import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.net.Socket;
import java.util.List;

import javax.swing.JButton;
import javax.swing.JFrame;
 
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
/*這個類是伺服器端的UI*/
public class ServerUI extends JFrame {
    public static void main(String[] args) {
        ServerUI serverUI = new ServerUI();
    }

    
 
public JButton btStart;//啟動伺服器
    public JButton btSend;//傳送資訊按鈕
    public JTextField tfSend;//需要傳送的文字資訊
    public JTextArea taShow;//資訊展示
    public Server server;//用來監聽客戶端連線
    static List<Socket> clients;//儲存連線到伺服器的客戶端

    public ServerUI() {
        super("伺服器端");
        btStart = new JButton("啟動服務");
        btSend 
 
= new JButton("傳送資訊");
        tfSend = new JTextField(10);
        taShow = new JTextArea();

        btStart.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                server = new Server(ServerUI.this);
            }
        });
        btSend.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                server.sendMsg(tfSend.getText());
                tfSend.setText("");
            }
        });
        this.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                int a = JOptionPane.showConfirmDialog(null, "確定關閉嗎？", "溫馨提示",
                        JOptionPane.YES_NO_OPTION);
                if (a == 1) {
                    server.closeServer();
                    System.exit(0); // 關閉
                }
            }
        });
        JPanel top = new JPanel(new FlowLayout());
        top.add(tfSend);
        top.add(btSend);
        top.add(btStart);
        this.add(top, BorderLayout.SOUTH);
        final JScrollPane sp = new JScrollPane();
        sp.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
        sp.setViewportView(this.taShow);
        this.taShow.setEditable(false);
        this.add(sp, BorderLayout.CENTER);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setSize(400, 300);
        this.setLocation(100, 200);
        this.setVisible(true);
    }
}