import React from 'react'
import {connect} from 'react-redux';

function requireAuthentication(Component) {
 // 组件有已登陆的模块 直接返回 (防止从新渲染)
 if (Component.AuthenticatedComponent) {
  return Component.AuthenticatedComponent
 }

 // 创建验证组件
 class AuthenticatedComponent extends React.Component {
  static contextTypes = {
   router: React.PropTypes.object.isRequired,
  }

  state = {
   login: true,
  }

  componentWillMount() {
   this.checkAuth();
  }

  componentWillReceiveProps(nextProps) {
   this.checkAuth();
  }

  checkAuth() {

   // 判断登陆
   const token = this.props.token;
   const login = token ? token.login : null;


   // 未登陆重定向到登陆页面
   if (!login) {
    let redirect = this.props.location.pathname + this.props.location.search;
    this.context.router.push('/login?message=401&redirect_uri=' + encodeURIComponent(redirect));
    return;
   }

   this.setState({login});
  }

  render() {
   if (this.state.login) {
    return 
   }
   return ''
  }
 }

 // 不使用 react-redux 的话直接返回
 // Component.AuthenticatedComponent = AuthenticatedComponent
 // return Component.AuthenticatedComponent


 function mapStateToProps(state) {
  return {
   token: state.token,
  };
 }

 function mapDispatchToProps(dispatch) {
  return {};
 }
 Component.AuthenticatedComponent = connect(mapStateToProps, mapDispatchToProps)(AuthenticatedComponent);
 return Component.AuthenticatedComponent
}