/**
 * Evaluate Feature Flag Service
 * Evaluates a single feature flag with full details
 */
import { type ServiceOptions, type EvaluateFlagResponse } from '@plyaz/types/api';
import type { FeatureFlagContext } from '@plyaz/types/features';
import type { EndpointsList } from '@/api/endpoints';
import type { FetchResponse } from 'fetchff';
/**
 * Request payload for evaluateFeatureFlag
 */
export interface EvaluateFeatureFlagPayload<TKey extends string = string> {
    key: TKey;
    context?: FeatureFlagContext;
}
/**
 * Evaluate a feature flag with full details
 * Uses endpoint: POST /feature-flags/:key/evaluate
 *
 * @param payload - Flag key and optional context
 * @param options - Optional service options
 * @returns Promise<EvaluateFlagResponse>
 *
 * @example
 * ```typescript
 * // Basic usage
 * const result = await evaluateFeatureFlag({ key: 'experiment-a' });
 * console.log(result.data.data.value);   // 'variant-1'
 * console.log(result.data.data.reason);  // 'matched rule: premium users'
 *
 * // With context
 * const result = await evaluateFeatureFlag({
 *   key: 'pricing-tier',
 *   context: { userId: 'user-123', attributes: { plan: 'enterprise' } }
 * });
 * ```
 */
export declare function evaluateFeatureFlag<TKey extends string = string, TEndpoints = EndpointsList>(payload: EvaluateFeatureFlagPayload<TKey>, options?: ServiceOptions<TEndpoints>): Promise<FetchResponse<EvaluateFlagResponse<TKey>>>;
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