import { OnModuleInit } from "@nestjs/common";
import { AppLoggingService } from "../../logging/services/logging.service";
import { Neo4jService } from "../../neo4j/services/neo4j.service";
import { S3Service } from "../../../foundations/s3/services/s3.service";
/**
 * Migrator Service
 *
 * Manages Neo4j database migrations
 *
 * Features:
 * - Automatic migration discovery
 * - Transaction-based migration execution
 * - Migration versioning with date and increment
 * - Development and production support
 * - Unique constraint enforcement
 *
 * @example
 * Migration file: neo4j.migrations/20231201_01.ts
 * ```typescript
 * export const migration: MigrationInterface[] = [
 *   {
 *     query: 'CREATE CONSTRAINT user_email IF NOT EXISTS FOR (u:User) REQUIRE u.email IS UNIQUE',
 *     queryParams: {},
 *   },
 * ];
 * ```
 */
export declare class MigratorService implements OnModuleInit {
    protected readonly neo4jService: Neo4jService;
    protected readonly s3Service: S3Service;
    private readonly logger;
    constructor(neo4jService: Neo4jService, s3Service: S3Service, logger: AppLoggingService);
    onModuleInit(): Promise<void>;
    private createMigrationConstraints;
    private runMigrations;
    private getLastAppliedMigration;
    private discoverMigrations;
    private filterMigrationsToRun;
    private compareVersions;
    /**
     * Loads a migration file. Under module: NodeNext the compiled dist keeps a
     * NATIVE `import()`, which cannot load .ts migrations that use tsconfig
     * path aliases (e.g. `src/...`) — those only resolve through the host app's
     * CommonJS require chain (ts-node + tsconfig-paths in dev). Prefer require;
     * fall back to native import() for genuine ESM migration files.
     */
    private loadMigrationModule;
    private executeMigrations;
    /**
     * Normalise a migration's exported `migration` array to MigrationStep[].
     * Legacy `MigrationInterface[]` (no `kind`) entries become `{ kind: "cypher" }`.
     */
    private _normaliseSteps;
}
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