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import { configureStore } from "@reduxjs/toolkit";
import { LocalStorage } from "../services/LocalStorage.service";
import authReducer from "./auth/auth.slice";
import todosReducer from "./todos/todos.slice";
import usersReducer from "./users/users.slice";

const reducer = {
  auth: authReducer,
  todos: todosReducer,
  users: usersReducer,
};

const todosMiddleware = (store) => (next) => (action) => {
  const { type } = action;
  const result = next(action);

  switch (type) {
    case "auth/login":
      const authState = store.getState().auth;
      LocalStorage.set("todoUser", authState.currentUser);
      break;
    case "auth/logout":
      LocalStorage.remove("todoUser");
      break;
    case "todos/updateTodo":
      const todosState = store.getState().todos;
      LocalStorage.set("todoList", todosState);
      break;
    default:
      break;
  }

  return result;
};

const userFromLocalStorage = LocalStorage.get("todoUser");
const preloadedAuth = userFromLocalStorage
  ? { isAuthenticated: true, currentUser: userFromLocalStorage }
  : undefined;

const todosFromLocalStorage = LocalStorage.get("todoList");
const preloadedTodos = todosFromLocalStorage
  ? todosFromLocalStorage
  : undefined;

const preloadedState = {
  auth: preloadedAuth,
  todos: preloadedTodos,
};

export default configureStore({
  reducer,
  middleware: (getDefaultMiddleware) =>
    getDefaultMiddleware().concat(todosMiddleware),
  preloadedState,
});