import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:font_awesome_flutter/font_awesome_flutter.dart';
import 'package:invoiceninja_flutter/constants.dart';
import 'package:invoiceninja_flutter/data/models/entities.dart';
import 'package:invoiceninja_flutter/redux/static/static_selectors.dart';
import 'package:invoiceninja_flutter/ui/app/entity_dropdown.dart';
import 'package:invoiceninja_flutter/ui/app/form_card.dart';
import 'package:invoiceninja_flutter/ui/app/forms/app_form.dart';
import 'package:invoiceninja_flutter/ui/app/forms/bool_dropdown_button.dart';
import 'package:invoiceninja_flutter/ui/settings/localization_vm.dart';
import 'package:invoiceninja_flutter/ui/settings/settings_scaffold.dart';
import 'package:invoiceninja_flutter/utils/completers.dart';
import 'package:invoiceninja_flutter/utils/formatting.dart';
import 'package:invoiceninja_flutter/utils/localization.dart';

class LocalizationSettings extends StatefulWidget {
  const LocalizationSettings({
    Key key,
    @required this.viewModel,
  }) : super(key: key);

  final LocalizationSettingsVM viewModel;

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

class _LocalizationSettingsState extends State<LocalizationSettings> {
  static final GlobalKey<FormState> _formKey = GlobalKey<FormState>();
  final _debouncer = Debouncer();

  bool autoValidate = false;

  final _firstNameController = TextEditingController();

  List<TextEditingController> _controllers = [];

  @override
  void dispose() {
    _controllers.forEach((dynamic controller) {
      controller.removeListener(_onChanged);
      controller.dispose();
    });
    super.dispose();
  }

  @override
  void didChangeDependencies() {
    _controllers = [_firstNameController];

    _controllers
        .forEach((dynamic controller) => controller.removeListener(_onChanged));

    /*
    final product = widget.viewModel.product;
    _productKeyController.text = product.productKey;
      */

    _controllers
        .forEach((dynamic controller) => controller.addListener(_onChanged));

    super.didChangeDependencies();
  }

  void _onChanged() {
    /*
    final product = widget.viewModel.product.rebuild((b) => b
      ..customValue2 = _custom2Controller.text.trim());
    if (product != widget.viewModel.product) {
      widget.viewModel.onChanged(product);
    }
    */
  }

  @override
  Widget build(BuildContext context) {
    final localization = AppLocalization.of(context);
    final viewModel = widget.viewModel;
    final state = viewModel.state;
    final settings = viewModel.settings;
    final company = viewModel.company;

    return SettingsScaffold(
      title: localization.localization,
      onSavePressed: viewModel.onSavePressed,
      body: AppForm(
        formKey: _formKey,
        children: <Widget>[
          FormCard(
            children: <Widget>[
              EntityDropdown(
                allowClearing: state.settingsUIState.isFiltered,
                key: ValueKey('__currency_${settings.currencyId}'),
                entityType: EntityType.currency,
                entityMap: state.staticState.currencyMap,
                entityList: memoizedCurrencyList(state.staticState.currencyMap),
                labelText: localization.currency,
                initialValue:
                    state.staticState.currencyMap[settings.currencyId]?.name,
                onSelected: (SelectableEntity currency) =>
                    viewModel.onSettingsChanged(
                        settings.rebuild((b) => b..currencyId = currency?.id)),
              ),
              BoolDropdownButton(
                value: settings.showCurrencyCode,
                label: localization.currencyFormat,
                onChanged: (value) => viewModel.onSettingsChanged(
                    settings.rebuild((b) => b..showCurrencyCode = value)),
                showBlank: state.settingsUIState.isFiltered,
                enabledLabel: '${localization.code}: ' +
                    formatNumber(1000, context,
                        showCurrencyCode: true,
                        currencyId: settings.currencyId),
                disabledLabel: '${localization.symbol}: ' +
                    formatNumber(1000, context,
                        showCurrencyCode: false,
                        currencyId: settings.currencyId),
              ),
              EntityDropdown(
                allowClearing: state.settingsUIState.isFiltered,
                key: ValueKey('__language_${settings.languageId}'),
                entityType: EntityType.language,
                entityMap: state.staticState.languageMap,
                entityList: memoizedLanguageList(state.staticState.languageMap),
                labelText: localization.language,
                initialValue:
                    state.staticState.languageMap[settings.languageId]?.name,
                onSelected: (SelectableEntity language) =>
                    viewModel.onSettingsChanged(
                        settings.rebuild((b) => b..languageId = language?.id)),
              ),
              EntityDropdown(
                allowClearing: state.settingsUIState.isFiltered,
                key: ValueKey('__timezone_${settings.timezoneId}'),
                entityType: EntityType.timezone,
                entityMap: state.staticState.timezoneMap,
                entityList: memoizedTimezoneList(state.staticState.timezoneMap),
                labelText: localization.timezone,
                initialValue:
                    state.staticState.timezoneMap[settings.timezoneId]?.name,
                onSelected: (SelectableEntity timezone) =>
                    viewModel.onSettingsChanged(
                        settings.rebuild((b) => b..timezoneId = timezone?.id)),
              ),
              EntityDropdown(
                allowClearing: state.settingsUIState.isFiltered,
                key: ValueKey('__date_format_${settings.dateFormatId}'),
                entityType: EntityType.dateFormat,
                entityMap: state.staticState.dateFormatMap,
                entityList:
                    memoizedDateFormatList(state.staticState.dateFormatMap),
                labelText: localization.dateFormat,
                initialValue: state
                    .staticState.dateFormatMap[settings.dateFormatId]?.preview,
                onSelected: (SelectableEntity dateFormat) =>
                    viewModel.onSettingsChanged(settings
                        .rebuild((b) => b..dateFormatId = dateFormat?.id)),
              ),
              BoolDropdownButton(
                iconData: FontAwesomeIcons.clock,
                label: localization.militaryTime,
                showBlank: state.settingsUIState.isFiltered,
                value: settings.enableMilitaryTime,
                onChanged: (value) => viewModel.onSettingsChanged(
                    settings.rebuild((b) => b..enableMilitaryTime = value)),
              ),
            ],
          ),
          if (!state.settingsUIState.isFiltered)
            FormCard(
              children: <Widget>[
                InputDecorator(
                  decoration: InputDecoration(
                    labelText: localization.firstDayOfTheWeek,
                  ),
                  isEmpty: company.startOfWeek == null,
                  child: DropdownButtonHideUnderline(
                    child: DropdownButton<int>(
                        value: company.startOfWeek,
                        isExpanded: true,
                        isDense: true,
                        onChanged: (value) => viewModel.onCompanyChanged(
                            company.rebuild((b) => b..startOfWeek = value)),
                        items: kDaysOfTheWeek
                            .map((id, day) =>
                                MapEntry<int, DropdownMenuItem<int>>(
                                    id,
                                    DropdownMenuItem<int>(
                                      child: Text(localization.lookup(day)),
                                      value: id,
                                    )))
                            .values
                            .toList()),
                  ),
                ),
                InputDecorator(
                  decoration: InputDecoration(
                    labelText: localization.firstMonthOfTheYear,
                  ),
                  isEmpty: company.financialYearStart == null,
                  child: DropdownButtonHideUnderline(
                    child: DropdownButton<int>(
                        value: company.financialYearStart,
                        isExpanded: true,
                        isDense: true,
                        onChanged: (value) => viewModel.onCompanyChanged(company
                            .rebuild((b) => b..financialYearStart = value)),
                        items: kMonthsOfTheYear
                            .map((id, month) =>
                                MapEntry<int, DropdownMenuItem<int>>(
                                    id,
                                    DropdownMenuItem<int>(
                                      child: Text(localization.lookup(month)),
                                      value: id,
                                    )))
                            .values
                            .toList()),
                  ),
                ),
              ],
            ),
        ],
      ),
    );
  }
}