/**
 * Copyright 2022 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 Feature from './models/Feature';
import Property from './models/Property';
export default class AppConfiguration {
    private static instance;
    private isInitialized;
    private isInitializedContext;
    private constructor();
    /**
     * Initialize the sdk to connect with your App Configuration service instance.
     *
     * The method throws {@link Error} if any of the params are missing or invalid.
     *
     * @param {string} region - REGION name where the App Configuration service instance is created.
     * @param {string} guid - GUID of the App Configuration service.
     * @param {string} apikey - Client SDK APIKEY of the App Configuration service.
     * @memberof AppConfiguration
     */
    init(region: string, guid: string, apikey: string): void;
    /**
     * Sets the context of the SDK.
     *
     * throws {@link Error} if {@link init} is not performed before calling this method.
     *
     * throws {@link Error} if `collectionId` is not passed or invalid.
     *
     * throws {@link Error} if `environmentId` is not passed or invalid.
     *
     * @param {string} collectionId - Id of the collection created in App Configuration service instance.
     * @param {string} environmentId - Id of the environment created in App Configuration service instance.
     * @return {*}  \{Promise<void>\}
     * @memberof AppConfiguration
     */
    setContext(collectionId: string, environmentId: string): Promise<void>;
    /**
     * Returns the {@link Feature} object with the details of the feature flag specified by the `featureId`.
     *
     * throws {@link Error} if the featureId does not exists or invalid.
     *
     * throws {@link Error} if called before SDK is initialised.
     *
     * @param {string} featureId - The Feature flag Id.
     * @return {*}  {@link Feature} object.
     * @memberof AppConfiguration
     */
    getFeature(featureId: string): Feature;
    /**
     * Returns the object of type \{ [x: string]: Feature \} containing details of all the feature flags associated with the `collectionId`.
     *
     * @return {*}  \{ [x: string]: {@link Feature }\}
     * @memberof AppConfiguration
     */
    getFeatures(): {
        [x: string]: Feature;
    };
    /**
     * Returns the {@link Property} object with the details of the property specified by the `propertyId`.
     *
     * throws {@link Error} if the propertyId does not exists or invalid.
     *
     * throws {@link Error} if called before SDK is initialised.
     *
     * @param {string} propertyId
     * @return {*}  \{Property\}
     * @memberof AppConfiguration
     */
    getProperty(propertyId: string): Property;
    /**
     * Returns the object of type \{ [x: string]: Property \} containing details of all the properties associated with the `collectionId`.
     *
     * @return {*}  \{ [x: string]: {@link Property } \}
     * @memberof AppConfiguration
     */
    getProperties(): {
        [x: string]: Property;
    };
    /**
     * Instance of {@link EventEmitter} to listen to live configuration updates.
     *
     * @memberof AppConfiguration
     */
    emitter: {
        on: (event: string, fn: (...args: any[]) => void) => import("eventemitter3")<string | symbol, any>;
        emit: (event: string, ...args: any[]) => boolean;
    };
    /**
     * @internal
     *
     * Override the default App Configuration URL. This method should be invoked before the SDK initialization.
     * ```js
     * // Example
     * AppConfiguration.overrideServiceUrl('https://testurl.com');
     * ```
     *  NOTE: To be used for development purposes only.
     * @param url - The base url
     */
    static overrideServiceUrl(url: string): void;
    /**
     * Get the instance of {@link AppConfiguration}.
     *
     * @static
     * @return {*}
     * @memberof AppConfiguration
     */
    static getInstance(): AppConfiguration;
    static REGION_US_SOUTH: string;
    static REGION_EU_GB: string;
    static REGION_AU_SYD: string;
    static REGION_US_EAST: string;
    static REGION_EU_DE: string;
    static REGION_CA_TOR: string;
    static REGION_JP_TOK: string;
    static REGION_JP_OSA: string;
}