import { DB_Object, DBIndex, IndexKeys } from '@nu-art/ts-common';
export type ReduceFunction<ItemType, ReturnType> = (accumulator: ReturnType, arrayItem: ItemType, index?: number, array?: ItemType[]) => ReturnType;
export type DBConfig<T extends DB_Object, Ks extends keyof T> = {
    name: string;
    version?: number;
    autoIncrement?: boolean;
    uniqueKeys: Ks[];
    indices?: DBIndex<T>[];
    upgradeProcessor?: (db: IDBDatabase) => void;
};
export type IndexDb_Query = {
    query?: string | number | string[] | number[];
    indexKey?: string;
    limit?: number;
};
export declare class IndexedDB<T extends DB_Object, Ks extends keyof T> {
    private db;
    private config;
    private static dbs;
    static getOrCreate<T extends DB_Object, Ks extends keyof T>(config: DBConfig<T, Ks>): IndexedDB<T, Ks>;
    constructor(config: DBConfig<T, Ks>);
    exists(): Promise<IDBDatabaseInfo | undefined>;
    open(): Promise<IDBDatabase>;
    readonly store: (write?: boolean, store?: IDBObjectStore) => Promise<IDBObjectStore>;
    private getCursor;
    private cursorHandler;
    insert(value: T, _store?: IDBObjectStore): Promise<T>;
    insertAll(values: T[], _store?: IDBObjectStore): Promise<void>;
    upsert(value: T, _store?: IDBObjectStore): Promise<T>;
    upsertAll(values: T[], _store?: IDBObjectStore): Promise<void>;
    get(key: IndexKeys<T, Ks>): Promise<T | undefined>;
    query(query: IndexDb_Query): Promise<T[] | undefined>;
    queryFilter(filter: (item: T) => boolean, query?: IndexDb_Query): Promise<T[]>;
    WIP_queryMapNew<Type>(mapper: (item: T) => Type, filter?: (item: T) => boolean, query?: IndexDb_Query): Promise<Type[]>;
    WIP_queryMap<Type>(mapper: (item: T) => Type, filter?: (item: T) => boolean, query?: IndexDb_Query): Promise<Type[]>;
    queryFind(filter: (item: T) => boolean): Promise<T | undefined>;
    queryReduce<ReturnType>(reducer: ReduceFunction<T, ReturnType>, initialValue: ReturnType, filter?: (item: T) => boolean, query?: IndexDb_Query): Promise<ReturnType>;
    clearDB(): Promise<void>;
    deleteDB(): Promise<void>;
    deleteAll(keys: (IndexKeys<T, Ks> | T)[]): Promise<T[]>;
    delete(key: (IndexKeys<T, Ks> | T)): Promise<T>;
}