import { WriteStream } from 'node:fs'
import { EventEmitter } from 'node:events'

export default class File extends EventEmitter {
  #stream = null

  size = 0
  path = null
  name = null
  type = null
  lastModifiedDate = null

  constructor(props = {}) {
    super()

    for (var key in props) {
      this[key] = props[key]
    }
  }

  open() {
    this.#stream = new WriteStream(this.path)
  }

  toJSON() {
    return {
      size: this.size,
      path: this.path,
      name: this.name,
      type: this.type,
      mtime: this.lastModifiedDate,
      length: this.length,
      filename: this.filename,
      mime: this.mime
    }
  }

  write(buffer, cb) {
    this.#stream.write(buffer, _ => {
      this.lastModifiedDate = new Date()
      this.size += buffer.length
      this.emit('progress', this.size)
      cb()
    })
  }

  end(cb) {
    this.#stream.end(() => {
      this.emit('end')
      cb()
    })
  }
}