const event = require('events');
const serviceMap = require('./serviceMap');
const { auth } = require('./middleware');
// const Provider = require('../common/Provider')
class ServiceManager extends event {
    constructor(props = {}) {
        mylog.info('初始化服务控制器...');
        super(props);
        this._map = serviceMap;
        this.middleWares = [
            auth
        ];
    }
    static getInstance() {
        if(!ServiceManager.instance) {
            ServiceManager.instance = new ServiceManager();
        }
        return ServiceManager.instance;
    }

    get ServiceMap() {
        return this._map;
    }
    /**
     *
     * @desc 注册一个服务
     * @param {*} [service={}]
     * @param {String} path // 路由地址
     * @param {String} type // HTTP请求类型['GET','POST','PUT'...] 
     * @param {Function} handler //处理函数
     * @memberof ServiceManager
     */
    regist(service = {}) {
        const { version, ...main } = service;
        this._map[version].push(main);
    }

    mountService(route, version) {
        mylog.info('开始挂载中间价...');
        this.middleWares.map(fn => {
            route.use(fn);
        });
        mylog.info('开始挂载服务...');
        if (this.ServiceMap[version] &&  this.ServiceMap[version].length !== 0) {
            this.ServiceMap[version].map(service => {
                route[service.method.toLowerCase()](service.url, service.controller);
            });
        }
        return route;
    }
}

module.exports = ServiceManager.getInstance();