import 'dart:async';

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

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

  Completer<DialogResponse> get completer => this._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 = 'Aman Касса',
    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(
      {String title = ' Aman Касса',
      String description,
      String confirmationTitle = 'Ok',
      String cancelTitle = 'Cancel',
      String formatType}) {
    _dialogCompleter = Completer<DialogResponse>();
    _showDialogInputListener(DialogRequest(
        title: title,
        description: description,
        buttonTitle: confirmationTitle,
        cancelTitle: cancelTitle,
        formatType: formatType));
    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;
  }
}