//create store

// import { createStore } from 'redux';

//save string values to vars

const ADD_TODO = 'ADD_TODO';

const UPDATE_TEXT = 'UPDATE_TEXT';

​

let nextId = 0;

//the action is whats performed to alter state

//addItem is an action creator and nees to return an action

//an object with a type property

export const AddToDo = (text) =>  {

  return {

    type: ADD_TODO,

    id: nextId++,

    text

  };

}

//action that updates input text

export const UpdateText = (text) => {

  return {

    type: UPDATE_TEXT,

    text

  };

}

​

//initial state of items and text

const initialState = {

  items: [],

  text: ''

}

//A pure function that takes the current/prev state

//and an action, and returns the next state

//Reducer controls the state, and is where state lives.

//Adds a new to do item

//state is initialstate

export const ToDoState = (state = initialState, action) => {

  //looks at the action type

  //returns current state plus the new state

  switch(action.type) {

    case ADD_TODO:

      //if add_todo action update items with item text

      state.items = state.items.concat({ id: action.id, text: action.text });

      console.log(state, action);

      return state;

  //returns state by default

    case UPDATE_TEXT:

      state.UpdateText = action.text;

      return state;

​

  default:

    return state;

  }

}

​