using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using DotNetty.Transport.Bootstrapping;
using DotNetty.Transport.Channels;
using DotNetty.Buffers;


namespace nettyCommunication
{
    public class Communication:ICommunication
    {

        private IChannelHandlerContext ctx = null;

        public Communication(IChannelHandlerContext ctx)
        {


            this.ctx = ctx;
        }

        public void Connection()
        {
            //连接，并注册初始化。
            try
            {
                ClientDemo.RunClientAsync().Wait();
            }
            catch (Exception)
            {
                Console.WriteLine("服务没有开启,请检查服务器");
            }
        }

        public void  SendMessage(object message)
        {

            var mess = message as MessageUTF8;
            IByteBuffer initialMessage = Unpooled.Buffer(ClientSettings.Size);            
            byte[] byteMessage = JsonByByteToObjectTools.ObjToJsonByte(mess);
            initialMessage.WriteBytes(byteMessage);
            ctx.WriteAndFlushAsync(initialMessage);

        }

    
        public AbstractMessage ReceiveMessage(object message)
        {
            try
            {
                AbstractMessage msg = null;
                IByteBuffer byteBuffer = message as IByteBuffer;
                byteBuffer.AdjustCapacity(1024);
                byteBuffer.SetWriterIndex(256);
                byte[] bytes = new byte[256];
                byteBuffer.SetReaderIndex(0);
                byteBuffer.ReadBytes(bytes);
                byteBuffer.Clear();
                MessageUTF8 mess = (MessageUTF8)JsonByByteToObjectTools.JsonByteToObj<MessageUTF8>(bytes);
                if (mess != null)
                {
                    msg = mess;
                }
                else
                {
                    msg = null;
                }
                return msg;
            }
            catch(Exception)
            {
                Console.WriteLine("消息对象转换存在问题，可能是服务器没有发送消息对象！");
                return null;
            }
           
        }

        public void Close()
        {
            throw new NotImplementedException();
        }
    }
}