/*
 * Copyright 2004 - 2013 Wayne Grant
 *           2013 - 2025 Kai Kramer
 *
 * This file is part of KeyStore Explorer.
 *
 * KeyStore Explorer is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * KeyStore Explorer is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with KeyStore Explorer.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.kse.gui.crypto.generalsubtree;

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Insets;
import java.awt.Point;
import java.awt.Toolkit;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.ArrayList;
import java.util.ResourceBundle;

import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.ListSelectionModel;
import javax.swing.ScrollPaneConstants;
import javax.swing.table.TableColumn;
import javax.swing.table.TableRowSorter;

import org.bouncycastle.asn1.x509.GeneralSubtree;
import org.kse.crypto.x509.GeneralSubtrees;
import org.kse.gui.CursorUtil;
import org.kse.gui.JKseTable;
import org.kse.gui.PlatformUtil;
import org.kse.utilities.os.OperatingSystem;

/**
 * Component to edit a set of general subtrees.
 */
public class JGeneralSubtrees extends JPanel {
    private static final long serialVersionUID = 1L;

    private static ResourceBundle res = ResourceBundle.getBundle("org/kse/gui/crypto/generalsubtree/resources");

    private JPanel jpGeneralSubtreeButtons;
    private JButton jbAdd;
    private JButton jbEdit;
    private JButton jbRemove;
    private JScrollPane jspGeneralSubtrees;
    private JKseTable jtGeneralSubtrees;

    private String title;
    private GeneralSubtrees generalSubtrees;
    private boolean enabled = true;

    /**
     * Construct a JGeneralSubtrees.
     *
     * @param title Title of edit dialog
     */
    public JGeneralSubtrees(String title) {
        this.title = title;
        initComponents();
    }

    private void initComponents() {
        jbAdd = new JButton(new ImageIcon(
                Toolkit.getDefaultToolkit().createImage(getClass().getResource("images/add_general_subtree.png"))));
        jbAdd.setMargin(new Insets(2, 2, 0, 0));
        jbAdd.setToolTipText(res.getString("JGeneralSubtrees.jbAdd.tooltip"));
        jbAdd.setMnemonic(res.getString("JGeneralSubtrees.jbAdd.mnemonic").charAt(0));

        jbAdd.addActionListener(evt -> {
            try {
                CursorUtil.setCursorBusy(JGeneralSubtrees.this);
                addPressed();
            } finally {
                CursorUtil.setCursorFree(JGeneralSubtrees.this);
            }
        });

        jbEdit = new JButton(new ImageIcon(
                Toolkit.getDefaultToolkit().createImage(getClass().getResource("images/edit_general_subtree.png"))));
        jbEdit.setMargin(new Insets(2, 2, 0, 0));
        jbEdit.setToolTipText(res.getString("JGeneralSubtrees.jbEdit.tooltip"));
        jbEdit.setMnemonic(res.getString("JGeneralSubtrees.jbEdit.mnemonic").charAt(0));

        jbEdit.setEnabled(false);

        jbEdit.addActionListener(evt -> {
            try {
                CursorUtil.setCursorBusy(JGeneralSubtrees.this);
                editPressed();
            } finally {
                CursorUtil.setCursorFree(JGeneralSubtrees.this);
            }
        });

        jbRemove = new JButton(new ImageIcon(
                Toolkit.getDefaultToolkit().createImage(getClass().getResource("images/remove_general_subtree.png"))));
        jbRemove.setMargin(new Insets(2, 2, 0, 0));
        jbRemove.setToolTipText(res.getString("JGeneralSubtrees.jbRemove.tooltip"));
        jbRemove.setMnemonic(res.getString("JGeneralSubtrees.jbRemove.mnemonic").charAt(0));

        jbRemove.setEnabled(false);

        jbRemove.addActionListener(evt -> {
            try {
                CursorUtil.setCursorBusy(JGeneralSubtrees.this);
                removePressed();
            } finally {
                CursorUtil.setCursorFree(JGeneralSubtrees.this);
            }
        });

        jpGeneralSubtreeButtons = new JPanel();
        jpGeneralSubtreeButtons.setLayout(new BoxLayout(jpGeneralSubtreeButtons, BoxLayout.Y_AXIS));
        jpGeneralSubtreeButtons.add(Box.createVerticalGlue());
        jpGeneralSubtreeButtons.add(jbAdd);
        jpGeneralSubtreeButtons.add(Box.createVerticalStrut(3));
        jpGeneralSubtreeButtons.add(jbEdit);
        jpGeneralSubtreeButtons.add(Box.createVerticalStrut(3));
        jpGeneralSubtreeButtons.add(jbRemove);
        jpGeneralSubtreeButtons.add(Box.createVerticalGlue());

        GeneralSubtreesTableModel generalSubtreesTableModel = new GeneralSubtreesTableModel();
        jtGeneralSubtrees = new JKseTable(generalSubtreesTableModel);

        TableRowSorter<GeneralSubtreesTableModel> sorter = new TableRowSorter<>(generalSubtreesTableModel);
        sorter.setComparator(0, new GeneralSubtreesTableModel.GeneralSubtreeBaseComparator());
        sorter.setComparator(1, new GeneralSubtreesTableModel.GeneralSubtreeMinimumComparator());
        sorter.setComparator(2, new GeneralSubtreesTableModel.GeneralSubtreeMaximumComparator());
        jtGeneralSubtrees.setRowSorter(sorter);

        jtGeneralSubtrees.setShowGrid(false);
        jtGeneralSubtrees.setRowMargin(0);
        jtGeneralSubtrees.getColumnModel().setColumnMargin(0);
        jtGeneralSubtrees.getTableHeader().setReorderingAllowed(false);
        jtGeneralSubtrees.setAutoResizeMode(JKseTable.AUTO_RESIZE_ALL_COLUMNS);
        jtGeneralSubtrees.setRowHeight(Math.max(18, jtGeneralSubtrees.getRowHeight()));

        for (int i = 0; i < jtGeneralSubtrees.getColumnCount(); i++) {
            TableColumn column = jtGeneralSubtrees.getColumnModel().getColumn(i);
            column.setHeaderRenderer(
                    new GeneralSubtreesTableHeadRend(jtGeneralSubtrees.getTableHeader().getDefaultRenderer()));
            column.setCellRenderer(new GeneralSubtreesTableCellRend());
        }

        ListSelectionModel selectionModel = jtGeneralSubtrees.getSelectionModel();
        selectionModel.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        selectionModel.addListSelectionListener(evt -> {
            if (!evt.getValueIsAdjusting()) {
                updateButtonControls();
            }
        });

        jtGeneralSubtrees.addMouseListener(new MouseAdapter() {
            @Override
            public void mouseClicked(MouseEvent evt) {
                maybeEditGeneralSubtree(evt);
            }
        });

        jtGeneralSubtrees.addKeyListener(new KeyAdapter() {
            boolean deleteLastPressed = false;

            @Override
            public void keyPressed(KeyEvent evt) {
                // Record delete pressed on non-Macs
                if (!OperatingSystem.isMacOs()) {
                    deleteLastPressed = evt.getKeyCode() == KeyEvent.VK_DELETE;
                }
            }

            @Override
            public void keyReleased(KeyEvent evt) {
                // Delete on non-Mac if delete was pressed and is now released
                if (!OperatingSystem.isMacOs() && deleteLastPressed && evt.getKeyCode() == KeyEvent.VK_DELETE) {
                    try {
                        CursorUtil.setCursorBusy(JGeneralSubtrees.this);
                        deleteLastPressed = false;
                        removeSelectedGeneralSubtree();
                    } finally {
                        CursorUtil.setCursorFree(JGeneralSubtrees.this);
                    }
                }
            }

            @Override
            public void keyTyped(KeyEvent evt) {
                // Delete on Mac if backspace typed
                if (OperatingSystem.isMacOs() && evt.getKeyChar() == 0x08) {
                    try {
                        CursorUtil.setCursorBusy(JGeneralSubtrees.this);
                        removeSelectedGeneralSubtree();
                    } finally {
                        CursorUtil.setCursorFree(JGeneralSubtrees.this);
                    }
                }
            }
        });

        jspGeneralSubtrees = PlatformUtil.createScrollPane(jtGeneralSubtrees,
                                                           ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED,
                                                           ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
        jspGeneralSubtrees.getViewport().setBackground(jtGeneralSubtrees.getBackground());

        this.setLayout(new BorderLayout(5, 5));
        setPreferredSize(new Dimension(400, 150));
        add(jspGeneralSubtrees, BorderLayout.CENTER);
        add(jpGeneralSubtreeButtons, BorderLayout.EAST);

        populate();
    }

    /**
     * Get general subtrees.
     *
     * @return General subtrees
     */
    public GeneralSubtrees getGeneralSubtrees() {
        return generalSubtrees;
    }

    /**
     * Set general subtrees.
     *
     * @param generalSubtrees General subtrees
     */
    public void setGeneralSubtrees(GeneralSubtrees generalSubtrees) {
        this.generalSubtrees = generalSubtrees;
        populate();
    }

    /**
     * Sets whether or not the component is enabled.
     *
     * @param enabled True if this component should be enabled, false otherwise
     */
    @Override
    public void setEnabled(boolean enabled) {
        this.enabled = enabled;
        updateButtonControls();
    }

    /**
     * Set component's tooltip text.
     *
     * @param toolTipText Tooltip text
     */
    @Override
    public void setToolTipText(String toolTipText) {
        super.setToolTipText(toolTipText);
        jspGeneralSubtrees.setToolTipText(toolTipText);
        jtGeneralSubtrees.setToolTipText(toolTipText);
    }

    private void populate() {
        if (generalSubtrees == null) {
            generalSubtrees = new GeneralSubtrees(new ArrayList<>());
        }

        reloadGeneralSubtreesTable();
        selectFirstGeneralSubtreeInTable();
        updateButtonControls();
    }

    private void addPressed() {
        Container container = getTopLevelAncestor();

        DGeneralSubtreeChooser dGeneralSubtreeChooser = null;

        if (container instanceof JDialog) {
            dGeneralSubtreeChooser = new DGeneralSubtreeChooser((JDialog) container, title, null);
        } else {
            dGeneralSubtreeChooser = new DGeneralSubtreeChooser((JFrame) container, title, null);
        }
        dGeneralSubtreeChooser.setLocationRelativeTo(container);
        dGeneralSubtreeChooser.setVisible(true);

        GeneralSubtree newGeneralSubtree = dGeneralSubtreeChooser.getGeneralSubtree();

        if (newGeneralSubtree == null) {
            return;
        }

        generalSubtrees.getGeneralSubtrees().add(newGeneralSubtree);

        populate();
        selectGeneralSubtreeInTable(newGeneralSubtree);
    }

    private void removePressed() {
        removeSelectedGeneralSubtree();
    }

    private void removeSelectedGeneralSubtree() {
        int selectedRow = jtGeneralSubtrees.getSelectedRow();

        if (selectedRow != -1) {
            GeneralSubtree generalSubtree = (GeneralSubtree) jtGeneralSubtrees.getValueAt(selectedRow, 0);

            generalSubtrees.getGeneralSubtrees().remove(generalSubtree);

            reloadGeneralSubtreesTable();
            selectFirstGeneralSubtreeInTable();
            updateButtonControls();
        }
    }

    private void editPressed() {
        editSelectedGeneralSubtree();
    }

    private void maybeEditGeneralSubtree(MouseEvent evt) {
        if (evt.getClickCount() > 1) {
            Point point = new Point(evt.getX(), evt.getY());
            int row = jtGeneralSubtrees.rowAtPoint(point);

            if (row != -1) {
                try {
                    CursorUtil.setCursorBusy(JGeneralSubtrees.this);
                    jtGeneralSubtrees.setRowSelectionInterval(row, row);
                    editSelectedGeneralSubtree();
                } finally {
                    CursorUtil.setCursorFree(JGeneralSubtrees.this);
                }
            }
        }
    }

    private void updateButtonControls() {
        if (!enabled) {
            jbAdd.setEnabled(false);
            jbEdit.setEnabled(false);
            jbRemove.setEnabled(false);
        } else {
            jbAdd.setEnabled(true);

            int selectedRow = jtGeneralSubtrees.getSelectedRow();

            if (selectedRow == -1) {
                jbEdit.setEnabled(false);
                jbRemove.setEnabled(false);
            } else {
                jbEdit.setEnabled(true);
                jbRemove.setEnabled(true);
            }
        }
    }

    private void editSelectedGeneralSubtree() {
        int selectedRow = jtGeneralSubtrees.getSelectedRow();

        if (selectedRow != -1) {
            GeneralSubtree generalSubtree = (GeneralSubtree) jtGeneralSubtrees.getValueAt(selectedRow, 0);

            Container container = getTopLevelAncestor();

            DGeneralSubtreeChooser dGeneralSubtreeChooser = null;

            if (container instanceof JDialog) {
                dGeneralSubtreeChooser = new DGeneralSubtreeChooser((JDialog) container, title, generalSubtree);
            } else {
                dGeneralSubtreeChooser = new DGeneralSubtreeChooser((JFrame) container, title, generalSubtree);
            }
            dGeneralSubtreeChooser.setLocationRelativeTo(container);
            dGeneralSubtreeChooser.setVisible(true);

            GeneralSubtree newGeneralSubtree = dGeneralSubtreeChooser.getGeneralSubtree();

            if (newGeneralSubtree == null) {
                return;
            }

            generalSubtrees.getGeneralSubtrees().remove(generalSubtree);
            generalSubtrees.getGeneralSubtrees().add(newGeneralSubtree);

            populate();
            selectGeneralSubtreeInTable(newGeneralSubtree);
        }
    }

    private void selectGeneralSubtreeInTable(GeneralSubtree generalSubtree) {
        for (int i = 0; i < jtGeneralSubtrees.getRowCount(); i++) {
            if (generalSubtree.equals(jtGeneralSubtrees.getValueAt(i, 0))) {
                jtGeneralSubtrees.changeSelection(i, 0, false, false);
                return;
            }
        }
    }

    private void reloadGeneralSubtreesTable() {
        getGeneralSubtreesTableModel().load(generalSubtrees);
    }

    private void selectFirstGeneralSubtreeInTable() {
        if (getGeneralSubtreesTableModel().getRowCount() > 0) {
            jtGeneralSubtrees.changeSelection(0, 0, false, false);
        }
    }

    private GeneralSubtreesTableModel getGeneralSubtreesTableModel() {
        return (GeneralSubtreesTableModel) jtGeneralSubtrees.getModel();
    }
}
