import type { firestore } from 'firebase-admin';
import type { BatchCallback, MigrationPredicate, MigrationResult, Migrator, SetDataGetter, SetOptions, SetPartialDataGetter, Traverser, UpdateDataGetter, UpdateFieldValueGetter } from '../../../api';
export type RegisteredCallbacks<D> = {
    onBeforeBatchStart?: BatchCallback<D>;
    onAfterBatchComplete?: BatchCallback<D>;
};
export declare abstract class AbstractMigrator<D> implements Migrator<D> {
    protected readonly registeredCallbacks: RegisteredCallbacks<D>;
    protected readonly migrationPredicates: MigrationPredicate<D>[];
    protected constructor(registeredCallbacks?: RegisteredCallbacks<D>, migrationPredicates?: MigrationPredicate<D>[]);
    protected get firestoreInstance(): firestore.Firestore;
    protected get firestoreConstructor(): typeof firestore;
    onBeforeBatchStart(callback: BatchCallback<D>): void;
    onAfterBatchComplete(callback: BatchCallback<D>): void;
    deleteField(field: string | firestore.FieldPath): Promise<MigrationResult>;
    deleteFields(...fields: (string | firestore.FieldPath)[]): Promise<MigrationResult>;
    renameField(oldField: string | firestore.FieldPath, newField: string | firestore.FieldPath): Promise<MigrationResult>;
    renameFields(...changes: [oldField: string | firestore.FieldPath, newField: string | firestore.FieldPath][]): Promise<MigrationResult>;
    protected migrateWithTraverser(migrateBatch: (batchDocs: firestore.QueryDocumentSnapshot<D>[]) => Promise<number>): Promise<MigrationResult>;
    protected shouldMigrateDoc(doc: firestore.QueryDocumentSnapshot<D>): boolean;
    abstract readonly traverser: Traverser<D>;
    abstract withPredicate(predicate: MigrationPredicate<D>): Migrator<D>;
    abstract withTraverser(traverser: Traverser<D>): Migrator<D>;
    abstract set(data: firestore.PartialWithFieldValue<D>, options: SetOptions): Promise<MigrationResult>;
    abstract set(data: firestore.WithFieldValue<D>): Promise<MigrationResult>;
    abstract setWithDerivedData(getData: SetPartialDataGetter<D>, options: SetOptions): Promise<MigrationResult>;
    abstract setWithDerivedData(getData: SetDataGetter<D>): Promise<MigrationResult>;
    abstract update<D>(data: firestore.UpdateData<D>, precondition?: firestore.Precondition): Promise<MigrationResult>;
    abstract update(field: string | firestore.FieldPath, value: any, ...moreFieldsOrPrecondition: any[]): Promise<MigrationResult>;
    abstract updateWithDerivedData(getData: UpdateDataGetter<D>, precondition?: firestore.Precondition): Promise<MigrationResult>;
    abstract updateWithDerivedData(getData: UpdateFieldValueGetter<D>): Promise<MigrationResult>;
}