import type { HealthCheck, HealthMonitoring } from '../interfaces/core.js';
import { HealthMonitoringDecorator } from './base.js';
export type { HealthCheck };
/**
 * Circuit breaker configuration
 */
export type CircuitBreakerConfig = {
    failureThreshold: number;
    successThreshold: number;
    timeout: number;
    resetTimeoutMs: number;
};
declare enum CircuitState {
    CLOSED = "CLOSED",
    OPEN = "OPEN",
    HALF_OPEN = "HALF_OPEN"
}
/**
 * Circuit breaker for health monitoring
 * Prevents cascade failures by stopping requests to unhealthy providers
 * Automatically recovers when provider becomes healthy again
 * Implements state machine: CLOSED -> OPEN -> HALF_OPEN -> CLOSED
 */
export declare class CircuitBreakerHealthMonitoring extends HealthMonitoringDecorator {
    private readonly config;
    private state;
    private failureCount;
    private successCount;
    private nextAttempt;
    constructor(wrapped: HealthMonitoring, config?: CircuitBreakerConfig);
    healthCheck(): Promise<HealthCheck>;
    /**
     * Handle successful health check
     */
    private onSuccess;
    /**
     * Handle failed health check
     */
    private onFailure;
    /**
     * Get current circuit state (useful for monitoring)
     */
    getState(): CircuitState;
}
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