package informationsystem.gui;

import java.awt.event.*;
import informationsystem.gui.MainWindow;
import informationsystem.database.DBHandler;
import informationsystem.information.*;

public class DeleteAction
    implements ActionListener {
  private MainWindow window;
  private DBHandler db = new DBHandler();

  public DeleteAction(MainWindow window) {
    this.window = window;
  }

  /**
   * Invoked when an action occurs.
   *
   * @param e ActionEvent
   * @todo Implement this java.awt.event.ActionListener method
   */
  public void actionPerformed(ActionEvent e) {
    try {
      String number = this.window.jTextField1.getText();
      if (number.equals("")) {
        this.window.jTextPane1.setText("請輸入學號!");
        return;
      }
      if (db.validate(number)) { // 判斷數據庫中是否有要刪除的記錄，如沒有則顯示提示框
        this.window.jTextField1.setText("");
        this.window.jTextPane1.setText("數據庫中沒有您要刪除的學號!");
      }
      else {
        if (Student.deleteStudent(number)) {
          this.window.jTextField1.setText("");
          this.window.jTextField2.setText("");
          this.window.jTextField3.setText("");
          this.window.jTextField4.setText("");
          this.window.jTextField5.setText("");
          this.window.jTextPane1.setText("記錄已成功刪除!");
        }
        else {
          this.window.jTextPane1.setText("記錄刪除失敗!");
        }
      }

    }
    catch (Exception ex) {
      ex.printStackTrace();
    }
  }
}