package library.user;

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;

import library.hibernate.UserTable;
import library.main.HibernateUtil;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;

/**
 * 
 * 刪除用戶類，將一些用戶從系統中刪除
 * 
 * @author lianhw
 * 
 */
public class UserDelete extends JFrame implements ActionListener {

	JPanel panel1, panel2;

	Container container;

	JLabel userLabel, passwordLabel;

	JTextField userText;

	JPasswordField passwordText;

	JButton yesButton, cancelButton;

	public UserDelete() {
		super("刪除用戶");
		container = getContentPane();
		container.setLayout(new BorderLayout());
		//“用戶名”標簽
		userLabel = new JLabel("用戶名", JLabel.CENTER);
		//“密碼”標簽
		passwordLabel = new JLabel("密碼", JLabel.CENTER);
		//輸入用戶名文本框
		userText = new JTextField(10);
		//輸入密碼文本框
		passwordText = new JPasswordField(10);
		//“確定”按鈕
		yesButton = new JButton("確定");
		//“取消”按鈕
		cancelButton = new JButton("取消");
		//為“確定”按鈕添加事件監聽者
		yesButton.addActionListener(this);
		//為“取消”按鈕添加事件監聽者
		cancelButton.addActionListener(this);
		panel1 = new JPanel();
		panel1.setLayout(new GridLayout(2, 2));
		panel1.add(userLabel);
		panel1.add(userText);
		panel1.add(passwordLabel);
		panel1.add(passwordText);
		panel2 = new JPanel();
		panel2.add(yesButton);
		panel2.add(cancelButton);
		container.add(panel1, BorderLayout.CENTER);
		container.add(panel2, BorderLayout.SOUTH);
		//設置窗口的大小
		setSize(300, 300);
	}

	/**
	 * 動作響應方法，將指定用戶從數據庫中刪除
	 * 
	 * @see java.awt.event.ActionListener#actionPerformed(java.awt.event.ActionEvent)
	 */
	public void actionPerformed(ActionEvent action) {

		if (action.getSource() == cancelButton) {
			// 如果單擊“取消”按鈕后執行的動作
			this.dispose();
		} else if (action.getSource() == yesButton) {
			// 單擊“確定”按鈕后將用戶從數據庫中刪除
			char[] password = passwordText.getPassword();
			// 將用戶密碼轉換成字符串
			String passwordStr = new String(password);
			// 判斷用戶名是否為空
			if (userText.getText().trim().equals("")) {
				JOptionPane.showMessageDialog(null, "用戶名不能為空！");
			}
			// 判斷密碼是否為空
			else if (passwordText.equals("")) {
				JOptionPane.showMessageDialog(null, "密碼不能為空！");
			} else {
				// 取得SessionFactory
				SessionFactory sessionFactory = HibernateUtil
						.getSessionFactory();
				// 打開session
				Session session = sessionFactory.openSession();
				// 創建一個事務
				Transaction tx = session.beginTransaction();
				// 創建UserTable對象
				UserTable user = new UserTable();
				// 設置user對象的名字
				user.setUserName(userText.getText().trim());
				// 設置user對象的密碼
				user.setPassword(passwordText.getText().trim());
				// 刪除該用戶
				session.delete(user);
				JOptionPane.showMessageDialog(null, "刪除成功!");
				// 事務提交
				tx.commit();
				// 關閉session
				session.close();
				this.dispose();

			}
		}
	}
}