/**
 * Asset API - WebSocket-based asset serving
 *
 * Handles asset requests from the Connect web UI:
 * - asset.list - List all assets
 * - asset.get - Get asset bytes (streamed)
 * - asset.preview - Get preview metadata + thumbnail
 * - asset.group - Get assets by group
 * - view.get - Get ViewSpec
 */
import { AssetManifest, AssetPreview, ViewSpec, ClientAssetManifest } from './assets.js';
export interface AssetRequest {
    type: 'asset.list' | 'asset.get' | 'asset.preview' | 'asset.group' | 'view.get' | 'view.list';
    requestId: string;
    assetId?: string;
    groupId?: string;
    viewId?: string;
}
export interface AssetListResponse {
    type: 'asset.list';
    requestId: string;
    assets: ClientAssetManifest[];
}
export interface AssetGetResponse {
    type: 'asset.get';
    requestId: string;
    assetId: string;
    data: string;
    mime: string;
    size: number;
}
export interface AssetPreviewResponse {
    type: 'asset.preview';
    requestId: string;
    assetId: string;
    manifest: ClientAssetManifest;
    preview: AssetPreview | null;
}
export interface AssetGroupResponse {
    type: 'asset.group';
    requestId: string;
    groupId: string;
    assets: ClientAssetManifest[];
    previews: (AssetPreview | null)[];
}
export interface ViewGetResponse {
    type: 'view.get';
    requestId: string;
    view: ViewSpec | null;
}
export interface ViewListResponse {
    type: 'view.list';
    requestId: string;
    views: ViewSpec[];
}
export interface AssetErrorResponse {
    type: 'asset.error';
    requestId: string;
    error: string;
}
export type AssetResponse = AssetListResponse | AssetGetResponse | AssetPreviewResponse | AssetGroupResponse | ViewGetResponse | ViewListResponse | AssetErrorResponse;
export declare function registerView(view: ViewSpec): void;
export declare function getView(viewId: string): ViewSpec | undefined;
export declare function getAllViews(): ViewSpec[];
/**
 * Handle asset request from WebSocket
 */
export declare function handleAssetRequest(request: AssetRequest): Promise<AssetResponse>;
/**
 * Build gallery state for WebSocket broadcast
 * This replaces the old extractFilesFromOutput approach
 */
export interface GalleryState {
    assets: AssetManifest[];
    previews: Map<string, AssetPreview>;
    groups: Map<string, AssetManifest[]>;
    views: ViewSpec[];
}
export declare function buildGalleryState(): GalleryState;
/**
 * Convert gallery state to WebSocket message format
 * Strips absolute paths from assets for client safety
 */
export declare function galleryStateToMessage(state: GalleryState): {
    type: 'gallery_state';
    assets: ClientAssetManifest[];
    previews: {
        [key: string]: AssetPreview;
    };
    groups: {
        [key: string]: string[];
    };
    views: ViewSpec[];
};