import {
  type IMigrationGenerator,
  type MaybePromise,
  type MigrationsOptions,
  type NamingStrategy,
} from '@mikro-orm/core';
import type { AbstractSqlDriver } from '@mikro-orm/sql';
/** Base class for generating migration source files from schema diffs. */
export declare abstract class MigrationGenerator implements IMigrationGenerator {
  protected readonly driver: AbstractSqlDriver;
  protected readonly namingStrategy: NamingStrategy;
  protected readonly options: MigrationsOptions;
  constructor(driver: AbstractSqlDriver, namingStrategy: NamingStrategy, options: MigrationsOptions);
  /**
   * @inheritDoc
   */
  generate(
    diff: {
      up: string[];
      down: string[];
    },
    path?: string,
    name?: string,
  ): Promise<[string, string]>;
  /**
   * @inheritDoc
   */
  createStatement(sql: string, padLeft: number): string;
  /**
   * @inheritDoc
   */
  abstract generateMigrationFile(
    className: string,
    diff: {
      up: string[];
      down: string[];
    },
  ): MaybePromise<string>;
}