using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using STcpHelper.Packet;

namespace STcpHelper.Utility
{
    internal class SBufferHelper
    {
        public static byte[] GetBuffer(int size, params byte[][] args)
        {
            byte[] bytes = new byte[size];
            int cursor = 0;

            for (int i = 0; i < args.Length; i++)
            {
                byte[] data = args[i];

                Array.Copy(data, 0, bytes, cursor, data.Length);
                cursor += data.Length;
            }

            return bytes;
        }

        public static byte[] ConvertPacketTypeToBuffer(PacketType packetType)
        {
            return BitConverter.GetBytes(IPAddress.HostToNetworkOrder((int)packetType));
        }

        public static byte[] ConvertDataLengthToBuffer(int dataLength)
        {
            return BitConverter.GetBytes(IPAddress.HostToNetworkOrder(dataLength));
        }

        public static int ConvertBufferToDataLength(byte[] dataBuffer, int cursor)
        {
            return IPAddress.NetworkToHostOrder(BitConverter.ToInt32(dataBuffer, cursor));
        }
    }
}