import { OnDestroy } from '@angular/core';
import { SocialAuthStrategy } from '../social-auth-strategy';
import { Observable } from 'rxjs';
import { NgxSocialAuthProviderType } from '../../social-auth-provider-type.enum';
import { NgxSocialAuthResponse } from '../../auth-response/social-auth-response';
import { SocialAuthUtilService } from '../../core/social-auth-util.service';
import { SocialAuthConfigMap } from '../../provider/social-auth-config-map';
import { SignInOptionsMap } from '../options-map/sign-in-options-map';
import { StateOptionsMap } from '../options-map/state-options-map';
/**
 * Implements authentication by Google
 *
 * @author Dmytro Parfenov <dmitryparfenov937@gmail.com>
 *
 * @dynamic
 * @see https://angular.io/guide/angular-compiler-options#strictmetadataemit
 */
export declare class GoogleAuthStrategyService implements SocialAuthStrategy<NgxSocialAuthProviderType.Google>, OnDestroy {
    private readonly socialAuthUtilService;
    private readonly googleAuthConfig;
    private readonly document;
    /**
     * A behaviour subject that emits google auth instance
     */
    private googleAuth$$;
    /**
     * @see https://developers.google.com/identity/sign-in/web/reference#auth_setup
     */
    private readonly APIUrl;
    /**
     * @see https://developers.google.com/identity/sign-in/web/reference#auth_setup
     */
    private readonly APIName;
    /**
     * An instance of Google API
     */
    private get gapi();
    constructor(socialAuthUtilService: SocialAuthUtilService, googleAuthConfig: SocialAuthConfigMap[NgxSocialAuthProviderType.Google], document: Document);
    ngOnDestroy(): void;
    isSupport(type: NgxSocialAuthProviderType): boolean;
    singIn(options?: SignInOptionsMap[NgxSocialAuthProviderType.Google]): Observable<NgxSocialAuthResponse<NgxSocialAuthProviderType.Google>>;
    signOut(): Observable<void>;
    getState(options?: StateOptionsMap[NgxSocialAuthProviderType.Google]): Observable<NgxSocialAuthResponse<NgxSocialAuthProviderType.Google>>;
    /**
     * Returns generic auth response object based on google user
     */
    private fromGoogleUser;
    private isValidProviderResponse;
    private getGoogleAuth;
    private handleGoogleAuth;
    private handleGoogleAuthError;
    private loadAuthInstance;
    private handleGapiLoading;
    private initAuthApi;
    private loadAuthApi;
}