/*
 * Bolo - A stable and beautiful blogging system based in Solo.
 * Copyright (c) 2020, https://github.com/adlered
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
package org.b3log.solo.service;

import org.b3log.latke.ioc.Inject;
import org.b3log.latke.logging.Level;
import org.b3log.latke.logging.Logger;
import org.b3log.latke.repository.Transaction;
import org.b3log.latke.service.LangPropsService;
import org.b3log.latke.service.ServiceException;
import org.b3log.latke.service.annotation.Service;
import org.b3log.solo.model.Option;
import org.b3log.solo.repository.OptionRepository;
import org.b3log.solo.util.Skins;
import org.json.JSONObject;

import java.util.Set;

/**
 * Skin management service.
 *
 * @author <a href="http://88250.b3log.org">Liang Ding (Solo Author)</a>
 * @author <a href="https://github.com/adlered">adlered (Bolo Author)</a>
 * @since 3.5.0
 */
@Service
public class SkinMgmtService {

    /**
     * Logger.
     */
    private static final Logger LOGGER = Logger.getLogger(SkinMgmtService.class);

    /**
     * Option query service.
     */
    @Inject
    private OptionQueryService optionQueryService;

    /**
     * Option repository.
     */
    @Inject
    private OptionRepository optionRepository;

    /**
     * Language service.
     */
    @Inject
    private LangPropsService langPropsService;

    /**
     * Loads skins.
     *
     * @param skin the specified skin
     * @throws Exception exception
     */
    public void loadSkins(final JSONObject skin) throws Exception {
        final Set<String> skinDirNames = Skins.getSkinDirNames();
        if (!UpgradeService.boloFastMigration) {
            final String currentSkinDirName = skin.optString(Option.ID_C_SKIN_DIR_NAME);
            if (!skinDirNames.contains(currentSkinDirName)) {
                LOGGER.log(Level.WARN, "Not found skin [dirName={0}] configured, try to use default skin [dirName="
                        + Option.DefaultPreference.DEFAULT_SKIN_DIR_NAME + "] instead", currentSkinDirName);
                if (!skinDirNames.contains(Option.DefaultPreference.DEFAULT_SKIN_DIR_NAME)) {
                    LOGGER.log(Level.ERROR, "Not found default skin [dirName=" + Option.DefaultPreference.DEFAULT_SKIN_DIR_NAME
                            + "], please redeploy your Solo and make sure contains the default skin.");
                    System.exit(-1);
                }

                skin.put(Option.ID_C_SKIN_DIR_NAME, Option.DefaultPreference.DEFAULT_SKIN_DIR_NAME);
                updateSkin(skin);
            }

            final String currentMobileSkinDirName = skin.optString(Option.ID_C_MOBILE_SKIN_DIR_NAME);
            if (!skinDirNames.contains(currentMobileSkinDirName)) {
                LOGGER.log(Level.WARN, "Not found mobile skin [dirName={0}] configured, try to use default mobile skin [dirName="
                        + Option.DefaultPreference.DEFAULT_MOBILE_SKIN_DIR_NAME + "] instead", currentMobileSkinDirName);
                if (!skinDirNames.contains(Option.DefaultPreference.DEFAULT_MOBILE_SKIN_DIR_NAME)) {
                    LOGGER.log(Level.ERROR, "Not found default mobile skin [dirName=" + Option.DefaultPreference.DEFAULT_MOBILE_SKIN_DIR_NAME
                            + "], please redeploy your Solo and make sure contains the default mobile skin.");
                    System.exit(-1);
                }

                skin.put(Option.ID_C_MOBILE_SKIN_DIR_NAME, Option.DefaultPreference.DEFAULT_MOBILE_SKIN_DIR_NAME);
                updateSkin(skin);
            }
        }
    }

    /**
     * Updates the skin with the specified skin.
     *
     * @param skin the specified skin
     * @throws ServiceException service exception
     */
    public void updateSkin(final JSONObject skin) throws ServiceException {
        final Transaction transaction = optionRepository.beginTransaction();
        try {
            final JSONObject skinDirNameOpt = optionRepository.get(Option.ID_C_SKIN_DIR_NAME);
            skinDirNameOpt.put(Option.OPTION_VALUE, skin.optString(Option.ID_C_SKIN_DIR_NAME));
            optionRepository.update(Option.ID_C_SKIN_DIR_NAME, skinDirNameOpt);

            final JSONObject mobileSkinDirNameOpt = optionRepository.get(Option.ID_C_MOBILE_SKIN_DIR_NAME);
            mobileSkinDirNameOpt.put(Option.OPTION_VALUE, skin.optString(Option.ID_C_MOBILE_SKIN_DIR_NAME));
            optionRepository.update(Option.ID_C_MOBILE_SKIN_DIR_NAME, mobileSkinDirNameOpt);

            transaction.commit();
        } catch (final Exception e) {
            if (transaction.isActive()) {
                transaction.rollback();
            }

            LOGGER.log(Level.ERROR, "Updates skin failed", e);
            throw new ServiceException(langPropsService.get("updateFailLabel"));
        }
    }
}
