/**
 * Copyright (c) 2005-2011 by Appcelerator, Inc. All Rights Reserved.
 * Licensed under the terms of the Eclipse Public License (EPL).
 * Please see the license.txt included with this distribution for details.
 * Any modifications to this file must keep this entire header intact.
 */
package org.python.pydev.logging.ping;

import java.util.UUID;
import java.util.prefs.Preferences;

import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.preferences.ConfigurationScope;
import org.eclipse.core.runtime.preferences.IEclipsePreferences;
import org.eclipse.core.runtime.preferences.IPreferencesService;
import org.eclipse.jface.preference.IPreferenceStore;
import org.osgi.service.prefs.BackingStoreException;
import org.python.pydev.core.log.Log;
import org.python.pydev.plugin.PydevPlugin;


public class LogInfoProvider implements ILogPingProvider {

    public static final String TESTING_ID = "00000000-0000-0000-0000-000000000000";

    public long getCurrentTime() {
        return System.currentTimeMillis();
    }

    public String getApplicationId() {
        IPreferencesService preferencesService = Platform.getPreferencesService();
        if (preferencesService == null) {
            return TESTING_ID;
        }
        //Note: this is the same qualifier/id used by aptana plugins (so that we don't generate
        //a new one if there's already one registered).
        String qualifier = "com.aptana.db";
        String key = "ide-id";
        String id = preferencesService.getString(qualifier, key, null, null);

        if (id == null) {
            Preferences node = null;
            String keyNodeInPrefs = qualifier + "." + key;
            String keySettingInPrefs = "UUID";

            try {
                node = Preferences.userRoot().node(keyNodeInPrefs);
                id = node.get(keySettingInPrefs, "");
            } catch (Exception e1) {
                Log.log(e1);
            }
            IPreferenceStore preferenceStore = PydevPlugin.getDefault().getPreferenceStore();

            if (id == null || id.length() == 0) {
                id = preferenceStore.getString(keyNodeInPrefs + keySettingInPrefs);
            }

            if (id == null || id.length() == 0) {
                id = UUID.randomUUID().toString();
            }

            //if we got here it was not initially found, so, save it in all locations we look for!
            preferenceStore.putValue(keyNodeInPrefs + keySettingInPrefs, id);

            if (node != null) {
                try {
                    node.put(keySettingInPrefs, id);
                } catch (Exception e) {
                    Log.log(e);
                }
            }

            // saves the id in configuration scope so it's shared by all workspaces
            IEclipsePreferences prefs = (new ConfigurationScope()).getNode(qualifier);
            prefs.put(key, id);
            try {
                prefs.flush();
            } catch (BackingStoreException e) {
                Log.log(e);
            }
        }
        return id;
    }

}