import PrefetchOn from './PrefetchOn';
import PrefetchSortBy from './PrefetchSortBy';
/**
 * [[MessagingSessionConfiguration]] contains the information necessary to start
 * a messaging session.
 */
export default class MessagingSessionConfiguration {
    userArn: string;
    messagingSessionId: string | null;
    endpointUrl: string | undefined;
    chimeClient: any;
    /**
     * Maximum amount of time in milliseconds to allow for reconnecting.
     */
    reconnectTimeoutMs: number;
    /**
     * Fixed wait amount in milliseconds between reconnecting attempts.
     */
    reconnectFixedWaitMs: number;
    /**
     * The short back off time in milliseconds between reconnecting attempts.
     */
    reconnectShortBackoffMs: number;
    /**
     * The long back off time in milliseconds between reconnecting attempts.
     */
    reconnectLongBackoffMs: number;
    /**
     * The enum to indicate if we want to turn on prefetch feature. Prefetch feature will send out CHANNEL_DETAILS event
     * upon websocket connection, which includes information about channel, channel messages, channel memberships etc.
     */
    prefetchOn: PrefetchOn | undefined;
    /**
     * The enum to indicate the sorting mechanism to use when deciding which channels to Prefetch. Prefetch feature will send out
     * CHANNEL_DETAILS event upon websocket connection, which includes information about channel, channel messages, channel memberships etc.
     * The first 50 channels matching the PrefetchSortBy will be sent.  If not set, channels will be returned first by those
     * with unread messages and then those with the latest last sent message timestamp.
     */
    prefetchSortBy: PrefetchSortBy | undefined;
    /**
     * Constructs a MessagingSessionConfiguration optionally with userArn, messaging session id, a messaging session
     * endpoint URL, and the chimeClient.
     *
     * endpointUrl is deprecated and should not be used. Internally it is resolved on connect via chimeClient if undefined, and
     * always re-resolved on reconnect.
     *
     * The messaging session id is to uniquely identify this messaging session for the userArn.
     * If messaging session id is passed in as null, it will be automatically generated.
     */
    constructor(userArn: string, messagingSessionId: string | null, endpointUrl: string | undefined, chimeClient: any);
    private generateSessionId;
}