import 'package:flutter/foundation.dart';
import 'package:flutter/material.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/color_picker.dart';
import 'package:invoiceninja_flutter/ui/app/forms/decorated_form_field.dart';
import 'package:invoiceninja_flutter/ui/app/edit_scaffold.dart';
import 'package:invoiceninja_flutter/ui/settings/user_details_vm.dart';
import 'package:invoiceninja_flutter/utils/completers.dart';
import 'package:invoiceninja_flutter/utils/localization.dart';

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

  final UserDetailsVM viewModel;

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

class _UserDetailsState extends State<UserDetails> {
  static final GlobalKey<FormState> _formKey =
      GlobalKey<FormState>(debugLabel: '_userDetails');
  FocusScopeNode _focusNode;
  bool autoValidate = false;

  final _firstNameController = TextEditingController();
  final _lastNameController = TextEditingController();
  final _phoneController = TextEditingController();
  final _emailController = TextEditingController();

  List<TextEditingController> _controllers = [];
  final _debouncer = Debouncer();

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

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

  @override
  void didChangeDependencies() {
    _controllers = [
      _firstNameController,
      _lastNameController,
      _emailController,
      _phoneController,
    ];

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

    final user = widget.viewModel.state.user;
    _firstNameController.text = user.firstName;
    _lastNameController.text = user.lastName;
    _emailController.text = user.email;
    _phoneController.text = user.phone;

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

    super.didChangeDependencies();
  }

  void _onChanged() {
    _debouncer.run(() {
      final user = widget.viewModel.user.rebuild((b) => b
        ..firstName = _firstNameController.text.trim()
        ..lastName = _lastNameController.text.trim()
        ..email = _emailController.text.trim()
        ..firstName = _firstNameController.text.trim());
      if (user != widget.viewModel.user) {
        widget.viewModel.onChanged(user);
      }
    });
  }

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

    return EditScaffold(
      title: localization.userDetails,
      onSavePressed: viewModel.onSavePressed,
      body: AppForm(
        focusNode: _focusNode,
        formKey: _formKey,
        children: <Widget>[
          FormCard(children: <Widget>[
            DecoratedFormField(
              label: localization.firstName,
              controller: _firstNameController,
              validator: (val) => val.isEmpty || val.trim().isEmpty
                  ? localization.pleaseEnterAFirstName
                  : null,
              autovalidate: autoValidate,
            ),
            DecoratedFormField(
              label: localization.lastName,
              controller: _lastNameController,
              validator: (val) => val.isEmpty || val.trim().isEmpty
                  ? localization.pleaseEnterALastName
                  : null,
              autovalidate: autoValidate,
            ),
            DecoratedFormField(
              label: localization.email,
              controller: _emailController,
              validator: (val) => val.isEmpty || val.trim().isEmpty
                  ? localization.pleaseEnterYourEmail
                  : null,
              autovalidate: autoValidate,
            ),
            DecoratedFormField(
              label: localization.phone,
              controller: _phoneController,
            ),
          ]),
          FormCard(
            children: <Widget>[
              FormColorPicker(
                labelText: localization.accentColor,
                initialValue: user.userCompany.settings.accentColor,
                onSelected: (value) {
                  widget.viewModel.onChanged(user.rebuild(
                      (b) => b..userCompany.settings.accentColor = value));
                },
              ),
            ],
          ),
        ],
      ),
    );
  }
}