import { URI } from "../../grammar/uri.js";
import { Body } from "../messages/body.js";
import { OutgoingByeRequest } from "../messages/methods/bye.js";
import { OutgoingInfoRequest } from "../messages/methods/info.js";
import { OutgoingInviteRequest, OutgoingInviteRequestDelegate } from "../messages/methods/invite.js";
import { OutgoingMessageRequest } from "../messages/methods/message.js";
import { OutgoingNotifyRequest } from "../messages/methods/notify.js";
import { OutgoingPrackRequest } from "../messages/methods/prack.js";
import { OutgoingReferRequest } from "../messages/methods/refer.js";
import { OutgoingRequestDelegate, RequestOptions } from "../messages/outgoing-request.js";
import { SessionDelegate } from "./session-delegate.js";
/**
 * Session.
 * @remarks
 * https://tools.ietf.org/html/rfc3261#section-13
 * @public
 */
export interface Session {
    /** Session delegate. */
    delegate: SessionDelegate | undefined;
    /** The session id. Equal to callId + localTag + remoteTag. */
    readonly id: string;
    /** Call Id. */
    readonly callId: string;
    /** Local Tag. */
    readonly localTag: string;
    /** Local URI. */
    readonly localURI: URI;
    /** Remote Tag. */
    readonly remoteTag: string;
    /** Remote Target. */
    readonly remoteTarget: URI;
    /** Remote URI. */
    readonly remoteURI: URI;
    /** Session state. */
    readonly sessionState: SessionState;
    /** Current state of the offer/answer exchange. */
    readonly signalingState: SignalingState;
    /** The current answer if signalingState is stable. Otherwise undefined. */
    readonly answer: Body | undefined;
    /** The current offer if signalingState is not initial or closed. Otherwise undefined. */
    readonly offer: Body | undefined;
    /**
     * Destroy session.
     */
    dispose(): void;
    /**
     * Send a BYE request.
     * Terminating a session.
     * https://tools.ietf.org/html/rfc3261#section-15
     * @param delegate - Request delegate.
     * @param options - Options bucket.
     */
    bye(delegate?: OutgoingRequestDelegate, options?: RequestOptions): OutgoingByeRequest;
    /**
     * Send an INFO request.
     * Exchange information during a session.
     * https://tools.ietf.org/html/rfc6086#section-4.2.1
     * @param delegate - Request delegate.
     * @param options - Options bucket.
     */
    info(delegate?: OutgoingRequestDelegate, options?: RequestOptions): OutgoingInfoRequest;
    /**
     * Send re-INVITE request.
     * Modifying a session.
     * https://tools.ietf.org/html/rfc3261#section-14.1
     * @param delegate - Request delegate.
     * @param options - Options bucket.
     */
    invite(delegate?: OutgoingInviteRequestDelegate, options?: RequestOptions): OutgoingInviteRequest;
    /**
     * Send MESSAGE request.
     * Deliver a message during a session.
     * https://tools.ietf.org/html/rfc3428#section-4
     * @param delegate - Request delegate.
     * @param options - Options bucket.
     */
    message(delegate?: OutgoingRequestDelegate, options?: RequestOptions): OutgoingMessageRequest;
    /**
     * Send NOTIFY request.
     * Inform referrer of transfer progress.
     * The use of this is limited to the implicit creation of subscription by REFER (historical).
     * Otherwise, notifiers MUST NOT create subscriptions except upon receipt of a SUBSCRIBE request.
     * https://tools.ietf.org/html/rfc3515#section-3.7
     * @param delegate - Request delegate.
     * @param options - Options bucket.
     */
    notify(delegate?: OutgoingRequestDelegate, options?: RequestOptions): OutgoingNotifyRequest;
    /**
     * Send PRACK request.
     * Acknowledge a reliable provisional response.
     * https://tools.ietf.org/html/rfc3262#section-4
     * @param delegate - Request delegate.
     * @param options - Options bucket.
     */
    prack(delegate?: OutgoingRequestDelegate, options?: RequestOptions): OutgoingPrackRequest;
    /**
     * Send REFER request.
     * Transfer a session.
     * https://tools.ietf.org/html/rfc3515#section-2.4.1
     * @param delegate - Request delegate.
     * @param options - Options bucket.
     */
    refer(delegate?: OutgoingRequestDelegate, options?: RequestOptions): OutgoingReferRequest;
}
/**
 * Session state.
 * @remarks
 * https://tools.ietf.org/html/rfc3261#section-13
 * @public
 */
export declare enum SessionState {
    Initial = "Initial",
    Early = "Early",
    AckWait = "AckWait",
    Confirmed = "Confirmed",
    Terminated = "Terminated"
}
/**
 * Offer/Answer state.
 * @remarks
 * ```txt
 *         Offer                Answer             RFC    Ini Est Early
 *  -------------------------------------------------------------------
 *  1. INVITE Req.          2xx INVITE Resp.     RFC 3261  Y   Y    N
 *  2. 2xx INVITE Resp.     ACK Req.             RFC 3261  Y   Y    N
 *  3. INVITE Req.          1xx-rel INVITE Resp. RFC 3262  Y   Y    N
 *  4. 1xx-rel INVITE Resp. PRACK Req.           RFC 3262  Y   Y    N
 *  5. PRACK Req.           200 PRACK Resp.      RFC 3262  N   Y    Y
 *  6. UPDATE Req.          2xx UPDATE Resp.     RFC 3311  N   Y    Y
 *
 *       Table 1: Summary of SIP Usage of the Offer/Answer Model
 * ```
 * https://tools.ietf.org/html/rfc6337#section-2.2
 * @public
 */
export declare enum SignalingState {
    Initial = "Initial",
    HaveLocalOffer = "HaveLocalOffer",
    HaveRemoteOffer = "HaveRemoteOffer",
    Stable = "Stable",
    Closed = "Closed"
}