using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Collections;
using System.Net.Sockets;

namespace SogClient
{
    public class ConnectedClientSessionUpdate
    {
        //private List<ClientSession> m_needUpdateSession = new List<ClientSession>();
        private Dictionary<Socket, ClientSession> m_clientSockets = new Dictionary<Socket, ClientSession>();

        private List<Socket> m_readList = new List<Socket>();
        private List<Socket> m_writeList = new List<Socket>();
        private List<Socket> m_errorList = new List<Socket>();


        private Dictionary<WebSession, WebClientSession> m_webClientSession = new Dictionary<WebSession, WebClientSession>();
        private List<WebSession> m_webReadList = new List<WebSession>();
        private List<WebSession> m_webWriteList = new List<WebSession>();

        public void AddWebSessionToList(WebClientSession webClientSession)
        {
            if (webClientSession.m_webSession == null)
            {
                return;
            }
            m_webClientSession.Add(webClientSession.m_webSession, webClientSession);
        }

        public void AddToList(ClientSession client)
        {
            if(client.NetSessionObj.WorkSocket == null)
            {
                return;
            }

            m_clientSockets.Add(client.NetSessionObj.WorkSocket, client);
        }

        public void Update()
        {
            UpdateSocketSession();
            UpdateWebSession();
        }

        private void UpdateWebSession()
        {
            foreach (var pair in m_webClientSession)
            {
                WebSession webSession = pair.Key;
                WebClientSession webClientSession = pair.Value;
                if (webSession.IsClosed)
                {
                    continue;
                }
                if (webSession.IsHaveDataRead())
                {
                    m_webReadList.Add(webSession);
                }
                if (webSession.IsHaveDataSend())
                {
                    m_webWriteList.Add(webSession);
                }
                if (m_webReadList.Count >= 32 || m_webWriteList.Count >= 32)
                {
                    ProcessWebSession();
                }
            }
            if (m_webReadList.Count > 0 || m_webWriteList.Count > 0)
            {
                ProcessWebSession();
            }
            m_webClientSession.Clear();
        }

        private void ProcessWebSession()
        {
            foreach (WebSession webSession in m_webReadList)
            {
                m_webClientSession[webSession].ReceiveMessage();
            }
            m_webReadList.Clear();

            foreach (WebSession webSession in m_webWriteList)
            {
                webSession.TryCopySendBuffer();
            }
            m_webWriteList.Clear();
        }


        private void UpdateSocketSession()
        {
            m_readList.Clear();
            m_writeList.Clear();
            m_errorList.Clear();

            foreach (var pair in m_clientSockets)
            {
                Socket socket = pair.Key;
                ClientSession client = pair.Value;
                NetSession session = client.NetSessionObj;

                if (session.IsSocketClosed)
                {
                    //                    AddSocketToNeedClose(socket);
                    continue;
                }

                //写的优化
                session.CheckSocketAndSendKeepAlive();
                if (session.IsSocketClosed)
                {
                    //                    AddSocketToNeedClose(socket);
                    continue;
                }

                m_readList.Add(socket);
                if (session.IsHaveDataNeedSend())
                {
                    m_writeList.Add(socket);
                }
                m_errorList.Add(socket);


                if (m_readList.Count >= 32)
                {
                    Socket.Select(m_readList, m_writeList, m_errorList, 0);
                    process_select_result();
                }
            }

            if (m_readList.Count > 0)
            {
                Socket.Select(m_readList, m_writeList, m_errorList, 0);
                process_select_result();
            }

            m_clientSockets.Clear();
        }

        private void process_select_result()
        {
            //error
            foreach (Socket socket in m_errorList)
            {
                m_clientSockets[socket].OnUpdateConnectedSocketError();
            }
            m_errorList.Clear();

            //read
            foreach (Socket socket in m_readList)
            {
                m_clientSockets[socket].ReadSocketReadable();
            }
            m_readList.Clear();

            //write
            foreach (Socket socket in m_writeList)
            {
                m_clientSockets[socket].NetSessionObj.WriteWriteableSocket();
            }
            m_writeList.Clear();
        }
    }
}