import { modifyPath, mergeDeepRight } from "ramda";

const STORAGE_KEY = "ecoplanet";

const defaultState = {
  dateCache: undefined,
  options: {
    lineWidth: undefined,
    defaultDate: undefined,
  },
};

const stringifyState = function (state) {
  return JSON.stringify(state);
};

const parseState = function (jsonString) {
  const state = JSON.parse(jsonString);
  return modifyPath(["options", "defaultDate"], Date.parse, state);
};

export const persistStorage = function (state) {
  localStorage.setItem(STORAGE_KEY, stringifyState(state));
};

export const loadStorage = function () {
  const storageStateString = localStorage.getItem(STORAGE_KEY);

  if (storageStateString) {
    return parseState(storageStateString);
  }
};

export const loadStorageOrDefault = function (state) {
  return mergeDeepRight(loadStorage(), defaultState);
};