import 'package:awesome_extensions/awesome_extensions.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:flutter_form_builder/flutter_form_builder.dart';
import 'package:flutter_translate/flutter_translate.dart';
import 'package:form_builder_validators/form_builder_validators.dart';
import 'package:go_router/go_router.dart';

import '../../layout/default_app_bar.dart';
import '../../theme/theme.dart';
import '../../tools/tools.dart';
import '../../veilid_processor/veilid_processor.dart';
import '../account_manager.dart';

class NewAccountPage extends StatefulWidget {
  const NewAccountPage({super.key});

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

class NewAccountPageState extends State<NewAccountPage> {
  final _formKey = GlobalKey<FormBuilderState>();
  late bool isInAsyncCall = false;
  static const String formFieldName = 'name';
  static const String formFieldPronouns = 'pronouns';

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

    WidgetsBinding.instance.addPostFrameCallback((_) async {
      await changeWindowSetup(
          TitleBarStyle.normal, OrientationCapability.portraitOnly);
    });
  }

  Widget _newAccountForm(BuildContext context,
      {required Future<void> Function(GlobalKey<FormBuilderState>) onSubmit}) {
    final networkReady = context
            .watch<ConnectionStateCubit>()
            .state
            .asData
            ?.value
            .isPublicInternetReady ??
        false;
    final canSubmit = networkReady;

    return FormBuilder(
      key: _formKey,
      child: ListView(
        children: [
          Text(translate('new_account_page.header'))
              .textStyle(context.headlineSmall)
              .paddingSymmetric(vertical: 16),
          FormBuilderTextField(
            autofocus: true,
            name: formFieldName,
            decoration:
                InputDecoration(labelText: translate('account.form_name')),
            maxLength: 64,
            // The validator receives the text that the user has entered.
            validator: FormBuilderValidators.compose([
              FormBuilderValidators.required(),
            ]),
            textInputAction: TextInputAction.next,
          ),
          FormBuilderTextField(
            name: formFieldPronouns,
            maxLength: 64,
            decoration:
                InputDecoration(labelText: translate('account.form_pronouns')),
            textInputAction: TextInputAction.next,
          ),
          Row(children: [
            const Spacer(),
            Text(translate('new_account_page.instructions'))
                .toCenter()
                .flexible(flex: 6),
            const Spacer(),
          ]).paddingSymmetric(vertical: 4),
          ElevatedButton(
            onPressed: !canSubmit
                ? null
                : () async {
                    if (_formKey.currentState?.saveAndValidate() ?? false) {
                      setState(() {
                        isInAsyncCall = true;
                      });
                      try {
                        await onSubmit(_formKey);
                      } finally {
                        if (mounted) {
                          setState(() {
                            isInAsyncCall = false;
                          });
                        }
                      }
                    }
                  },
            child: Text(translate(!networkReady
                ? 'button.waiting_for_network'
                : 'new_account_page.create')),
          ).paddingSymmetric(vertical: 4).alignAtCenterRight(),
        ],
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    final displayModalHUD = isInAsyncCall;

    return Scaffold(
      // resizeToAvoidBottomInset: false,
      appBar: DefaultAppBar(
          title: Text(translate('new_account_page.titlebar')),
          actions: [
            const SignalStrengthMeterWidget(),
            IconButton(
                icon: const Icon(Icons.settings),
                tooltip: translate('app_bar.settings_tooltip'),
                onPressed: () async {
                  await GoRouterHelper(context).push('/settings');
                })
          ]),
      body: _newAccountForm(
        context,
        onSubmit: (formKey) async {
          // dismiss the keyboard by unfocusing the textfield
          FocusScope.of(context).unfocus();

          try {
            final name =
                _formKey.currentState!.fields[formFieldName]!.value as String;
            final pronouns = _formKey.currentState!.fields[formFieldPronouns]!
                    .value as String? ??
                '';
            final newProfileSpec =
                NewProfileSpec(name: name, pronouns: pronouns);

            final superSecret = await AccountRepository.instance
                .createWithNewSuperIdentity(newProfileSpec);

            GoRouterHelper(context).pushReplacement('/new_account/recovery_key',
                extra: superSecret);
          } on Exception catch (e) {
            if (context.mounted) {
              await showErrorModal(context, translate('new_account_page.error'),
                  'Exception: $e');
            }
          }
        },
      ).paddingSymmetric(horizontal: 24, vertical: 8),
    ).withModalHUD(context, displayModalHUD);
  }

  @override
  void debugFillProperties(DiagnosticPropertiesBuilder properties) {
    super.debugFillProperties(properties);
    properties.add(DiagnosticsProperty<bool>('isInAsyncCall', isInAsyncCall));
  }
}