const defaultState = {
  authenticated: false
};

const authReducer = (state = defaultState, action) => { //state is set to the default object using ES6 syntax.  It's accepting the state, and the action.
  // change code below this line
  switch (action.type) { //switches on the values of the action that the reducer is accepting. Changes the state based on the result.
    case 'LOGIN':
      return {authenticated:true};
      break;
    case 'LOGOUT':
      return {authenticated:false};
      break;
    default:
      return state;
      break;
  }
  // change code above this line
};

const store = Redux.createStore(authReducer); //passing the reducer into the createStore is telling the store what function is used to update the state.

const loginUser = () => {
  return {
    type: 'LOGIN'
  }
};

const logoutUser = () => {
  return {
    type: 'LOGOUT'
  }
};