/*
    * DavMail POP/IMAP/SMTP/CalDav/LDAP Exchange Gateway
    * Copyright (C) 2012  Mickael Guessant
    *
    * This program 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 2
    * of the License, or (at your option) any later version.
    *
   * This program 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 this program; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
   */
  package davmail.ui;
  
  import davmail.ui.tray.DavGatewayTray;
  import davmail.util.IOUtil;
  import org.apache.log4j.Logger;
  
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.FileOutputStream;
  import java.io.IOException;
  import java.nio.charset.StandardCharsets;
  
  /**
   * Handle OSX Info.plist file access
   */
  public class OSXInfoPlist {
      protected static final Logger LOGGER = Logger.getLogger(OSXInfoPlist.class);
      protected static final String INFO_PLIST_PATH = "../Info.plist";
  
      private OSXInfoPlist() {
      }
  
      protected static boolean isOSX() {
          return System.getProperty("os.name").toLowerCase().startsWith("mac os x");
      }
  
      protected static String getInfoPlistContent() throws IOException {
          try (FileInputStream fileInputStream = new FileInputStream(getInfoPlistPath())) {
              return new String(IOUtil.readFully(fileInputStream), StandardCharsets.UTF_8);
          }
      }
  
      /**
       * Test current LSUIElement (hide from dock) value
       *
       * @return true if application is hidden from dock
       */
      public static boolean isHideFromDock() {
          boolean result = false;
          try {
              result = isOSX() && getInfoPlistContent().contains("<key>LSUIElement</key><string>1</string>");
          } catch (IOException e) {
              LOGGER.warn("Unable to update Info.plist", e);
          }
          return result;
      }
  
      /**
       * Update LSUIElement (hide from dock) value
       *
       * @param hideFromDock new hide from dock value
       */
      public static void setOSXHideFromDock(boolean hideFromDock) {
          try {
              if (isOSX()) {
                  boolean currentHideFromDock = isHideFromDock();
                  if (currentHideFromDock != hideFromDock) {
                      String content = getInfoPlistContent();
                      try (FileOutputStream fileOutputStream = new FileOutputStream(getInfoPlistPath())) {
                          fileOutputStream.write(content.replaceFirst(
                                  "<key>LSUIElement</key><string>" + (currentHideFromDock ? "1" : "0") + "</string>",
                                  "<key>LSUIElement</key><string>" + (hideFromDock ? "1" : "0") + "</string>").getBytes(StandardCharsets.UTF_8));
                      }
                  }
              }
          } catch (IOException e) {
              LOGGER.warn("Unable to update Info.plist", e);
          }
      }
  
      private static String getInfoPlistPath() throws IOException {
          // code location points to davmail.jar
          String codeLocation = DavGatewayTray.class.getProtectionDomain().getCodeSource().getLocation().getPath();
          File file = new File(codeLocation);
          if (file.exists()) {
              // code location is absolute path
              return file.getParent() + File.separator + INFO_PLIST_PATH;
          }
          file = new File(INFO_PLIST_PATH);
          if (file.exists()) {
              // fallback to relative path
             return INFO_PLIST_PATH;
         }
         throw new IOException("Info.plist file not found");
     }
 }