import type { ChatMessage } from '../../types/ChatMessage';
import type { ChatParticipant } from '../../types/ChatParticipant';
import type { ParsedCitation } from '../../utils/parseCitationsFromContent';
/**
 * Minimal participant visuals needed by chat exports.
 *
 * @private internal utility of chat save format definitions
 */
export type ChatExportParticipantVisuals = {
    readonly displayName: string;
    readonly accentColor: string;
};
/**
 * One numbered source collected from rendered chat message citations.
 *
 * @private internal utility of chat save format definitions
 */
export type ChatExportCitationFootnote = {
    readonly number: number;
    readonly citation: ParsedCitation;
};
/**
 * Document-wide citation footnotes collected while rendering chat exports.
 *
 * @private internal utility of chat save format definitions
 */
export type ChatExportCitationFootnoteRegistry = {
    readonly footnotes: Array<ChatExportCitationFootnote>;
    readonly footnoteBySourceKey: Map<string, ChatExportCitationFootnote>;
};
/**
 * Render-ready chat message citation payload using document-wide footnote numbers.
 *
 * @private internal utility of chat save format definitions
 */
export type ChatExportCitationRenderModel = {
    readonly content: ChatMessage['content'];
    readonly footnotes: ReadonlyArray<ChatExportCitationFootnote>;
};
/**
 * Formats exported timestamps into a compact human-readable label.
 *
 * @private internal utility of chat save format definitions
 */
export declare function formatChatExportTimestamp(value?: string | Date): string;
/**
 * Builds a participant lookup indexed by both raw and upper-cased names.
 *
 * @private internal utility of chat save format definitions
 */
export declare function buildChatExportParticipantMap(participants: ReadonlyArray<ChatParticipant>): ReadonlyMap<string, ChatParticipant>;
/**
 * Resolves the display label and accent color for one message sender.
 *
 * @private internal utility of chat save format definitions
 */
export declare function resolveChatExportParticipantVisuals(participants: ReadonlyMap<string, ChatParticipant>, sender: string): ChatExportParticipantVisuals;
/**
 * Creates an empty document-wide citation footnote registry.
 *
 * @private internal utility of chat save format definitions
 */
export declare function createChatExportCitationFootnoteRegistry(): ChatExportCitationFootnoteRegistry;
/**
 * Converts one message to markdown content with document-wide numbered citation references.
 *
 * @private internal utility of chat save format definitions
 */
export declare function createChatExportCitationRenderModel(citationFootnotes: ChatExportCitationFootnoteRegistry, message: Pick<ChatMessage, 'content' | 'citations'>): ChatExportCitationRenderModel;
/**
 * Creates a readable source label for one citation footnote.
 *
 * @private internal utility of chat save format definitions
 */
export declare function formatChatExportCitationFootnoteLabel(footnote: ChatExportCitationFootnote, href?: string): string;