import React from 'react';
import dva, { connect } from 'dva';
import { Router, Route } from 'dva/router';

// 1. Initialize
const app = dva();

// 2. Model
app.model({
  namespace: 'count',
  state: 0,
  reducers: {
    ['count/add'  ](count) { return count + 1 },
    ['count/minus'](count) { return count - 1 },
  },
});

// 3. View
const App = connect(({ count }) => ({
  count
}))(function(props) {
  return (
    <div>
      <h2>{ props.count }</h2>
      <button key="add" onClick={() => { props.dispatch({type: 'count/add'})}}>+</button>
      <button key="minus" onClick={() => { props.dispatch({type: 'count/minus'})}}>-</button>
    </div>
  );
});

// 4. Router
app.router(({ history }) =>
  <Router history={history}>
    <Route path="/" component={App} />
  </Router>
);

// 5. Start
app.start(document.getElementById('root'));