import CacheManager, { type CacheEntry, type DownloadOptions } from './cache-manager';
import { type WllamaLogger } from './wllama';
/**
 * Callback function to track download progress
 */
export type DownloadProgressCallback = (opts: {
    /**
     * Number of bytes loaded (sum of all shards)
     */
    loaded: number;
    /**
     * Total number of bytes (sum of all shards)
     */
    total: number;
}) => any;
/**
 * Status of the model validation
 */
export declare enum ModelValidationStatus {
    VALID = "valid",
    INVALID = "invalid",
    DELETED = "deleted"
}
/**
 * Parameters for ModelManager constructor
 */
export interface ModelManagerParams {
    cacheManager?: CacheManager;
    logger?: WllamaLogger;
    /**
     * Number of parallel downloads
     *
     * Default: 3
     */
    parallelDownloads?: number | undefined;
    /**
     * Allow offline mode
     *
     * Default: false
     */
    allowOffline?: boolean | undefined;
}
/**
 * Model class
 *
 * One model can have multiple shards, each shard is a GGUF file.
 */
export declare class Model {
    private modelManager;
    constructor(modelManager: ModelManager, url: string, savedFiles?: CacheEntry[]);
    /**
     * URL to the GGUF file (in case it contains multiple shards, the URL should point to the first shard)
     *
     * This URL will be used to identify the model in the cache. There can't be 2 models with the same URL.
     */
    url: string;
    /**
     * Size in bytes (total size of all shards).
     *
     * A value of -1 means the model is deleted from the cache. You must call `ModelManager.downloadModel` to re-download the model.
     */
    size: number;
    /**
     * List of all shards in the cache, sorted by original URL (ascending order)
     */
    files: CacheEntry[];
    /**
     * Open and get a list of all shards as Blobs
     */
    open(): Promise<Blob[]>;
    /**
     * Validate the model files.
     *
     * If the model is invalid, the model manager will not be able to use it. You must call `refresh` to re-download the model.
     *
     * Cases that model is invalid:
     * - The model is deleted from the cache
     * - The model files are missing (or the download is interrupted)
     */
    validate(): ModelValidationStatus;
    /**
     * In case the model is invalid, call this function to re-download the model
     */
    refresh(options?: DownloadOptions): Promise<void>;
    /**
     * Remove the model from the cache
     */
    remove(): Promise<void>;
    private getAllFiles;
    private getTotalDownloadSize;
}
export declare class ModelManager {
    cacheManager: CacheManager;
    params: ModelManagerParams;
    logger: WllamaLogger;
    constructor(params?: ModelManagerParams);
    /**
     * Parses a model URL and returns an array of URLs based on the following patterns:
     * - If the input URL is an array, it returns the array itself.
     * - If the input URL is a string in the `gguf-split` format, it returns an array containing the URL of each shard in ascending order.
     * - Otherwise, it returns an array containing the input URL as a single element array.
     * @param modelUrl URL or list of URLs
     */
    static parseModelUrl(modelUrl: string | string[]): string[];
    /**
     * Get all models in the cache
     */
    getModels(opts?: {
        includeInvalid?: boolean;
    }): Promise<Model[]>;
    /**
     * Download a model from the given URL.
     *
     * The URL must end with `.gguf`
     */
    downloadModel(url: string, options?: DownloadOptions): Promise<Model>;
    /**
     * Get a model from the cache or download it if it's not available.
     */
    getModelOrDownload(url: string, options?: DownloadOptions): Promise<Model>;
    /**
     * Remove all models from the cache
     */
    clear(): Promise<void>;
}