/**
 * @module
 * This module exports the FeatureFlagService class which creates
 * an service instance. It can be used to query, set, delete flags.
 * Also it can be used to validate the flags.
 */
import type { AppConfigurationClient, FeatureFlagServiceOptions } from "./utils/app-config.js";
import type { FeatureFlag, FeatureFlagVariant, FeatureFlagWithFiltersValidateOptions, FeatureFlagWithVariantsValidateOptions, FeatureFlagsRecord } from "./types.js";
import { AppConfigurationClientLite } from "./client.js";
export type { FeatureFlagServiceOptions } from "./utils/app-config.js";
export type { FeatureFlag, FeatureFlagsRecord, FeatureFlagVariant, FeatureFlagVariantName, FeatureFlagWithFiltersValidateOptions, FeatureFlagWithVariantsValidateOptions, } from "./types.js";
/**
 * Class based service for all Azure FeatureFlag.
 *
 * @example
 * ```ts
 * import { AppConfigurationClientLite } from "azure-feature-flags/client";
 * import { FeatureFlagService } from "azure-feature-flags"
 *
 * const connectionString = process.env.AZURE_CONFIG_ACCESS_STRING;
 * const client = new AppConfigurationClientLite(connectionString);
 * const service = new FeatureFlagService(client);
 *
 * const created = await service.set({ id: "flag-id", enabled: true });
 * const featureFlagsRecord = await service.getAllAsRecord();
 * const featureFlagsList = await service.getAllAsList();
 * const featureFlag = await service.getByKey("flag-id");
 * const enabledOrVariant = await service.getByKeyAndValidate("flag-id", { groups: ["admin"] });
 * const deleted = await service.delete("flag-id")
 * ```
 */
export declare class FeatureFlagService {
    #private;
    constructor(client: AppConfigurationClientLite | AppConfigurationClient);
    getAllAsRecord(options?: FeatureFlagServiceOptions): Promise<FeatureFlagsRecord>;
    getAllAsList(options?: FeatureFlagServiceOptions): Promise<FeatureFlag[]>;
    getByKey(key: string, options?: FeatureFlagServiceOptions): Promise<FeatureFlag | null>;
    set(featureFlag: FeatureFlag, options?: FeatureFlagServiceOptions): Promise<boolean>;
    delete(key: string, label?: string): Promise<boolean>;
    getByKeyAndValidate(key: string, options: FeatureFlagWithFiltersValidateOptions | FeatureFlagWithVariantsValidateOptions): Promise<boolean | FeatureFlagVariant>;
}