import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.net.*;
import java.io.*;
import java.util.*;
/**
 * <p>Title: HappyChat聊天系統(tǒng)登錄程序</p>
 * <p>Description: 根據(jù)指定的服務(wù)器地址、用戶名和密碼登錄聊天服務(wù)器</p>
 * <p>Copyright: Copyright (c) 2006</p>
 * <p>Filename: Login.java</p>
 * @author 劉志成
 * @version 1.0
 */
public class  Login extends JFrame  implements ActionListener
{
	JPanel  pnlLogin;
 	JButton  btnLogin,btnRegister,btnExit;
	JLabel  lblServer,lblUserName,lblPassword,lblLogo;
	JTextField  txtUserName,txtServer;
	JPasswordField pwdPassword;
	String  strServerIp;
   //用于將窗口定位
	Dimension scrnsize;
	Toolkit toolkit=Toolkit.getDefaultToolkit();
	//構(gòu)造方法           	   
	public Login()
	{
		super("登錄[HappyChat]聊天室");
		pnlLogin=new JPanel();
		this.getContentPane().add(pnlLogin);
		
		lblServer=new JLabel("服務(wù)器(S):");
		lblUserName=new JLabel("用戶名(U):");
		lblPassword=new JLabel("口  令(P):");
		txtServer=new JTextField(20);
		txtServer.setText("127.0.0.1");
		txtUserName=new JTextField(20);
		pwdPassword=new JPasswordField(20);
		btnLogin=new JButton("登錄(L)");
		btnLogin.setToolTipText("登錄到服務(wù)器");
		btnLogin.setMnemonic('L');
		btnRegister=new JButton("注冊(R)");
		btnRegister.setToolTipText("注冊新用戶");
		btnRegister.setMnemonic('R');
		btnExit=new JButton("退出(X)");
		btnExit.setToolTipText("退出系統(tǒng)");
		btnExit.setMnemonic('X');
		/*  該布局采用手動布局           *
		 *　setBounds設(shè)置組件位置        *
		 *  setFont設(shè)置字體、字型、字號  *
		 *　setForeground設(shè)置文字的顏色  *
		 *  setBackground設(shè)置背景色      *
		 *  setOpaque將背景設(shè)置為透明    */
		pnlLogin.setLayout(null);  //組件用手動布局
		pnlLogin.setBackground(new Color(52,130,203));
		
		lblServer.setBounds(50,100,100,30);
		txtServer.setBounds(150,100,120,25);
		lblUserName    .setBounds(50,130,100,30);
		txtUserName    .setBounds(150,130,120,25);
		lblPassword    .setBounds(50,160,100,30);
		pwdPassword.setBounds(150,160,120,25);	
		btnLogin       .setBounds(50,200,80,25);
		btnRegister     .setBounds(130,200,80,25);
		btnExit        .setBounds(210,200,80,25);
		
		Font fontstr=new Font("宋體",Font.PLAIN,12);
		lblServer.setFont(fontstr);
		txtServer.setFont(fontstr);
		lblUserName    .setFont(fontstr);
		txtUserName    .setFont(fontstr);
		lblPassword    .setFont(fontstr);
		pwdPassword.setFont(fontstr);
		btnLogin.setFont(fontstr);
		btnRegister.setFont(fontstr);
		btnExit.setFont(fontstr);
		
		lblUserName.setForeground(Color.BLACK);
		lblPassword.setForeground(Color.BLACK);
		btnLogin.setBackground(Color.ORANGE);
		btnRegister.setBackground(Color.ORANGE);
		btnExit.setBackground(Color.ORANGE);
		
		pnlLogin.add(lblServer);
		pnlLogin.add(txtServer);
		pnlLogin.add(lblUserName);
		pnlLogin.add(txtUserName);
		pnlLogin.add(lblPassword);
		pnlLogin.add(pwdPassword);		
		pnlLogin.add(btnLogin);
		pnlLogin.add(btnRegister);
		pnlLogin.add(btnExit);
		
		//設(shè)置背景圖片
		Icon logo1 = new ImageIcon("images\\loginlogo.jpg");
	 	lblLogo = new JLabel(logo1);
		lblLogo.setBounds(0,0,340,66);
		pnlLogin.add(lblLogo);
        //設(shè)置登錄窗口
        setResizable(false);
		setSize(340,260);
		setVisible(true);
	    scrnsize=toolkit.getScreenSize();
    	setLocation(scrnsize.width/2-this.getWidth()/2,
    	                 scrnsize.height/2-this.getHeight()/2);
    	Image img=toolkit.getImage("images\\appico.jpg");
        setIconImage(img);
			
		//三個按鈕注冊監(jiān)聽
		btnLogin  .addActionListener(this);
		btnRegister.addActionListener(this);
		btnExit   .addActionListener(this);
		
	}  //構(gòu)造方法結(jié)束
	
		
	//按鈕監(jiān)聽響應(yīng)
	public void actionPerformed(ActionEvent ae)
	{
		Object source=ae.getSource();
		if (source.equals(btnLogin))
		{
		    //判斷用戶名和密碼是否為空
	    	if(txtUserName.getText().equals("") || pwdPassword.getText().equals(""))
		    {
			    JOptionPane op1=new JOptionPane();
                op1.showMessageDialog(null,"用戶名或密碼不能為空");
            }
            else
		    {
			    strServerIp=txtServer.getText();
			    login();
		    }
		}
		if (source.equals(btnRegister))
		{
		    strServerIp=txtServer.getText();
		    this.dispose();
		    new Register(strServerIp);
		}
		if (source == btnExit)
		{
		    System.exit(0);
		}
	}  //actionPerformed()結(jié)束
		
	//////////登錄事件響應(yīng)方法//////////
	public void login()
	{
	    //接受客戶的詳細(xì)資料
        Customer data=new Customer();
	   	data.custName=txtUserName.getText();
		data.custPassword = pwdPassword.getText();
		try
		{
			//連接到服務(wù)器
		   	Socket toServer;
  		   	toServer = new Socket(strServerIp,1001);
		   	ObjectOutputStream streamToServer=new ObjectOutputStream (toServer.getOutputStream());					
		   	//寫客戶詳細(xì)資料到服務(wù)器socket
		   	streamToServer.writeObject((Customer)data);           
           	//讀來自服務(wù)器socket的登錄狀態(tài)
           	BufferedReader fromServer=new BufferedReader(new InputStreamReader(toServer.getInputStream()));
           	String status=fromServer.readLine();
           	if (status.equals("登錄成功"))
           	{
				new ChatRoom((String)data.custName,strServerIp);
           	    this.dispose();
           	    //關(guān)閉流對象
		        streamToServer.close();
                fromServer.close();
                toServer.close();
           	}
           	else
           	{
           	    JOptionPane.showMessageDialog(null,status);
               //關(guān)閉流對象
		        streamToServer.close();
                fromServer.close();
                toServer.close();
           	}
         }
         catch(ConnectException e1)
         {
         	JOptionPane.showMessageDialog(null,"未能建立到指定服務(wù)器的連接!");
         }
		 catch(InvalidClassException e2)
		 {
		    JOptionPane.showMessageDialog(null,"類錯誤!");
		 }
		 catch(NotSerializableException e3)
		 {
			JOptionPane.showMessageDialog(null,"對象未序列化!");
		 }
		 catch(IOException e4)
		 {
		 	JOptionPane.showMessageDialog(null,"不能寫入到指定服務(wù)器!");
		 }
	}   //login()結(jié)束
	
	public static void main(String args[])
	{
		new Login();
	}
	
}  //Class Login結(jié)束