/*
 * Copyright (C) 2011 eXo Platform SAS.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.exoplatform.portal.mop.importer;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Locale;

import org.exoplatform.portal.config.model.NavigationFragment;
import org.exoplatform.portal.config.model.PageNavigation;
import org.exoplatform.portal.mop.SiteKey;
import org.exoplatform.portal.mop.navigation.NavigationContext;
import org.exoplatform.portal.mop.navigation.NavigationState;
import org.exoplatform.portal.mop.service.NavigationService;
import org.exoplatform.portal.mop.storage.DescriptionStorage;

/**
 * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
 */
public class NavigationImporter {

    /** . */
    private final Locale portalLocale;

    /** . */
    private final PageNavigation src;

    /** . */
    private final NavigationService service;

    /** . */
    private final ImportMode mode;

    /** . */
    private final DescriptionStorage descriptionStorage;

    public NavigationImporter(Locale portalLocale, ImportMode mode, PageNavigation src, NavigationService service,
                              DescriptionStorage descriptionStorage) {
        this.portalLocale = portalLocale;
        this.mode = mode;
        this.src = src;
        this.service = service;
        this.descriptionStorage = descriptionStorage;
    }

    public void perform() {

        //
        SiteKey key = new SiteKey(src.getOwnerType(), src.getOwnerId());

        //
        NavigationContext dst = service.loadNavigation(key);

        //
        switch (mode) {
            case CONSERVE:
                if (dst == null) {
                    dst = new NavigationContext(key, new NavigationState(src.getPriority()));
                    service.saveNavigation(dst);
                } else {
                    dst = null;
                }
                break;
            case INSERT:
                if (dst == null) {
                    dst = new NavigationContext(key, new NavigationState(src.getPriority()));
                    service.saveNavigation(dst);
                }
                break;
            case MERGE:
            case OVERWRITE:
                dst = new NavigationContext(key, new NavigationState(src.getPriority()));
                service.saveNavigation(dst);
                break;
            default:
                throw new AssertionError();
        }

        //
        if (dst != null) {
            ArrayList<NavigationFragment> fragments = src.getFragments();
            if (fragments != null && fragments.size() > 0) {
                for (NavigationFragment fragment : fragments) {
                    String parentURI = fragment.getParentURI();

                    // Find something better than that for building the path
                    List<String> path;
                    if (parentURI != null) {
                        path = new ArrayList<String>();
                        String[] names = parentURI.split("/");
                        for (String name : names) {
                            if (name.length() > 0) {
                                path.add(name);
                            }
                        }
                    } else {
                        path = Collections.emptyList();
                    }

                    //
                    NavigationFragmentImporter fragmentImporter = new NavigationFragmentImporter(path.toArray(new String[path
                            .size()]), service, dst.getKey(), portalLocale, descriptionStorage, fragment, mode.config);

                    //
                    fragmentImporter.perform();
                }
            }
        }
    }
}
