/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */

import {NavigationCancellationCode} from './events';
import {NavigationBehaviorOptions} from './models';
import {isUrlTree, UrlSerializer, UrlTree} from './url_tree';

export const NAVIGATION_CANCELING_ERROR = 'ngNavigationCancelingError';

export type NavigationCancelingError =
    Error&{[NAVIGATION_CANCELING_ERROR]: true, cancellationCode: NavigationCancellationCode};
export type RedirectingNavigationCancelingError = NavigationCancelingError&{
  url: UrlTree;
  navigationBehaviorOptions?: NavigationBehaviorOptions;
  cancellationCode: NavigationCancellationCode.Redirect;
};

export function redirectingNavigationError(
    urlSerializer: UrlSerializer, redirect: UrlTree): RedirectingNavigationCancelingError {
  const {redirectTo, navigationBehaviorOptions} =
      isUrlTree(redirect) ? {redirectTo: redirect, navigationBehaviorOptions: undefined} : redirect;
  const error =
      navigationCancelingError(
          ngDevMode && `Redirecting to "${urlSerializer.serialize(redirectTo)}"`,
          NavigationCancellationCode.Redirect, redirect) as RedirectingNavigationCancelingError;
  error.url = redirectTo;
  error.navigationBehaviorOptions = navigationBehaviorOptions;
  return error;
}

export function navigationCancelingError(
    message: string|null|false, code: NavigationCancellationCode, redirectUrl?: UrlTree) {
  const error =
      new Error('NavigationCancelingError: ' + (message || '')) as NavigationCancelingError;
  error[NAVIGATION_CANCELING_ERROR] = true;
  error.cancellationCode = code;
  if (redirectUrl) {
    (error as RedirectingNavigationCancelingError).url = redirectUrl;
  }
  return error;
}

export function isRedirectingNavigationCancelingError(
    error: unknown|
    RedirectingNavigationCancelingError): error is RedirectingNavigationCancelingError {
  return isNavigationCancelingError(error) && isUrlTree((error as any).url);
}
export function isNavigationCancelingError(error: unknown): error is NavigationCancelingError {
  return error && (error as any)[NAVIGATION_CANCELING_ERROR];
}