/**
 * notion-enhancer: api
 * (c) 2021 dragonwocky <thedragonring.bod@gmail.com> (https://dragonwocky.me/)
 * (https://notion-enhancer.github.io/) under the MIT license
 */

'use strict';

/**
 * environment-specific data persistence
 * @namespace storage
 */

import * as storage from '../env/storage.mjs';

/**
 * get persisted data
 * @type {function}
 * @param {string[]} path - the path of keys to the value being fetched
 * @param {unknown=} fallback - a default value if the path is not matched
 * @returns {Promise} value ?? fallback
 */
export const get = storage.get;

/**
 * persist data
 * @type {function}
 * @param {string[]} path - the path of keys to the value being set
 * @param {unknown} value - the data to save
 * @returns {Promise} resolves when data has been saved
 */
export const set = storage.set;

/**
 * create a wrapper for accessing a partition of the storage
 * @type {function}
 * @param {string[]} namespace - the path of keys to prefix all storage requests with
 * @param {function=} get - the storage get function to be wrapped
 * @param {function=} set - the storage set function to be wrapped
 * @returns {object} an object with the wrapped get/set functions
 */
export const db = storage.db;

/**
 * add an event listener for changes in storage
 * @type {function}
 * @param {onStorageChangeCallback} callback - called whenever a change in
 * storage is initiated from the current process
 */
export const addChangeListener = storage.addChangeListener;

/**
 * remove a listener added with storage.addChangeListener
 * @type {function}
 * @param {onStorageChangeCallback} callback
 */
export const removeChangeListener = storage.removeChangeListener;

/**
 * @callback onStorageChangeCallback
 * @param {object} event
 * @param {string} event.path- the path of keys to the changed value
 * @param {string=} event.new - the new value being persisted to the store
 * @param {string=} event.old - the previous value associated with the key
 */