import { Context, DatafileContent, Feature, FeatureKey, InitialFeatures, StickyFeatures, VariableType, VariableValue, VariationValue, VariableKey } from "@featurevisor/types";
import { Logger, LogLevel } from "./logger";
import { Emitter } from "./emitter";
import { ConfigureBucketKey, ConfigureBucketValue } from "./bucket";
import { Evaluation } from "./evaluate";
export type ReadyCallback = () => void;
export type ActivationCallback = (featureName: string, variation: VariationValue, context: Context, captureContext: Context) => void;
export interface Statuses {
    ready: boolean;
    refreshInProgress: boolean;
}
export type InterceptContext = (context: Context) => Context;
export interface InstanceOptions {
    bucketKeySeparator?: string;
    configureBucketKey?: ConfigureBucketKey;
    configureBucketValue?: ConfigureBucketValue;
    datafile?: DatafileContent | string;
    datafileUrl?: string;
    handleDatafileFetch?: (datafileUrl: string) => Promise<DatafileContent>;
    initialFeatures?: InitialFeatures;
    interceptContext?: InterceptContext;
    logger?: Logger;
    onActivation?: ActivationCallback;
    onReady?: ReadyCallback;
    onRefresh?: () => void;
    onUpdate?: () => void;
    refreshInterval?: number;
    stickyFeatures?: StickyFeatures;
}
export type DatafileFetchHandler = (datafileUrl: string) => Promise<DatafileContent>;
type FieldType = string | VariableType;
type ValueType = VariableValue;
export declare function getValueByType(value: ValueType, fieldType: FieldType): ValueType;
export declare class FeaturevisorInstance {
    private bucketKeySeparator;
    private configureBucketKey?;
    private configureBucketValue?;
    private datafileUrl?;
    private handleDatafileFetch?;
    private initialFeatures?;
    private interceptContext?;
    private logger;
    private refreshInterval?;
    private stickyFeatures?;
    private datafileReader;
    private emitter;
    private statuses;
    private intervalId?;
    on: Emitter["addListener"];
    addListener: Emitter["addListener"];
    off: Emitter["removeListener"];
    removeListener: Emitter["removeListener"];
    removeAllListeners: Emitter["removeAllListeners"];
    constructor(options: InstanceOptions);
    setLogLevels(levels: LogLevel[]): void;
    onReady(): Promise<FeaturevisorInstance>;
    setDatafile(datafile: DatafileContent | string): void;
    setStickyFeatures(stickyFeatures: StickyFeatures | undefined): void;
    getRevision(): string;
    getFeature(featureKey: string | Feature): Feature | undefined;
    /**
     * Statuses
     */
    isReady(): boolean;
    /**
     * Refresh
     */
    refresh(): void;
    startRefreshing(): void;
    stopRefreshing(): void;
    /**
     * Flag
     */
    evaluateFlag(featureKey: FeatureKey | Feature, context?: Context): Evaluation;
    isEnabled(featureKey: FeatureKey | Feature, context?: Context): boolean;
    /**
     * Variation
     */
    evaluateVariation(featureKey: FeatureKey | Feature, context?: Context): Evaluation;
    getVariation(featureKey: FeatureKey | Feature, context?: Context): VariationValue | undefined;
    /**
     * Activate
     */
    activate(featureKey: FeatureKey, context?: Context): VariationValue | undefined;
    /**
     * Variable
     */
    evaluateVariable(featureKey: FeatureKey | Feature, variableKey: VariableKey, context?: Context): Evaluation;
    getVariable(featureKey: FeatureKey | Feature, variableKey: string, context?: Context): VariableValue | undefined;
    getVariableBoolean(featureKey: FeatureKey | Feature, variableKey: string, context?: Context): boolean | undefined;
    getVariableString(featureKey: FeatureKey | Feature, variableKey: string, context?: Context): string | undefined;
    getVariableInteger(featureKey: FeatureKey | Feature, variableKey: string, context?: Context): number | undefined;
    getVariableDouble(featureKey: FeatureKey | Feature, variableKey: string, context?: Context): number | undefined;
    getVariableArray(featureKey: FeatureKey | Feature, variableKey: string, context?: Context): string[] | undefined;
    getVariableObject<T>(featureKey: FeatureKey | Feature, variableKey: string, context?: Context): T | undefined;
    getVariableJSON<T>(featureKey: FeatureKey | Feature, variableKey: string, context?: Context): T | undefined;
}
export declare function createInstance(options: InstanceOptions): FeaturevisorInstance;
export {};