/**
 * Document Storage Engine
 *
 * Main entry point for MongoDB-compatible document storage
 * Manages multiple databases and provides high-level API
 */
import { DocumentStorageConfig, IDocumentStorageEngine, IDocumentDatabase } from './interface.js';
/**
 * Document Storage Engine Implementation
 */
export declare class DocumentStorageEngine implements IDocumentStorageEngine {
    private databases;
    private config;
    private initialized;
    constructor(config: DocumentStorageConfig);
    /**
     * Initialize the storage engine
     */
    initialize(): Promise<void>;
    /**
     * Create a new database
     */
    createDatabase(name: string): Promise<IDocumentDatabase>;
    /**
     * Get existing database
     */
    getDatabase(name: string): Promise<IDocumentDatabase | null>;
    /**
     * Drop a database
     */
    dropDatabase(name: string): Promise<boolean>;
    /**
     * List all databases
     */
    listDatabases(): Promise<string[]>;
    /**
     * Close all connections and cleanup
     */
    close(): Promise<void>;
    /**
     * Health check - verify all systems are operational
     */
    ping(): Promise<boolean>;
    /**
     * Get storage metrics
     */
    getMetrics(): Promise<any>;
    /**
     * Create storage engine with simplified configuration
     */
    static create(config: {
        d1Database: any;
        kvStore?: any;
        r2Bucket?: any;
        options?: Partial<DocumentStorageConfig>;
    }): Promise<DocumentStorageEngine>;
    /**
     * Create a database with collections from schema
     */
    createDatabaseWithSchema(name: string, schema: {
        collections: Record<string, {
            validator?: any;
            indexes?: Array<{
                key: any;
                options?: any;
            }>;
            options?: any;
        }>;
    }): Promise<IDocumentDatabase>;
    /**
     * Migrate data between storage versions
     */
    migrate(fromVersion: string, toVersion: string, options?: {
        dryRun?: boolean;
        collections?: string[];
    }): Promise<{
        success: boolean;
        migratedCollections: number;
        migratedDocuments: number;
        errors: string[];
    }>;
    /**
     * Get storage engine configuration
     */
    getConfiguration(): DocumentStorageConfig;
    /**
     * Update storage engine configuration
     */
    updateConfiguration(updates: Partial<DocumentStorageConfig>): Promise<void>;
    private migrateCollection;
}
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