import type { Type } from './utility.js';
import type { QueryOptions, QuerySearch, Query, QueryOne, QueryConflictPaths, QueryUpdateResult } from './query.js';
import type { Repository } from './repository.js';
import type { IdValue } from './entity.js';
import type { UniversalQuerier } from './universalQuerier.js';
/**
 * Isolation levels for transactions.
 */
export type IsolationLevel = 'read uncommitted' | 'read committed' | 'repeteable read' | 'serializable';
export interface Querier extends UniversalQuerier {
    findOneById<E>(entity: Type<E>, id: IdValue<E>, q?: QueryOne<E>): Promise<E>;
    findOne<E>(entity: Type<E>, q: QueryOne<E>): Promise<E>;
    findMany<E>(entity: Type<E>, q: Query<E>): Promise<E[]>;
    findManyAndCount<E>(entity: Type<E>, q: Query<E>): Promise<[E[], number]>;
    count<E>(entity: Type<E>, q: QuerySearch<E>): Promise<number>;
    insertOne<E>(entity: Type<E>, payload: E): Promise<IdValue<E>>;
    insertMany<E>(entity: Type<E>, payload: E[]): Promise<IdValue<E>[]>;
    updateOneById<E>(entity: Type<E>, id: IdValue<E>, payload: E): Promise<number>;
    updateMany<E>(entity: Type<E>, q: QuerySearch<E>, payload: E): Promise<number>;
    upsertOne<E>(entity: Type<E>, conflictPaths: QueryConflictPaths<E>, payload: E): Promise<QueryUpdateResult>;
    saveOne<E>(entity: Type<E>, payload: E): Promise<IdValue<E>>;
    saveMany<E>(entity: Type<E>, payload: E[]): Promise<IdValue<E>[]>;
    deleteOneById<E>(entity: Type<E>, id: IdValue<E>, opts?: QueryOptions): Promise<number>;
    deleteMany<E>(entity: Type<E>, q: QuerySearch<E>, opts?: QueryOptions): Promise<number>;
    getRepository<E>(entity: Type<E>): Repository<E>;
    /**
     * whether this querier is in a transaction or not.
     */
    readonly hasOpenTransaction: boolean;
    /**
     * run the given callback inside a transaction in this querier.
     */
    transaction<T>(callback: () => Promise<T>): Promise<T>;
    /**
     * starts a new transaction in this querier.
     */
    beginTransaction(): Promise<void>;
    /**
     * commits the currently active transaction in this querier.
     */
    commitTransaction(): Promise<void>;
    /**
     * aborts the currently active transaction in this querier.
     */
    rollbackTransaction(): Promise<void>;
    /**
     * release the querier to the pool.
     */
    release(): Promise<void>;
}
/**
 * logger function to debug queries.
 */
export type Logger = (message: unknown, ...args: unknown[]) => unknown;
export type ExtraOptions = {
    readonly logger?: Logger;
};