/**
 * Entity store management module
 *
 * This module provides a Redux reducer and utility functions for managing
 * normalized entity data in a Redux store. It uses immutability-helper
 * to perform immutable updates on the entity state.
 */
import { Schema } from 'normalizr';
import { Spec } from 'immutability-helper';
import type { EntityAction, EntityStrategy } from './actions';
/**
 * Represents a single entity's state in the store
 * @typedef {Object} EntityState
 * @property {string|number} [key] - Entity identifier
 * @property {any} [value] - Entity data
 */
export type EntityState = Record<string, any>;
/**
 * Represents the structure of the entities state in the Redux store
 * @typedef {Object} EntitiesState
 * @property {EntityState} [entityType] - Map of entity types to their states
 */
export type EntitiesState = Record<string, Record<string, EntityState>>;
/**
 * Default empty state for the entities reducer
 * @type {EntitiesState}
 */
export declare const defaultState: EntitiesState;
/**
 * Initial state for the entities reducer
 * @type {EntitiesState}
 */
export declare const initialState: EntitiesState;
/**
 * Normalizes entity data using normalizr
 * @template T - The type of data to normalize
 * @param {T|T[]} data - The entity or array of entities to normalize
 * @param {Schema|string} entitySchema - The schema to use for normalization or entity name
 * @returns {EntitiesState} The normalized entities state
 */
export declare const normalizeEntities: <T>(data: T | T[], entitySchema: Schema | string) => EntitiesState;
/**
 * Creates an update statement for immutability-helper to merge normalized entities into state
 * @param {EntitiesState} state - Current entities state
 * @param {EntitiesState} normalizedEntities - Normalized entities to merge into state
 * @returns {Spec<EntitiesState>} An immutability-helper spec object for updating the state
 */
export declare const createUpdateStatement: (state: EntitiesState, normalizedEntities: EntitiesState) => Spec<EntitiesState>;
/**
 * Handles updating entities with different strategies
 * @param {EntitiesState} state - Current entities state
 * @param {EntityState} entities - Entities to update
 * @param {EntityStrategy} [strategy='$merge'] - Strategy to use for the update
 * @returns {Spec<EntitiesState>} An immutability-helper spec object for updating the state
 */
export declare const handleUpdateEntities: (state: EntitiesState, entities: EntityState, strategy?: EntityStrategy) => Spec<EntitiesState>;
/**
 * Creates a spec for deleting entities from the state
 * @param {EntitiesState} state - Current entities state
 * @param {EntitiesState} entities - Entities to delete
 * @returns {Spec<EntitiesState>} An immutability-helper spec object for deleting entities
 */
export declare const handleDeleteEntities: (state: EntitiesState, entities: EntitiesState) => Spec<EntitiesState>;
/**
 * Reducer function for the entities state
 * Handles various entity-related actions
 * @param {EntitiesState} [state=initialState] - Current entities state
 * @param {EntityAction} action - Action to process
 * @returns {EntitiesState} Updated entities state
 */
export declare function reducer(state: EntitiesState | undefined, action: EntityAction): EntitiesState;
/**
 * Extension of the immutability-helper Spec type that allows for indexable properties
 * Used for building dynamic update specs
 * @typedef {Object} IndexableSpec
 * @template T - The type of the spec
 */
export type IndexableSpec<T> = Spec<T> & {
    [key: string]: any;
};
export default reducer;