// FileSenderDlg.cpp : implementation file
//
#include "stdafx.h"
#include "FileSender.h"
#include "FileSenderDlg.h"



#ifdef _DEBUG
#define new DEBUG_NEW
#endif

const int SERVER_PORT = 8000;
const int IPADDR_LENGTH = 15;
const int MAX_BLOCKSIZE	= 1024;

DWORD WINAPI FileTransfer(LPVOID  lpParam)
{
	CFileSenderDlg *dlg = reinterpret_cast<CFileSenderDlg *>(lpParam);
//	bool m_bOnLine = false;

	size_t readsize;
	size_t sentsize = 0;

	DWORD size;
	FILE *fp;
	SOCKET	s;
	
	//open file
	char filename[MAX_PATH];
	dlg->m_pFile->GetWindowText(filename, MAX_PATH);
	WIN32_FIND_DATA	wfd;
	HANDLE hFindFile = FindFirstFile(filename, &wfd);
	if (INVALID_HANDLE_VALUE == hFindFile)
	{
		dlg->MessageBox("File not exist", "Error", MB_OK|MB_ICONEXCLAMATION);
		goto end_thread;
	}

	//here, i consider the file is shorter than 2GB
	 size = wfd.nFileSizeLow;
	 size = size;
	 fp = fopen(filename, "rb");
	if (NULL == fp)
	{
		dlg->MessageBox("Unable to open file", "Error", MB_OK|MB_ICONEXCLAMATION);
		goto end_thread;
	}

	//start socket
//	  s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
	s = socket(AF_INET, SOCK_DGRAM,IPPROTO_UDP);
	//  server_socket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
	//  s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);	

	if (s == INVALID_SOCKET)
	{
		dlg->MessageBox("Unable to create socket", "Error", MB_OK|MB_ICONEXCLAMATION);
		goto end_thread;
	}
//////////chxli gai

	//connect to the server
	char szIP[IPADDR_LENGTH + 1];
	dlg->m_pIP->GetWindowText(szIP, IPADDR_LENGTH);
	struct sockaddr_in sin;
	
	memset(&sin, 0, sizeof(struct sockaddr_in));
	sin.sin_addr.s_addr = inet_addr(szIP);
	sin.sin_family = AF_INET;
	sin.sin_port = htons(SERVER_PORT);

	if (connect(s, reinterpret_cast<struct sockaddr *>(&sin), sizeof(sin)))
	{
		dlg->MessageBox("Unable to connect to server", "Error", MB_OK|MB_ICONEXCLAMATION);
		closesocket(s);
		goto end_thread;
	}

	//////////listen ,wait connect ,make sure it and send file
	/*
	if(server_socket.listen() == false)
	{
		dlg->MessageBox("Socket Listen Error");
		return;
	}
	SetWindowText("正在監聽連接!");
	if(server_socket.Accept(s) == FALSE)
	{
			AfxMessageBox("Socket Accept Error");
			return;
	}
    //	m_bOnLine = TRUE;
    	SetWindowText("有客戶連接");
		*/
	
	//send the file length
	send(s, reinterpret_cast<char *>(&size), sizeof(DWORD), 0);

	char readbuf[MAX_BLOCKSIZE];
	while (!feof(fp))
	{
		readsize = fread(readbuf, 1, MAX_BLOCKSIZE, fp);

		//convert little-endian to big-endian
		
		for (size_t j=0; j<readsize; j+=4)
		{
			*reinterpret_cast<long *>(readbuf + j) = htonl(*reinterpret_cast<long *>(readbuf + j));
		}
		
	//	send(s, reinterpret_cast<char *>(&sentsize), sizeof(DWORD), 0);
		send(s, readbuf, static_cast<int>(readsize), 0);
		Sleep(0.5);
		sentsize += readsize;
		dlg->m_pProgress->SetPos(static_cast<int>(
			static_cast<float>(sentsize) / static_cast<float>(size) * 100));
	}


end_thread:
	dlg->m_pBrowse->EnableWindow();
	dlg->m_pSend->EnableWindow();
	dlg->m_pIP->EnableWindow();
	dlg->m_pFile->EnableWindow();
	return 0;
}


// CFileSenderDlg dialog
CFileSenderDlg::CFileSenderDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CFileSenderDlg::IDD, pParent)
{
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

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

BEGIN_MESSAGE_MAP(CFileSenderDlg, CDialog)
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	//}}AFX_MSG_MAP
	ON_BN_CLICKED(IDBROWSE, CFileSenderDlg::OnBnClickedBrowse)
	ON_WM_CLOSE()
	ON_BN_CLICKED(IDSEND, CFileSenderDlg::OnBnClickedSend)
END_MESSAGE_MAP()


// CFileSenderDlg message handlers

BOOL CFileSenderDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon

	// TODO: Add extra initialization here
	m_pIP = (CEdit *)GetDlgItem(IDC_IP);
	m_pFile = (CEdit *)GetDlgItem(IDC_FILE);
	m_pSend = (CButton *)GetDlgItem(IDSEND);
	m_pBrowse = (CButton *)GetDlgItem(IDBROWSE);
	m_pProgress = (CProgressCtrl *)GetDlgItem(IDC_PROGRESS);

	//WinSock Startup
	WSADATA	wsa;
	if (WSAStartup(MAKEWORD(1, 1), &wsa) != 0)
	{
		MessageBox("Unable to initialize WinSock", "Error", MB_OK|MB_ICONEXCLAMATION);
		exit(-1);
	}

	return TRUE;  // return TRUE  unless you set the focus to a control
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CFileSenderDlg::OnPaint()
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this function to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CFileSenderDlg::OnQueryDragIcon()
{
	return static_cast<HCURSOR>(m_hIcon);
}

void CFileSenderDlg::OnBnClickedBrowse()
{
	// TODO: Add your control notification handler code here
	TCHAR szFilters[] = "All Files (*.*)|*.*||";
	CFileDialog	opendialog(TRUE, NULL, NULL, 
		OFN_FILEMUSTEXIST|OFN_HIDEREADONLY, szFilters, this);

	if (IDOK == opendialog.DoModal())
	{
		m_pFile->SetWindowText(opendialog.GetPathName());
	}
}



void CFileSenderDlg::OnClose()
{
	// TODO: Add your message handler code here and/or call default
	WSACleanup();
	CDialog::OnClose();
}

void CFileSenderDlg::OnBnClickedSend()
{
	// TODO: Add your control notification handler code here
	//start a new thread for file transferring
	m_pBrowse->EnableWindow(FALSE);
	m_pSend->EnableWindow(FALSE);
	m_pIP->EnableWindow(FALSE);
	m_pFile->EnableWindow(FALSE);
	CreateThread(NULL, 0, FileTransfer, this, 0, NULL);
}