/**
 * Analytics event collector and batch manager
 * Buffers events in memory and periodically flushes to analytics server
 */
import { AnalyticsConfig, ToolExecutionMetadata } from './types.js';
/**
 * AnalyticsCollector - Manages event buffering and batch sending
 * Implements privacy-first analytics with automatic flushing
 */
export declare class AnalyticsCollector {
    private buffer;
    private config;
    private flushTimer;
    private sessionId;
    private sequenceNumber;
    private isShuttingDown;
    private consecutiveFailures;
    private circuitOpen;
    private circuitOpenUntil;
    private readonly MAX_CONSECUTIVE_FAILURES;
    private readonly CIRCUIT_BREAKER_RESET_MS;
    private errorCount;
    private successCount;
    private readonly ERROR_THRESHOLD;
    private lastFlushTime;
    private flushCount;
    private readonly MIN_FLUSH_INTERVAL_MS;
    private readonly MAX_FLUSHES_PER_HOUR;
    private readonly MAX_EVENTS_PER_MINUTE;
    private recentEventTimestamps;
    private readonly MAX_BUFFER_SIZE;
    private readonly FLUSH_INTERVAL_MS;
    constructor(config: AnalyticsConfig);
    /**
     * Track a tool execution event
     * Fails silently - analytics should never break the application
     */
    trackToolCall(tool: string, status: 'success' | 'error', metadata?: ToolExecutionMetadata): Promise<void>;
    /**
     * Flush buffered events to analytics server
     * Called automatically on timer or when buffer is full
     * Implements circuit breaker pattern (3.7)
     */
    flush(): Promise<void>;
    /**
     * Start periodic flush timer
     */
    private startFlushTimer;
    /**
     * Stop flush timer
     */
    private stopFlushTimer;
    /**
     * Generate unique session ID
     * Used for tracking tool call sequences in detailed mode
     */
    private generateSessionId;
    /**
     * Public shutdown method called by main shutdown handler
     * Ensures buffered events are sent before process exits
     */
    shutdown(): Promise<void>;
    /**
     * Get current buffer size (for testing)
     */
    getBufferSize(): number;
    /**
     * Get session ID (for testing)
     */
    getSessionId(): string;
}
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