/**
 * State types for MCP server lifecycle management
 */
/**
 * Possible states for a managed server
 *
 * State transitions:
 * - disconnected → connecting (on start)
 * - connecting → connected (on successful connection)
 * - connecting → failed (on connection error, max retries exceeded)
 * - connected → unhealthy (on health check failures)
 * - connected → disconnected (on graceful stop)
 * - unhealthy → connected (on health check recovery)
 * - unhealthy → restarting (on auto-restart trigger)
 * - restarting → connecting (restart initiated)
 * - restarting → failed (max restart attempts exceeded)
 * - any → stopped (on manual stop)
 */
export type ServerStatus = 'disconnected' | 'connecting' | 'connected' | 'unhealthy' | 'restarting' | 'failed' | 'stopped';
/**
 * Result of a health check operation
 */
export interface HealthCheckResult {
    /** Whether the health check succeeded */
    healthy: boolean;
    /** Time taken for the health check in milliseconds */
    latencyMs: number;
    /** Error message if the check failed */
    error?: string;
    /** Timestamp of the health check */
    timestamp: Date;
}
/**
 * Statistics for restart attempts
 */
export interface RestartStats {
    /** Number of restart attempts made */
    attempts: number;
    /** Timestamp of the last restart attempt */
    lastAttempt?: Date;
    /** Whether the last restart attempt succeeded */
    lastSuccess?: boolean;
}
/**
 * Complete state for a managed server
 */
export interface ServerState {
    /** Current status of the server */
    status: ServerStatus;
    /** Timestamp when server entered current status */
    statusChangedAt: Date;
    /** Number of consecutive failed health checks */
    consecutiveHealthCheckFailures: number;
    /** Last health check result */
    lastHealthCheck?: HealthCheckResult;
    /** Restart statistics */
    restartStats: RestartStats;
    /** Process ID for stdio servers */
    pid?: number;
    /** Error message if in failed state */
    error?: string;
}
/**
 * Creates an initial server state
 */
export declare function createInitialState(): ServerState;
/**
 * Summary state for external consumers
 */
export interface ServerStateSummary {
    /** Server name */
    name: string;
    /** Current status */
    status: ServerStatus;
    /** Whether the server is healthy */
    healthy: boolean;
    /** Time in current status (milliseconds) */
    timeInStatus: number;
    /** Process ID if applicable */
    pid?: number;
    /** Last health check latency if available */
    lastLatencyMs?: number;
    /** Restart attempt count */
    restartAttempts: number;
    /** Error message if any */
    error?: string;
}
/**
 * Converts full state to summary
 */
export declare function toStateSummary(name: string, state: ServerState): ServerStateSummary;
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