/**
 * Copyright 2014 IBM Corp. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import request = require('request');
export interface HeaderOptions {
    'X-Watson-Learning-Opt-Out'?: boolean;
    [key: string]: any;
}
export interface UserOptions {
    url?: string;
    version?: string;
    username?: string;
    password?: string;
    api_key?: string;
    apikey?: string;
    use_unauthenticated?: boolean;
    headers?: HeaderOptions;
    token?: string;
    iam_access_token?: string;
    iam_apikey?: string;
    iam_url?: string;
    disable_ssl_verification?: boolean;
}
export interface BaseServiceOptions extends UserOptions {
    headers: HeaderOptions;
    url: string;
    jar?: request.CookieJar;
    qs: any;
    rejectUnauthorized?: boolean;
}
export interface Credentials {
    username?: string;
    password?: string;
    api_key?: string;
    url?: string;
    iam_access_token?: string;
    iam_apikey?: string;
    iam_url?: string;
}
export declare class BaseService {
    static URL: string;
    name: string;
    serviceVersion: string;
    protected _options: BaseServiceOptions;
    protected serviceDefaults: object;
    protected tokenManager: any;
    /**
     * Internal base class that other services inherit from
     * @param {UserOptions} options
     * @param {string} [options.username] - required unless use_unauthenticated is set
     * @param {string} [options.password] - required unless use_unauthenticated is set
     * @param {boolean} [options.use_unauthenticated] - skip credential requirement
     * @param {HeaderOptions} [options.headers]
     * @param {boolean} [options.headers.X-Watson-Learning-Opt-Out=false] - opt-out of data collection
     * @param {string} [options.url] - override default service base url
     * @private
     * @abstract
     * @constructor
     * @throws {Error}
     * @returns {BaseService}
     */
    constructor(userOptions: UserOptions);
    /**
     * Retrieve this service's credentials - useful for passing to the authorization service
     *
     * Only returns a URL when token auth is used.
     *
     * @returns {Credentials}
     */
    getCredentials(): Credentials;
    /**
     * Set an IAM access token to use when authenticating with the service.
     * The access token should be valid and not yet expired.
     *
     * By using this method, you accept responsibility for managing the
     * access token yourself. You must set a new access token before this
     * one expires. Failing to do so will result in authentication errors
     * after this token expires.
     *
     * @param {string} iam_access_token - A valid, non-expired IAM access token
     * @returns {void}
     */
    setAccessToken(iam_access_token: string): void;
    /**
     * Guarantee that the next request you make will be IAM authenticated. This
     * performs any requests necessary to get a valid IAM token so that if your
     * next request involves a streaming operation, it will not be interrupted.
     *
     * @param {Function} callback - callback function to return flow of execution
     *
     * @returns {void}
     */
    protected preAuthenticate(callback: any): void;
    /**
     * Wrapper around `sendRequest` that determines whether or not IAM tokens
     * are being used to authenticate the request. If so, the token is
     * retrieved by the token manager.
     *
     * @param {Object} parameters - service request options passed in by user
     * @param {Function} callback - callback function to pass the response back to
     * @returns {ReadableStream|undefined}
     */
    protected createRequest(parameters: any, callback: any): any;
    /**
     * @private
     * @param {UserOptions} options
     * @returns {BaseServiceOptions}
     */
    private initCredentials;
    /**
     * Pulls credentials from env properties
     *
     * Property checked is uppercase service.name suffixed by _USERNAME and _PASSWORD
     *
     * For example, if service.name is speech_to_text,
     * env properties are SPEECH_TO_TEXT_USERNAME and SPEECH_TO_TEXT_PASSWORD
     *
     * @private
     * @param {string} name - the service snake case name
     * @returns {Credentials}
     */
    private getCredentialsFromEnvironment;
    /**
     * Pulls credentials from VCAP_SERVICES env property that bluemix sets
     * @param {string} vcap_services_name
     * @private
     * @returns {Credentials}
     */
    private getCredentialsFromBluemix;
}