#pragma once 
#include <map>
#include <list>
#include "ITCPServer.h"
#include <list>

using namespace std;

//#define TCPIOCP_MANAGER _T("TcpServer监视")
#define UPDATE_ONE_DATA WM_USER + 1001
//#define ADD_TCPIOCP WM_USER + 1002
//#define ADD_CONNECT_TCPTOCP WM_USER + 1003
//#define UPDATE_ONE_DATA_JDSP_RECV WM_USER + 1004
//#define UPDATE_ONE_DATA_JDSP_SEND WM_USER + 1005



class CIOCP
{
public:
	//CIOCP构造函数
	CIOCP(int nMaxConcurrent = -1)
	{
		m_hIOCP = NULL;
		if (nMaxConcurrent != -1)
		{
			Create(nMaxConcurrent);
		}
	}
	//CIOCP析构函数
	~CIOCP()
	{
		if (m_hIOCP != NULL)
		{
			CloseHandle(m_hIOCP);
		}
	}

	//关闭IOCP
	BOOL Close()
	{
		BOOL bResult = CloseHandle(m_hIOCP);
		m_hIOCP = NULL;
		return bResult;
	}

	//创建IOCP， nMaxConcurrency指定最大线程并发数量， 0 默认为CPU核数
	bool Create(int nMaxConcurrency = 0)
	{
		m_hIOCP = CreateIoCompletionPort(INVALID_HANDLE_VALUE, NULL, 0, nMaxConcurrency);
		//ASSERT(m_hIOCP != NULL);
		return (m_hIOCP != NULL);
	}

	//为设备（文件，socket,邮件槽，管道等）关联一个IOCP
	bool AssociateDevice(HANDLE hDevice, ULONG_PTR Compkey)
	{
		bool fOk = (CreateIoCompletionPort(hDevice, m_hIOCP, Compkey, 0) == m_hIOCP);
		return fOk;
	}

	//为Socket关联一个IOCP
	bool AssociateSocket(SOCKET hSocket, ULONG_PTR CompKey)
	{
		return AssociateDevice((HANDLE)hSocket, CompKey);
	}

	//为IOCP传递事件通知
	bool PostStatus(ULONG_PTR CompKey, DWORD dwNumBytes = 0, OVERLAPPED* po = NULL)
	{
		bool fOk = PostQueuedCompletionStatus(m_hIOCP, dwNumBytes, CompKey, po);
		return fOk;
	}
	//从IO完成端口队列中获取事件通知， IO完成队列中没有事件时，该函数阻塞
	bool GetStatus(ULONG_PTR* pCompKey, PDWORD pdwNumBytes, OVERLAPPED** ppo, DWORD dwMillseconds = INFINITE)
	{
		return GetQueuedCompletionStatus(m_hIOCP, pdwNumBytes, pCompKey, ppo, dwMillseconds);
	}
	//获取IOCP对象
	const HANDLE GetIOCP()
	{
		return m_hIOCP;
	}

private:
	HANDLE m_hIOCP= INVALID_HANDLE_VALUE;   //IOCP句柄
};

/*
在IOCP编程模型中，需要用到GetQueuedCompletionStatus()函数获取已完成的事件
但是该函数的返回参数无 Socket或者buffer的描述信息

一个简单的方法是：创建一个新的结构，该结构第一个参数是OVERLAPPED
由于AcceptEx, WSASend 等重叠IO操作传入的是Overlapped结构体的地址，调用AcceptEx等重叠IO操作，在Overlapped结构体后面开辟新的空间
写入socket或者buffer的信息，即可将socket或者buffer的信息由GetQueuedComletionStatus带回
*/
#define MAXBUF 8*1024
enum IOOperType
{
	TYPE_ACP,					//accept事件到达，有新的连接请求
	TYPE_RECV,				   //数据接收事件
	TYPE_SEND,               //数据发送事件
	TYPE_CLOSE_SOCK,			//服务端主动关闭socket
	TYPE_CLOSE,             //关闭事件
	TYPE_NO_OPER
};

class COverlappedIOInfo : public OVERLAPPED
{
public:
	COverlappedIOInfo(void)
	{
		m_socket = INVALID_SOCKET;
		ResetOverlapped();
		ResetRecvBuffer();
		ResetSendBuffer();
	}
	~COverlappedIOInfo(void)
	{
		if (m_socket != INVALID_SOCKET)
		{
			closesocket(m_socket);
			m_socket = INVALID_SOCKET;
		}
	}

	void ResetOverlapped()
	{
		Internal = InternalHigh = 0;
		Offset = OffsetHigh = 0;
		hEvent = NULL;
	}
	void ResetRecvBuffer()
	{
		ZeroMemory(m_crecvBuf, MAXBUF);
		m_recvBuf.buf = m_crecvBuf;
		m_recvBuf.len = MAXBUF;
	}
	void ResetSendBuffer()
	{
		ZeroMemory(m_csendBuf, MAXBUF);
		m_sendBuf.buf = m_csendBuf;
		m_sendBuf.len = MAXBUF;
	}


public:
	SOCKET m_socket;		//套接字

							//接收缓冲区，用于AcceptEx, WSARecv操作
	WSABUF m_recvBuf;
	char m_crecvBuf[MAXBUF];

	//发送缓冲区， 用于WSASend操作
	WSABUF m_sendBuf;
	char m_csendBuf[MAXBUF];

	//对端地址
	BOOL bIPv6addr=FALSE;
	sockaddr_in m_addr;
	SOCKADDR_IN6 m_addr_IPv6;

	ClientInfo m_cltInfo;
};

//目的:防止断开连接后，其他地方还保留有连接信息。保留15分钟
struct CConnectCache
{
	std::shared_ptr<COverlappedIOInfo>	pConnInfo;		//连接信息
	DWORD								dwDisConnect;	//断开时间
};

#define HISTORY_CONN_STATIC_COUNT 500
//#define IN_WINDOWS 

typedef enum connDataWay {
	CONN_DATA_SEND = 0,
	CONN_DATA_RECV
}ConnDataWay;

typedef struct connDataNode {
	SYSTEMTIME time;
	ConnDataWay way; // 0 send. 1 recv.
	char* data;
	int iDataLen;
	connDataNode() {
		memset(&time, 0, sizeof(SYSTEMTIME));
		data = NULL;
		iDataLen = 0;
	}
	~connDataNode() {
		if (data) delete[]data;
	}
}ConnDataNode;

typedef struct connHistoryData {
	ConnDataNode dataBuffer[HISTORY_CONN_STATIC_COUNT];
	HANDLE m_mutex;
	int startIndex;
	int iLastIndex;
	int endIndex;
	bool bIsFull;

	connHistoryData() {
		startIndex = endIndex = iLastIndex = 0;
		bIsFull = false;
		m_mutex = CreateMutex(NULL, FALSE, NULL);
	}

	~connHistoryData() {
		if (m_mutex) {
			CloseHandle(m_mutex);
			m_mutex = NULL;
		}
	}

	bool isFull() {
		return bIsFull;
	}

	bool Lock() {
		if (m_mutex) {
			WaitForSingleObject(m_mutex, INFINITE);
			return true;
		}
		return false;
	}

	void Unlock() {
		if (m_mutex) ReleaseMutex(m_mutex);
	}

	void AddData(char* buf, int iLen, ConnDataWay way) {
		if (!Lock()) return;
		::GetLocalTime(&dataBuffer[endIndex].time);
		dataBuffer[endIndex].way = way;
		if (dataBuffer[endIndex].data) delete[]dataBuffer[endIndex].data;
		dataBuffer[endIndex].data = new char[iLen];
		if (!dataBuffer[endIndex].data) return;
		memcpy(dataBuffer[endIndex].data, buf, iLen);
		dataBuffer[endIndex].iDataLen = iLen;
		iLastIndex = endIndex;
		endIndex = (endIndex + 1) % HISTORY_CONN_STATIC_COUNT;
		if (bIsFull) startIndex = endIndex;
		else if (endIndex == startIndex) bIsFull = true;
		Unlock();
	}
}ConnHistoryData;


class TCPServerIOCP : public ITCPServer {
public:
	bool StartServer(ITcpServerCallBack* pUser, int iPort, CString strLocalIP = _T(""));
	bool StartServer_IPv6(ITcpServerCallBack* pUser, int iPort, CString strLocalIP = _T(""));
	void StopServer();

	BOOL SendData(const char* pData, int iLen, ClientInfo* pCltInfo);
	BOOL SendData(const char* pData, int iLen, CString strIP);
	BOOL SendData(const char* pData, int iLen, CString strIP, int port, SOCKET& sock);
	BOOL SendData(const char* pData, int iLen, SOCKET& sock);
	BOOL SendData(const char* pData, int iLen);
	ITcpServerCallBack* m_pCallBackUser = nullptr;
	ITcpServerCallBack* m_pCallBackUser_IPv6 = nullptr;

	BOOL m_bStarted;
	BOOL m_bStarted_IPv6;

	void Log(char* sz);
	void (*pLog)(char*);//日志接口

	std::function<void(int, CString, int, const void*, int, int, int)> m_callBackTcpLog;

	//获取IP列表
	virtual void GetIPList(std::vector<CString> &vec);
	virtual void GetConnectInfo(std::vector<ClientInfo *> &vec);
	virtual void GetHistoryConnectInfo(std::map<CString, ConnHistoryInfo *> &mapHis) 
	{
		mapHis.insert(m_mapConnHistory.begin(), m_mapConnHistory.end());
	}
	virtual ConnHistoryInfo *GetHistoryConnectInfo(const CString &strIP)
	{
		auto pFind = m_mapConnHistory.find(strIP);
		if (pFind != m_mapConnHistory.end()) {
			return pFind->second;

		}
		return NULL;
	}


private:
	//新连接绑定历史记录
	void BindHistoryData(COverlappedIOInfo* info, bool bRecv = false);
public:
	//构造函数
	TCPServerIOCP();
	//虚构函数
	~TCPServerIOCP();
	//开始监听
	bool StartListen(unsigned short port, string ip);
	bool StartListen_IPv6(unsigned short port, string ip);
	int CalcTimePassSecond(SYSTEMTIME* stLast, SYSTEMTIME* stNow = NULL);
	void ConnectionMaintain();
	/*
	释放3个部分步骤：
	1. 清空IOCP线程队列，退出线程
	2. 清空等待accept套接字m_vecAcps
	3. 清空已连接套接字m_vecContInfo并清空缓存
	*/
	void CloseServer();
	//私有成员函数

	//启动CPU*2个线程，返回已启动的线程个数
	int StartWorkThreadPool();
	int StartWorkThreadPool_IPv6();
	//处理accept请求，NumberOfBytes=0表示没有收到第一帧数据， >0时表示收到了第一帧数据
	bool DoAccept(SOCKET sockAccept, SOCKADDR_IN* ClientAddr);
	bool DoAccept_IPv6(SOCKET sockAccept, SOCKADDR_IN6* ClientAddr);
	//投递recv请求
	bool PostRecv(COverlappedIOInfo* info);
	//处理recv请求
	bool DoRecv(COverlappedIOInfo* info);
	//从已连接的socket列表中移除socket及释放空间
	bool DeleteLink(SOCKET s, char* strError);

	BOOL IsIPOnline(CString strIP);
	int StaticConnData(CString strIp, const char* data, int iLen, ConnDataWay way);

	virtual void ClearConnHistoryInfo();

	//winsock版本类型
	WSAData m_wsaData;

	//临时加一个黑名单地址 scz 
	ULONG m_blackaddr = 0;

	//端口监听套接字
	SOCKET m_sListen;
	SOCKET m_sListen_IPv6;
	//已建立连接的信息，每个结构含有一个套接字、发送缓冲区、接收缓冲区、对端地址
	vector<COverlappedIOInfo*> m_vecContInfo;
	//缓冲连接信息
	std::list<CConnectCache> m_listContInfo;
	CCriticalSection m_csCacheListLock;

	//操作vector的互斥访问锁
	CCriticalSection m_csClientVectorLock;
	//CIOCP封装类
	CIOCP m_iocp;
	CIOCP m_iocp_IPv6;
	//连接历史信息和状态信息
	std::map<CString, ConnHistoryInfo*> m_mapConnHistory;//暂时弃用，后续启用时记得加锁防止多线程并发访问。多线程操作会出现map有两个相同的key

	static void ListenThread_IOCPServer(LPVOID lpParam);
	static void ListenThread_IOCPServer_IPv6(LPVOID lpParam);
	CString m_strServerIP;
	int m_iServerPort;
	DWORD m_lastError;

	CString m_strServerIP_IPv6;
	int m_iServerPort_IPv6;
};