import type { ChatParticipant } from '../types/ChatParticipant';
import type { ParsedCitation } from './parseCitationsFromContent';
/**
 * Returns whether the provided value is a valid HTTP(S) URL.
 *
 * @param value - Candidate string to inspect.
 * @returns True when the value parses as an HTTP or HTTPS URL.
 *
 * @private utility of `<Chat/>` citation rendering
 */
export declare function isCitationUrl(value: string): boolean;
/**
 * Determines whether a citation should be displayed as a text snippet instead of a file/URL.
 *
 * @param citation - Parsed citation metadata.
 * @returns True when the citation looks like inline text instead of a document or URL.
 *
 * @private utility of `<Chat/>` citation rendering
 */
export declare function isPlainTextCitation(citation: ParsedCitation): boolean;
/**
 * Builds a label that matches the desired chip/modal title for a citation.
 *
 * @param citation - Parsed citation metadata.
 * @returns The friendly label shown on chips and modal headers.
 *
 * @private utility of `<Chat/>` citation rendering
 */
export declare function getCitationLabel(citation: ParsedCitation): string;
/**
 * Resolves the preview URL used inside the citation modal iframe.
 *
 * @param citation - Parsed citation metadata.
 * @param participants - Known chat participants for agent knowledge lookup.
 * @returns URL string suitable for iframe preview or null when unavailable.
 *
 * @private utility of `<Chat/>` citation rendering
 */
export declare function resolveCitationPreviewUrl(citation: ParsedCitation, participants: ReadonlyArray<ChatParticipant>): string | null;
/**
 * Creates a readable fallback label from a citation source when no title metadata is available.
 *
 * @param source - Raw citation source value.
 * @returns Human-friendly source label.
 *
 * @private utility of `<Chat/>` citation rendering
 */
export declare function createReadableCitationSourceLabel(source: string): string;