import { OperationOptions } from '@azure/core-http';
import { PipelineOptions } from '@azure/core-http';
import { TokenCredential } from '@azure/core-http';

/**
 * The client class used to interact with the App Configuration service.
 */
export declare class ConfigurationClient {
    private client;
    /**
     * Creates an instance of a ConfigurationClient.
     *
     * Example usage:
     * ```ts
     * import { ConfigurationClient} from "@azure/ai-text-analytics";
     * import { DefaultAzureCredential} from "@azure/identity";
     *
     * const client = new ConfigurationClient(
     *    "<app configuration endpoint>",
     *    new DefaultAzureCredential()
     * );
     * ```
     * @param endpointUrl - the URL to the App Configuration endpoint
     * @param credential - used to authenticate requests to the service
     * @param options - optional configuration used to send requests to the service
     */
    constructor(endpointUrl: string, credential: TokenCredential, options?: ConfigurationClientOptions);
    /**
     * Retrieve the contents of an App Configuration setting by name (key).
     *
     * @param key - the unique name of the setting to get
     * @param options - optional configuration for the operation
     */
    getConfigurationSetting(key: string, options?: GetConfigurationSettingOptions): Promise<ConfigurationSetting>;
    /**
     * Retrieve an updated value of an App Configuration setting, allowing for
     * the use of entity tags to request the new value only if it has changed.
     *
     * @param setting - the setting to retrieve from the service
     * @param options - optional configuration for the operation
     */
    getConfigurationSetting(setting: ConfigurationSetting, options?: GetConfigurationSettingOptions): Promise<ConfigurationSetting>;
}

/**
 * Client options used to configure App Configuration API requests.
 */
export declare interface ConfigurationClientOptions extends PipelineOptions {
}

export declare interface ConfigurationSetting {
    /** The unique name of the key-value. */
    key: string;
    /** The label of the key-value. */
    label?: string;
    /** The content type of the key-value. */
    contentType?: string;
    /** The value of the key-value. */
    value?: string;
    /** The time the key-value was last modified. */
    lastModified?: Date;
    /** Dictionary of <string> */
    tags?: {
        [propertyName: string]: string;
    };
    /** Indicates whether or not this key-value is readonly. */
    isReadOnly?: boolean;
    /** The entity-tag of the key-value. */
    etag?: string;
}

/**
 * Options for the `getConfigurationSetting` method of `ConfigurationClient`.
 */
export declare interface GetConfigurationSettingOptions extends OperationOptions {
    /**
     * If set to `true`, the method will use entity tags to instruct the service
     * to send an updated value only if the value has changed.
     *
     * NOTE: This option is only supported if passing a full
     * `ConfigurationSetting` object with an `etag` as the first parameter to
     * `getConfigurationSetting`.
     */
    onlyIfChanged?: boolean;
}

export { }