import { CSSResultArray, TemplateResult } from 'lit';
import { LuzmoElement } from '../../utils/base';
import type { ChatMessageAvatarPlacement } from '../chat-message/chat-message';
declare const LuzmoChatMessageGroup_base: typeof LuzmoElement & {
    new (...args: any[]): import("../..").SizedElementInterface;
    prototype: import("../..").SizedElementInterface;
};
/**
 * A chat message group component for displaying consecutive messages from the same user.
 *
 * When multiple messages are grouped together, only the first or last message
 * will display the name/date metadata and avatar, reducing visual clutter.
 *
 * @element luzmo-chat-message-group
 * @slot - the luzmo-chat-message elements that make up the group
 * @slot avatar - Optional avatar slot at the group level. If provided, this avatar will be used.
 * If not provided, the first message's avatar will be reused.
 */
export declare class LuzmoChatMessageGroup extends LuzmoChatMessageGroup_base {
    static get styles(): CSSResultArray;
    /**
     * The vertical placement of the avatar relative to the message group.
     * - `top`: Avatar appears next to the first message
     * - `middle`: Avatar appears centered relative to the group
     * - `bottom`: Avatar appears next to the last message (default)
     * @attr avatar-placement
     */
    avatarPlacement: ChatMessageAvatarPlacement;
    private _messages;
    private _hasGroupAvatar;
    /**
     * Handles group-level avatar slot changes.
     */
    private _handleGroupAvatarSlotChange;
    /**
     * Configures child chat messages.
     * - Distributes size to all messages
     * - Controls which message shows the avatar (from group slot or first message)
     * - Controls which message shows the metadata (name/datetime)
     * - Ensures consistent spacing for all messages
     */
    private configureMessages;
    /**
     * Handles message slot changes.
     */
    protected handleSlotchange(): void;
    protected updated(changedProperties: Map<string, unknown>): void;
    protected render(): TemplateResult;
}
export {};