import React from 'react';
import ReactDOM from 'react-dom';
import { createStore, createModel } from '@ice/store';

const delay = (time) => new Promise((resolve) => setTimeout(() => resolve(), time));

// 1️⃣ 使用模型定义你的状态
const counter = createModel({
  state: 0,
  reducers: {
    increment:(prevState) => prevState + 1,
    decrement:(prevState) => prevState - 1,
  },
  effects: () => ({
    async asyncDecrement() {
      await delay(1000);
      this.decrement();
    },
  })
});

const models = {
  counter,
};

// 2️⃣ 创建 Store
const store = createStore(models);


// 3️⃣ 消费模型
const { useModel } = store;
function Counter() {
  const [ count, dispatchers ] = useModel('counter');
  const { increment, asyncDecrement } = dispatchers;
  return (
    <div>
      <span>{count}</span>
      <button type="button" onClick={increment}>+</button>
      <button type="button" onClick={asyncDecrement}>-</button>
    </div>
  );
}

// 4️⃣ 绑定视图
const { Provider } = store;
function App() {
  return (
    <Provider>
      <Counter />
    </Provider>
  );
}

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