// Flutter imports:
import 'package:flutter/material.dart';

// Project imports:
import 'package:invoiceninja_flutter/ui/app/edit_scaffold.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/app/forms/decorated_form_field.dart';
import 'package:invoiceninja_flutter/ui/settings/product_settings_vm.dart';
import 'package:invoiceninja_flutter/utils/completers.dart';
import 'package:invoiceninja_flutter/utils/formatting.dart';
import 'package:invoiceninja_flutter/utils/localization.dart';

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

  final ProductSettingsVM viewModel;

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

class _ProductSettingsState extends State<ProductSettings> {
  static final GlobalKey<FormState> _formKey =
      GlobalKey<FormState>(debugLabel: '_productSettings');
  FocusScopeNode? _focusNode;
  final _debouncer = Debouncer();
  final _stockThresholdController = TextEditingController();
  List<TextEditingController> _controllers = [];

  @override
  void initState() {
    super.initState();
    _focusNode = FocusScopeNode();
  }

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

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

    final viewModel = widget.viewModel;
    final company = viewModel.state.company;

    _stockThresholdController.text = company.stockNotificationThreshold == 0
        ? ''
        : formatNumber(
            company.stockNotificationThreshold.toDouble(),
            context,
            formatNumberType: FormatNumberType.int,
          )!;

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

    super.didChangeDependencies();
  }

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

  void _onChanged() {
    final company = widget.viewModel.company.rebuild((b) => b
      ..stockNotificationThreshold =
          parseInt(_stockThresholdController.text.trim()));
    if (company != widget.viewModel.company) {
      _debouncer.run(() {
        widget.viewModel.onCompanyChanged(company);
      });
    }
  }

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

    return EditScaffold(
      title: localization.productSettings,
      onSavePressed: viewModel.onSavePressed,
      body: AppForm(
        formKey: _formKey,
        focusNode: _focusNode,
        children: <Widget>[
          FormCard(
            children: [
              SwitchListTile(
                activeColor: Theme.of(context).colorScheme.secondary,
                title: Text(localization.trackInventory),
                value: company.trackInventory,
                subtitle: Text(localization.trackInventoryHelp),
                onChanged: (value) => viewModel.onCompanyChanged(
                    company.rebuild((b) => b..trackInventory = value)),
              ),
              SwitchListTile(
                activeColor: Theme.of(context).colorScheme.secondary,
                title: Text(localization.stockNotifications),
                value: company.stockNotification,
                subtitle: Text(localization.stockNotificationsHelp),
                onChanged: (value) => viewModel.onCompanyChanged(
                    company.rebuild((b) => b..stockNotification = value)),
              ),
              if (company.trackInventory && company.stockNotification)
                DecoratedFormField(
                  keyboardType: TextInputType.number,
                  controller: _stockThresholdController,
                  label: localization.notificationThreshold,
                ),
            ],
          ),
          FormCard(
            children: <Widget>[
              SwitchListTile(
                activeColor: Theme.of(context).colorScheme.secondary,
                title: Text(localization.showProductDiscount),
                value: company.enableProductDiscount,
                subtitle: Text(localization.showProductDiscountHelp),
                onChanged: (value) => viewModel.onCompanyChanged(
                    company.rebuild((b) => b..enableProductDiscount = value)),
              ),
              SwitchListTile(
                activeColor: Theme.of(context).colorScheme.secondary,
                title: Text(localization.showProductCost),
                value: company.enableProductCost,
                subtitle: Text(localization.showCostHelp),
                onChanged: (value) => viewModel.onCompanyChanged(
                    company.rebuild((b) => b..enableProductCost = value)),
              ),
              SwitchListTile(
                activeColor: Theme.of(context).colorScheme.secondary,
                title: Text(localization.showProductQuantity),
                value: company.enableProductQuantity,
                subtitle: Text(localization.showProductQuantityHelp),
                onChanged: (value) => viewModel.onCompanyChanged(
                    company.rebuild((b) => b..enableProductQuantity = value)),
              ),
              SwitchListTile(
                activeColor: Theme.of(context).colorScheme.secondary,
                title: Text(localization.defaultQuantity),
                value: company.defaultQuantity,
                subtitle: Text(localization.defaultQuantityHelp),
                onChanged: (value) => viewModel.onCompanyChanged(
                    company.rebuild((b) => b..defaultQuantity = value)),
              ),
            ],
          ),
          FormCard(
            isLast: true,
            children: <Widget>[
              SwitchListTile(
                activeColor: Theme.of(context).colorScheme.secondary,
                title: Text(localization.showProductDescription),
                value: company.showProductDetails,
                subtitle: Text(localization.showProductDescriptionHelp),
                onChanged: (value) => viewModel.onCompanyChanged(
                    company.rebuild((b) => b..showProductDetails = value)),
              ),
              SwitchListTile(
                activeColor: Theme.of(context).colorScheme.secondary,
                title: Text(localization.fillProducts),
                value: company.fillProducts,
                subtitle: Text(localization.fillProductsHelp),
                onChanged: (value) => viewModel.onCompanyChanged(
                    company.rebuild((b) => b..fillProducts = value)),
              ),
              SwitchListTile(
                activeColor: Theme.of(context).colorScheme.secondary,
                title: Text(localization.updateProducts),
                value: company.updateProducts,
                subtitle: Text(localization.updateProductsHelp),
                onChanged: (value) => viewModel.onCompanyChanged(
                    company.rebuild((b) => b..updateProducts = value)),
              ),
              SwitchListTile(
                activeColor: Theme.of(context).colorScheme.secondary,
                title: Text(localization.convertProducts),
                value: company.convertProductExchangeRate,
                subtitle: Text(localization.convertProductsHelp),
                onChanged: (value) => viewModel.onCompanyChanged(company
                    .rebuild((b) => b..convertProductExchangeRate = value)),
              ),
              Padding(
                padding: const EdgeInsets.symmetric(horizontal: 16),
                child: BoolDropdownButton(
                  label: localization.convertTo,
                  value: company.convertRateToClient,
                  onChanged: (value) => viewModel.onCompanyChanged(
                    company.rebuild((b) => b..convertRateToClient = value),
                  ),
                  enabledLabel: localization.clientCurrency,
                  disabledLabel: localization.companyCurrency,
                ),
              )
            ],
          ),
        ],
      ),
    );
  }
}