import { AuthenticationProvider } from '@microsoft/microsoft-graph-client/lib/es/IAuthenticationProvider';
import { AuthenticationProviderOptions } from '@microsoft/microsoft-graph-client/lib/es/IAuthenticationProviderOptions';
import { Graph } from '../Graph';
export declare abstract class IProvider implements AuthenticationProvider {
    private _state;
    private _loginChangedDispatcher;
    readonly state: ProviderState;
    setState(state: ProviderState): void;
    onStateChanged(eventHandler: EventHandler<LoginChangedEvent>): void;
    removeStateChangedHandler(eventHandler: EventHandler<LoginChangedEvent>): void;
    constructor();
    login?(): Promise<void>;
    logout?(): Promise<void>;
    getAccessTokenForScopes(...scopes: string[]): Promise<string>;
    abstract getAccessToken(options?: AuthenticationProviderOptions): Promise<string>;
    graph: Graph;
}
export declare type EventHandler<E> = (event: E) => void;
export interface LoginChangedEvent {
}
export declare class EventDispatcher<E> {
    private eventHandlers;
    fire(event: E): void;
    add(eventHandler: EventHandler<E>): void;
    remove(eventHandler: EventHandler<E>): void;
}
export declare enum LoginType {
    Popup = 0,
    Redirect = 1
}
export declare enum ProviderState {
    Loading = 0,
    SignedOut = 1,
    SignedIn = 2
}