// Copyright (c) 2020 Gonzalo Müller Bravo.
import React from 'react'
import type { Node, AbstractComponent } from 'react'

// Provider Component
/////////////////////

export type Id = string | number | symbol | null

export interface ProviderProps {
  id?: Id;
  children: Node;
}

export interface StateProviderProps<STATE> extends ProviderProps {
  initialState?: (() => STATE) | STATE;
}

// Reducer Component Definition
///////////////////////////////

export interface ReducerProps<STATE, REDUCER> extends StateProviderProps<STATE> {
  /**
   * Must always be assigned, although can be 'null' or 'undefined'.
   */
  reducer: REDUCER | null | typeof(undefined)
}

export interface SyncReducer<STATE, ACTION> {
  (prevState: STATE, action: ACTION, ...args: $ReadOnlyArray<any>): STATE
}

export interface SyncReducerProps<STATE, ACTION> extends ReducerProps<STATE, SyncReducer<STATE, ACTION>> {}

declare export class SyncReducerProvider<STATE, ACTION> extends React.Component<SyncReducerProps<STATE, ACTION>> {}

export interface AsyncReducer<STATE, ACTION> {
  (prevState: STATE, action: ACTION, ...args: $ReadOnlyArray<any>): Promise<STATE>
}

export interface AsyncReducerProps<STATE, ACTION> extends ReducerProps<STATE, AsyncReducer<STATE, ACTION>> {}

declare export class AsyncReducerProvider<STATE, ACTION> extends React.Component<AsyncReducerProps<STATE, ACTION>> {}

// Mapper Component Definition
//////////////////////////////

export interface MapperProps<STATE, MAPPER> extends StateProviderProps<STATE> {
  /**
   * Must always be assigned, although can be 'null' or 'undefined'.
   */
  mapper: MAPPER | null | typeof(undefined)
}

export interface SyncMapper<STATE, ACTION> {
  (action: ACTION, ...args: $ReadOnlyArray<any>): STATE
}

export interface SyncMapperProps<STATE, ACTION> extends MapperProps<STATE, SyncMapper<STATE, ACTION>> {}

declare export class SyncMapperProvider<STATE, ACTION> extends React.Component<SyncMapperProps<STATE, ACTION>> {}

export interface AsyncMapper<STATE, ACTION> {
  (action: ACTION, ...args: $ReadOnlyArray<any>): Promise<STATE>
}

export interface AsyncMapperProps<STATE, ACTION> extends MapperProps<STATE, AsyncMapper<STATE, ACTION>> {}

declare export class AsyncMapperProvider<STATE, ACTION> extends React.Component<AsyncMapperProps<STATE, ACTION>> {}

// Actuator Component Definition
////////////////////////////////

export interface ActuatorProps<ACTUATOR: Function = Function> extends ProviderProps {
  /**
   * Must always be assigned, although can be 'null' or 'undefined'.
   */
  actuator: ACTUATOR | null | typeof(undefined)
}

declare class ActuatorProvider<ACTUATOR: Function = Function> extends React.Component<ActuatorProps<ACTUATOR>> {}

// Providers Consumption
////////////////////////

export type Sync<RESULT = any> = RESULT
export type Async<RESULT = any> = Promise<RESULT>
export type DispatcherResult<RESULT = any> = Async<void | RESULT> | Sync<void | RESULT>

export interface Dispatcher<ACTION, DISPATCH: Async<> | Sync<> = Sync<void>> {
  (value: ACTION, ...args: $ReadOnlyArray<any>): DISPATCH
}

export interface ProviderValueObject {
  /**
   * provider id
   */
  +provider: Id
}

export interface StateProviderValueObject<
  STATE,
  ACTION,
  DISPATCH: Async<void | STATE> | Sync<void | STATE> = Sync<void>
> extends ProviderValueObject {
  +state: STATE;
  +dispatch: Dispatcher<ACTION, DISPATCH>;
}
export type ProviderValueTuple<
  STATE,
  ACTION,
  DISPATCH: Async<void | STATE> | Sync<void | STATE> = Sync<void>
> = [STATE, Dispatcher<ACTION, DISPATCH>, Id]

export type ProviderValue<
  STATE,
  ACTION,
  DISPATCH: Async<void | STATE> | Sync<void | STATE> = Sync<void>
> = StateProviderValueObject<STATE, ACTION, DISPATCH> & ProviderValueTuple<STATE, ACTION, DISPATCH>

declare export function useReducer<STATE, ACTION, DISPATCH: Async<void | STATE> | Sync<void | STATE> = Sync<void>>(
  id?: Id
): ProviderValue<STATE, ACTION, DISPATCH>

declare export function useReducerState<STATE>(id?: Id): STATE

declare export function useReducerDispatcher<ACTION, DISPATCH: Async<> | Sync<> = Sync<void>>(
  id?: Id
): Dispatcher<ACTION, DISPATCH>

declare export function useMapper<STATE, ACTION, DISPATCH: Async<void | STATE> | Sync<void | STATE> = Sync<void>>(
  id?: Id
): ProviderValue<STATE, ACTION, DISPATCH>

declare export function useMapperState<STATE>(id?: Id): STATE

declare export function useMapperDispatcher<ACTION, DISPATCH: Async<> | Sync<> = Sync<void>>(
  id?: Id
): Dispatcher<ACTION, DISPATCH>

declare export function injectReducer<INJECTED_PROP: {}, PROPS: {}>(
  ComponentClass: AbstractComponent<PROPS>, injectedPropName: $Keys<INJECTED_PROP>, id?: Id
): AbstractComponent<$Diff<PROPS, INJECTED_PROP>>

declare export function injectReducerState<INJECTED_PROP: {}, PROPS: {}>(
  ComponentClass: AbstractComponent<PROPS>, injectedPropName: $Keys<INJECTED_PROP>, id?: Id
): AbstractComponent<$Diff<PROPS, INJECTED_PROP>>

declare export function injectReducerDispatcher<INJECTED_PROP: {}, PROPS: {}>(
  ComponentClass: AbstractComponent<PROPS>, injectedPropName: $Keys<INJECTED_PROP>, id?: Id
): AbstractComponent<$Diff<PROPS, INJECTED_PROP>>

declare export function injectMapper<INJECTED_PROP: {}, PROPS: {}>(
  ComponentClass: AbstractComponent<PROPS>, injectedPropName: $Keys<INJECTED_PROP>, id?: Id
): AbstractComponent<$Diff<PROPS, INJECTED_PROP>>

declare export function injectMapperState<INJECTED_PROP: {}, PROPS: {}>(
  ComponentClass: AbstractComponent<PROPS>, injectedPropName: $Keys<INJECTED_PROP>, id?: Id
): AbstractComponent<$Diff<PROPS, INJECTED_PROP>>

declare export function injectMapperDispatcher<INJECTED_PROP: {}, PROPS: {}>(
  ComponentClass: AbstractComponent<PROPS>, injectedPropName: $Keys<INJECTED_PROP>, id?: Id
): AbstractComponent<$Diff<PROPS, INJECTED_PROP>>

// Actuator Consumption
///////////////////////

export type ActuatorProviderValue<ACTUATOR: Function = Function> = ACTUATOR & ProviderValueObject

declare export function useActuator<ACTUATOR: Function = Function> (
  id?: Id
): ActuatorProviderValue<ACTUATOR>

// Tagged Provider Component
////////////////////////////

export interface TaggedProviderProps {
  id?: Id;
  children: Node;
}

export type TaggedProcessor<PROCESSOR> = [ Id, PROCESSOR, any ] | [ Id, PROCESSOR ]

// Tagged Reducer Component Definition
//////////////////////////////////////

export interface TaggedReducerProps<REDUCER> extends TaggedProviderProps {
  /**
   * Must always be assigned, although can be 'null' or 'undefined'.
   */
  reducers: REDUCER[] | null | typeof(undefined)
}

export type SyncTaggedReducer = TaggedProcessor<SyncReducer<any, any>>

export interface SyncTaggedReducerProps extends TaggedReducerProps<SyncTaggedReducer> {}

declare export class SyncTaggedReducerProvider extends React.Component<SyncTaggedReducerProps> {}

export type AsyncTaggedReducer = TaggedProcessor<AsyncReducer<any, any>>

export interface AsyncTaggedReducerProps extends TaggedReducerProps<AsyncTaggedReducer> {}

declare export class AsyncTaggedReducerProvider extends React.Component<AsyncTaggedReducerProps> {}

// Tagged Mapper Component Definition
//////////////////////////////////////

export interface TaggedMapperProps<MAPPER> extends TaggedProviderProps {
  /**
   * Must always be assigned, although can be 'null' or 'undefined'.
   */
  mappers: MAPPER[] | null | typeof(undefined)
}

export type SyncTaggedMapper = TaggedProcessor<SyncMapper<any, any>>

export interface SyncTaggedMapperProps extends TaggedMapperProps<SyncTaggedMapper> {}

declare export class SyncTaggedMapperProvider extends React.Component<SyncTaggedMapperProps> {}

export type AsyncTaggedMapper = TaggedProcessor<AsyncMapper<any, any>>

export interface AsyncTaggedMapperProps extends TaggedMapperProps<AsyncTaggedMapper> {}

declare export class AsyncTaggedMapperProvider extends React.Component<AsyncTaggedMapperProps> {}

// Tagged Actuator Component Definition
///////////////////////////////////////

export interface TaggedActuatorProps<ACTUATORS: TaggedProcessor<Function>[] = TaggedProcessor<Function>[]> extends ProviderProps {
  /**
   * Must always be assigned, although can be 'null' or 'undefined'.
   */
  actuators: ACTUATORS | null | typeof(undefined)
}

declare export class TaggedActuatorProvider<ACTUATORS: TaggedProcessor<Function>[] = TaggedProcessor<Function>[]>
  extends React.Component<TaggedActuatorProps<ACTUATORS>> {}

// Tagged Consumption
/////////////////////

export interface TaggedProviderValueObject<
  STATE,
  ACTION,
  DISPATCH: Async<void | STATE> | Sync<void | STATE> = Sync<void>
> extends StateProviderValueObject<STATE, ACTION, DISPATCH> {
  +tag: Id;
}

export type TaggedProviderValueTuple<
  STATE,
  ACTION,
  DISPATCH: Async<void | STATE> | Sync<void | STATE> = Sync<void>
> = [STATE, Dispatcher<ACTION, DISPATCH>, Id, Id]

export type TaggedProviderValue<
  STATE,
  ACTION,
  DISPATCH: Async<void | STATE> | Sync<void | STATE> = Sync<void>
> = TaggedProviderValueObject<STATE, ACTION, DISPATCH> & TaggedProviderValueTuple<STATE, ACTION, DISPATCH>

export interface TaggedProviderGetter<
  ANY_ID: Id = Id,
  ANY_STATE = any,
  ANY_ACTION = any,
  ANY_DISPATCH: DispatcherResult<ANY_STATE> = Sync<void>
> {
  +get: (tag: ANY_ID) => TaggedProviderValue<ANY_STATE, ANY_ACTION, ANY_DISPATCH>
}

declare export function useTaggedAny<
  ANY_ID: Id = Id,
  ANY_STATE = any,
  ANY_ACTION = any,
  ANY_DISPATCH: DispatcherResult<ANY_STATE> = Sync<void>>(
  id?: Id
): TaggedProviderGetter<ANY_ID, ANY_STATE, ANY_ACTION, ANY_DISPATCH>

declare export function useTaggedReducer<STATE, ACTION, DISPATCH: Async<void | STATE> | Sync<void | STATE> = Sync<void>>(
  tag: Id, id?: Id
): TaggedProviderValue<STATE, ACTION, DISPATCH>

declare export function useTaggedReducerState<STATE>(tag: Id, id?: Id): STATE

declare export function useTaggedReducerDispatcher<ACTION, DISPATCH: Async<> | Sync<> = Sync<void>>(
  tag: Id, id?: Id
): Dispatcher<ACTION, DISPATCH>

declare export function useTaggedMapper<STATE, ACTION, DISPATCH: Async<void | STATE> | Sync<void | STATE> = Sync<void>>(
  tag: Id, id?: Id
): TaggedProviderValue<STATE, ACTION, DISPATCH>

declare export function useTaggedMapperState<STATE>(tag: Id, id?: Id): STATE

declare export function useTaggedMapperDispatcher<ACTION, DISPATCH: Async<> | Sync<> = Sync<void>>(
  tag: Id, id?: Id
): Dispatcher<ACTION, DISPATCH>

declare export function injectTaggedAny<INJECTED_PROP: {}, PROPS: {}>(
  ComponentClass: AbstractComponent<PROPS>, injectedPropName: $Keys<INJECTED_PROP>, id?: Id
): AbstractComponent<$Diff<PROPS, INJECTED_PROP>>

declare export function injectTaggedReducer<INJECTED_PROP: {}, PROPS: {}>(
  ComponentClass: AbstractComponent<PROPS>, injectedPropName: $Keys<INJECTED_PROP>, tag: Id, id?: Id
): AbstractComponent<$Diff<PROPS, INJECTED_PROP>>

declare export function injectTaggedReducerState<INJECTED_PROP: {}, PROPS: {}>(
  ComponentClass: AbstractComponent<PROPS>, injectedPropName: $Keys<INJECTED_PROP>, tag: Id, id?: Id
): AbstractComponent<$Diff<PROPS, INJECTED_PROP>>

declare export function injectTaggedReducerDispatcher<INJECTED_PROP: {}, PROPS: {}>(
  ComponentClass: AbstractComponent<PROPS>, injectedPropName: $Keys<INJECTED_PROP>, tag: Id, id?: Id
): AbstractComponent<$Diff<PROPS, INJECTED_PROP>>

declare export function injectTaggedMapper<INJECTED_PROP: {}, PROPS: {}>(
  ComponentClass: AbstractComponent<PROPS>, injectedPropName: $Keys<INJECTED_PROP>, tag: Id, id?: Id
): AbstractComponent<$Diff<PROPS, INJECTED_PROP>>

declare export function injectTaggedMapperState<INJECTED_PROP: {}, PROPS: {}>(
  ComponentClass: AbstractComponent<PROPS>, injectedPropName: $Keys<INJECTED_PROP>, tag: Id, id?: Id
): AbstractComponent<$Diff<PROPS, INJECTED_PROP>>

declare export function injectTaggedMapperDispatcher<INJECTED_PROP: {}, PROPS: {}>(
  ComponentClass: AbstractComponent<PROPS>, injectedPropName: $Keys<INJECTED_PROP>, tag: Id, id?: Id
): AbstractComponent<$Diff<PROPS, INJECTED_PROP>>

// Tagged Actuator Consumption
///////////////////////

declare export function useTaggedActuator<ACTUATOR: Function = Function> (
  tag: Id, id?: Id
): ActuatorProviderValue<ACTUATOR>

// Helpers
//////////

export interface AnyAsyncDispatcher<ACTION = any, DISPATCH: Async<> = Async<void>> {
  (value: ACTION, ...args: $ReadOnlyArray<any>): DISPATCH
}

export interface Action<TYPE, DATA = typeof undefined> {
  type: TYPE;
  data?: DATA;
}