/*小凌 QQ:3312883*/
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.net.*;
import java.io.*;
class Customer extends Object implements java.io.Serializable
{
     String custName;
     String custPassword;
}
public class CustomerApplet extends JApplet 
{
	//聲明 面板 標簽 按鈕....
	JPanel panelObject;
	JLabel labelCustName; 
	JLabel labelCustPassword;
	JTextField textCustName;  
	JPasswordField textCustPassword;
    JButton buttonLogin;
	GridBagLayout gl;
	GridBagConstraints gbc;

	public void init()//程序入口
	{
		//初始化 布局 變量
		gl = new GridBagLayout();//初始化格子布局 gl
		gbc = new GridBagConstraints();//初始化格子約束
		panelObject = (JPanel)getContentPane();//設置主面板
		panelObject.setLayout(gl);//在主面板里設置一個格子布局 gl
            
            //初始化 控件
		labelCustName = new JLabel("Customer Login Name");
		labelCustPassword = new JLabel("Password");
		textCustName = new JTextField(15);
            textCustPassword = new JPasswordField(15);
            buttonLogin=new JButton("Login");
		
		//添加控件到面板上
		gbc.anchor = GridBagConstraints.NORTHWEST;
		gbc.gridx = 1;
		gbc.gridy = 5;
		gl.setConstraints(labelCustName,gbc);
		panelObject.add(labelCustName);
	
		gbc.anchor = GridBagConstraints.NORTHWEST;
		gbc.gridx = 4;
		gbc.gridy = 5;
		gl.setConstraints(textCustName,gbc);
		panelObject.add(textCustName);

		gbc.anchor = GridBagConstraints.NORTHWEST;	
		gbc.gridx = 1;
		gbc.gridy = 9;
		gl.setConstraints(labelCustPassword,gbc);
		panelObject.add(labelCustPassword);

		gbc.anchor = GridBagConstraints.NORTHWEST;
		gbc.gridx = 4;
		gbc.gridy = 9;
		gl.setConstraints(textCustPassword,gbc);
		panelObject.add(textCustPassword);

            gbc.anchor=GridBagConstraints.NORTHWEST;
            gbc.gridx=2;
            gbc.gridy=13;
            gl.setConstraints(buttonLogin,gbc);//格子布局gl設置約束 把buttonLogin加入約束
            panelObject.add(buttonLogin);
            
            LoginAction loginrequest=new LoginAction();//初始化一個登陸按鈕監聽類 為loginrequest
            buttonLogin.addActionListener(loginrequest);//給登陸按鈕(buttonLogin)加上"登陸按鈕監聽類" 讓他有事件功能
	}
    class LoginAction implements ActionListener//登陸按鈕監聽類
    {
       public void actionPerformed(ActionEvent evt)//當發生事件從這里開始
       {
            Object obj=evt.getSource();//取出事件內容
            if(obj==buttonLogin)//判斷事件內容
            {
            	
               Customer data=new Customer();//初始化一個Customer類
	   	       data.custName = textCustName.getText();//取JTextField的內容也就是用戶名 賦值到data.custName上
		       data.custPassword =new String(textCustPassword.getPassword());//基本同上 這次是取的密碼 賦值到data.custPassword
		   try//捕獲異常
		   {
			Socket toServer;//聲明一個套接字用來連接服務器
  			toServer = new Socket("127.0.0.1",1001);//初始化toServer 開始連接服務器
			ObjectOutputStream streamToServer=new ObjectOutputStream (toServer.getOutputStream());//初始化一個輸出流用來取服務器的IP 然后把	IP放入一個 才初始化的輸出流streamToServer 這個輸出流用來 向服務器發送數據				
			streamToServer.writeObject((Customer)data);//發送數據到服務器(SP  "(Customer)data"這也是個數據轉換 到data轉換到Customer類型)
			
                  //下面這段就是監聽了 
                  BufferedReader fromServer=new BufferedReader(new InputStreamReader(toServer.getInputStream()));//這句看著這么長其實很簡單 就是把服務器返回的數據 放到fromServer里
                  String status=fromServer.readLine();//然后讀出fromServer里的數據 到一個字符類型status
                  getAppletContext().showStatus(status);//在把status顯示到 Applet里
	            	streamToServer.close();//關閉輸出流
                  fromServer.close();//關閉BufferedReader //正常情況下 程序到這里就終止了 
                  
		 
               }
		   catch(InvalidClassException e)
		   {
			showStatus("The Customer class is invalid" + e);
		   }
		   catch(NotSerializableException e)
		   {
			showStatus("The object is not serializable" + e);
		   }
		   catch(IOException e)
		   {
			//showStatus("Cannot write to the server" + e);
			showStatus("連接服務器失敗！");
		   }	
	      }
       }
    }
}