/*
 *
 *    OPEN-XCHANGE legal information
 *
 *    All intellectual property rights in the Software are protected by
 *    international copyright laws.
 *
 *
 *    In some countries OX, OX Open-Xchange, open xchange and OXtender
 *    as well as the corresponding Logos OX Open-Xchange and OX are registered
 *    trademarks of the Open-Xchange, Inc. group of companies.
 *    The use of the Logos is not covered by the GNU General Public License.
 *    Instead, you are allowed to use these Logos according to the terms and
 *    conditions of the Creative Commons License, Version 2.5, Attribution,
 *    Non-commercial, ShareAlike, and the interpretation of the term
 *    Non-commercial applicable to the aforementioned license is published
 *    on the web site http://www.open-xchange.com/EN/legal/index.html.
 *
 *    Please make sure that third-party modules and libraries are used
 *    according to their respective licenses.
 *
 *    Any modifications to this package must retain all copyright notices
 *    of the original copyright holder(s) for the original code used.
 *
 *    After any such modifications, the original and derivative code shall remain
 *    under the copyright of the copyright holder(s) and/or original author(s)per
 *    the Attribution and Assignment Agreement that can be located at
 *    http://www.open-xchange.com/EN/developer/. The contributing author shall be
 *    given Attribution for the derivative code and a license granting use.
 *
 *     Copyright (C) 2004-2010 Open-Xchange, Inc.
 *     Mail: info@open-xchange.com
 *
 *
 *     This program is free software; you can redistribute it and/or modify it
 *     under the terms of the GNU General Public License, Version 2 as published
 *     by the Free Software Foundation.
 *
 *     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., 59
 *     Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 */

package com.openexchange.multiple.handlers;

import java.util.Collection;
import java.util.Collections;
import java.util.Date;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import com.openexchange.groupware.AbstractOXException;
import com.openexchange.groupware.settings.Setting;
import com.openexchange.groupware.settings.impl.ConfigTree;
import com.openexchange.groupware.settings.impl.SettingStorage;
import com.openexchange.multiple.MultipleHandler;
import com.openexchange.multiple.MultipleHandlerFactoryService;
import com.openexchange.multiple.PathAware;
import com.openexchange.tools.session.ServerSession;


/**
 * {@link ConfigFactoryService}
 *
 * @author <a href="mailto:francisco.laguna@open-xchange.com">Francisco Laguna</a>
 */
public class ConfigFactoryService implements MultipleHandlerFactoryService {

    public MultipleHandler createMultipleHandler() {
        return new ConfigMultipleHandler();
    }

    public String getSupportedModule() {
        return "config";
    }
    
    private static final class ConfigMultipleHandler implements MultipleHandler, PathAware {

        private String path;

        public void close() {
            
        }

        public Date getTimestamp() {
            return null;
        }

        public Collection<AbstractOXException> getWarnings() {
            return Collections.emptyList();
        }

        public Object performRequest(String action, JSONObject jsonObject, ServerSession session, boolean secure) throws AbstractOXException, JSONException {
           
            final SettingStorage stor = SettingStorage.getInstance(session);
            Setting setting = ConfigTree.getSettingByPath(path);
            stor.readValues(setting);
            return convert2JS(setting);
        }
        
        /**
         * Converts a tree of settings into the according java script objects.
         * @param setting Tree of settings.
         * @return java script object representing the setting tree.
         * @throws JSONException if the conversion to java script objects fails.
         */
        private static Object convert2JS(Setting setting) throws JSONException {
            Object retval = null;
            if (setting.isLeaf()) {
                final Object[] multiValue = setting.getMultiValue();
                if (null == multiValue) {
                    final Object singleValue = setting.getSingleValue();
                    if (null == singleValue) {
                        retval = JSONObject.NULL;
                    } else if (singleValue instanceof JSONObject) {
                        retval = singleValue;
                    } else {
                        try {
                            retval = new JSONObject(singleValue.toString());
                        } catch (JSONException e) {
                            retval = singleValue;
                        }
                    }
                } else {
                    final JSONArray array = new JSONArray();
                    for (final Object value : multiValue) {
                        array.put(value);
                    }
                    retval = array;
                }
            } else {
                final JSONObject json = new JSONObject();
                for (final Setting subSetting : setting.getElements()) {
                    json.put(subSetting.getName(), convert2JS(subSetting));
                }
                retval = json;
            }
            return retval;
        }

        public void setPath(String path) {
            if(path == null) {
                path = "";
            }
            if (path.length() > 0 && path.charAt(0) == '/') {
                path = path.substring(1);
            }
            if (path.endsWith("/")) {
                path = path.substring(0, path.length() - 1);
            }
            this.path = path;
        }

        
    }

}
