// Copyright (c) 2019 Gonzalo Müller Bravo.

import type {
  Context,
  Element,
} from 'react'

export interface Dispatcher<ACTION> {
  (value: ACTION): void;
}
export interface Reducer<STATE, ACTION> {
  (prevState: STATE, action: ACTION): STATE;
}
export type NamedReducerValue<STATE, ACTION> = [STATE, Dispatcher<ACTION>]

export interface NamedReducerProps<STATE, ACTION> {
  name: string;
  reducer: Reducer<STATE, ACTION>;
  initialState: STATE;
  children: Element<any>;
}

export interface NamedReducerInterface<STATE, ACTION> {
  state: STATE;
  dispatch: Dispatcher<ACTION>;
}

declare export function NamedReducer<STATE, ACTION>(props: NamedReducerProps<STATE, ACTION>): Element<typeof NamedReducer>

declare export function useNamedReducer<STATE, ACTION>(name: string): NamedReducerInterface<STATE, ACTION>

declare export function useReducerState<STATE>(name: string): STATE

declare export function useReducerDispatcher<ACTION>(name: string): Dispatcher<ACTION>

declare export function useNamedReducerContext<STATE, ACTION>(name: string): Context<NamedReducerValue<STATE, ACTION>>