/*
 * 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.customextkeyusage;

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.HashSet;
import java.util.ResourceBundle;
import java.util.Set;

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.ASN1ObjectIdentifier;
import org.kse.gui.CursorUtil;
import org.kse.gui.JKseTable;
import org.kse.gui.PlatformUtil;
import org.kse.gui.error.DError;
import org.kse.gui.oid.DObjectIdChooser;
import org.kse.utilities.oid.InvalidObjectIdException;
import org.kse.utilities.oid.ObjectIdComparator;
import org.kse.utilities.os.OperatingSystem;

/**
 * Component to edit a set of custom extended key usages.
 */
public class JCustomExtendedKeyUsage extends JPanel {
    private static final long serialVersionUID = 1L;

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

    private JPanel jpCustomExtKeyUsageButtons;
    private JButton jbAdd;
    private JButton jbEdit;
    private JButton jbRemove;
    private JScrollPane jspCustomExtKeyUsage;
    private JKseTable jtCustomExtKeyUsages;

    private String title;
    private Set<ASN1ObjectIdentifier> objectIds;

    private boolean enabled = true;

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

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

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

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

        jbEdit.setEnabled(false);

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

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

        jbRemove.setEnabled(false);

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

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

        CustomExtKeyUsageTableModel customExtKeyUsageTableModel = new CustomExtKeyUsageTableModel();
        jtCustomExtKeyUsages = new JKseTable(customExtKeyUsageTableModel);

        TableRowSorter<CustomExtKeyUsageTableModel> sorter = new TableRowSorter<>(customExtKeyUsageTableModel);
        sorter.setComparator(0, new ObjectIdComparator());
        jtCustomExtKeyUsages.setRowSorter(sorter);

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

        for (int i = 0; i < jtCustomExtKeyUsages.getColumnCount(); i++) {
            TableColumn column = jtCustomExtKeyUsages.getColumnModel().getColumn(i);
            column.setHeaderRenderer(
                    new CustomExtKeyUsageTableHeadRend(jtCustomExtKeyUsages.getTableHeader().getDefaultRenderer()));
            column.setCellRenderer(new CustomExtKeyUsageTableCellRend());
        }

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

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

        jtCustomExtKeyUsages.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(JCustomExtendedKeyUsage.this);
                        deleteLastPressed = false;
                        removeSelectedCustomExtKeyUsage();
                    } finally {
                        CursorUtil.setCursorFree(JCustomExtendedKeyUsage.this);
                    }
                }
            }

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

        jspCustomExtKeyUsage = PlatformUtil.createScrollPane(jtCustomExtKeyUsages,
                                                             ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED,
                                                             ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
        jspCustomExtKeyUsage.getViewport().setBackground(jtCustomExtKeyUsages.getBackground());

        this.setLayout(new BorderLayout(5, 5));
        setPreferredSize(new Dimension(250, 150));
        add(jspCustomExtKeyUsage, BorderLayout.CENTER);
        add(jpCustomExtKeyUsageButtons, BorderLayout.EAST);

        populate();
    }

    /**
     * Get custom extended key usages.
     *
     * @return Custom extended key usages
     */
    public Set<ASN1ObjectIdentifier> getCustomExtKeyUsages() {
        return objectIds;
    }

    /**
     * Set custom extended key usages.
     *
     * @param customExtKeyUsages custom extended key usages
     */
    public void setCustomExtKeyUsages(Set<ASN1ObjectIdentifier> customExtKeyUsages) {
        this.objectIds = customExtKeyUsages;
        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);
        jspCustomExtKeyUsage.setToolTipText(toolTipText);
        jtCustomExtKeyUsages.setToolTipText(toolTipText);
    }

    private void populate() {
        if (objectIds == null) {
            objectIds = new HashSet<>();
        }

        reloadCustomExtKeyUsageTable();
        selectFirstCustomExtKeyUsageInTable();
        updateButtonControls();
    }

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

        try {
            DObjectIdChooser dObjectIdChooser = null;

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

            ASN1ObjectIdentifier newObjectId = dObjectIdChooser.getObjectId();

            if (newObjectId == null) {
                return;
            }

            objectIds.add(newObjectId);
            populate();
            selectCustomExtKeyUsageInTable(newObjectId);
        } catch (InvalidObjectIdException ex) {
            DError dError = null;

            if (container instanceof JDialog) {
                dError = new DError((JDialog) container, ex);
            } else {
                dError = new DError((JFrame) container, ex);
            }

            dError.setLocationRelativeTo(container);
            dError.setVisible(true);
        }
    }

    private void removePressed() {
        removeSelectedCustomExtKeyUsage();
    }

    private void removeSelectedCustomExtKeyUsage() {
        int selectedRow = jtCustomExtKeyUsages.getSelectedRow();

        if (selectedRow != -1) {
            ASN1ObjectIdentifier extKeyUsageOid = (ASN1ObjectIdentifier) jtCustomExtKeyUsages.getValueAt(selectedRow,
                                                                                                         0);

            objectIds.remove(extKeyUsageOid);

            reloadCustomExtKeyUsageTable();
            selectFirstCustomExtKeyUsageInTable();
            updateButtonControls();
        }
    }

    private void editPressed() {
        editSelectedCustomExtKeyUsage();
    }

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

            if (row != -1) {
                try {
                    CursorUtil.setCursorBusy(JCustomExtendedKeyUsage.this);
                    jtCustomExtKeyUsages.setRowSelectionInterval(row, row);
                    editSelectedCustomExtKeyUsage();
                } finally {
                    CursorUtil.setCursorFree(JCustomExtendedKeyUsage.this);
                }
            }
        }
    }

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

            int selectedRow = jtCustomExtKeyUsages.getSelectedRow();

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

    private void editSelectedCustomExtKeyUsage() {
        int selectedRow = jtCustomExtKeyUsages.getSelectedRow();

        if (selectedRow != -1) {
            ASN1ObjectIdentifier objectId = (ASN1ObjectIdentifier) jtCustomExtKeyUsages.getValueAt(selectedRow, 0);

            Container container = getTopLevelAncestor();

            try {
                DObjectIdChooser dObjectIdChooser = null;
                if (container instanceof JDialog) {
                    dObjectIdChooser = new DObjectIdChooser((JDialog) container, title, objectId);
                } else {
                    dObjectIdChooser = new DObjectIdChooser((JFrame) container, title, objectId);
                }

                dObjectIdChooser.setLocationRelativeTo(container);
                dObjectIdChooser.setVisible(true);

                ASN1ObjectIdentifier newObjectId = dObjectIdChooser.getObjectId();

                if (newObjectId == null) {
                    return;
                }

                objectIds.remove(objectId);
                objectIds.add(newObjectId);

                populate();
                selectCustomExtKeyUsageInTable(newObjectId);
            } catch (InvalidObjectIdException ex) {
                DError dError = null;

                if (container instanceof JDialog) {
                    dError = new DError((JDialog) container, ex);
                } else {
                    dError = new DError((JFrame) container, ex);
                }

                dError.setLocationRelativeTo(container);
                dError.setVisible(true);
            }
        }
    }

    private void selectCustomExtKeyUsageInTable(ASN1ObjectIdentifier objectId) {
        for (int i = 0; i < jtCustomExtKeyUsages.getRowCount(); i++) {
            if (objectId.equals(jtCustomExtKeyUsages.getValueAt(i, 0))) {
                jtCustomExtKeyUsages.changeSelection(i, 0, false, false);
                return;
            }
        }
    }

    private void reloadCustomExtKeyUsageTable() {
        getCustomExtKeyUsageTableModel().load(objectIds);
    }

    private void selectFirstCustomExtKeyUsageInTable() {
        if (getCustomExtKeyUsageTableModel().getRowCount() > 0) {
            jtCustomExtKeyUsages.changeSelection(0, 0, false, false);
        }
    }

    private CustomExtKeyUsageTableModel getCustomExtKeyUsageTableModel() {
        return (CustomExtKeyUsageTableModel) jtCustomExtKeyUsages.getModel();
    }

}
