import 'dart:async';

import 'package:flutter/cupertino.dart';
import 'package:satu/core/models/dialog_models.dart';

class DialogService {
  final GlobalKey<NavigatorState> _dialogNavigationKey =
      GlobalKey<NavigatorState>();
  late Function(DialogRequest)? _showDialogListener;
  late Function(DialogRequest)? _showDialogInputListener;
  Completer<DialogResponse>? _dialogCompleter;

  Completer<DialogResponse>? get completer => _dialogCompleter;

  GlobalKey<NavigatorState> get dialogNavigationKey => _dialogNavigationKey;

  /// Registers a callback function. Typically to show the dialog
  void registerDialogListener(Function(DialogRequest) showDialogListener,
      Function(DialogRequest) showDialogInputListener) {
    _showDialogListener = showDialogListener;
    _showDialogInputListener = showDialogInputListener;
  }

  /// Calls the dialog listener and returns a Future that will wait for dialogComplete.
  Future<DialogResponse> showDialog({
    String title = 'SATU',
    String? description,
    String buttonTitle = 'Ok',
  }) {
    _dialogCompleter = Completer<DialogResponse>();
    _showDialogListener!(DialogRequest(
      title: title,
      description: description ?? '',
      buttonTitle: buttonTitle,
    ));
    return _dialogCompleter!.future;
  }

  /// Shows a confirmation dialog
  Future<DialogResponse> showConfirmationDialog(
      {String? title,
      String? description,
      String confirmationTitle = 'Ok',
      String cancelTitle = 'Cancel'}) {
    _dialogCompleter = Completer<DialogResponse>();
    _showDialogListener!(DialogRequest(
        title: title ?? '',
        description: description ?? '',
        buttonTitle: confirmationTitle,
        cancelTitle: cancelTitle));
    return _dialogCompleter!.future;
  }

  Future<DialogResponse> showConfirmationDialogInput({
    required String title,
    required String requestPrice,
    required String requestCount,
    String? description,
    String confirmationTitle = 'ПОДТВЕРДИТЬ',
    String cancelTitle = 'Отмена',
  }) {
    _dialogCompleter = Completer<DialogResponse>();
    _showDialogInputListener!(DialogRequest(
        title: title,
        description: description ?? '',
        buttonTitle: confirmationTitle,
        cancelTitle: cancelTitle,
        requestPrice: requestPrice,
        requestCount: requestCount));
    return _dialogCompleter!.future;
  }

  /// Completes the _dialogCompleter to resume the Future's execution call
  void dialogComplete(DialogResponse response) {
    _dialogNavigationKey.currentState!.pop();
    _dialogCompleter!.complete(response);
    _dialogCompleter = null;
  }
}