const SerialPort = require('serialport')
const EventEmitter = require('events')

class DeviceObject extends EventEmitter {
  constructor (port, opts = {}) {
    super()
    this._port = port
    this._spOpts = opts
    this._sp = null
    this.isOpen = false
  }

  connect () {
    this._sp = new SerialPort(this._port, this._spOpts)
    this._sp.open(() => {
      this.isOpen = true
      this.emit('open')
    })
    this._sp.on('close', () => {
      this.isOpen = false
      this.emit('close')
    }).on('data', data => {
      this.emit('data', data)
    })
  }

  static async getPorts () {
    try {
      let list = SerialPort.list()
      return list
    } catch (err) {
      return null
    }
  }
}

module.exports = DeviceObject