import { Action, ActionWithPayload } from "../action/types";

export interface Mutation<S = any> {
  (state: S, action: Action, key?: string | number, parent?: any): S | void;
}

export interface MutationWithPayload<S = any, P = any> {
  (
    state: S,
    action: ActionWithPayload<P>,
    key?: string | number,
    parent?: any
  ): S | void;
}

export type MutatorsObj = {
  [propName: string]: Mutation;
};

export type MutatorsReturnObject<TMutatorsObj extends MutatorsObj> = {
  [P in keyof TMutatorsObj]: ReturnType<TMutatorsObj[P]>;
};

export type MutatorInterface<S = any> = {
  mutate: Mutation<S>;
  createState: () => S;
};