const { createStore, applyMiddleware } = Redux;
const { Provider, connect } = ReactRedux
const thunk = ReduxThunk.default
const Increment = () =>{
  return function (dispatch){
    setTimeout(()=>{
      dispatch({type: 'INCREMENT'})
    },2000)
  }
  // return {
  //     type: 'INCREMENT'
  // }
}
class Counter extends React.Component {
  render() {
    console.log(this.props);
    return (
      <div>
        <h2>Counter</h2>
        <div>
          <button onClick={this.props.decrement}>-</button>
          <span>{this.props.count}</span>
          <button onClick={this.props.increment}>+</button>
        </div>
      </div>
    )
  }
}
const actionsCreators = (dispatch)=> {
  return{
    increment: () => {
      //store.dispatch({ type: 'INCREMENT' });
      dispatch(Increment())
    },
    decrement : () => {
      dispatch({ type: 'DECREMENT' });
    }
  }
}
function mapStateToProps(state) {
  console.log(state);

  return {
    count: state.count
  };
}

const Concounter = connect(mapStateToProps,actionsCreators)(Counter);

const initialState = {
  count: 0
};

function reducer(state = initialState, action) {
  switch(action.type) {
    case 'INCREMENT':
      return {
        count: state.count + 1
      };
    case 'DECREMENT':
      return {
        count: state.count - 1
      };
    default:
      return state;
  }
}

const store = createStore(reducer,window.devToolsExtension ? window.devToolsExtension() : undefined ,applyMiddleware(thunk));

const App = () => (
  <Provider store={store}>
    <Concounter/>
  </Provider>
);

ReactDOM.render(<App />, document.getElementById('root'));