import { encrypt } from 'romulus-js'
import { DEFAULT_KEY, MessageTypes } from '../common'
import { numberToUint16BE } from '../utilities/number'
import { packOutgoingPacket } from './packet'

const MESSAGE_TYPE = numberToUint16BE(MessageTypes.Basic)

export interface BasicMessage {
  data: Uint8Array
}

/**
 * Create an outgoing basic message (0x0001) packet.
 * @param message The plaintext message to send.
 * @param key The key to encrypt the data with.
 * @returns An encrypted outgoing basic message (0x0001) packet.
 */
export function packBasicMessage (message: Uint8Array, key: Uint8Array = DEFAULT_KEY): Uint8Array {
  const data = encrypt(message, MESSAGE_TYPE, key)
  return packOutgoingPacket({
    messageType: MESSAGE_TYPE,
    data: data
  })
}

/**
 * Unpack the data section of an incoming basic message (0x0001) message.
 * @param data The data section of an incoming basic message (0x0001) message.
 * @returns An encrypted unpacked basic message (0x0001) message.
 */
export function unpackBasicMessage (data: Uint8Array): Uint8Array {
  return data
}