const { inherits } = require('util')
const encoders = require('./encoders')
const decoders = require('./decoders')

module.exports.define = function define (name, body) {
  return new Entity(name, body)
}

function Entity (name, body) {
  this.name = name
  this.body = body

  this.decoders = {}
  this.encoders = {}
}

Entity.prototype._createNamed = function createNamed (Base) {
  const name = this.name

  function Generated (entity) {
    this._initNamed(entity, name)
  }
  inherits(Generated, Base)
  Generated.prototype._initNamed = function _initNamed (entity, name) {
    Base.call(this, entity, name)
  }

  return new Generated(this)
}

Entity.prototype._getDecoder = function _getDecoder (enc) {
  enc = enc || 'der'
  // Lazily create decoder
  if (!Object.prototype.hasOwnProperty.call(this.decoders, enc)) { this.decoders[enc] = this._createNamed(decoders[enc]) }
  return this.decoders[enc]
}

Entity.prototype.decode = function decode (data, enc, options) {
  return this._getDecoder(enc).decode(data, options)
}

Entity.prototype._getEncoder = function _getEncoder (enc) {
  enc = enc || 'der'
  // Lazily create encoder
  if (!Object.prototype.hasOwnProperty.call(this.encoders, enc)) { this.encoders[enc] = this._createNamed(encoders[enc]) }
  return this.encoders[enc]
}

Entity.prototype.encode = function encode (data, enc, /* internal */ reporter) {
  return this._getEncoder(enc).encode(data, reporter)
}