/**
 * Health Check and Monitoring System
 *
 * Proactive monitoring of OpenRouter services, model availability,
 * and system health with automatic degradation and recovery.
 */
export interface HealthCheckResult {
    service: string;
    status: 'healthy' | 'degraded' | 'unhealthy';
    responseTime: number;
    lastChecked: Date;
    consecutiveFailures: number;
    lastError?: string;
    metadata?: Record<string, any>;
}
export interface ModelHealth {
    provider: string;
    model: string;
    status: 'available' | 'degraded' | 'unavailable';
    avgResponseTime: number;
    successRate: number;
    lastTested: Date;
    errorCount: number;
}
export interface SystemHealth {
    overall: 'healthy' | 'degraded' | 'unhealthy';
    openrouter: HealthCheckResult;
    database: HealthCheckResult;
    mcpServer: HealthCheckResult;
    models: ModelHealth[];
    timestamp: Date;
}
export declare class HealthMonitor {
    private checkInterval;
    private healthResults;
    private modelHealth;
    private monitoringInterval;
    private testModels;
    constructor(checkInterval?: number);
    /**
     * Start continuous health monitoring
     */
    startMonitoring(): void;
    /**
     * Stop health monitoring
     */
    stopMonitoring(): void;
    /**
     * Run all health checks
     */
    runHealthChecks(): Promise<void>;
    /**
     * Check OpenRouter API health
     */
    private checkOpenRouterHealth;
    /**
     * Check database health
     */
    private checkDatabaseHealth;
    /**
     * Check MCP server health
     */
    private checkMCPServerHealth;
    /**
     * Check model health by testing key models
     */
    private checkModelHealth;
    /**
     * Test individual model health
     */
    private testModelHealth;
    /**
     * Update health result with tracking
     */
    private updateHealthResult;
    /**
     * Get current system health
     */
    getSystemHealth(): SystemHealth;
    /**
     * Get health status for a specific model
     */
    getModelHealth(provider: string, model: string): ModelHealth | null;
    /**
     * Get list of healthy models for fallback
     */
    getHealthyModels(): string[];
    /**
     * Check if a specific service is healthy
     */
    isServiceHealthy(serviceName: string): boolean;
    /**
     * Check if a specific model is available
     */
    isModelAvailable(provider: string, model: string): boolean;
    /**
     * Add custom test model
     */
    addTestModel(modelId: string): void;
    /**
     * Remove test model
     */
    removeTestModel(modelId: string): void;
    /**
     * Get detailed health report
     */
    getDetailedHealthReport(): {
        summary: SystemHealth;
        errorStats: any;
        circuitBreakers: any;
        uptime: number;
    };
}
export declare const globalHealthMonitor: HealthMonitor;
/**
 * Express middleware for health check endpoint
 */
export declare function healthCheckMiddleware(req: any, res: any, next: any): void;
/**
 * CLI command for health status
 */
export declare function displayHealthStatus(): Promise<void>;