/*
 * Jalview - A Sequence Alignment Editor and Viewer
 * Copyright (C) 2005 AM Waterhouse, J Procter, G Barton, M Clamp, S Searle
 *
 * 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 jalview.bin;

import java.io.*;

import java.util.*;


/**
 * Stores and retrieves Jalview Application Properties
 * <br><br>Current properties include:
 * <br>logs.Axis.Level - one of the stringified Levels for log4j controlling the logging level for axis (used for web services)
 * <br>logs.Castor.Level - one of the stringified Levels for log4j controlling the logging level for castor (used for serialization)
 * <br>jalview.browser - used in the jalview.utils.browserLauncher class if it doesn't know what else to do.
 * <br>SCREEN_WIDTH,SCREEN_HEIGHT,SCREEN_Y=285,SCREEN_X=371,SHOW_FULLSCREEN
 * FONT_NAME,FONT_SIZE,FONT_STYLE,GAP_SYMBOL,LAST_DIRECTORY,USER_DEFINED_COLOUR
 * SHOW_FULL_ID,SHOW_IDENTITY,SHOW_QUALITY,SHOW_ANNOTATIONS,SHOW_CONSERVATION,
 * DEFAULT_COLOUR,DEFAULT_FILE_FORMAT,STARTUP_FILE,SHOW_STARTUP_FILE

 * @author $author$
 * @version $Revision$
 */
public class Cache
{
    /** Current release tag */
    public static String VERSION = "AW Test";

    /** Date Jalview was last packaged, else compilation date of Cache.class */
    public static String BUILD_DATE = "";

    /** Jalview Properties */
    public static Properties applicationProperties;

    /** Default file is  ~/.jalview_properties */
    static String propertiesFile;

    /** Called when Jalview is started */
    public static void loadProperties(String propsFile)
    {
      propertiesFile = propsFile;
      if (propsFile == null)
      {
        propertiesFile = System.getProperty("user.home") + "/.jalview_properties";
      }


        // get last build time.
        long date = 0;

        try
        {
            String localFile = Cache.class.getProtectionDomain().getCodeSource()
                                          .getLocation().toString();
            localFile = localFile.concat("!/");

            String tmpString = "jar:";
            String localJarFileString = tmpString.concat(localFile);
            java.net.URL localJarFileURL = new java.net.URL(localJarFileString);
            java.net.JarURLConnection localJarFile = (java.net.JarURLConnection) localJarFileURL.openConnection();
            date = localJarFile.getLastModified();
        }
        catch (Exception ex)
        {
            ex.printStackTrace();
        }

        if (date == 0)
        {
            // this is called for unpackaged class files, ie not in a Jar file
            // InstallAnywhere version will find build date this way
            // not entirely accurate as it only tells you when Cache.class was last compiled
            java.io.File f = new java.io.File(System.getProperty("user.dir") +
                    "/jalview/bin/Cache.class");
            date = f.lastModified();
        }

        if (date != 0)
        {
            BUILD_DATE = new Date(date).toString();
        }

        applicationProperties = new Properties();

        try
        {
            FileInputStream in = new FileInputStream(propertiesFile);
            applicationProperties = new Properties();
            applicationProperties.load(in);
            in.close();
        }
        catch (Exception ex)
        {
        }
    }

    /**
     * Gets Jalview application property of given key. Returns null
     * if key not found
     *
     * @param key Name of property
     *
     * @return Property value
     */
    public static String getProperty(String key)
    {
        return applicationProperties.getProperty(key);
    }

    /**
     * Stores property in the file "HOME_DIR/.jalview_properties"
     *
     * @param key Name of object
     * @param obj String value of property
     *
     * @return String value of property
     */
    public static String setProperty(String key, String obj)
    {
        try
        {
            FileOutputStream out = new FileOutputStream(propertiesFile);

            applicationProperties.setProperty(key, obj);

            applicationProperties.store(out, "---JalviewX Properties File---");
            out.close();
        }
        catch (Exception ex)
        {
        }

        return obj;
    }
}