const createStore = (reducer)=>{

    //默认的state对象

    let state = {};

    //将所有订阅的事件存在在这个数组中

    let listeners = [];

    //默认的action

    let actionTypes = "@@redux/INIT";

    let Initaction = {

        type:actionTypes

    }

    const dispatch = (action=Initaction)=>{

        state = reducer(state,action);

        listeners.map(cb=>{

            cb();

        })

    }

    dispatch();

    const getState = ()=>state;

    const subscribe = (cb)=>{

        listeners.push(cb);

    }

    return {

        dispatch,

        getState,

        subscribe

    }

}

const combineReducers = (reducers)=>{

    const newState = {};

    return function(state,action){

        for(let key in reducers){

            let reduce = reducers[key];

            console.log(newState[key])

            newState[key] = reduce(state[key],action);

        }

        return newState;

    }

}

export {createStore,combineReducers}