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#include <winsock2.h>
#include <gdiplus.h>
#include <afxwin.h> 

using namespace Gdiplus;


class Socket
{
private:
	WSADATA m_wsaData;
	SOCKET m_sock;
	sockaddr_in m_serverAddr;

public:
	Socket() : m_sock(INVALID_SOCKET) {}
    
    bool Init()
    {
        if (WSAStartup(MAKEWORD(2, 2), &m_wsaData) != 0)
        {
            return false;
        }
        return true;
    }

    
    bool Create(int af, int type, int protocol)
    {
        m_sock = socket(af, type, protocol);
        if (m_sock == INVALID_SOCKET)
        {
            return false;
        }
        return true;
    }

    
    bool Connect(const char* ip, unsigned short port)
    {
        m_serverAddr.sin_family = AF_INET;
        m_serverAddr.sin_port = htons(port);
        m_serverAddr.sin_addr.S_un.S_addr = inet_addr(ip);
        if (connect(m_sock, (sockaddr*)&m_serverAddr, sizeof(m_serverAddr)) == SOCKET_ERROR)
        {
            return false;
        }
        return true;
    }

    
    int Send(const char* buf, int len)
    {
        return send(m_sock, buf, len, 0);
    }

    
    int Receive(char* buf, int len)
    {
        return recv(m_sock, buf, len, 0);
    }

    
    void Close()
    {
        closesocket(m_sock);
        m_sock = INVALID_SOCKET;
    }

    
    void Cleanup()
    {
        WSACleanup();
    }
};


class RemoteDesktop
{
private:
    Socket m_socket; 
    Image* m_image; 

public:
    RemoteDesktop() : m_image(NULL) {}
    
    bool Connect(const char* ip, unsigned short port)
    {
        if (!m_socket.Init())
        {
            return false;
        }
        if (!m_socket.Create(AF_INET, SOCK_STREAM, IPPROTO_TCP))
        {
            return false;
        }
        if (!m_socket.Connect(ip, port))
        {
            return false;
        }
        return true;
    }
    
    void Disconnect()
    {
        m_socket.Close();
        m_socket.Cleanup();
        delete m_image;
        m_image = NULL;
    }

    
    bool GetScreenshot()
    {
        
        const char* cmd = "screenshot";
        m_socket.Send(cmd, strlen(cmd));

        
        int size;
        m_socket.Receive((char*)&size, sizeof(size));

        
        char* data = new char[size];

        
        int bytesReceived = 0;
        while (bytesReceived < size)
        {
            int count = m_socket.Receive(data + bytesReceived, size - bytesReceived);
            if (count <= 0)
            {
                delete[] data;
                return false;
            }
            bytesReceived += count;
        }

        
        delete m_image;
        m_image = new Image(data, size);
        delete[] data;

        return true;
    }

    
    Image* GetImage() const
    {
        return m_image;
    }

    
    void MoveMouse(int x, int y)
    {
        
        const char* cmd = "mouse move";
        m_socket.Send(cmd, strlen(cmd));
        m_socket.Send((char*)&x, sizeof(x));
        m_socket.Send((char*)&y, sizeof(y));
    }

    
    void ClickMouse(int x, int y)
    {
        
        const char* cmd = "mouse click";
        m_socket.Send(cmd, strlen(cmd));
        m_socket.Send((char*)&x, sizeof(x));
        m_socket.Send((char*)&y, sizeof(y));
    }

    
    void InputKey(int keyCode)
    {
        
        const char* cmd = "key input";
        m_socket.Send(cmd, strlen(cmd));
        m_socket.Send((char*)&keyCode, sizeof(keyCode));
    }
};


class RemoteDesktopDialog : public CDialog
{
private:
    RemoteDesktop m_rd; 

public:
    
    RemoteDesktopDialog() : CDialog(IDD_DIALOG1) {}

protected:
    virtual void DoDataExchange(CDataExchange* pDX)
    {
        CDialog::DoDataExchange(pDX);
    }

public:
    
    bool Connect(const char* ip, unsigned short port)
    {
        return m_rd.Connect(ip, port);
    }

    
    void Disconnect()
    {
        m_rd.Disconnect();
    }
protected:
    
    afx_msg void OnPaint()
    {
        CPaintDC dc(this); 
        CRect rect;
        GetClientRect(&rect); 
            
        Image* image = m_rd.GetImage();
        if (image != NULL)
        {
            Graphics graphics(dc);
            graphics.DrawImage(image, rect);
        }
    }

    
    afx_msg void OnMouseMove(UINT nFlags, CPoint point)
    {
        m_rd.MoveMouse(point.x, point.y);
    }
    
    afx_msg void OnLButtonDown(UINT nFlags, CPoint point)
    {
        m_rd.ClickMouse(point.x, point.y);
    }

    
    afx_msg void OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags)
    {
        m_rd.InputKey(nChar);
    }
    DECLARE_MESSAGE_MAP()
};

BEGIN_MESSAGE_MAP(RemoteDesktopDialog, CDialog)
    ON_WM_PAINT()
    ON_WM_MOUSEMOVE()
    ON_WM_LBUTTONDOWN()
    ON_WM_KEYDOWN()
END_MESSAGE_MAP()

int main()
{
    
    GdiplusStartupInput gdiplusStartupInput;
    ULONG_PTR gdiplusToken;
    GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);
    
    RemoteDesktopDialog dlg;
    dlg.DoModal();

    
    GdiplusShutdown(gdiplusToken);
    return 0;
}

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#include <Windows.h>
#include <GdiPlus.h>
#include <winsock2.h>
#include<iostream>
#pragma comment(lib, "gdiplus.lib")
#pragma comment(lib, "ws2_32.lib")
using namespace std;
using namespace Gdiplus;


class Socket
{
private:
	WSADATA m_wsaData;
	SOCKET m_sock;
	sockaddr_in m_serverAddr;
	sockaddr_in m_clientAddr;

public:
	Socket() : m_sock(INVALID_SOCKET) {}
    
    bool Init()
    {
        if (WSAStartup(MAKEWORD(2, 2), &m_wsaData) != 0)
        {
            return false;
        }
        return true;
    }

    
    bool Create(int af, int type, int protocol)
    {
        m_sock = socket(af, type, protocol);
        if (m_sock == INVALID_SOCKET)
        {
            return false;
        }
        return true;
    }
    
    bool Bind(unsigned short port)
    {
        memset(&m_serverAddr, 0, sizeof(m_serverAddr));
        m_serverAddr.sin_family = AF_INET;
        m_serverAddr.sin_addr.s_addr = htonl(INADDR_ANY);
        m_serverAddr.sin_port = htons(port);
        if (bind(m_sock, (sockaddr*)&m_serverAddr, sizeof(m_serverAddr)) == SOCKET_ERROR)
        {
            return false;
        }
        return true;
    }
    
    bool Listen(int backlog)
    {
        if (listen(m_sock, backlog) == SOCKET_ERROR)
        {
            return false;
        }
        return true;
    }

    
    bool Accept(Socket& client)
    {
        int addrLen = sizeof(m_clientAddr);
        client.m_sock = accept(m_sock, (sockaddr*)&m_clientAddr, &addrLen);
        if (client.m_sock == INVALID_SOCKET)
        {
            return false;
        }
        return true;
    }

    
    int Receive(char* buffer, int len)
    {
        return recv(m_sock, buffer, len, 0);
    }

    
    int Send(const char* buffer, int len)
    {
        return send(m_sock, buffer, len, 0);
    }

    
    void Close()
    {
        closesocket(m_sock);
        m_sock = INVALID_SOCKET;
    }

    
    void Cleanup()
    {
        WSACleanup();
    }
};


class RemoteDesktopServer
{
private:
    Socket m_socket; 

public:
    
    bool Init(unsigned short port)
    {
        if (!m_socket.Init())
        {
            return false;
        }
        if (!m_socket.Create(AF_INET, SOCK_STREAM, IPPROTO_TCP))
        {
            return false;
        }
        if (!m_socket.Bind(port))
        {
            return false;
        }
        if (!m_socket.Listen(10))
        {
            return false;
        }
        return true;
    }
    
    void Run()
    {
        
        while (true)
        {
            Socket client;
            if (!m_socket.Accept(client))
            {
                continue;
            }

            
            HANDLE hThread = CreateThread(NULL, 0, ClientThreadProc, &client, 0, NULL);
            if (hThread == NULL)
            {
                client.Close();
                continue;
            }
            CloseHandle(hThread);
        }
    }
private:
    
    static DWORD WINAPI ClientThreadProc(LPVOID lpParam)
    {
        Socket* pClient = (Socket*)lpParam;
        
        while (true)
        {
            
            char cmd[256];
            int len = pClient->Receive(cmd, sizeof(cmd));
            if (len <= 0)
            {
                break;
            }

            
            if (strcmp(cmd, "screenshot") == 0)
            {
                
                HandleScreenshotRequest(*pClient);
            }
            else if (strcmp(cmd, "mouse move") == 0)
            {
                
                int x, y;
                pClient->Receive((char*)&x, sizeof(x));
                pClient->Receive((char*)&y, sizeof(y));
                HandleMouseMoveRequest(x, y);
            }
            else if (strcmp(cmd, "mouse click") == 0)
            {
                
                int x, y;
                pClient->Receive((char*)&x, sizeof(x));
                pClient->Receive((char*)&y, sizeof(y));
                HandleMouseClickRequest(x, y);
            }
            else if (strcmp(cmd, "key input") == 0)
            {
                
                char key;
                pClient->Receive(&key, sizeof(key));
                HandleKeyInputRequest(key);
            }
            else
            {
                break;
            }
        }
        
        pClient->Close();
        delete pClient;
        return 0;
    }

    
    static void HandleScreenshotRequest(Socket& client)
    {
        
        int width = GetSystemMetrics(SM_CXSCREEN);
        int height = GetSystemMetrics(SM_CYSCREEN);

        
        HDC hdcMem = CreateCompatibleDC(NULL);
        if (hdcMem == NULL)
        {
            return;
        }

        
        HBITMAP hbm = CreateCompatibleBitmap(GetDC(NULL), width, height);
        if (hbm == NULL)
        {
            DeleteDC(hdcMem);
            return;
        }

        
        HBITMAP hbmOld = (HBITMAP)SelectObject(hdcMem, hbm);
        if (hbmOld == NULL)
        {
            DeleteObject(hbm);
            DeleteDC(hdcMem);
            return;
        }

        
        if (!BitBlt(hdcMem, 0, 0, width, height, GetDC(NULL), 0, 0, SRCCOPY))
        {
            SelectObject(hdcMem, hbmOld);
            DeleteObject(hbm);
            DeleteDC(hdcMem);
            return;
        }

        
        BITMAPINFOHEADER bih;
        memset(&bih, 0, sizeof(bih));
        bih.biSize = sizeof(bih);
        bih.biWidth = width;
        bih.biHeight = -height;
        bih.biPlanes = 1;
        bih.biBitCount = 24;
        bih.biCompression = BI_RGB;
        BYTE* pBuf = NULL;
        HBITMAP hbmDib = CreateDIBSection(hdcMem, (BITMAPINFO*)&bih, DIB_RGB_COLORS, (void**)&pBuf, NULL, 0);
        if (hbmDib == NULL)
        {
            SelectObject(hdcMem, hbmOld);
            DeleteObject(hbm);
            DeleteDC(hdcMem);
            return;
        }
        
        if (!SelectObject(hdcMem, hbmDib))
        {
            DeleteObject(hbmDib);
            SelectObject(hdcMem, hbmOld);
            DeleteObject(hbm);
            DeleteDC(hdcMem);
            return;
        }
        
        if (!SendScreenshot(client, pBuf, width, height))
        {
            DeleteObject(hbmDib);
            SelectObject(hdcMem, hbmOld);
            DeleteObject(hbm);
            DeleteDC(hdcMem);
            return;
        }

        
        DeleteObject(hbmDib);
        SelectObject(hdcMem, hbmOld);
        DeleteObject(hbm);
        DeleteDC(hdcMem);
    }

    
    static bool SendScreenshot(Socket& client, BYTE* pBuf, int width, int height)
    {
        
        GdiplusStartupInput gdiplusStartupInput;
        ULONG_PTR gdiplusToken;
        GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);

        
        Bitmap bmp(width, height, width * 3, PixelFormat24bppRGB, pBuf);
        CLSID clsid;
        GetEncoderClsid(L"image/jpeg", &clsid);
        IStream* pStream = NULL;
        bmp.Save(L"screenshot.jpg", &clsid, NULL);
        if (CreateStreamOnHGlobal(NULL, TRUE, &pStream) != S_OK)
        {
            GdiplusShutdown(gdiplusToken);
            return false;
        }
        bmp.Save(pStream, &clsid, NULL);
        HGLOBAL hGlobal = NULL; 
        if (GetHGlobalFromStream(pStream, &hGlobal) != S_OK) 
        {
            pStream->Release();
            GdiplusShutdown(gdiplusToken);
            return false;
        }
        ULONG cbSize = GlobalSize(hGlobal); 
        BYTE* pJpegBuf = (BYTE*)GlobalLock(hGlobal); 
        if (pJpegBuf == NULL)
        {
            pStream->Release();
            GdiplusShutdown(gdiplusToken);
            return false;
        }
        LARGE_INTEGER li;
        li.QuadPart = 0;
        if (pStream->Seek(li, STREAM_SEEK_SET, NULL) != S_OK)
        {
            GlobalFree(pJpegBuf);
            pStream->Release();
            GdiplusShutdown(gdiplusToken);
            return false;
        }
        if (pStream->Read(pJpegBuf, cbSize, NULL) != S_OK)
        {
            GlobalFree(pJpegBuf);
            pStream->Release();
            GdiplusShutdown(gdiplusToken);
            return false;
        }
        pStream->Release();
        GdiplusShutdown(gdiplusToken);
        
        if (client.Send((char*)&cbSize, sizeof(cbSize)) <= 0)
        {
            GlobalFree(pJpegBuf);
            return false;
        }

        
        if (client.Send((char*)pJpegBuf, cbSize) <= 0)
        {
            GlobalFree(pJpegBuf);
            return false;
        }

        
        GlobalFree(pJpegBuf);
        return true;
    }

    
    static void GetEncoderClsid(const WCHAR* format, CLSID* pClsid)
    {
        UINT num = 0, size = 0;
        GetImageEncodersSize(&num, &size);
        if (size == 0)
        {
            return;
        }
        ImageCodecInfo* pImageCodecInfo = (ImageCodecInfo*)malloc(size);
        if (pImageCodecInfo == NULL)
        {
            return;
        }
        GetImageEncoders(num, size, pImageCodecInfo);
        for (UINT i = 0; i < num; ++i)
        {
            if (wcscmp(pImageCodecInfo[i].MimeType, format) == 0)
            {
                *pClsid = pImageCodecInfo[i].Clsid;
                free(pImageCodecInfo);
                return;
            }
        }
        free(pImageCodecInfo);
    }
    
    static void HandleMouseMoveRequest(int x, int y)
    {
        
        int width = GetSystemMetrics(SM_CXSCREEN);
        int height = GetSystemMetrics(SM_CYSCREEN);

        
        double fx = (double)x / 65535.0;
        
        SetCursorPos(x, y);
    }

    
    static void HandleMouseClickRequest(int x, int y)
    {
        
        int width = GetSystemMetrics(SM_CXSCREEN);
        int height = GetSystemMetrics(SM_CYSCREEN);

        
        double fx = (double)x / 65535.0;
        double fy = (double)y / 65535.0;
        int cx = (int)(fx * width);
        int cy = (int)(fy * height);

        
        SetCursorPos(cx, cy);

        
        INPUT input;
        memset(&input, 0, sizeof(input));
        input.type = INPUT_MOUSE;
        input.mi.dwFlags = MOUSEEVENTF_LEFTDOWN | MOUSEEVENTF_LEFTUP;
        SendInput(1, &input, sizeof(input));
    }

    
    static void HandleKeyInputRequest(char key)
    {
        
        HKL layout = GetKeyboardLayout(0);
        UINT vk = MapVirtualKeyExA(VkKeyScanExA(key, layout), 0, layout);

        
        INPUT input;
        memset(&input, 0, sizeof(input));
        input.type = INPUT_KEYBOARD;
        input.ki.wVk = vk;
        SendInput(1, &input, sizeof(input));
    }
private:
    Socket m_socket; 
};

int main()
{
    RemoteDesktopServer server;
    if (!server.Init(5555))
    {
        cout<<"启动服务器失败！"<<endl;
        return 1;
    }
    server.Run();
    return 0;
}