import { Observable } from 'rxjs';
import { UnitBase } from '../lib/abstract-unit-base';
import { BoolUnit } from '../lib/bool-unit';
import { StringUnit } from '../lib/string-unit';
import { NumUnit } from '../lib/num-unit';
import { ListUnit } from '../lib/list-unit';
import { DictUnit } from '../lib/dict-unit';
import { GenericUnit } from '../lib/generic-unit';
/**
 * @param unit The Unit being used as the source observable for creating a new Observable.
 *
 * @category Units
 */
export declare type UnitStreamObservableProducer<T = UnitBase<any>, R = any> = (unit: T) => Observable<R>;
/**
 * Type of {@link DictUnit}'s value, a dictionary object.
 *
 * @category Units
 */
export declare type DictValue<T, K extends keyof T = keyof T> = Record<K, T[K]>;
/**
 * Shared configuration options for all the Units.
 *
 * @category Units
 */
export interface SharedUnitConfig<T> {
    /**
     * A flag to control the replay behaviour of a Unit.
     * It decides whether the value should be replayed when you subscribe to the default Observable.
     *
     * @default `true`
     * @category Common
     */
    replay?: boolean;
    /**
     * Optional config option to set the cache size.
     * It can be minimum `1`, and maximum `Infinity`.
     * Otherwise, if it's not provided, or it's not valid, the default cache size `2` will be used.
     *
     * @default `2`
     * @category Units
     */
    cacheSize?: number;
    /**
     * An optional flag to make the Unit's value immutable.
     *
     * @default `false`
     * @category Units
     */
    immutable?: boolean;
    /**
     * An optional flag to make the Unit persistent, using LocalStorage or SessionStorage.
     * An id (see {@link BaseConfig.id}) is mandatory to make it work.
     *
     * @default `false`
     * @category Units
     */
    persistent?: boolean;
    /**
     * The Storage to be used for storing the value if the Unit is persistent. \
     * It can be either `LocalStorage` or `SessionStorage` or any other API,
     * that implements `Storage` API interface.
     *
     * @default {@link Configuration.storage}
     * @category Units
     */
    storage?: Storage;
    /**
     * An optional flag to disable/enable the distinct value check on the dispatched values.
     *
     * @default `false`
     * @category Units
     */
    distinctDispatchCheck?: boolean;
}
/**
 * Configuration options for all the Units.
 *
 * @category Units
 */
export interface UnitConfig<T> extends SharedUnitConfig<T> {
    /**
     * A unique id to identify a Unit.
     * It's required for a Unit to be persistent.
     *
     * @default `undefined`
     */
    id?: string;
    /**
     * The initial value for the Unit to be used instead of the default value.
     * Type T is the type of the Unit's value. i.e. boolean for BoolUnit.
     * If an `initialValue` is not provided or if its invalid, it'll be ignored,
     * and the default value of the Unit will be used instead.
     *
     * @default
     * BoolUnit: `false` \
     * NumUnit: `0` \
     * StringUnit: `''` \
     * ListUnit: `[]` \
     * DictUnit: `{}` \
     * GenericUnit: `undefined`
     * @category Units
     */
    initialValue?: T;
    /**
     * An optional custom check function, if provided, can allow or disallow values from getting through dispatch.
     *
     * @default `undefined`
     * @category Units
     */
    customDispatchCheck?: (currentValue: T, nextValue: T) => boolean;
    /**
     * Set it to `true` to debounce the dispatch method.
     * If set it to `true` the default wait-time is 200ms,
     * otherwise you can pass a `number` as wait-time, which is in ms.
     *
     * @default `false`
     * @category Units
     */
    dispatchDebounce?: boolean | number;
    /**
     * If the dispatchDebounce is enabled, the debounce mode determines on which edge of the wait-time, the call passes through.
     * In a debounce wait-time span,
     * START means only the first call to dispatch gets through.
     * END means only the last call to dispatch gets through.
     * BOTH means both, the first and last dispatch calls get through.
     * The default is `END`.
     *
     * @default `END`
     * @category Units
     */
    dispatchDebounceMode?: 'START' | 'END' | 'BOTH';
}
/**
 * Union type of all the Units.
 *
 * @category Units
 */
export declare type Unit = BoolUnit | StringUnit | NumUnit | ListUnit<any> | DictUnit<any> | GenericUnit<any>;
/**
 * @internal please do not use.
 */
export declare type UnitToValueType<T extends Unit> = T extends NumUnit ? number : T extends StringUnit ? string : T extends BoolUnit ? boolean : T extends GenericUnit<infer X> | DictUnit<infer X> | ListUnit<infer X> ? X : never;
/**
 * @internal please do not use.
 */
export declare type ValueToUnitType<T> = [T] extends [null | undefined | Function] ? GenericUnit<any> : T extends boolean ? BoolUnit : T extends number ? NumUnit : T extends string ? StringUnit : T extends any[] ? ListUnit<T> : T extends DictValue<T> ? DictUnit<T> : Unit;