const Printer = class Printer {
  constructor () {
    this._excelvan = require('node-excelvan')
    this._printer = new this._excelvan.Printer()
    this._printer.connect()
    this._printJob = new this._excelvan.PrintJob()
    this._pdf2png = require('pdf2png')

    this.endJob = this.endJob.bind(this)
  }

  print1 () {
    this._printJob.printImage('./tmp/cap.png', {dither: false}, (err, res) => {
      this._printer.print(res._queue)
    })
  }

  print (dataBuffer) {
    this._pdf2png.convert('./tmp/lorem.pdf', (res) => {
      if (res.error) {
        console.error(res.error)
      } else {
        this._printJob.printImage(res.data, {dither: false}, (err, res) => {
          if (err) {
            console.error(err)
          } else {
            this._printer.print(res._queue)
          }
        })
      }
    })
  }

  endJob () {
    this._printJob = new this._excelvan.PrintJob()
    const pj = new this._excelvan.PrintJob()
    pj.pad(5).cut()
    this._printer.disconnect(() =>
      setTimeout(() =>
        this._printer.connect(() =>
          this._printer.print(pj)
        )
      ), 5
    )
  }
}

module.exports = new Printer()