/**
 * 一个简单到发指的 WebSocket 类
 * @author yutent<yutent.io@gmail.com>
 * @date 2023/01/17 17:32:51
 */
import { WebSocketServer } from 'ws'

class WebSocket {
  #ws = null // ws实例
  #queue = [] // 消息队列

  constructor(server) {
    if (server.listening) {
      let conn = new WebSocketServer({ server, path: '/ws-vue-live' })
      conn.on('connection', ws => {
        this.#ws = ws
        // ws.on('message', data => {
        //   console.log(data + '');
        // })
        while (this.#queue.length) {
          let msg = this.#queue.shift()
          this.send(msg)
        }
      })
    }
  }

  send(msg = {}) {
    if (this.#ws) {
      this.#ws.send(JSON.stringify(msg))
    } else {
      this.#queue.push(msg)
    }
  }
}

export default function (server) {
  return new WebSocket(server)
}