import { EvaluationContext } from './interfaces/evaluation-context.interface';
import { BooleanEvaluationDetails, EvaluateBooleanOptions } from './interfaces/evaluation-details.interface';
import { FeatureFlagGuardOptions } from './interfaces/feature-flag.interface';
import { FeatureFlagLifecycleMetadata, FlagKey, FlagRegistry } from './interfaces/flag-registry.interface';
import { FeatureFlagService } from './services/feature-flag.service';
export interface TypedFeatureFlagClient<TFlags extends FlagRegistry> {
    isEnabled<K extends FlagKey<TFlags>>(flagKey: K, context?: EvaluationContext, options?: EvaluateBooleanOptions): Promise<boolean>;
    evaluateBoolean<K extends FlagKey<TFlags>>(flagKey: K, context?: EvaluationContext, options?: EvaluateBooleanOptions): Promise<BooleanEvaluationDetails>;
    registry: TFlags;
}
export interface TypedFeatureFlagDecorators<TFlags extends FlagRegistry> {
    FeatureFlag<K extends FlagKey<TFlags>>(flagKey: K, options?: FeatureFlagGuardOptions): ClassDecorator & MethodDecorator;
}
export type FlagLifecycleStatusName = 'active' | 'stale' | 'expired';
export interface FlagLifecycleStatus extends FeatureFlagLifecycleMetadata {
    status: FlagLifecycleStatusName;
    tags: string[];
    staleAt?: Date;
    expiresAt?: Date;
}
export declare function defineFlags<const TFlags extends FlagRegistry>(flags: TFlags): TFlags;
export declare function createFeatureFlagClient<TFlags extends FlagRegistry>(service: FeatureFlagService, registry: TFlags): TypedFeatureFlagClient<TFlags>;
export declare function createFeatureFlagDecorators<TFlags extends FlagRegistry>(registry: TFlags): TypedFeatureFlagDecorators<TFlags>;
export declare function getFlagLifecycleStatus(metadata: FeatureFlagLifecycleMetadata, now?: Date): FlagLifecycleStatus;