/**
 * The webR JavaScript API.
 * @module WebR
 */
import { ChannelMain } from './chan/channel';
import { ChannelType } from './chan/channel-common';
import { Message } from './chan/message';
import { EmPtr } from './emscripten';
import { newRClassProxy } from './proxy';
import { RCharacter, RComplex, RDouble } from './robj-main';
import { REnvironment, RSymbol, RInteger } from './robj-main';
import { RList, RLogical, RNull, RObject, RPairlist, RRaw, RString, RCall } from './robj-main';
import * as RWorker from './robj-worker';
import { EvalROptions } from './webr-chan';
export { Console, ConsoleCallbacks } from './console';
export * from './robj-main';
export * from './error';
/**
 * The webR FS API for interacting with the Emscripten Virtual File System.
 */
export interface WebRFS {
    /**
     * Lookup information about a file or directory node in the Emscripten
     * virtual file system.
     * @param {string} path Path to the requested node.
     * @returns {Promise<FSNode>} The requested node.
     */
    lookupPath: (path: string) => Promise<FSNode>;
    /**
     * Create a directory on the Emscripten virtual file system.
     * @param {string} path Path of the directory to create.
     * @returns {Promise<FSNode>} The newly created directory node.
     */
    mkdir: (path: string) => Promise<FSNode>;
    /**
     * Get the content of a file on the Emscripten virtual file system.
     * @param {string} path Path of the file to read.
     * @param {string} [flags] Open the file with the specified flags.
     * @returns {Promise<Uint8Array>} The content of the requested file.
     */
    readFile: (path: string, flags?: string) => Promise<Uint8Array>;
    /**
     * Remove a directory on the Emscripten virtual file system.
     * @param {string} path Path of the directory to remove.
     */
    rmdir: (path: string) => Promise<void>;
    /**
     * Write a new file to the Emscripten virtual file system.
     * @param {string} path Path of the new file.
     * @param {Uint8Array} data The content of the new file.
     * @param {string} [flags] Open the file with the specified flags.
     */
    writeFile: (path: string, data: ArrayBufferView, flags?: string) => Promise<void>;
    /**
     * Unlink a node on the Emscripten virtual file system. If that node was the
     * last link to a file it is is deleted.
     * @param {string} path Path of the target node.
     */
    unlink: (path: string) => Promise<void>;
}
/** A filesystem entry in the Emscripten Virtual File System */
export type FSNode = {
    id: number;
    name: string;
    mode: number;
    isFolder: boolean;
    contents: {
        [key: string]: FSNode;
    };
};
/**
 * The configuration settings to be used when starting webR.
 */
export interface WebROptions {
    /**
     * Command line arguments to be passed to R.
     * Default: `[]`.
     */
    RArgs?: string[];
    /**
     * Environment variables to be made available for the R process.
     * Default: `{ R_HOME: '/usr/lib/R', R_ENABLE_JIT: 0 }`.
     */
    REnv?: {
        [key: string]: string;
    };
    /**
     * The base URL used for downloading R WebAssembly binaries.
     *  Default: `'https://webr.r-wasm.org/[version]/'`
     */
    baseUrl?: string;
    /**
     * The repo URL to use when downloading R WebAssembly packages.
     * Default: `'https://repo.r-wasm.org/`
     */
    repoUrl?: string;
    /**
     * The base URL from where to load JavaScript worker scripts when loading
     * webR with the ServiceWorker communication channel mode.
     * Default: `''`
     */
    serviceWorkerUrl?: string;
    /**
     * The WebAssembly user's home directory and initial working directory.
     * Default: `'/home/web_user'`
     */
    homedir?: string;
    /**
     * Start R in interactive mode?
     * Default: `true`.
     */
    interactive?: boolean;
    /**
     * Set the communication channel type to be used.
     * Default: `channelType.Automatic`
     */
    channelType?: (typeof ChannelType)[keyof typeof ChannelType];
    /**
     * Create the lazy virtual filesystem entries before starting R?
     * Default: `true`.
     */
    createLazyFilesystem?: boolean;
}
/**
 * The webR class is used to initialize and interact with the webR system.
 *
 * Start webR by constructing an instance of the WebR class, optionally passing
 * an options argument of type {@link WebROptions}. WebR will begin to download
 * and start a version of R built for WebAssembly in a worker thread.
 */
export declare class WebR {
    #private;
    globalShelter: Shelter;
    RObject: ReturnType<typeof newRClassProxy<typeof RWorker.RObject, RObject>>;
    RLogical: ReturnType<typeof newRClassProxy<typeof RWorker.RLogical, RLogical>>;
    RInteger: ReturnType<typeof newRClassProxy<typeof RWorker.RInteger, RInteger>>;
    RDouble: ReturnType<typeof newRClassProxy<typeof RWorker.RDouble, RDouble>>;
    RCharacter: ReturnType<typeof newRClassProxy<typeof RWorker.RCharacter, RCharacter>>;
    RComplex: ReturnType<typeof newRClassProxy<typeof RWorker.RComplex, RComplex>>;
    RRaw: ReturnType<typeof newRClassProxy<typeof RWorker.RRaw, RRaw>>;
    RList: ReturnType<typeof newRClassProxy<typeof RWorker.RList, RList>>;
    RPairlist: ReturnType<typeof newRClassProxy<typeof RWorker.RPairlist, RPairlist>>;
    REnvironment: ReturnType<typeof newRClassProxy<typeof RWorker.REnvironment, REnvironment>>;
    RSymbol: ReturnType<typeof newRClassProxy<typeof RWorker.RSymbol, RSymbol>>;
    RString: ReturnType<typeof newRClassProxy<typeof RWorker.RString, RString>>;
    RCall: ReturnType<typeof newRClassProxy<typeof RWorker.RCall, RCall>>;
    objs: {
        baseEnv: REnvironment;
        globalEnv: REnvironment;
        null: RNull;
        true: RLogical;
        false: RLogical;
        na: RLogical;
    };
    Shelter: new () => Promise<Shelter>;
    constructor(options?: WebROptions);
    /**
     * @returns {Promise<void>} A promise that resolves once webR has been
     * intialised.
     */
    init(): Promise<unknown>;
    /**
     * Close the communication channel between the main thread and the worker
     * thread cleanly. Once this has been executed, webR will be unable to
     * continue.
     */
    close(): void;
    /**
     * Read from the communication channel and return an output message.
     * @returns {Promise<Message>} The output message
     */
    read(): Promise<Message>;
    /**
     * Flush the output queue in the communication channel and return all output
     * messages.
     * @returns {Promise<Message[]>} The output messages
     */
    flush(): Promise<Message[]>;
    /**
     * Send a message to the communication channel input queue.
     * @param {Message} msg Message to be added to the input queue.
     */
    write(msg: Message): void;
    /**
     * Send a line of standard input to the communication channel input queue.
     * @param {string} input Message to be added to the input queue.
     */
    writeConsole(input: string): void;
    /** Attempt to interrupt a running R computation. */
    interrupt(): void;
    /**
     * Install a list of R packages from the default webR CRAN-like repo.
     * @param {string[]} packages An array of R pacakge names.
     * @param {boolean} quiet If true, do not output downloading messages.
     */
    installPackages(packages: string[], quiet?: boolean): Promise<void>;
    /**
     * Destroy an R object reference.
     * @param {RObject} x An R object reference.
     */
    destroy(x: RObject): Promise<void>;
    /**
     * Evaluate the given R code.
     *
     * Stream outputs and any conditions raised during exectution are written to
     * the JavaScript console.
     * @param {string} code The R code to evaluate.
     * @param {EvalROptions} [options] Options for the execution environment.
     * @returns {Promise<RObject>} The result of the computation.
     */
    evalR(code: string, options?: EvalROptions): Promise<RObject>;
    evalRVoid(code: string, options?: EvalROptions): Promise<void>;
    evalRBoolean(code: string, options?: EvalROptions): Promise<boolean>;
    evalRNumber(code: string, options?: EvalROptions): Promise<number>;
    evalRString(code: string, options?: EvalROptions): Promise<string>;
    /**
     * Evaluate the given R code, returning the result as a raw JavaScript object.
     * @param {string} code The R code to evaluate.
     * @param {EvalRMessageOutputType} outputType JavaScript type to return the result as.
     * @param {EvalROptions} [options] Options for the execution environment.
     * @returns {Promise<unknown>} The result of the computation.
     */
    evalRRaw(code: string, outputType: 'void', options?: EvalROptions): Promise<void>;
    evalRRaw(code: string, outputType: 'boolean', options?: EvalROptions): Promise<boolean>;
    evalRRaw(code: string, outputType: 'boolean[]', options?: EvalROptions): Promise<boolean[]>;
    evalRRaw(code: string, outputType: 'number', options?: EvalROptions): Promise<number>;
    evalRRaw(code: string, outputType: 'number[]', options?: EvalROptions): Promise<number[]>;
    evalRRaw(code: string, outputType: 'string', options?: EvalROptions): Promise<string>;
    evalRRaw(code: string, outputType: 'string[]', options?: EvalROptions): Promise<string[]>;
    invokeWasmFunction(ptr: EmPtr, ...args: number[]): Promise<EmPtr>;
    FS: {
        lookupPath: (path: string) => Promise<FSNode>;
        mkdir: (path: string) => Promise<FSNode>;
        readFile: (path: string, flags?: string) => Promise<Uint8Array>;
        rmdir: (path: string) => Promise<void>;
        writeFile: (path: string, data: ArrayBufferView, flags?: string) => Promise<void>;
        unlink: (path: string) => Promise<void>;
    };
}
/** WebR shelters provide fine-grained control over the lifetime of R objects. */
export declare class Shelter {
    #private;
    RObject: ReturnType<typeof newRClassProxy<typeof RWorker.RObject, RObject>>;
    RLogical: ReturnType<typeof newRClassProxy<typeof RWorker.RLogical, RLogical>>;
    RInteger: ReturnType<typeof newRClassProxy<typeof RWorker.RInteger, RInteger>>;
    RDouble: ReturnType<typeof newRClassProxy<typeof RWorker.RDouble, RDouble>>;
    RCharacter: ReturnType<typeof newRClassProxy<typeof RWorker.RCharacter, RCharacter>>;
    RComplex: ReturnType<typeof newRClassProxy<typeof RWorker.RComplex, RComplex>>;
    RRaw: ReturnType<typeof newRClassProxy<typeof RWorker.RRaw, RRaw>>;
    RList: ReturnType<typeof newRClassProxy<typeof RWorker.RList, RList>>;
    RPairlist: ReturnType<typeof newRClassProxy<typeof RWorker.RPairlist, RPairlist>>;
    REnvironment: ReturnType<typeof newRClassProxy<typeof RWorker.REnvironment, REnvironment>>;
    RSymbol: ReturnType<typeof newRClassProxy<typeof RWorker.RSymbol, RSymbol>>;
    RString: ReturnType<typeof newRClassProxy<typeof RWorker.RString, RString>>;
    RCall: ReturnType<typeof newRClassProxy<typeof RWorker.RCall, RCall>>;
    /** @internal */
    constructor(chan: ChannelMain);
    /** @internal */
    init(): Promise<void>;
    purge(): Promise<void>;
    destroy(x: RObject): Promise<void>;
    size(): Promise<number>;
    /**
     * Evaluate the given R code.
     *
     * Stream outputs and any conditions raised during exectution are written to
     * the JavaScript console. The returned R object is protected by the shelter.
     * @param {string} code The R code to evaluate.
     * @param {EvalROptions} [options] Options for the execution environment.
     * @returns {Promise<RObject>} The result of the computation.
     */
    evalR(code: string, options?: EvalROptions): Promise<RObject>;
    /**
     * Evaluate the given R code, capturing output.
     *
     * Stream outputs and conditions raised during exectution are captured and
     * returned as part of the output of this function. Returned R objects are
     * protected by the shelter.
     * @param {string} code The R code to evaluate.
     * @param {EvalROptions} [options] Options for the execution environment.
     * @returns {Promise<{result: RObject, output: unknown[]}>} An object
     * containing the result of the computation and and array of captured output.
     */
    captureR(code: string, options?: EvalROptions): Promise<{
        result: RObject;
        output: unknown[];
    }>;
}
