import type { Asset, AssetDecoder, AssetDecoderLease, AssetKind, AssetLoadError, BuiltinAssetKind, BuiltinAssetPayload, PluginAssetDefinition, Result } from '@forgeax/engine-types';
import type { CatalogSource } from '../catalog-source.js';
import { type AssetGraphSnapshot } from './asset-graph.js';
import { type CatalogSessionOptions } from './catalog-session.js';
export interface AssetRegistryOptions extends CatalogSessionOptions {
    readonly catalog: CatalogSource;
    readonly fetcher?: typeof globalThis.fetch;
    readonly maxConcurrentReads?: number;
}
export interface AssetLoadOptions {
    readonly signal?: AbortSignal;
}
export type AssetRegistrySnapshot = AssetGraphSnapshot;
export interface AssetRegistry {
    readPluginDefinition(guid: string): Promise<Result<PluginAssetDefinition, AssetLoadError>>;
    installDecoder<P, K extends string>(kind: AssetKind<P, K>, decoder: AssetDecoder<P>): AssetDecoderLease;
    load<K extends BuiltinAssetKind>(guid: string, kind: K, options?: AssetLoadOptions): Promise<Result<BuiltinAssetPayload<K>, AssetLoadError>>;
    load<P, K extends string>(guid: string, kind: AssetKind<P, K>, options?: AssetLoadOptions): Promise<Result<P, AssetLoadError>>;
    snapshot(): AssetRegistrySnapshot;
    subscribe(listener: (snapshot: AssetRegistrySnapshot) => void): () => void;
    dispose(): void;
}
/** Internal render projection; the root Registry keeps only its five actions. */
export interface AssetRegistryResolver {
    readonly epoch: number;
    lookup<T extends Asset>(guid: string): T | undefined;
    guidOf(asset: Asset): string | undefined;
}
export declare function getAssetRegistryResolver(registry: AssetRegistry): AssetRegistryResolver;
export declare function createAssetRegistry(options: AssetRegistryOptions): AssetRegistry;
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