import type { ObjectWithId, UnixTimestamp } from '@naturalcycles/js-lib/types';
import type { CommonDB } from './commondb/common.db.js';
/**
 * Similar to SQL INSERT, UPDATE.
 * Insert will fail if row already exists.
 * Update will fail if row is missing.
 * Upsert will auto-detect and use Insert or Update to not fail.
 *
 * Default is Upsert.
 */
export type CommonDBSaveMethod = 'upsert' | 'insert' | 'update';
/**
 * Transaction is committed when the function returns resolved Promise (aka "returns normally").
 *
 * Transaction is rolled back when the function returns rejected Promise (aka "throws").
 */
export type DBTransactionFn = (tx: DBTransaction) => Promise<void>;
/**
 * Transaction context.
 * Has similar API than CommonDB, but all operations are performed in the context of the transaction.
 */
export interface DBTransaction {
    getByIds: CommonDB['getByIds'];
    saveBatch: CommonDB['saveBatch'];
    deleteByIds: CommonDB['deleteByIds'];
    /**
     * Commit the transaction.
     * May throw.
     */
    commit: () => Promise<void>;
    /**
     * Perform a graceful rollback.
     * It'll rollback the transaction and won't throw/re-throw any errors.
     */
    rollback: () => Promise<void>;
}
export interface CommonDBTransactionOptions {
    /**
     * Default is false.
     * If set to true - Transaction is created as read-only.
     */
    readOnly?: boolean;
}
export interface CommonDBOptions {
    /**
     * If passed - the operation will be performed in the context of that DBTransaction.
     * Note that not every type of operation supports Transaction
     * (e.g in Datastore queries cannot be executed inside a Transaction).
     * Also, not every CommonDB implementation supports Transactions.
     */
    tx?: DBTransaction;
}
export interface CommonDBReadOptions extends CommonDBOptions {
    /**
     * If provided (and supported by the DB) - will read the data at that point in time (aka "Time machine" feature).
     * This feature is named PITR (point-in-time-recovery) query in Datastore.
     */
    readAt?: UnixTimestamp;
}
/**
 * All properties default to undefined.
 */
export interface CommonDBSaveOptions<ROW extends ObjectWithId> extends CommonDBOptions {
    excludeFromIndexes?: (keyof ROW)[];
    /**
     * Default is `upsert`
     */
    saveMethod?: CommonDBSaveMethod;
    /**
     * Only applicable to tables where id is "auto-generated by DB", e.g `auto_increment` in MySQL.
     * By default it's false, so, auto-generated id will NOT be assigned/returned.
     * Setting it to true will assign and return auto-generated id (on all rows, one by one).
     * It's not true by default, because getting auto-generated id incurs an overhead of doing extra call (e.g LAST_INSERT_ID() in MySQL).
     */
    assignGeneratedIds?: boolean;
}
export type CommonDBStreamOptions = CommonDBReadOptions;
export interface CommonDBCreateOptions extends CommonDBOptions {
    /**
     * Caution! If set to true - will actually DROP the table!
     *
     * @default false
     */
    dropIfExists?: boolean;
}
export interface RunQueryResult<T> {
    rows: T[];
    endCursor?: string;
}
export type DBOperation = DBSaveBatchOperation<any> | DBDeleteByIdsOperation;
export interface DBSaveBatchOperation<ROW extends ObjectWithId> {
    type: 'saveBatch';
    table: string;
    rows: ROW[];
    opt?: CommonDBSaveOptions<ROW>;
}
export interface DBDeleteByIdsOperation {
    type: 'deleteByIds';
    table: string;
    ids: string[];
    opt?: CommonDBOptions;
}
export declare enum DBRelation {
    ONE_TO_ONE = "ONE_TO_ONE",
    ONE_TO_MANY = "ONE_TO_MANY"
}
export declare enum DBModelType {
    DBM = "DBM",
    BM = "BM"
}