/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License") +  you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.openmeetings.db.dao.label;

import java.io.Serializable;
import java.util.Date;
import java.util.List;

import javax.persistence.EntityManager;
import javax.persistence.NoResultException;
import javax.persistence.PersistenceContext;
import javax.persistence.TypedQuery;

import org.apache.openmeetings.db.entity.label.FieldLanguage;
import org.apache.openmeetings.util.OpenmeetingsVariables;
import org.red5.logging.Red5LoggerFactory;
import org.slf4j.Logger;
import org.springframework.transaction.annotation.Transactional;

/**
 * 
 * @author sebastianwagner
 * 
 */
@Transactional
public class FieldLanguageDao implements Serializable {

	private static final long serialVersionUID = -2714490167956230305L;

	private static final Logger log = Red5LoggerFactory.getLogger(
			FieldLanguageDao.class, OpenmeetingsVariables.webAppRootKey);

	@PersistenceContext
	private EntityManager em;

	public long getNextAvailableId() {
		TypedQuery<Long> q = em.createQuery("SELECT MAX(fl.language_id) from FieldLanguage fl", Long.class);
		return q.getSingleResult() + 1;
	}
	
	public FieldLanguage addLanguage(int langId, String langName, Boolean langRtl, String code) {
		try {
			FieldLanguage fl = new FieldLanguage();
			fl.setLanguage_id((long)langId);
			fl.setStarttime(new Date());
			fl.setDeleted(false);
			fl.setName(langName);
			fl.setRtl(langRtl);
			fl.setCode(code);

			fl = em.merge(fl);

			//Eagerly FETCH values list
			TypedQuery<FieldLanguage> q = em.createQuery("select fl from FieldLanguage fl LEFT JOIN FETCH fl.languageValues WHERE fl.language_id = :langId", FieldLanguage.class);
			q.setParameter("langId", langId);
			List<FieldLanguage> results = q.getResultList();
			
			return results != null && !results.isEmpty() ? results.get(0) : null;
		} catch (Exception ex2) {
			log.error("[addLanguage]: ", ex2);
		}
		return null;
	}

	public void emptyFieldLanguage() {
		try {
			TypedQuery<FieldLanguage> q = em.createQuery("delete from FieldLanguage", FieldLanguage.class);
			q.executeUpdate();
		} catch (Exception ex2) {
			log.error("[emptyFieldLanguage]: ", ex2);
		}
	}

	public void delete(FieldLanguage fl) {
		fl.setUpdatetime(new Date());
		fl.setDeleted(true);
		em.merge(fl);
	}

	public void updateLanguage(FieldLanguage fl) {
		if (fl.getLanguage_id() == null) {
			em.persist(fl);
		} else {
			if (!em.contains(fl)) {
				em.merge(fl);
			}
		}
	}

	public FieldLanguage getFieldLanguageById(Long language_id) {
		try {
			String hql = "select c from FieldLanguage as c "
					+ "WHERE c.deleted <> :deleted "
					+ "AND c.language_id = :language_id";
			TypedQuery<FieldLanguage> query = em.createQuery(hql, FieldLanguage.class);
			query.setParameter("deleted", true);
			query.setParameter("language_id", language_id);
			FieldLanguage fl = null;
			try {
				fl = query.getSingleResult();
			} catch (NoResultException ex) {
			}
			return fl;
		} catch (Exception ex2) {
			log.error("[getLanguageById]: ", ex2);
		}
		return null;
	}

	public List<FieldLanguage> getLanguages() {
		try {
			String hql = "select c from FieldLanguage as c "
					+ "WHERE c.deleted <> :deleted ";
			TypedQuery<FieldLanguage> query = em.createQuery(hql, FieldLanguage.class);
			query.setParameter("deleted", true);
			List<FieldLanguage> ll = query.getResultList();
			return ll;
		} catch (Exception ex2) {
			log.error("[getLanguages]: ", ex2);
		}
		return null;
	}

}