// License: GPL. For details, see LICENSE file.
package org.openstreetmap.josm.tools;

import static java.awt.event.InputEvent.ALT_DOWN_MASK;
import static java.awt.event.InputEvent.CTRL_DOWN_MASK;
import static java.awt.event.InputEvent.SHIFT_DOWN_MASK;
import static java.awt.event.KeyEvent.VK_A;
import static java.awt.event.KeyEvent.VK_C;
import static java.awt.event.KeyEvent.VK_D;
import static java.awt.event.KeyEvent.VK_DELETE;
import static java.awt.event.KeyEvent.VK_DOWN;
import static java.awt.event.KeyEvent.VK_ENTER;
import static java.awt.event.KeyEvent.VK_ESCAPE;
import static java.awt.event.KeyEvent.VK_F10;
import static java.awt.event.KeyEvent.VK_F4;
import static java.awt.event.KeyEvent.VK_LEFT;
import static java.awt.event.KeyEvent.VK_NUM_LOCK;
import static java.awt.event.KeyEvent.VK_PRINTSCREEN;
import static java.awt.event.KeyEvent.VK_RIGHT;
import static java.awt.event.KeyEvent.VK_SHIFT;
import static java.awt.event.KeyEvent.VK_SPACE;
import static java.awt.event.KeyEvent.VK_TAB;
import static java.awt.event.KeyEvent.VK_UP;
import static java.awt.event.KeyEvent.VK_V;
import static java.awt.event.KeyEvent.VK_X;
import static java.awt.event.KeyEvent.VK_Y;
import static java.awt.event.KeyEvent.VK_Z;
import static org.openstreetmap.josm.tools.I18n.tr;

import java.awt.GraphicsEnvironment;
import java.io.File;
import java.io.IOException;
import java.nio.file.DirectoryStream;
import java.nio.file.FileSystems;
import java.nio.file.Files;
import java.nio.file.Path;
import java.security.InvalidKeyException;
import java.security.KeyFactory;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.PublicKey;
import java.security.SignatureException;
import java.security.cert.CertificateException;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.X509EncodedKeySpec;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Enumeration;
import java.util.List;

import javax.swing.JOptionPane;

import org.openstreetmap.josm.Main;

/**
  * {@code PlatformHook} implementation for Microsoft Windows systems.
  * @since 1023
  */
public class PlatformHookWindows extends PlatformHookUnixoid implements PlatformHook {

    private static final byte[] INSECURE_PUBLIC_KEY = new byte[] {
        0x30, (byte) 0x82, 0x1, 0x22, 0x30, 0xd, 0x6, 0x9, 0x2a, (byte) 0x86, 0x48,
        (byte) 0x86, (byte) 0xf7, 0xd, 0x1, 0x1, 0x1, 0x5, 0x0, 0x3, (byte) 0x82, 0x1, 0xf, 0x0,
        0x30, (byte) 0x82, 0x01, 0x0a, 0x02, (byte) 0x82, 0x01, 0x01, 0x00, (byte) 0x95, (byte) 0x95, (byte) 0x88,
        (byte) 0x84, (byte) 0xc8, (byte) 0xd9, 0x6b, (byte) 0xc5, (byte) 0xda, 0x0b, 0x69, (byte) 0xbf, (byte) 0xfc,
        0x7e, (byte) 0xb9, (byte) 0x96, 0x2c, (byte) 0xeb, (byte) 0x8f, (byte) 0xbc, 0x6e, 0x40, (byte) 0xe6, (byte) 0xe2,
        (byte) 0xfc, (byte) 0xf1, 0x7f, 0x73, (byte) 0xa7, (byte) 0x9d, (byte) 0xde, (byte) 0xc7, (byte) 0x88, 0x57, 0x51,
        (byte) 0x84, (byte) 0xed, (byte) 0x96, (byte) 0xfb, (byte) 0xe1, 0x38, (byte) 0xef, 0x08, 0x2b, (byte) 0xf3,
        (byte) 0xc7, (byte) 0xc3,  0x5d, (byte) 0xfe, (byte) 0xf9, 0x51, (byte) 0xe6, 0x29, (byte) 0xfc, (byte) 0xe5, 0x0d,
        (byte) 0xa1, 0x0d, (byte) 0xa8, (byte) 0xb4, (byte) 0xae, 0x26, 0x18, 0x19, 0x4d, 0x6c, 0x0c, 0x3b, 0x12, (byte) 0xba,
        (byte) 0xbc, 0x5f, 0x32, (byte) 0xb3, (byte) 0xbe, (byte) 0x9d, 0x17, 0x0d, 0x4d, 0x2f, 0x1a, 0x48, (byte) 0xb7,
        (byte) 0xac, (byte) 0xf7, 0x1a, 0x43, 0x01, (byte) 0x97, (byte) 0xf4, (byte) 0xf8, 0x4c, (byte) 0xbb, 0x6a, (byte) 0xbc,
        0x33, (byte) 0xe1, 0x73, 0x1e, (byte) 0x86, (byte) 0xfb, 0x2e, (byte) 0xb1, 0x63, 0x75, (byte) 0x85, (byte) 0xdc,
        (byte) 0x82, 0x6c, 0x28, (byte) 0xf1, (byte) 0xe3, (byte) 0x90, 0x63, (byte) 0x9d, 0x3d, 0x48, (byte) 0x8a, (byte) 0x8c,
        0x47, (byte) 0xe2, 0x10, 0x0b, (byte) 0xef, (byte) 0x91, (byte) 0x94, (byte) 0xb0, 0x6c, 0x4c, (byte) 0x80, 0x76, 0x03,
        (byte) 0xe1, (byte) 0xb6, (byte) 0x90, (byte) 0x87, (byte) 0xd9, (byte) 0xae, (byte) 0xf4, (byte) 0x8e, (byte) 0xe0,
        (byte) 0x9f, (byte) 0xe7, 0x3a, 0x2c, 0x2f, 0x21, (byte) 0xd4, 0x46, (byte) 0xba, (byte) 0x95, 0x70, (byte) 0xa9, 0x5b,
        0x20, 0x2a, (byte) 0xfa, 0x52, 0x3e, (byte) 0x9d, (byte) 0xd9, (byte) 0xef, 0x28, (byte) 0xc5, (byte) 0xd1, 0x60,
        (byte) 0x89, 0x68, 0x6e, 0x7f, (byte) 0xd7, (byte) 0x9e, (byte) 0x89, 0x4c, (byte) 0xeb, 0x4d, (byte) 0xd2, (byte) 0xc6,
        (byte) 0xf4, 0x2d, 0x02, 0x5d, (byte) 0xda, (byte) 0xde, 0x33, (byte) 0xfe, (byte) 0xc1, 0x7e, (byte) 0xde, 0x4f, 0x1f,
        (byte) 0x9b, 0x6e, 0x6f, 0x0f, 0x66, 0x71, 0x19, (byte) 0xe9, 0x43, 0x3c, (byte) 0x83, 0x0a, 0x0f, 0x28, 0x21, (byte) 0xc8,
        0x38, (byte) 0xd3, 0x4e, 0x48, (byte) 0xdf, (byte) 0xd4, (byte) 0x99, (byte) 0xb5, (byte) 0xc6, (byte) 0x8d, (byte) 0xd4,
        (byte) 0xc1, 0x69, 0x58, 0x79, (byte) 0x82, 0x32, (byte) 0x82, (byte) 0xd4, (byte) 0x86, (byte) 0xe2, 0x04, 0x08, 0x63,
        (byte) 0x87, (byte) 0xf0, 0x2a, (byte) 0xf6, (byte) 0xec, 0x3e, 0x51, 0x0f, (byte) 0xda, (byte) 0xb4, 0x67, 0x19, 0x5e,
        0x16, 0x02, (byte) 0x9f, (byte) 0xf1, 0x19, 0x0c, 0x3e, (byte) 0xb8, 0x04, 0x49, 0x07, 0x53, 0x02, 0x03, 0x01, 0x00, 0x01
    };

    private static final String WINDOWS_ROOT = "Windows-ROOT";

    @Override
    public void afterPrefStartupHook() {
        extendFontconfig("fontconfig.properties.src");
    }

    @Override
    public void openUrl(String url) throws IOException {
        Runtime.getRuntime().exec("rundll32 url.dll,FileProtocolHandler " + url);
    }

    @Override
    public void initSystemShortcuts() {
        //Shortcut.registerSystemCut("system:menuexit", tr("reserved"), VK_Q, CTRL_DOWN_MASK);
        Shortcut.registerSystemShortcut("system:duplicate", tr("reserved"), VK_D, CTRL_DOWN_MASK); // not really system, but to avoid odd results

        // Windows 7 shortcuts: http://windows.microsoft.com/en-US/windows7/Keyboard-shortcuts

        // Shortcuts with setAutomatic(): items with automatic shortcuts will not be added to the menu bar at all

        // Don't know why Ctrl-Alt-Del isn't even listed on official Microsoft support page
        Shortcut.registerSystemShortcut("system:reset", tr("reserved"), VK_DELETE, CTRL_DOWN_MASK | ALT_DOWN_MASK).setAutomatic();

        // Ease of Access keyboard shortcuts
        Shortcut.registerSystemShortcut("microsoft-reserved-01", tr("reserved"), VK_PRINTSCREEN, ALT_DOWN_MASK | SHIFT_DOWN_MASK).setAutomatic(); // Turn High Contrast on or off
        Shortcut.registerSystemShortcut("microsoft-reserved-02", tr("reserved"), VK_NUM_LOCK, ALT_DOWN_MASK | SHIFT_DOWN_MASK).setAutomatic(); // Turn Mouse Keys on or off
        //Shortcut.registerSystemCut("microsoft-reserved-03", tr("reserved"), VK_U, );// Open the Ease of Access Center (TODO: Windows-U, how to handle it in Java ?)

        // General keyboard shortcuts
        //Shortcut.registerSystemShortcut("system:help", tr("reserved"), VK_F1, 0);                            // Display Help
        Shortcut.registerSystemShortcut("system:copy", tr("reserved"), VK_C, CTRL_DOWN_MASK);                // Copy the selected item
        Shortcut.registerSystemShortcut("system:cut", tr("reserved"), VK_X, CTRL_DOWN_MASK);                 // Cut the selected item
        Shortcut.registerSystemShortcut("system:paste", tr("reserved"), VK_V, CTRL_DOWN_MASK);               // Paste the selected item
        Shortcut.registerSystemShortcut("system:undo", tr("reserved"), VK_Z, CTRL_DOWN_MASK);                // Undo an action
        Shortcut.registerSystemShortcut("system:redo", tr("reserved"), VK_Y, CTRL_DOWN_MASK);                // Redo an action
        //Shortcut.registerSystemCut("microsoft-reserved-10", tr("reserved"), VK_DELETE, 0);                  // Delete the selected item and move it to the Recycle Bin
        //Shortcut.registerSystemCut("microsoft-reserved-11", tr("reserved"), VK_DELETE, SHIFT_DOWN_MASK);    // Delete the selected item without moving it to the Recycle Bin first
        //Shortcut.registerSystemCut("system:rename", tr("reserved"), VK_F2, 0);                          // Rename the selected item
        Shortcut.registerSystemShortcut("system:movefocusright", tr("reserved"), VK_RIGHT, CTRL_DOWN_MASK);  // Move the cursor to the beginning of the next word
        Shortcut.registerSystemShortcut("system:movefocusleft", tr("reserved"), VK_LEFT, CTRL_DOWN_MASK);    // Move the cursor to the beginning of the previous word
        Shortcut.registerSystemShortcut("system:movefocusdown", tr("reserved"), VK_DOWN, CTRL_DOWN_MASK);    // Move the cursor to the beginning of the next paragraph
        Shortcut.registerSystemShortcut("system:movefocusup", tr("reserved"), VK_UP, CTRL_DOWN_MASK);        // Move the cursor to the beginning of the previous paragraph
        //Shortcut.registerSystemCut("microsoft-reserved-17", tr("reserved"), VK_RIGHT, CTRL_DOWN_MASK | SHIFT_DOWN_MASK); // Select a block of text
        //Shortcut.registerSystemCut("microsoft-reserved-18", tr("reserved"), VK_LEFT, CTRL_DOWN_MASK | SHIFT_DOWN_MASK);  // Select a block of text
        //Shortcut.registerSystemCut("microsoft-reserved-19", tr("reserved"), VK_DOWN, CTRL_DOWN_MASK | SHIFT_DOWN_MASK);  // Select a block of text
        //Shortcut.registerSystemCut("microsoft-reserved-20", tr("reserved"), VK_UP, CTRL_DOWN_MASK | SHIFT_DOWN_MASK);    // Select a block of text
        //Shortcut.registerSystemCut("microsoft-reserved-21", tr("reserved"), VK_RIGHT, SHIFT_DOWN_MASK); // Select more than one item in a window or on the desktop, or select text within a document
        //Shortcut.registerSystemCut("microsoft-reserved-22", tr("reserved"), VK_LEFT, SHIFT_DOWN_MASK);  // Select more than one item in a window or on the desktop, or select text within a document
        //Shortcut.registerSystemCut("microsoft-reserved-23", tr("reserved"), VK_DOWN, SHIFT_DOWN_MASK);  // Select more than one item in a window or on the desktop, or select text within a document
        //Shortcut.registerSystemCut("microsoft-reserved-24", tr("reserved"), VK_UP, SHIFT_DOWN_MASK);    // Select more than one item in a window or on the desktop, or select text within a document
        //Shortcut.registerSystemCut("microsoft-reserved-25", tr("reserved"), VK_RIGHT+, CTRL_DOWN_MASK); // Select multiple individual items in a window or on the desktop (TODO: ctrl+arrow+spacebar, how to handle it in Java ?)
        //Shortcut.registerSystemCut("microsoft-reserved-26", tr("reserved"), VK_LEFT+, CTRL_DOWN_MASK);  // Select multiple individual items in a window or on the desktop (TODO: ctrl+arrow+spacebar, how to handle it in Java ?)
        //Shortcut.registerSystemCut("microsoft-reserved-27", tr("reserved"), VK_DOWN+, CTRL_DOWN_MASK);  // Select multiple individual items in a window or on the desktop (TODO: ctrl+arrow+spacebar, how to handle it in Java ?)
        //Shortcut.registerSystemCut("microsoft-reserved-28", tr("reserved"), VK_UP+, CTRL_DOWN_MASK);    // Select multiple individual items in a window or on the desktop (TODO: ctrl+arrow+spacebar, how to handle it in Java ?)
        Shortcut.registerSystemShortcut("system:selectall", tr("reserved"), VK_A, CTRL_DOWN_MASK);           // Select all items in a document or window
        //Shortcut.registerSystemCut("system:search", tr("reserved"), VK_F3, 0);                          // Search for a file or folder
        Shortcut.registerSystemShortcut("microsoft-reserved-31", tr("reserved"), VK_ENTER, ALT_DOWN_MASK).setAutomatic();   // Display properties for the selected item
        Shortcut.registerSystemShortcut("system:exit", tr("reserved"), VK_F4, ALT_DOWN_MASK).setAutomatic(); // Close the active item, or exit the active program
        Shortcut.registerSystemShortcut("microsoft-reserved-33", tr("reserved"), VK_SPACE, ALT_DOWN_MASK).setAutomatic();   // Open the shortcut menu for the active window
        //Shortcut.registerSystemCut("microsoft-reserved-34", tr("reserved"), VK_F4, CTRL_DOWN_MASK);     // Close the active document (in programs that allow you to have multiple documents open simultaneously)
        Shortcut.registerSystemShortcut("microsoft-reserved-35", tr("reserved"), VK_TAB, ALT_DOWN_MASK).setAutomatic();     // Switch between open items
        Shortcut.registerSystemShortcut("microsoft-reserved-36", tr("reserved"), VK_TAB, CTRL_DOWN_MASK | ALT_DOWN_MASK).setAutomatic(); // Use the arrow keys to switch between open items
        //Shortcut.registerSystemCut("microsoft-reserved-37", tr("reserved"), VK_TAB, ); // Cycle through programs on the taskbar by using Aero Flip 3-D (TODO: Windows-Tab, how to handle it in Java ?)
        //Shortcut.registerSystemCut("microsoft-reserved-38", tr("reserved"), VK_TAB, CTRL_DOWN_MASK | ); // Use the arrow keys to cycle through programs on the taskbar by using Aero Flip 3-D (TODO: Ctrl-Windows-Tab, how to handle it in Java ?)
        Shortcut.registerSystemShortcut("microsoft-reserved-39", tr("reserved"), VK_ESCAPE, ALT_DOWN_MASK).setAutomatic();  // Cycle through items in the order in which they were opened
        //Shortcut.registerSystemCut("microsoft-reserved-40", tr("reserved"), VK_F6, 0);                  // Cycle through screen elements in a window or on the desktop
        //Shortcut.registerSystemCut("microsoft-reserved-41", tr("reserved"), VK_F4, 0);                  // Display the address bar list in Windows Explorer
        Shortcut.registerSystemShortcut("microsoft-reserved-42", tr("reserved"), VK_F10, SHIFT_DOWN_MASK);   // Display the shortcut menu for the selected item
        Shortcut.registerSystemShortcut("microsoft-reserved-43", tr("reserved"), VK_ESCAPE, CTRL_DOWN_MASK).setAutomatic(); // Open the Start menu
        //Shortcut.registerSystemShortcut("microsoft-reserved-44", tr("reserved"), VK_F10, 0);                 // Activate the menu bar in the active program
        //Shortcut.registerSystemCut("microsoft-reserved-45", tr("reserved"), VK_RIGHT, 0);               // Open the next menu to the right, or open a submenu
        //Shortcut.registerSystemCut("microsoft-reserved-46", tr("reserved"), VK_LEFT, 0);                // Open the next menu to the left, or close a submenu
        //Shortcut.registerSystemCut("microsoft-reserved-47", tr("reserved"), VK_F5, 0);                  // Refresh the active window
        //Shortcut.registerSystemCut("microsoft-reserved-48", tr("reserved"), VK_UP, ALT_DOWN_MASK);      // View the folder one level up in Windows Explorer
        //Shortcut.registerSystemCut("microsoft-reserved-49", tr("reserved"), VK_ESCAPE, 0);              // Cancel the current task
        Shortcut.registerSystemShortcut("microsoft-reserved-50", tr("reserved"), VK_ESCAPE, CTRL_DOWN_MASK | SHIFT_DOWN_MASK).setAutomatic(); // Open Task Manager
        Shortcut.registerSystemShortcut("microsoft-reserved-51", tr("reserved"), VK_SHIFT, ALT_DOWN_MASK).setAutomatic();   // Switch the input language when multiple input languages are enabled
        Shortcut.registerSystemShortcut("microsoft-reserved-52", tr("reserved"), VK_SHIFT, CTRL_DOWN_MASK).setAutomatic();  // Switch the keyboard layout when multiple keyboard layouts are enabled
        //Shortcut.registerSystemCut("microsoft-reserved-53", tr("reserved"), ); // Change the reading direction of text in right-to-left reading languages (TODO: unclear)
    }

    @Override
    public String getDefaultStyle() {
        return "com.sun.java.swing.plaf.windows.WindowsLookAndFeel";
    }

    @Override
    public boolean rename(File from, File to) {
        if (to.exists())
            to.delete();
        return from.renameTo(to);
    }

    @Override
    public String getOSDescription() {
        return Utils.strip(System.getProperty("os.name")) + " " +
                ((System.getenv("ProgramFiles(x86)") == null) ? "32" : "64") + "-Bit";
    }

    /**
     * Loads Windows-ROOT keystore.
     * @return Windows-ROOT keystore
     * @throws NoSuchAlgorithmException if the algorithm used to check the integrity of the keystore cannot be found
     * @throws CertificateException if any of the certificates in the keystore could not be loaded
     * @throws IOException if there is an I/O or format problem with the keystore data, if a password is required but not given
     * @throws KeyStoreException if no Provider supports a KeyStore implementation for the type "Windows-ROOT"
     * @since 7343
     */
    public static KeyStore getRootKeystore() throws NoSuchAlgorithmException, CertificateException, IOException, KeyStoreException {
        KeyStore ks = KeyStore.getInstance(WINDOWS_ROOT);
        ks.load(null, null);
        return ks;
    }

    /**
     * Removes potential insecure certificates installed with previous versions of JOSM on Windows.
     * @throws NoSuchAlgorithmException on unsupported signature algorithms
     * @throws CertificateException if any of the certificates in the Windows keystore could not be loaded
     * @throws KeyStoreException if no Provider supports a KeyStoreSpi implementation for the type "Windows-ROOT"
     * @throws IOException if there is an I/O or format problem with the keystore data, if a password is required but not given
     * @since 7335
     */
    public static void removeInsecureCertificates() throws NoSuchAlgorithmException, CertificateException, KeyStoreException, IOException {
        // We offered before a public private key we need now to remove from Windows PCs as it might be a huge security risk (see #10230)
        PublicKey insecurePubKey = null;
        try {
            insecurePubKey = KeyFactory.getInstance("RSA").generatePublic(new X509EncodedKeySpec(INSECURE_PUBLIC_KEY));
        } catch (InvalidKeySpecException | NoSuchAlgorithmException e) {
            Main.error(e);
            return;
        }
        KeyStore ks = getRootKeystore();
        Enumeration<String> en = ks.aliases();
        Collection<String> insecureCertificates = new ArrayList<>();
        while (en.hasMoreElements()) {
            String alias = en.nextElement();
            // Look for certificates associated with a private key
            if (ks.isKeyEntry(alias)) {
                try {
                    ks.getCertificate(alias).verify(insecurePubKey);
                    // If no exception, this is a certificate signed with the insecure key -> remove it
                    insecureCertificates.add(alias);
                } catch (InvalidKeyException | NoSuchProviderException | SignatureException e) {
                    // If exception this is not a certificate related to JOSM, just trace it
                    Main.trace(alias + " --> " + e.getClass().getName());
                }
            }
        }
        // Remove insecure certificates
        if (!insecureCertificates.isEmpty()) {
            StringBuilder message = new StringBuilder("<html>");
            message.append(tr("A previous version of JOSM has installed a custom certificate "+
                    "in order to provide HTTPS support for Remote Control:"))
                   .append("<br><ul>");
            for (String alias : insecureCertificates) {
                message.append("<li>")
                       .append(alias)
                       .append("</li>");
            }
            message.append("</ul>")
                   .append(tr("It appears it could be an important <b>security risk</b>.<br><br>"+
                    "You are now going to be prompted by Windows to remove this insecure certificate.<br>"+
                    "For your own safety, <b>please click Yes</b> in next dialog."))
                   .append("</html>");
            JOptionPane.showMessageDialog(Main.parent, message.toString(), tr("Warning"), JOptionPane.WARNING_MESSAGE);
            for (String alias : insecureCertificates) {
                Main.warn(tr("Removing insecure certificate from {0} keystore: {1}", WINDOWS_ROOT, alias));
                try {
                    ks.deleteEntry(alias);
                } catch (KeyStoreException e) {
                    Main.error(tr("Unable to remove insecure certificate from keystore: {0}", e.getMessage()));
                }
            }
        }
    }

    @Override
    public boolean setupHttpsCertificate(String entryAlias, KeyStore.TrustedCertificateEntry trustedCert)
            throws KeyStoreException, NoSuchAlgorithmException, CertificateException, IOException {
        KeyStore ks = getRootKeystore();
        // Look for certificate to install
        String alias = ks.getCertificateAlias(trustedCert.getTrustedCertificate());
        if (alias != null) {
            // JOSM certificate found, return
            Main.debug(tr("JOSM localhost certificate found in {0} keystore: {1}", WINDOWS_ROOT, alias));
            return false;
        }
        if (!GraphicsEnvironment.isHeadless()) {
            // JOSM certificate not found, warn user
            StringBuilder message = new StringBuilder("<html>");
            message.append(tr("Remote Control is configured to provide HTTPS support.<br>"+
                    "This requires to add a custom certificate generated by JOSM to the Windows Root CA store.<br><br>"+
                    "You are now going to be prompted by Windows to confirm this operation.<br>"+
                    "To enable proper HTTPS support, <b>please click Yes</b> in next dialog.<br><br>"+
                    "If unsure, you can also click No then disable HTTPS support in Remote Control preferences."))
                   .append("</html>");
            JOptionPane.showMessageDialog(Main.parent, message.toString(),
                    tr("HTTPS support in Remote Control"), JOptionPane.INFORMATION_MESSAGE);
        }
        // install it to Windows-ROOT keystore, used by IE, Chrome and Safari, but not by Firefox
        Main.info(tr("Adding JOSM localhost certificate to {0} keystore", WINDOWS_ROOT));
        ks.setEntry(entryAlias, trustedCert, null);
        return true;
    }

    @Override
    public File getDefaultCacheDirectory() {
        String p = System.getenv("LOCALAPPDATA");
        if (p == null || p.isEmpty()) {
            // Fallback for Windows OS earlier than Windows Vista, where the variable is not defined
            p = System.getenv("APPDATA");
        }
        return new File(new File(p, "JOSM"), "cache");
    }

    @Override
    public File getDefaultPrefDirectory() {
        return new File(System.getenv("APPDATA"), "JOSM");
    }

    @Override
    public Collection<String> getInstalledFonts() {
        // Cannot use GraphicsEnvironment.getLocalGraphicsEnvironment().getAvailableFontFamilyNames()
        // because we have to set the system property before Java initializes its fonts.
        // Use more low-level method to find the installed fonts.
        List<String> fontsAvail = new ArrayList<>();
        Path fontPath = FileSystems.getDefault().getPath(System.getenv("SYSTEMROOT"), "Fonts");
        try (DirectoryStream<Path> ds = Files.newDirectoryStream(fontPath)) {
            for (Path p : ds) {
                Path filename = p.getFileName();
                if (filename != null) {
                    fontsAvail.add(filename.toString().toUpperCase());
                }
            }
            fontsAvail.add(""); // for devanagari
        } catch (IOException ex) {
            Main.error(ex, false);
            Main.warn("extended font config - failed to load available Fonts");
            fontsAvail = null;
        }
        return fontsAvail;
    }

    @Override
    public Collection<FontEntry> getAdditionalFonts() {
        Collection<FontEntry> def = new ArrayList<>();
        def.add(new FontEntry("devanagari", "", "")); // just include in fallback list
                                                      // font already defined in template

        // Windows scripts: https://msdn.microsoft.com/en-us/goglobal/bb688099.aspx
        // IE default fonts: https://msdn.microsoft.com/en-us/library/ie/dn467844(v=vs.85).aspx

        // Windows 8/8.1 and later
        def.add(new FontEntry("javanese", "Javanese Text", "JAVATEXT.TTF"));           // ISO 639: jv
        def.add(new FontEntry("leelawadee", "Leelawadee", "LEELAWAD.TTF"));            // ISO 639: bug
        def.add(new FontEntry("myanmar", "Myanmar Text", "MMRTEXT.TTF"));              // ISO 639: my
        def.add(new FontEntry("nirmala", "Nirmala UI", "NIRMALA.TTF"));                // ISO 639: sat,srb
        def.add(new FontEntry("segoeui", "Segoe UI", "SEGOEUI.TTF"));                  // ISO 639: lis

        // Windows 7 and later
        def.add(new FontEntry("nko_tifinagh_vai_osmanya", "Ebrima", "EBRIMA.TTF"));    // ISO 639: ber. Nko only since Win 8
        def.add(new FontEntry("khmer1", "Khmer UI", "KHMERUI.TTF"));                   // ISO 639: km
        def.add(new FontEntry("lao1", "Lao UI", "LAOUI.TTF"));                         // ISO 639: lo
        def.add(new FontEntry("tai_le", "Microsoft Tai Le", "TAILE.TTF"));             // ISO 639: khb
        def.add(new FontEntry("new_tai_lue", "Microsoft New Tai Lue", "NTHAILU.TTF")); // ISO 639: khb

        // Windows Vista and later:
        def.add(new FontEntry("ethiopic", "Nyala", "NYALA.TTF"));                   // ISO 639: am,gez,ti
        def.add(new FontEntry("tibetan", "Microsoft Himalaya", "HIMALAYA.TTF"));    // ISO 639: bo,dz
        def.add(new FontEntry("cherokee", "Plantagenet Cherokee", "PLANTC.TTF"));   // ISO 639: chr
        def.add(new FontEntry("unified_canadian", "Euphemia", "EUPHEMIA.TTF"));     // ISO 639: cr,in
        def.add(new FontEntry("khmer2", "DaunPenh", "DAUNPENH.TTF"));               // ISO 639: km
        def.add(new FontEntry("khmer3", "MoolBoran", "MOOLBOR.TTF"));               // ISO 639: km
        def.add(new FontEntry("lao_thai", "DokChampa", "DOKCHAMP.TTF"));            // ISO 639: lo
        def.add(new FontEntry("mongolian", "Mongolian Baiti", "MONBAITI.TTF"));     // ISO 639: mn
        def.add(new FontEntry("oriya", "Kalinga", "KALINGA.TTF"));                  // ISO 639: or
        def.add(new FontEntry("sinhala", "Iskoola Pota", "ISKPOTA.TTF"));           // ISO 639: si
        def.add(new FontEntry("yi", "Yi Baiti", "MSYI.TTF"));                       // ISO 639: ii

        // Windows XP and later
        def.add(new FontEntry("gujarati", "Shruti", "SHRUTI.TTF"));
        def.add(new FontEntry("kannada", "Tunga", "TUNGA.TTF"));
        def.add(new FontEntry("gurmukhi", "Raavi", "RAAVI.TTF"));
        def.add(new FontEntry("telugu", "Gautami", "GAUTAMI.TTF"));
        def.add(new FontEntry("bengali", "Vrinda", "VRINDA.TTF"));                  // since XP SP2
        def.add(new FontEntry("syriac", "Estrangelo Edessa", "ESTRE.TTF"));         // ISO 639: arc
        def.add(new FontEntry("thaana", "MV Boli", "MVBOLI.TTF"));                  // ISO 639: dv
        def.add(new FontEntry("malayalam", "Kartika", "KARTIKA.TTF"));              // ISO 639: ml; since XP SP2

        // Windows 2000 and later
        def.add(new FontEntry("tamil", "Latha", "LATHA.TTF"));

        // Comes with MS Office & Outlook 2000. Good unicode coverage, so add if available.
        def.add(new FontEntry("arialuni", "Arial Unicode MS", "ARIALUNI.TTF"));

        return def;
    }
}