// Copyright 2011 Mark Cavage, Inc.  All rights reserved.

const assert = require('assert-plus')

// var asn1 = require('asn1')

// var Protocol = require('../protocol')

/// --- Globals

// var Ber = asn1.Ber

/// --- API

function Control (options) {
  assert.optionalObject(options)
  options = options || {}
  assert.optionalString(options.type)
  assert.optionalBool(options.criticality)
  if (options.value) {
    assert.buffer(options.value)
  }

  this.type = options.type || ''
  this.criticality = options.critical || options.criticality || false
  this.value = options.value || null
}
Object.defineProperties(Control.prototype, {
  json: {
    get: function getJson () {
      const obj = {
        controlType: this.type,
        criticality: this.criticality,
        controlValue: this.value
      }
      return (typeof (this._json) === 'function' ? this._json(obj) : obj)
    }
  }
})

Control.prototype.toBer = function toBer (ber) {
  assert.ok(ber)

  ber.startSequence()
  ber.writeString(this.type || '')
  ber.writeBoolean(this.criticality)
  if (typeof (this._toBer) === 'function') {
    this._toBer(ber)
  } else {
    if (this.value) { ber.writeString(this.value) }
  }

  ber.endSequence()
}

Control.prototype.toString = function toString () {
  return this.json
}

/// --- Exports
module.exports = Control