import { MAX_DATA_LENGTH } from '../common'
import { SmartBuffer } from '../smart-buffer'

export class IncomingPacket extends SmartBuffer {
  fields: {
    messageType: number
    senderId: number
    length: number
    data: Uint8Array
  }

  constructor (data: ArrayBuffer) {
    super()
    this.data = new Uint8Array(data)
    this.fields = {
      messageType: this.readUInt16(),
      senderId: this.readUInt32(),
      length: this.readUInt16(),
      data: this.readBytes(this.length)
    }
  }
}

export class OutgoingPacket extends SmartBuffer {
  constructor (messageType: number, data: Uint8Array = new Uint8Array(0)) {
    super()
    if (data.length > MAX_DATA_LENGTH) {
      throw RangeError(`Specified data of length ${data.length} exceeds max data length ${MAX_DATA_LENGTH}.`)
    }

    this.writeUInt16(messageType)
    this.writeUInt16(data.length)
    this.writeBytes(data)
  }
}