/**
 * MCP Audit Logger Service
 *
 * Logs all external MCP operations for security auditing.
 * Tracks approval decisions, connections, tool calls, and errors.
 */
import type { MCPAuditLogEntry, MCPDashboardMetrics } from '../types/mcp-client.types.js';
/**
 * MCP Audit Logger Service
 *
 * Responsibilities:
 * - Log all external MCP operations
 * - Track approval decisions
 * - Track connections and disconnections
 * - Track tool calls with timing
 * - Support both file-based and memory-based logging
 */
export declare class MCPAuditLoggerService {
    private logPath;
    private writeToFile;
    private initialized;
    private memoryLog;
    constructor(logPath?: string, writeToFile?: boolean);
    /**
     * Initialize the audit logger
     */
    initialize(): void;
    /**
     * Log an approval decision
     */
    logApproval(serverId: string, approved: boolean, decision?: string, notes?: string): Promise<void>;
    /**
     * Log a connection attempt
     */
    logConnection(serverId: string, success: boolean, error?: string): Promise<void>;
    /**
     * Log a disconnection
     */
    logDisconnection(serverId: string): Promise<void>;
    /**
     * Log a tool call
     */
    logToolCall(serverId: string, toolName: string, success: boolean, durationMs: number, error?: string): Promise<void>;
    /**
     * Log an error
     */
    logError(serverId: string, error: string, details?: Record<string, unknown>): Promise<void>;
    /**
     * Get recent audit entries from memory
     */
    getRecentEntries(limit?: number): MCPAuditLogEntry[];
    /**
     * Get entries for a specific server
     */
    getServerEntries(serverId: string, limit?: number): MCPAuditLogEntry[];
    /**
     * Get entries by operation type
     */
    getEntriesByOperation(operation: MCPAuditLogEntry['operation'], limit?: number): MCPAuditLogEntry[];
    /**
     * Get statistics summary
     */
    getStats(): {
        byOperation: Record<string, number>;
        byServer: Record<string, number>;
        successRate: number;
        totalEntries: number;
    };
    /**
     * Load historical entries from file
     */
    loadHistoricalEntries(limit?: number): Promise<MCPAuditLogEntry[]>;
    /**
     * Get aggregated metrics for dashboard display.
     * Pure in-memory, synchronous computation.
     */
    getDashboardMetrics(): MCPDashboardMetrics;
    private accumulateServerEntry;
    private buildRecentToolCalls;
    private buildServerMetrics;
    private getConnectionState;
    private groupToolCalls;
    /**
     * Clear the in-memory log
     */
    clearMemoryLog(): void;
    /**
     * Write an entry to both memory and file
     */
    private writeEntry;
}
/**
 * Get the MCP Audit Logger service instance
 */
export declare function getMCPAuditLogger(logPath?: string, writeToFile?: boolean): MCPAuditLoggerService;
/**
 * Reset the singleton (for testing)
 */
export declare function resetMCPAuditLogger(): void;
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