text: const BitFlags = require('./bitflags')
  const Reliability = require('./reliability')
  const BinaryStream = require('jsbinaryutils')
  
  'use strict'
  
  class EncapsulatedPacket {
  
      // Decoded Encapsulated content
      #buffer
  
      // Encapsulation decoded fields
      #reliability
  
      #messageIndex
      #sequenceIndex
      #orderIndex
      #orderChannel
      
      #split
      // If packet is not splitted all those
      // fields remains undefined
      #splitCount
      #splitIndex
      #splitID
  
      needACK = false
      identifierACK
  
      static fromBinary(stream) {
          let packet = new EncapsulatedPacket()
          let header = stream.readByte()
          packet.reliability = (header & 224) >> 5
          packet.split = (header & BitFlags.Split) > 0
  
          let length = stream.readShort()
          length >>= 3  
          if (length == 0) {
              throw new Error('Got an empty encapsulated packet')
          }
  
          if (Reliability.reliable(packet.reliability)) {
              packet.messageIndex = stream.readLTriad()
          }
  
          if (Reliability.sequenced(packet.reliability)) {
              packet.sequenceIndex = stream.readLTriad()
          }
  
          if (Reliability.sequencedOrOrdered(packet.reliability)) {
              packet.orderIndex = stream.readLTriad()
              packet.orderChannel = stream.readByte()
          }
  
          if (packet.split) {
              packet.splitCount = stream.readInt()
              packet.splitID = stream.readShort()
              packet.splitIndex = stream.readInt()
          }
  
          packet.buffer = stream.buffer.slice(stream.offset)
          stream.offset += length
  
          return packet
      }
  
      toBinary() {
          let stream = new BinaryStream()
          let header = this.#reliability << 5
          if (this.#split) {
              header |= BitFlags.Split
          }
          stream.writeByte(header)
          stream.writeShort(this.#buffer.length << 3)
  
          if (Reliability.reliable(this.#reliability)) {
              stream.writeLTriad(this.messageIndex)
          }
  
          if (Reliability.sequenced(this.#reliability)) {
              stream.writeLTriad(this.#sequenceIndex)
          }
  
          if (Reliability.sequencedOrOrdered(this.#reliability)) {
              stream.writeLTriad(this.#orderIndex)
              stream.writeByte(this.#orderChannel)
          }
  
          if (this.#split) {
              stream.writeInt(this.#splitCount)
              stream.writeShort(this.#splitID)
              stream.writeInt(this.#splitIndex)
          }
  
          stream.append(this.buffer)
          return stream
      }
  
      getTotalLength() {
          return 3 + this.buffer.length + 
          (typeof this.messageIndex !== 'undefined' ? 3 : 0) + 
          (typeof this.orderIndex !== 'undefined' ? 4 : 0) + 
          (this.split ? 10 : 0)
      }
  
      get buffer() {
          return this.#buffer
      }
  
      set buffer(buffer) {
          return this.#buffer = buffer
      }
  
      get reliability() {
          return this.#reliability
      }
  
      set reliability(reliability) {
          this.#reliability = reliability
      } 
  
      get messageIndex() {
          return this.#messageIndex
      }
  
      set messageIndex(messageIndex) {
          this.#messageIndex = messageIndex
      }
  
      get sequenceIndex() {
          return this.#sequenceIndex
      }
  
      set sequenceIndex(sequenceIndex) {
          this.sequenceIndex = sequenceIndex
      }
  
      get orderIndex()  {
          return this.#orderIndex
      }
  
      set orderIndex(orderIndex) {
          this.#orderIndex = orderIndex
      }
  
      get orderChannel() {
          return this.#orderChannel
      }
  
      set orderChannel(orderChannel) {
          this.#orderChannel = orderChannel
      }
  
      get split() {
          return this.#split
      }
  
      set split(split) {
          this.#split = split
      }
  
      get splitCount() {
          return this.#splitCount
      }
  
      set splitCount(splitCount) {
          this.#splitCount = splitCount
      }
  
      get splitIndex() {
          return this.#splitIndex
      }
  
      set splitIndex(splitIndex) {
          this.#splitIndex = splitIndex
      }
  
      get splitID() {
          return this.#splitID
      }
  
      set splitID(splitID) {
          this.#splitID = splitID
      }
  }
  module.exports = EncapsulatedPacket