/**
 * Resource Fetcher for Expo applications (legacy `expo-file-system` API).
 *
 * This module provides functions to download and manage files stored in the application's document directory
 * inside the `react-native-executorch/` directory. These utilities help manage storage and clean up downloaded
 * files when they are no longer needed.
 *
 * It is functionally equivalent to the default `ExpoResourceFetcher` export, but uses the legacy
 * `expo-file-system/legacy` APIs under the hood. Prefer this build only if you cannot adopt the new
 * file-system API yet.
 * @deprecated This is a frozen code path that will be deprecated in the next major release.
 * We recommend migrating to the non-legacy imports.
 * @category Utilities - General
 * @remarks
 * **Key Functionality:**
 * - **Download Control**: Pause, resume, and cancel operations through:
 *   - {@link pauseFetching} - Pause ongoing downloads
 *   - {@link resumeFetching} - Resume paused downloads
 *   - {@link cancelFetching} - Cancel ongoing or paused downloads
 * - **File Management**:
 *   - {@link getFilesTotalSize} - Get total size of resources
 *   - {@link listDownloadedFiles} - List all downloaded files
 *   - {@link listDownloadedModels} - List downloaded model files (.pte)
 *   - {@link deleteResources} - Delete downloaded resources
 *
 * **Important Notes:**
 * - Pause/resume/cancel operations work only for remote resources
 * - Most functions accept multiple `ResourceSource` arguments (string, number, or object)
 * - The {@link fetch} method accepts a progress callback (0-1) and returns file paths or throws if interrupted
 */
import { ResourceSource, BaseResourceFetcherClass } from 'react-native-executorch/legacy';
import { type ActiveDownload } from './handlers';
declare class ExpoResourceFetcherClass extends BaseResourceFetcherClass<ActiveDownload> {
    protected downloads: Map<ResourceSource, ActiveDownload>;
    protected getFilesSizes(sources: ResourceSource[]): Promise<{
        results: {
            source: ResourceSource;
            type: import("react-native-executorch/legacy").SourceType;
            length: number;
            previousFilesTotalLength: number;
        }[];
        totalLength: number;
    }>;
    protected handleObject(source: object): Promise<string>;
    protected handleLocalFile(source: string): string;
    protected handleAsset(source: number, progressCallback: (progress: number) => void): Promise<string>;
    protected handleRemote(uri: string, source: ResourceSource, progressCallback: (progress: number) => void): Promise<{
        path: string;
        wasDownloaded: boolean;
    }>;
    protected pause(source: ResourceSource): Promise<void>;
    protected resume(source: ResourceSource): Promise<void>;
    protected cancel(source: ResourceSource): Promise<void>;
    /**
     * Reads the contents of a file as a string.
     * @param path - Absolute file path or file URI to read.
     * @returns A promise that resolves to the file contents as a string.
     */
    readAsString(path: string): Promise<string>;
    /**
     * Lists all the downloaded files used by React Native ExecuTorch.
     * @returns A promise that resolves to an array of URIs for all the downloaded files.
     */
    listDownloadedFiles(): Promise<string[]>;
    /**
     * Deletes downloaded resources from the local filesystem.
     * @param sources - The resource identifiers used when calling `fetch`.
     * @returns A promise that resolves once all specified resources have been removed.
     */
    deleteResources(...sources: ResourceSource[]): Promise<void>;
    /**
     * Fetches the total size of remote files. Works only for remote files.
     * @param sources - The resource identifiers (URLs).
     * @returns A promise that resolves to the combined size of files in bytes.
     */
    getFilesTotalSize(...sources: ResourceSource[]): Promise<number>;
}
/**
 * @deprecated This is a frozen code path that will be deprecated in the next major release.
 * We recommend migrating to the non-legacy imports.
 */
export declare const ExpoResourceFetcher: ExpoResourceFetcherClass;
export {};
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