import type { EventHandler, Logger, Unsubscribe } from './types';
/** Configuration for `ws.push(event, config)`. */
export interface PushConfig<T = unknown> {
    /** Custom render function — you decide how to display. */
    render?: (data: T) => void;
    /** Title for browser Notification API. */
    title?: string | ((data: T) => string);
    /** Body for browser Notification API. */
    body?: string | ((data: T) => string);
    /** Icon URL for browser Notification. */
    icon?: string;
    /** Tag for browser Notification deduplication. */
    tag?: string | ((data: T) => string);
    /**
     * Which tab(s) show the notification:
     * - `'active'` — only the visible/focused tab (default for render)
     * - `'leader'` — only the leader tab (default for browser Notification)
     * - `'all'` — every tab (critical alerts)
     */
    target?: 'active' | 'leader' | 'all';
    /** Called when browser Notification is clicked. */
    onClick?: (data: T) => void;
}
/** What PushManager needs from its owner. */
export interface PushManagerDeps {
    /** Subscribe to an event (SharedWebSocket.on). */
    on: (event: string, handler: EventHandler) => Unsubscribe;
    isLeader: () => boolean;
    isActive: () => boolean;
    log: Logger;
}
/**
 * Routes incoming events to UI notifications — custom render and/or the browser
 * Notification API — with `target` deciding which tab(s) display them. Extracted
 * from SharedWebSocket so the render-vs-native dispatch lives in one unit.
 */
export declare class PushManager {
    private readonly deps;
    constructor(deps: PushManagerDeps);
    push<T = unknown>(event: string, config: PushConfig<T>): Unsubscribe;
}