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/*
 * @(#)Preferences.java  1.0  September 17, 2005
 *
 * Copyright (c) 2005 Werner Randelshofer
 * Staldenmattweg 2, Immensee, CH-6405, Switzerland.
 * All rights reserved.
 *
 * This software is the confidential and proprietary information of
 * Werner Randelshofer. ("Confidential Information").  You shall not
 * disclose such Confidential Information and shall use it only in
 * accordance with the terms of the license agreement you entered into
 * with Werner Randelshofer.
 */

package com.jidesoft.plaf.aqua;

import com.jidesoft.plaf.UIDefaultsLookup;
import com.jidesoft.utils.SecurityUtils;

import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.logging.Logger;

/**
 * Utility class for accessing Mac OS X System Preferences.
 *
 * @author Werner Randelshofer
 * @version 1.0 September 17, 2005 Created.
 */
class AquaPreferences {
    private static final Logger LOGGER = Logger.getLogger(AquaPreferences.class.getName());
    private static HashMap prefs;

    /**
     * Creates a new instance.
     */
    public AquaPreferences() {
    }

    /**
     * Gets the preference value from Mac OS X's global preference. We added a way to override the setting. As long as
     * you add an entry to UIDefaults with "AquaPreference." prefix and the key, we will use the entry you added instead
     * of getting it from the system.
     *
     * @param key the key
     * @return the value.
     */
    public static String getString(String key) {
        String string = UIDefaultsLookup.getString("AquaPreference." + key);
        if (string != null) {
            return string;
        }
        return (String) get(key);
    }

    public static Object get(String key) {
        if (prefs == null) {
            prefs = new HashMap();
            loadGlobalPreferences();
        }
        //System.out.println("Preferences.get("+key+"):"+prefs.get(key));
        return prefs.get(key);
    }

    private static void loadGlobalPreferences() {
        // Load Mac OS X global preferences
        // --------------------------------

        // Fill preferences with default values, in case we fail to read them

        // Appearance: "1"=Blue, "6"=Graphite
        prefs.put("AppleAquaColorVariant", "1");
        // Highlight Color: (RGB float values)
        prefs.put("AppleHighlightColor", "0.709800 0.835300 1.000000");
        // Collation order: (Language code)
        prefs.put("AppleCollationOrder", "en");
        // Place scroll arrows: "Single"=At top and bottom, "DoubleMax"=Together
        prefs.put("AppleScrollBarVariant", "DoubleMax");
        // Click in the scroll bar to: "true"=Jump to here, "false"=Jump to next page
        prefs.put("AppleScrollerPagingBehavior", "false");

        File globalPrefsFile = new File(
                SecurityUtils.getProperty("user.home", "")
                        + "/Library/Preferences/.GlobalPreferences.plist"
        );
        try {
            XMLElement xml = readPList(globalPrefsFile);
            for (Iterator i0 = xml.iterateChildren(); i0.hasNext(); ) {
                XMLElement xml1 = (XMLElement) i0.next();

                String key = null;
                for (Iterator i1 = xml1.iterateChildren(); i1.hasNext(); ) {
                    XMLElement xml2 = (XMLElement) i1.next();
                    if (xml2.getName().equals("key")) {
                        key = xml2.getContent();
                    }
                    else {
                        if (key != null) {
                            //System.out.println("Preferences "+key+"="+xml2.getContent());
                            prefs.put(key, xml2.getContent());
                        }
                        key = null;
                    }
                }
            }
        }
        catch (IOException e) {
            LOGGER.warning("AquaPreferences failed to load Mac OS X global system preferences - " + e.getLocalizedMessage());
        }
        catch (Exception e) {
            LOGGER.warning("AquaPreferences failed to load Mac OS X global system preferences - " + e.getLocalizedMessage());
        }
    }

    /**
     * Reads the specified PList file and returns it as an XMLElement. This method can deal with XML encoded and binary
     * encoded PList files.
     */
    private static XMLElement readPList(File plistFile) throws IOException {
        FileReader reader = null;
        XMLElement xml = null;
        try {
            reader = new FileReader(plistFile);
            xml = new XMLElement(new HashMap(), false, false);
            try {
                xml.parseFromReader(reader);
            }
            catch (XMLParseException e) {
                xml = new BinaryPListParser().parse(plistFile);
            }
        }
        finally {
            if (reader != null) {
                reader.close();
            }
        }
        return xml;
    }
}