// ClientDlg.cpp : implementation file
//

#include "stdafx.h"
#include "ChatClient.h"
#include "ClientDlg.h"
#include "ChatSocket.h"
#include "SetupDlg.h"
#include "msg.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()

/////////////////////////////////////////////////////////////////////////////
// CClientDlg dialog

CClientDlg::CClientDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CClientDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CClientDlg)
	m_strMsg = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
	
	m_bAutoChat=FALSE;
	m_pSocket=NULL;
	m_pFile=NULL;
	m_pArchiveIn=NULL;
	m_pArchiveOut=NULL;
}

void CClientDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CClientDlg)
	DDX_Control(pDX, IDC_LIST_MSG, m_ListMsg);
	DDX_Text(pDX, IDC_EDIT_MSG, m_strMsg);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CClientDlg, CDialog)
	//{{AFX_MSG_MAP(CClientDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_WM_DESTROY()
	ON_BN_CLICKED(IDOK, OnSend)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CClientDlg message handlers

BOOL CClientDlg::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
	
	// TODO: Add extra initialization here

	//CSetupDlg類的對象
	CSetupDlg dlg;
	while (TRUE)
	{
		//調用對話框
		//接受用戶的輸入
		if (dlg.DoModal()!=IDOK)
		{
			//退出應用程序
			CDialog::OnOK();
			return TRUE;
		}
		//向服務器發送連接請求
		//使用從設置窗口獲得的
		//客戶機名稱、服務器地址和通信端口號
		if (ConnectSocket(dlg.m_strHandle,dlg.m_strServer,dlg.m_nPort))
			return TRUE;
		if (AfxMessageBox("請嘗試別的地址！",MB_YESNO)==IDNO)
		{
			//退出應用程序
			CDialog::OnOK();
			return TRUE;
		}
	}
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CClientDlg::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 CClientDlg::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 CClientDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

//在CClientDlg類終止運行時進行的后續處理
void CClientDlg::OnDestroy() 
{
	CDialog::OnDestroy();
	
	// TODO: Add your message handler code here
	m_bAutoChat=FALSE;
	if ((m_pSocket!=NULL)&&(m_pFile!=NULL)&&(m_pArchiveOut!=NULL))
	{
		//發送客戶離開聊天室的消息
		CMsg msg;
		CString strTemp;
		strTemp=":離開聊天室！";
		msg.m_bClose=TRUE;
		msg.m_strText=m_strHandle+strTemp;
		msg.Serialize(*m_pArchiveOut);
		m_pArchiveOut->Flush();
	}
	//刪除CArchive對象
	delete m_pArchiveOut;
	m_pArchiveOut=NULL;
	//刪除CArchive對象
	delete m_pArchiveIn;
	m_pArchiveIn=NULL;
	delete m_pFile;
	//刪除CSOcketFile對象
	m_pFile=NULL;
	if (m_pSocket!=NULL)
	{
		BYTE Buffer[50];
		m_pSocket->ShutDown();
		while (m_pSocket->Receive(Buffer,50)>0);
	}
	delete m_pSocket;
	m_pSocket=NULL;
		
}

void CClientDlg::OnSend() 
{
	// TODO: Add extra validation here
	//獲得當前用戶輸入的信息
	UpdateData(TRUE);
	//信息是否為空字符串
	if (!m_strMsg.IsEmpty())
	{
		//非空字符串
		//發送信息
		this->SendMsg(m_strMsg);
		//信息設為空字符串
		m_strMsg=_T("");
		//更新當前顯示
		UpdateData(FALSE);
	}
}

//建立連接
BOOL CClientDlg::ConnectSocket(LPCTSTR lpszHandle,LPCTSTR lpszAddress,UINT nPort)
{
	//存儲用戶名
	m_strHandle=lpszHandle;
	//創建套接字對象
	m_pSocket=new CChatSocket(this);
	if (!m_pSocket->Create())
	{
		//錯誤處理
		delete m_pSocket;
		m_pSocket=NULL;
		AfxMessageBox("套接字創建錯誤！");
		return FALSE;
	}
	//發送連接請求
	while (!m_pSocket->Connect(lpszAddress,nPort))
	{
		//無法連接
		if (AfxMessageBox("無法連接服務器！\n重試？",MB_YESNO)==IDNO)
		{
			//錯誤處理
			delete m_pSocket;
			m_pSocket=NULL;
			return FALSE;
		}
	}
	//創建CSocketFile類對象
	m_pFile=new CSocketFile(m_pSocket);
	//創建CArchive類對象
	m_pArchiveIn=new CArchive(m_pFile,CArchive::load);
	m_pArchiveOut=new CArchive(m_pFile,CArchive::store);
	//發送消息
	//表明該客戶進入聊天室
	CString strTemp;
	strTemp="進入聊天室！";
	SendMsg(strTemp);
	return TRUE;
}

//讀取信息
void CClientDlg::OnReceive()
{
	do
	{
		//接收消息
		ReceiveMsg();
		if (m_pSocket==NULL)
			return;
	}
	while (!m_pArchiveIn->IsBufferEmpty());
}

//發送消息
void CClientDlg::SendMsg(CString& strText)
{
	if (m_pArchiveOut!=NULL)
	{
		CMsg msg;
		//消息預處理
		//表明消息的來源
		msg.m_strText=m_strHandle+_T(":")+strText;
		TRY
		{
			//發送消息
			msg.Serialize(*m_pArchiveOut);
			//將CArchive對象中數據強制存儲到CSocketFile對象中
			m_pArchiveOut->Flush();
		}
		CATCH(CFileException,e)
		{
			//錯誤處理
			m_bAutoChat=FALSE;
			m_pArchiveOut->Abort();
			delete m_pArchiveOut;
			m_pArchiveOut=NULL;
			CString strTemp;
			strTemp="服務器重置連接！";
			DisplayMsg(strTemp);
		}
		END_CATCH
	}
}

//接收消息
void CClientDlg::ReceiveMsg()
{
	CMsg msg;
	TRY
	{
		//接收消息
		msg.Serialize(*m_pArchiveIn);
		while (!msg.m_msgList.IsEmpty())
		{
			CString strTemp;
			//獲取消息內容
			strTemp=msg.m_msgList.RemoveHead();
			//顯示消息
			DisplayMsg(strTemp);
		}
	}
	CATCH(CFileException,e)
	{
		//錯誤處理
		m_bAutoChat=FALSE;
		msg.m_bClose=TRUE;
		m_pArchiveOut->Abort();
		CString strTemp;
		strTemp="服務器重置連接！";
		DisplayMsg(strTemp);
		strTemp="連接關閉！";
		DisplayMsg(strTemp);
	}
	END_CATCH
	if (msg.m_bClose)
	{
		//處理服務器關閉的消息
		delete m_pArchiveIn;
		m_pArchiveIn=NULL;
		delete m_pArchiveOut;
		m_pArchiveOut=NULL;
		delete m_pFile;
		m_pFile=NULL;
		delete m_pSocket;
		m_pSocket=NULL;
	}
}

//顯示消息
void CClientDlg::DisplayMsg(LPCTSTR lpszText)
{
	//顯示消息
	m_ListMsg.AddString(lpszText);
}