// FileTransfersDlg.cpp : implementation file
//

#include "stdafx.h"
#include "FileTransfers.h"
#include "FileTransfersDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CAboutDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
	//{{AFX_DATA_INIT(CAboutDlg)
	//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAboutDlg)
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CFileTransfersDlg dialog
#define WM_ACCEPT_TRANSFERS WM_USER + 100

CWinThread* pThreadListen;		//監聽線程 --> _ListenThread
CWinThread* pThreadSend;        //連接線程 --> _ConnectThread

CFileTransfersDlg::CFileTransfersDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CFileTransfersDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CFileTransfersDlg)
	m_strFileName = _T("");
	m_strFileSize = _T("0 字節");
	m_wPort = 9600;
	m_nServerType = 0;
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);

	m_psockServer = NULL;
	m_psockClient = NULL;

	m_strPath = _T("");
	m_dwFileSize = 0;

	m_bIsStop = FALSE;
	m_bIsWait = FALSE;
	m_bIsTransmitting = FALSE;
}

void CFileTransfersDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CFileTransfersDlg)
	DDX_Control(pDX, IDC_PROGRESS, m_ctrlProgress);
	DDX_Text(pDX, IDC_FILE_NAME, m_strFileName);
	DDX_Text(pDX, IDC_FILE_SIZE, m_strFileSize);
	DDX_Text(pDX, IDC_PORT, m_wPort);
	DDX_Radio(pDX, IDC_RADIO_SERVER, m_nServerType);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CFileTransfersDlg, CDialog)
	//{{AFX_MSG_MAP(CFileTransfersDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_RADIO_SERVER, OnRadioServer)
	ON_BN_CLICKED(IDC_RADIO_CLIENT, OnRadioClient)
	ON_BN_CLICKED(IDC_BEGIN, OnBegin)
	ON_BN_CLICKED(IDC_DISCONNECT, OnDisconnect)
	ON_BN_CLICKED(IDC_SELECT_FILE, OnSelectFile)
	ON_BN_CLICKED(IDC_STOP_TRANSFERS, OnStopTransfers)
	ON_MESSAGE(WM_ACCEPT_TRANSFERS, OnAcceptTransfers)
	ON_WM_TIMER()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CFileTransfersDlg message handlers

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

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// 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
	
	CString strHostName,strIPAddress;
	if(GetLocalHostInfo(strHostName, strIPAddress))
		return FALSE;
	
	GetDlgItem(IDC_IPADDRESS)->SetWindowText(strIPAddress);
	GetDlgItem(IDC_IPADDRESS)->EnableWindow(FALSE);
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CFileTransfersDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

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

		SendMessage(WM_ICONERASEBKGND, (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 to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CFileTransfersDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

/* ---------------------------------- < 線程 > ---------------------------------- */

//接收文件線程
UINT _ListenThread(LPVOID lparam)
{
	CFileTransfersDlg* pDlg = (CFileTransfersDlg*)lparam;
	
	//創建套接字
	CSocket sockSrvr;
	if(!sockSrvr.Create(pDlg->m_wPort + PORT))
	{
		pDlg->TransfersFailed();
		::MessageBox((HWND)lparam, pDlg->GetError(GetLastError()), _T("錯誤"), MB_ICONHAND|MB_OK);
		return -1;
	}
	
	//開始監聽
	if(!sockSrvr.Listen())
	{
		pDlg->TransfersFailed();
		::MessageBox((HWND)lparam, pDlg->GetError(GetLastError()), _T("錯誤"), MB_ICONHAND|MB_OK);
		return -1;
	}
	
	pDlg->SendMessage(WM_ACCEPT_TRANSFERS);
	
	//接受連接
	CSocket recSo;
	if(!sockSrvr.Accept(recSo))
	{
		::MessageBox((HWND)lparam, pDlg->GetError(GetLastError()), _T("錯誤"), MB_ICONHAND|MB_OK);
		return -1;
	}
	
	sockSrvr.Close();

	pDlg->ReceiveFile(recSo);

	return 0;
}

//發送文件線程
UINT _SendThread(LPVOID lparam)
{
	CFileTransfersDlg* pDlg = (CFileTransfersDlg*) lparam;
	
	CSocket sockClient;
	if(!sockClient.Create())
	{
		pDlg->TransfersFailed();
		::MessageBox((HWND)lparam, pDlg->GetError(GetLastError()), _T("錯誤"), MB_ICONHAND|MB_OK);
		return -1;
	}
	
	CString strIPAddress;
	UINT nPort;
	pDlg->m_psockClient->GetPeerName(strIPAddress, nPort);
	if(!sockClient.Connect(strIPAddress, pDlg->m_wPort + PORT))
	{
		pDlg->TransfersFailed();
		::MessageBox((HWND)lparam, pDlg->GetError(GetLastError()), _T("錯誤"), MB_ICONHAND|MB_OK);
		return -1;
	}
	
	pDlg->SendFile(sockClient);
	
	return 0;
}

/* ----------------------------------< 線程 >---------------------------------- */

void CFileTransfersDlg::OnOK() 
{	
	//	CDialog::OnOK();
}

void CFileTransfersDlg::OnCancel() 
{
	if(m_bIsWait)
	{
		MessageBox(_T("等待中，請先停止傳送后再退出"), _T("警告"), MB_ICONEXCLAMATION);
		return ;
	}
	
	if(m_bIsTransmitting)
	{
		MessageBox(_T("文件傳輸中，請先停止傳送后再退出"), _T("警告"), MB_ICONEXCLAMATION);
		return ;
	}
	
	OnDisconnect();
	CDialog::OnCancel();
}

void CFileTransfersDlg::OnRadioServer() 
{
	CString strHostName,strIPAddress;
	if(GetLocalHostInfo(strHostName, strIPAddress))
		return ;
	GetDlgItem(IDC_IPADDRESS)->SetWindowText(strIPAddress);
	GetDlgItem(IDC_IPADDRESS)->EnableWindow(FALSE);
	GetDlgItem(IDC_BEGIN)->SetWindowText(_T("啟  動(&B)"));
	GetDlgItem(IDC_DISCONNECT)->SetWindowText(_T("關  閉(&D)"));
	GetDlgItem(IDC_TRANSFERS_TIP)->SetWindowText(_T("已發送:"));
}

void CFileTransfersDlg::OnRadioClient() 
{
	GetDlgItem(IDC_IPADDRESS)->SetWindowText(_T(""));
	GetDlgItem(IDC_IPADDRESS)->EnableWindow(TRUE);
	GetDlgItem(IDC_BEGIN)->SetWindowText(_T("連  接(&B)"));
	GetDlgItem(IDC_DISCONNECT)->SetWindowText(_T("斷  開(&D)"));
}

void CFileTransfersDlg::OnBegin() 
{	
	UpdateData(TRUE);
	
	//當程序作為服務器
	if(m_nServerType == SERVER)
	{
		//創建服務器套接字
		m_psockServer = new CListenSocket(this);
		if(!m_psockServer->Create(m_wPort))
		{
			delete m_psockServer;
			m_psockServer = NULL;
			
			MessageBox(GetError(GetLastError()), _T("錯誤"), MB_ICONHAND);
			
			return ;
		}
		
		//監聽客戶端連接
		if(!m_psockServer->Listen())
		{
			delete m_psockServer;
			m_psockServer = NULL;
			
			MessageBox(GetError(GetLastError()), _T("錯誤"), MB_ICONHAND);
			
			return ;
		}
	}
	else
	{
		//當程序作為客戶端
		if(((CIPAddressCtrl*)GetDlgItem(IDC_IPADDRESS))->IsBlank())
		{
			MessageBox("IP 地址不能為空", "錯誤", MB_ICONHAND);
			return ;
		}
		
		//創建客戶端套接字
		m_psockClient = new CClientSocket(this);
		if(!m_psockClient->Create())
		{
			delete m_psockClient;
			m_psockClient = NULL;
			
			MessageBox(GetError(GetLastError()), _T("錯誤"), MB_ICONHAND);
			
			return ;
		}
		
		//與服務器建立連接
		CString strIPAddress;
		GetDlgItem(IDC_IPADDRESS)->GetWindowText(strIPAddress);
		if(!m_psockClient->Connect(strIPAddress, m_wPort))
		{
			delete m_psockClient;
			m_psockClient = NULL;
			
			MessageBox(GetError(GetLastError()), _T("錯誤"), MB_ICONHAND);
			
			return ;
		}
		
		//初始化套接字
		m_psockClient->Init();
		
		GetDlgItem(IDC_IPADDRESS)->EnableWindow(FALSE);
	}

	GetDlgItem(IDC_RADIO_SERVER)->EnableWindow(FALSE);
	GetDlgItem(IDC_RADIO_CLIENT)->EnableWindow(FALSE);
	GetDlgItem(IDC_PORT)->EnableWindow(FALSE);
	GetDlgItem(IDC_BEGIN)->EnableWindow(FALSE);
	GetDlgItem(IDC_DISCONNECT)->EnableWindow(FALSE);
}

void CFileTransfersDlg::OnDisconnect() 
{	
	UpdateData(TRUE);
	
	//關閉客戶端套接字m_psockClient
	if(m_psockClient != NULL)
	{
		//告訴對方發送等待被取消
		CMessage* pMsg = new CMessage(DISCONNECT);
		m_psockClient->SendMsg(pMsg);
		
		delete m_psockClient;
		m_psockClient = NULL;
	}
	
	//關閉服務器端套接字m_psockServer
	if(m_psockServer != NULL)
	{
		delete m_psockServer;
		m_psockServer = NULL;
	}
	
	GetDlgItem(IDC_RADIO_SERVER)->EnableWindow(TRUE);
	GetDlgItem(IDC_RADIO_CLIENT)->EnableWindow(TRUE);
	GetDlgItem(IDC_PORT)->EnableWindow(TRUE);
	GetDlgItem(IDC_BEGIN)->EnableWindow(TRUE);
	GetDlgItem(IDC_DISCONNECT)->EnableWindow(FALSE);
	GetDlgItem(IDC_SELECT_FILE)->EnableWindow(FALSE);
	if(m_nServerType == CLIENT)
		GetDlgItem(IDC_IPADDRESS)->EnableWindow(TRUE);
}

void CFileTransfersDlg::OnSelectFile() 
{	
	CFileDialog dlg(TRUE, NULL, NULL, OFN_HIDEREADONLY|OFN_OVERWRITEPROMPT, "所有文件 (*.*)|*.*||", this);
	dlg.m_ofn.lpstrTitle = _T("打開");
	if(dlg.DoModal() == IDOK)
	{
		m_bIsWait = TRUE;
		m_bIsClient = TRUE;
		m_strPath = dlg.GetPathName();
		m_strFileName = dlg.GetFileName();
		
		//打開文件
		CFile file(m_strPath, CFile::modeRead);
		//獲取文件大小
		m_dwFileSize = file.GetLength();
		m_strFileSize.Format("%ld 字節", m_dwFileSize);
		//關閉文件
		file.Close();
		UpdateData(FALSE);
		
		//發出文件發送請求
		CMessage* pMsg = new CMessage(REQUEST, m_strFileName, m_dwFileSize);
		m_psockClient->SendMsg(pMsg);
		
		GetDlgItem(IDC_DISCONNECT)->EnableWindow(FALSE);
		GetDlgItem(IDC_SELECT_FILE)->EnableWindow(FALSE);
		GetDlgItem(IDC_STOP_TRANSFERS)->EnableWindow(TRUE);
		GetDlgItem(IDC_TRANSFERS_TIP)->SetWindowText(_T("已發送:"));