import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.net.*;
import java.io.*;
public class LoginDialog extends JFrame implements ActionListener, Runnable {
  //static JFrame jframe;
  JPanel jpanel;
  JButton loginButton;
  JButton cancelButton;
  JTextField nameTextField;
  JPasswordField pdField;
  JLabel nameLabel;
  JLabel pdLabel;
  JLabel infoLabel;
  static boolean isEnableChat=false;//判斷是否可以聊天
  String name=null;//用戶名
  String pd=null;//登陸密碼
  Socket socket;
  Thread thread=null;
  DataInputStream in=null;
  DataOutputStream out=null;
  public LoginDialog() {
    //super(f);
    jpanel=new JPanel();
    loginButton=new JButton("登陸");
    cancelButton=new JButton("退出");
    nameTextField=new JTextField(10);
    nameTextField.setText(null);
    //System.out.println(nameTextField.getText().trim());

    pdField=new JPasswordField(10);
    pdField.setText(null);
    nameLabel=new JLabel("用戶名",JLabel.CENTER);
    pdLabel=new JLabel("密碼",JLabel.CENTER);
    infoLabel=new JLabel("信息",JLabel.LEFT);
    setSize(200,140);
    this.setResizable(false);
    this.setTitle("登陸對話框");
    Container con=getContentPane();
    con.setLayout(new BorderLayout());
    jpanel.setLayout(new GridLayout(3,2));
    jpanel.add(nameLabel);
    jpanel.add(nameTextField);
    jpanel.add(pdLabel);
    jpanel.add(pdLabel);
    jpanel.add(pdField);
    jpanel.add(loginButton);
    jpanel.add(cancelButton);
    con.add(jpanel,"North");
    con.add(infoLabel,"South");
    loginButton.addActionListener(this);
    cancelButton.addActionListener(this);
    addWindowListener(new WindowAdapter(){
      public void windowClosing(WindowEvent e){
      //System.exit(0);
      dispose();
      }});
    thread=new Thread(this);
  }
  public void actionPerformed(ActionEvent e){
    if(e.getSource()==loginButton){

      this.setName(nameTextField.getText().trim());
      this.setPd(String.valueOf(pdField.getPassword()));
      this.nameTextField.setText("");
      this.pdField.setText("");
      this.infoLabel.setText("");
      //System.out.println((String.valueOf(pdField.getPassword())));
      if (name.length() != 0 && pd.length() != 0) {
        if (getEnableChat()) {
          this.infoLabel.setText("當前用戶已經在聊天，請先退出");
        }
        else {
          //this.infoLabel.setText("");
          if (socket != null) {
            try {
              out.writeUTF("LOGIN_NAME:" + name + "LOGIN_PD:" + pd);
              //this.loginButton.setEnabled(false);
            }
            catch (IOException ioe) {
              this.infoLabel.setText("網絡傳輸錯誤！");
            }
          }
        }
      }
      else {
        this.infoLabel.setText("請輸入用戶名和密碼！");
      }
    }




    else if(e.getSource()==cancelButton){
      System.exit(0);
    }
  }
  public String getName(){
    return name;
  }
  public void setName(String name){
    this.name=name;
  }
  public void setPd(String pd){
    this.pd=pd;
  }
  public void setEnableChat(boolean enableChat){
    this.isEnableChat=enableChat;
  }
  static public boolean getEnableChat(){
    return isEnableChat;
  }
  public void setConnection(Socket socket,DataInputStream in,DataOutputStream out){
    this.socket=socket;
    this.in=in;
    this.out=out;
    //System.out.println("this socket"+this.socket.getLocalPort());
    try{
      thread.start();
    }catch(Exception e){

      e.printStackTrace();

    }
  }
  public void run(){
    String message=null;
    while(true){
      if(in!=null){
        try {
          message = in.readUTF();
        }
        catch (IOException e) {
          this.infoLabel.setText("網絡傳輸發生錯誤！");
        }
      }
      try{
        if (message.length() > 0) {
          if (message.startsWith("LOGIN_SUCCEED")) {
            this.setEnableChat(true);
            this.setVisible(false);
            break;

          }
          else if (message.startsWith("LOGIN_ERROR")) {
            //this.loginButton.setEnabled(true);
            //this.loginButton.repaint();
            this.infoLabel.setText("登陸錯誤！");

          }
          else if (message.startsWith("LOGIN_PEOPLE:")) {
            //System.out.println("login");

            String peopleName = message.substring(message.indexOf(":") + 1);
            System.out.println(peopleName + "login");
          }
        }
      }catch(Exception e){

      }
      try{
        Thread.sleep(100);
      }catch(Exception e){

      }

    }

  }
  /*public static void main(String[] args) {
   // JFrame f=new JFrame();
    LoginDialog loginDialog = new LoginDialog();
    loginDialog.setVisible(true);
  }*/
}