/**
 * Identity Manager
 *
 * Orchestrates user identification, property updates, and alias creation.
 * All state lives in UserManager; this layer owns validation, dedup,
 * event capture, and lifecycle events.
 */
import type { EventPayload, IdentityUpdate } from "../types";
/**
 * Minimal interface for the VTilt host.
 * Avoids circular dependency while giving IdentityManager access to
 * capture, user state reads, batched writes, session reset, and events.
 */
export interface IdentityHost {
    capture(name: string, payload: EventPayload): void;
    userManager: {
        getDistinctId(): string | null;
        getAnonymousId(): string;
        getDeviceId(): string;
        getUserState(): "anonymous" | "identified";
        getUserIdentity(): Record<string, any>;
        getUserProperties(): Record<string, any>;
        applyUpdate(update: IdentityUpdate): void;
        reset(resetDeviceId?: boolean): void;
    };
    sessionManager: {
        resetSessionId(): void;
    };
    _emitter?: {
        emit(event: string, payload?: unknown): void;
    };
}
export declare class IdentityManager {
    private _host;
    private _lastIdentifyHash;
    private _lastSetPropertiesHash;
    constructor(host: IdentityHost);
    /**
     * Identify a user.
     *
     * - Anonymous → identified: sends $identify (merge), persists after capture.
     * - Already identified, different user: sends $identify (re-identify).
     * - Same user, new properties only: delegates to setUserProperties.
     * - Identical consecutive calls are deduplicated (React re-render safety).
     */
    identify(newDistinctId?: string, userPropertiesToSet?: Record<string, any>, userPropertiesToSetOnce?: Record<string, any>): void;
    /**
     * Set user properties without changing identity.
     * Dedup mirrors identify: identical consecutive calls are skipped.
     */
    setUserProperties(userPropertiesToSet?: Record<string, any>, userPropertiesToSetOnce?: Record<string, any>): void;
    /**
     * Reset identity (logout).
     * Clears user data, generates new anonymous ID, resets session.
     */
    resetUser(resetDeviceId?: boolean): void;
    /**
     * Create an alias linking two distinct IDs.
     * If alias matches current identity, falls back to identify().
     */
    alias(alias: string, original?: string): void;
    getUserIdentity(): Record<string, any>;
    getDeviceId(): string;
    getUserState(): "anonymous" | "identified";
    getDistinctId(): string;
    getAnonymousId(): string;
}