/**
 * Session retention and cleanup manager
 * Handles automated cleanup of session files based on configurable policies
 */
import type { SessionSummary } from '../types/session.types.js';
import { type BaseCleanupResult, type BaseFileInfo, BaseRetentionManager, type BaseRetentionPolicy, type RetentionLogger } from '../utils/base-retention-manager.js';
export interface SessionCleanupResult extends BaseCleanupResult {
    compressedSessions: string[];
    deletedSessions: string[];
}
export interface SessionFileInfo extends BaseFileInfo {
    session: SessionSummary;
    sessionId: string;
}
export type SessionRetentionPolicy = BaseRetentionPolicy;
/**
 * Session retention manager extending the base retention manager
 */
export declare class SessionRetentionManager extends BaseRetentionManager<SessionRetentionPolicy, SessionCleanupResult, SessionFileInfo> {
    protected readonly logger: RetentionLogger;
    /**
     * Analyse session directory and return session file information
     */
    analyzeSessionDirectory(sessionDir: string, sessions: SessionSummary[]): Promise<SessionFileInfo[]>;
    /**
     * Execute cleanup based on retention policies
     */
    cleanup(sessionDir: string, sessions: SessionSummary[]): Promise<SessionCleanupResult>;
    /**
     * Apply age-based cleanup: delete sessions older than maxAgeDays
     */
    private applyAgeBasedCleanup;
    /**
     * Apply size-based cleanup: keep total size under maxSizeMB
     */
    private applySizeBasedCleanup;
    /**
     * Apply count-based cleanup: keep maximum maxCount sessions
     */
    private applyCountBasedCleanup;
    /**
     * Apply compression policy: compress sessions older than compressAfterDays
     */
    private applySessionCompressionPolicy;
    /**
     * Delete a session file and its associated snapshot
     */
    private deleteSessionWithSnapshot;
    protected deleteItem(item: SessionFileInfo): Promise<void>;
    protected getItemAgeDays(item: SessionFileInfo): number;
    protected getItemDisplayId(item: SessionFileInfo): string;
    protected recordCompression(item: SessionFileInfo, result: SessionCleanupResult): void;
    protected recordDeletion(item: SessionFileInfo, result: SessionCleanupResult): void;
}
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