import { type UIEvent } from 'react';
/**
 * Configuration for the auto-scroll behavior.
 *
 * @public exported from `@promptbook/components`
 */
export type ChatAutoScrollConfig = {
    /**
     * Threshold in pixels from bottom to consider as "at bottom"
     * @default 100
     */
    bottomThreshold?: number;
    /**
     * Whether to use smooth scrolling
     * @default true
     */
    smoothScroll?: boolean;
    /**
     * Delay before checking scroll position after new messages (in milliseconds)
     * @default 100
     */
    scrollCheckDelay?: number;
};
/**
 * Hook for managing auto-scroll behavior in chat components
 *
 * This hook provides:
 * - Automatic scrolling to bottom when new messages arrive (if user is already at bottom)
 * - Detection of when user scrolls away from bottom
 * - Scroll-to-bottom functionality with smooth animation
 * - Mobile-optimized scrolling behavior
 *
 * @public exported from `@promptbook/components`
 */
export declare function useChatAutoScroll(config?: ChatAutoScrollConfig): {
    isAutoScrolling: boolean;
    chatMessagesRef: (element: HTMLDivElement | null) => void;
    handleScroll: (event: UIEvent<HTMLDivElement, globalThis.UIEvent>) => void;
    handleMessagesChange: (isStreaming?: boolean | undefined) => void;
    scrollToBottom: () => void;
    enableAutoScroll: () => void;
    disableAutoScroll: () => void;
    isMobile: boolean;
};