/* It's easy to avoid mutating arrays using spread operators (const newArr = [...oldArray])
this is how to make sure you only overwrite new values to an object */

const defaultState = {
  user: 'CamperBot',
  status: 'offline',
  friends: '732,982',
  community: 'freeCodeCamp'
};

const immutableReducer = (state = defaultState, action) => {
  switch(action.type) {
    case 'ONLINE':
      // don't mutate state here or the tests will fail
      const updatedObj = Object.assign({}, state, {status: 'online'}); //creates new object, starting blank, the updating and overwriting with following objects. The updated status overrides the one of the current state because it follows it.
      return updatedObj;
    default:
      return state;
  }
};

const wakeUp = () => {
  return {
    type: 'ONLINE'
  }
};

const store = Redux.createStore(immutableReducer);