import { ConversationState, WorkflowSession } from '../types';
import { IPersistentStorage, PeristenceHealthStatus } from './interfaces';
export declare class FileBasedStorage implements IPersistentStorage {
    private readonly dataDir;
    private readonly conversationsDir;
    private readonly workflowsDir;
    private readonly backupsDir;
    private readonly lockFile;
    constructor(dataDir?: string);
    /**
     * Initialize storage directories and ensure data integrity
     */
    initialize(): Promise<void>;
    saveConversation(conversation: ConversationState): Promise<void>;
    loadConversation(id: string): Promise<ConversationState | undefined>;
    deleteConversation(id: string): Promise<boolean>;
    listConversations(): Promise<string[]>;
    saveWorkflow(workflow: WorkflowSession): Promise<void>;
    loadWorkflow(id: string): Promise<WorkflowSession | undefined>;
    deleteWorkflow(id: string): Promise<boolean>;
    listWorkflows(): Promise<string[]>;
    createBackup(): Promise<string>;
    restoreFromBackup(backupPath: string): Promise<boolean>;
    checkHealth(): Promise<PeristenceHealthStatus>;
    cleanup(): Promise<void>;
    private ensureDirectories;
    private verifyDataIntegrity;
    private quarantineFile;
    private writeJsonFile;
    private readJsonFile;
    private copyDirectory;
    private clearDirectory;
    private removeDirectory;
    private calculateDirectoryChecksum;
    private calculateStorageUsage;
}
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