package sec09.exam05_row_add_update_delete;

import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.Vector;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
import javax.swing.table.DefaultTableModel;

public class JTableExample extends JFrame {
    private JTable jTable;
    private JPanel pSouth;
    private JTextField txtName, txtAge;
    private JButton btnInsert, btnUpdate, btnDelete;

    // 메인 윈도우 설정
    public JTableExample() {
        this.setTitle("JTableExample");
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.getContentPane().add(new JScrollPane(getJTable()), BorderLayout.CENTER);
        this.getContentPane().add(getPSouth(), BorderLayout.SOUTH);
        this.setSize(250, 250);
    }

    // JTable 생성
    public JTable getJTable() {
        if (jTable == null) {
            jTable = new JTable();
            final DefaultTableModel tableModel = (DefaultTableModel) jTable.getModel();
            tableModel.addColumn("이름");
            tableModel.addColumn("나이");
            
            // 행을 선택했을 때 이벤트 처리
            jTable.addMouseListener(new MouseAdapter() {
                @Override
                public void mouseClicked(MouseEvent e) {
                    int rowIndex = jTable.getSelectedRow();
                    if (rowIndex != -1) {
                        String name = (String) tableModel.getValueAt(rowIndex, 0);
                        String age = (String) tableModel.getValueAt(rowIndex, 1);
                        txtName.setText(name);
                        txtAge.setText(age);
                    }
                }
            });
        }
        return jTable;
    }

    // 사용자 입력 JPanel 생성
    public JPanel getPSouth() {
        if (pSouth == null) {
            pSouth = new JPanel();
            pSouth.setLayout(new GridLayout(3, 1));

            JPanel pNameInput = new JPanel();
            pNameInput.setLayout(new GridLayout(1, 2));
            pNameInput.add(new JLabel("이름", JLabel.CENTER));
            pNameInput.add(getTxtName());
            pSouth.add(pNameInput);

            JPanel pAgeInput = new JPanel();
            pAgeInput.setLayout(new GridLayout(1, 2));
            pAgeInput.add(new JLabel("나이", JLabel.CENTER));
            pAgeInput.add(getTxtAge());
            pSouth.add(pAgeInput);

            JPanel pButton = new JPanel();
            pButton.add(getBtnInsert());
            pButton.add(getBtnUpdate());
            pButton.add(getBtnDelete());
            pSouth.add(pButton);
        }
        return pSouth;
    }

    public JTextField getTxtName() {
        if (txtName == null) {
            txtName = new JTextField();
        }
        return txtName;
    }

    public JTextField getTxtAge() {
        if (txtAge == null) {
            txtAge = new JTextField();
        }
        return txtAge;
    }

    // 행 삽입 버튼 생성
    public JButton getBtnInsert() {
        if (btnInsert == null) {
            btnInsert = new JButton();
            btnInsert.setText("추가");
            btnInsert.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    Object[] rowData = { txtName.getText(), txtAge.getText() };
                    DefaultTableModel tableModel = (DefaultTableModel) getJTable().getModel();
                    tableModel.addRow(rowData);
                    txtName.setText("");
                    txtAge.setText("");
                }
            });
        }
        return btnInsert;
    }

    // 행 수정 버튼 생성
    public JButton getBtnUpdate() {
        if (btnUpdate == null) {
            btnUpdate = new JButton();
            btnUpdate.setText("수정");
            btnUpdate.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    int selectedRow = jTable.getSelectedRow();
                    if (selectedRow != -1) {
                        DefaultTableModel tableModel = (DefaultTableModel) getJTable().getModel();
                        Vector<Vector> rows = tableModel.getDataVector();
                        Vector row = rows.elementAt(selectedRow);
                        row.set(0, txtName.getText());
                        row.set(1, txtAge.getText());
                        tableModel.fireTableDataChanged();
                        txtName.setText("");
                        txtAge.setText("");
                    }
                }
            });
        }
        return btnUpdate;
    }

    // 행 삭제 버튼 생성
    public JButton getBtnDelete() {
        if (btnDelete == null) {
            btnDelete = new JButton();
            btnDelete.setText("삭제");
            btnDelete.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    int rowIndex = getJTable().getSelectedRow();
                    if (rowIndex != -1) {
                        DefaultTableModel tableModel = (DefaultTableModel) getJTable().getModel();
                        tableModel.removeRow(rowIndex);
                        txtName.setText("");
                        txtAge.setText("");
                    }
                }
            });
        }
        return btnDelete;
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                JTableExample jFrame = new JTableExample();
                jFrame.setVisible(true);
            }
        });
    }
}