
                ),
                LabeledDropdownButton<MealSource>(
                  selectedItem: _mealSource,
                  label: 'Meal Source',
                  items: _mealSources,
                  // getItemValue: (item) => item.objectId,
                  renderItem: (item) => Text(item.value),
                  onChanged: (value) {
                    setState(() {
                      _mealSource = value;
                    });
                  },
                ),
                LabeledDropdownButton<MealCategory>(
                  selectedItem: _mealCategory,
                  label: 'Meal Category',
                  items: _mealCategories,
                  // getItemValue: (item) => item.objectId,
                  renderItem: (item) => Text(item.value),
                  onChanged: (value) {
                    setState(() {
                      _mealCategory = value;
                    });
                  },
                ),
                LabeledDropdownButton<MealPortionType>(
                  selectedItem: _mealPortionType,
                  label: 'Meal Portion Type',
                  items: _mealPortionTypes,
                  // getItemValue: (item) => item.objectId,
                  renderItem: (item) => Text(item.value),
                  onChanged: (value) {
                    setState(() {
                      _mealPortionType = value;
                    });
                  },
                ),
                Row(
                  children: [
                    Expanded(
                      child: TextFormField(
                        decoration: const InputDecoration(
                          labelText: 'Carbs ratio',
                          suffixText: '%',
                        ),
                        controller: _carbsRatioController,
                        keyboardType: const TextInputType.numberWithOptions(
                            decimal: true),
                        onChanged: (_) =>
                            calculateThirdMeasurementOfPortionCarbsRelation(),
                      ),
                    ),
                    IconButton(
                      onPressed: () =>
                          calculateThirdMeasurementOfPortionCarbsRelation(
                              parameterToBeCalculated:
                                  PortionCarbsParameter.carbsRatio),
                      icon: const Icon(Icons.calculate),
                    ),
                  ],
                ),
                Row(
                  mainAxisSize: MainAxisSize.min,
                  children: [
                    Expanded(
                      child: TextFormField(
                        decoration: InputDecoration(
                          labelText: 'Portion size',
                          suffixText:
                              nutritionMeasurement == NutritionMeasurement.grams
                                  ? 'g'
                                  : nutritionMeasurement ==
                                          NutritionMeasurement.ounces
                                      ? 'oz'
                                      : '',
                          alignLabelWithHint: true,
                        ),
                        controller: _portionSizeController,
                        keyboardType: const TextInputType.numberWithOptions(
                            decimal: true),
                        onChanged: (_) =>
                            calculateThirdMeasurementOfPortionCarbsRelation(),
                      ),
                    ),
                    IconButton(
                      onPressed: () =>
                          calculateThirdMeasurementOfPortionCarbsRelation(
                              parameterToBeCalculated:
                                  PortionCarbsParameter.portionSize),
                      icon: const Icon(Icons.calculate),
                    ),
                  ],
                ),
                LabeledDropdownButton<Accuracy>(
                  selectedItem: _portionSizeAccuracy,
                  label: 'Portion Size Accuracy',
                  items: _portionSizeAccuracies,
                  // getItemValue: (item) => item.objectId,
                  renderItem: (item) => Text(item.value),
                  onChanged: (value) {
                    setState(() {
                      _portionSizeAccuracy = value;
                    });
                  },
                ),
                // StyledFutureDropdownButton<Accuracy>(
                //   selectedItem: _portionSizeAccuracy,
                //   label: 'Portion Size Accuracy',
                //   items: _portionSizeAccuracies,
                //   getItemValue: (item) => item.objectId,
                //   renderItem: (item) => Text(item.value),
                //   onChanged: (value) {
                //     setState(() {
                //       _portionSizeAccuracy = value;
                //     });
                //   },
                // ),
                Row(
                  children: [
                    Expanded(
                      child: TextFormField(
                        decoration: InputDecoration(
                          labelText: 'Carbs per portion',
                          suffixText:
                              nutritionMeasurement == NutritionMeasurement.grams
                                  ? 'g'
                                  : nutritionMeasurement ==
                                          NutritionMeasurement.ounces
                                      ? 'oz'
                                      : '',
                        ),
                        controller: _carbsPerPortionController,
                        keyboardType: const TextInputType.numberWithOptions(
                            decimal: true),
                        onChanged: (_) =>
                            calculateThirdMeasurementOfPortionCarbsRelation(),
                      ),
                    ),
                    IconButton(
                      onPressed: () =>
                          calculateThirdMeasurementOfPortionCarbsRelation(
                              parameterToBeCalculated:
                                  PortionCarbsParameter.carbsPerPortion),
                      icon: const Icon(Icons.calculate),
                    ),
                  ],
                ),
                LabeledDropdownButton<Accuracy>(
                  selectedItem: _carbsRatioAccuracy,
                  label: 'Carbs Ratio Accuracy',
                  items: _carbsRatioAccuracies,
                  // getItemValue: (item) => item.objectId,
                  renderItem: (item) => Text(item.value),
                  onChanged: (value) {
                    setState(() {
                      _carbsRatioAccuracy = value;
                    });
                  },
                ),
                // StyledFutureDropdownButton<Accuracy>(
                //   selectedItem: _carbsRatioAccuracy,
                //   label: 'Carbs Ratio Accuracy',
                //   items: _carbsRatioAccuracies,
                //   getItemValue: (item) => item.objectId,
                //   renderItem: (item) => Text(item.value),
                //   onChanged: (value) {
                //     setState(() {
                //       _carbsRatioAccuracy = value;
                //     });
                //   },
                // ),
                TextFormField(
                  decoration: const InputDecoration(
                    labelText: 'Bolus Units',
                    suffixText: ' U',
                  ),
                  controller: _bolusController,
                  keyboardType:
                      const TextInputType.numberWithOptions(decimal: true),
                ),
                TextFormField(
                  decoration: const InputDecoration(
                    labelText: 'Delayed Bolus Duration',
                    suffixText: ' min',
                  ),
                  controller: _delayedBolusDurationController,
                  keyboardType: const TextInputType.numberWithOptions(),
                ),
                TextFormField(
                  decoration: const InputDecoration(
                    labelText: 'Delayed Bolus Units',
                    suffixText: ' U',
                    alignLabelWithHint: true,
                  ),
                  controller: _delayedBolusRateController,
                  keyboardType:
                      const TextInputType.numberWithOptions(decimal: true),
                ),
                TextFormField(
                  controller: _notesController,
                  decoration: const InputDecoration(
                    labelText: 'Notes',
                    alignLabelWithHint: true,
                  ),
                  keyboardType: TextInputType.multiline,
                ),
              ],
            ),
          ],
        ),
      ),
      bottomNavigationBar: DetailBottomRow(
        onCancel: handleCancelAction,
        onSave: _isSaving ? null : handleSaveAction,
      ),
    );
  }
}