/*
 * 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.data.basic.dao;

import java.util.Date;
import java.util.List;

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

import org.apache.openmeetings.OpenmeetingsVariables;
import org.apache.openmeetings.persistence.beans.basic.OmTimeZone;
import org.apache.openmeetings.persistence.beans.user.User;
import org.red5.logging.Red5LoggerFactory;
import org.slf4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.transaction.annotation.Transactional;

@Transactional
public class OmTimeZoneDao {

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

	@PersistenceContext
	private EntityManager em;

	@Autowired
	private ConfigurationDao configurationDao;

	/**
	 * Get a default {@link OmTimeZone}, if user is set, it will return the
	 * {@link OmTimeZone} of the user, if not it will try to load it from the
	 * server's config
	 * 
	 * @param user
	 *            can be null
	 * @return
	 */
	public OmTimeZone getDefaultOmTimeZone(User user) {
		
		if (user != null && user.getOmTimeZone() != null) {
			return user.getOmTimeZone();
		}
		
		String jNameTimeZone = configurationDao.getConfValue(
				"default.timezone", String.class, "Europe/Berlin");
		
		OmTimeZone omTimeZone = this.getOmTimeZone(jNameTimeZone);
		if (omTimeZone == null) {
			throw new RuntimeException("Could not find default.timezone, misconfiguration of database");
		}
		return omTimeZone;
	}

	public Long addOmTimeZone(String name, String label, String iCal,
			Integer orderId) {
		try {

			OmTimeZone omTimeZone = new OmTimeZone();

			omTimeZone.setJname(name);
			omTimeZone.setLabel(label);
			omTimeZone.setIcal(iCal);
			omTimeZone.setOrderId(orderId);
			omTimeZone.setInserted(new Date());

			omTimeZone = em.merge(omTimeZone);
			Long omTimeZoneId = omTimeZone.getOmtimezoneId();

			return omTimeZoneId;

		} catch (Exception ex) {
			log.error("[addOmTimeZone]", ex);
		}
		return null;
	}

	public List<OmTimeZone> getOmTimeZones() {
		try {
			String hql = "select sl from OmTimeZone as sl "
					+ "ORDER BY sl.orderId";

			TypedQuery<OmTimeZone> query = em.createQuery(hql, OmTimeZone.class);
			List<OmTimeZone> sList = query.getResultList();

			for (OmTimeZone omTimeZone : sList) {
				omTimeZone.setFrontEndLabel(omTimeZone.getJname() + " ("
						+ omTimeZone.getLabel() + ")");
			}

			return sList;

		} catch (Exception ex2) {
			log.error("[getOmTimeZones]: ", ex2);
		}
		return null;
	}

	public OmTimeZone getOmTimeZone(String jname) {
		try {
			String hql = "select sl from OmTimeZone as sl "
					+ "WHERE sl.jname LIKE :jname "
					+ "OR sl.ical LIKE :jname";
			TypedQuery<OmTimeZone> query = em.createQuery(hql, OmTimeZone.class);
			query.setParameter("jname", jname);
			List<OmTimeZone> sList = query.getResultList();

			if (sList.size() > 0) {
				return sList.get(0);
			}

		} catch (Exception ex2) {
			log.error("[getOmTimeZone]: ", ex2);
		}
		return null;
	}

	public OmTimeZone getOmTimeZoneByIcal(String ical) {
		try {
			String hql = "select sl from OmTimeZone as sl "
					+ "WHERE sl.ical LIKE :ical";
			TypedQuery<OmTimeZone> query = em.createQuery(hql, OmTimeZone.class);
			query.setParameter("ical", ical);
			List<OmTimeZone> sList = query.getResultList();

			if (sList.size() > 0) {
				return sList.get(0);
			}

		} catch (Exception ex2) {
			log.error("[getOmTimeZoneByIcal]: ", ex2);
		}
		return null;
	}

	public OmTimeZone getOmTimeZoneById(Long omtimezoneId) {
		try {
			String hql = "select sl from OmTimeZone as sl "
					+ "WHERE sl.omtimezoneId = :omtimezoneId";
			TypedQuery<OmTimeZone> query = em.createQuery(hql, OmTimeZone.class);
			query.setParameter("omtimezoneId", omtimezoneId);
			List<OmTimeZone> sList = query.getResultList();

			if (sList.size() > 0) {
				return sList.get(0);
			}

		} catch (Exception ex2) {
			log.error("[getOmTimeZoneById]: ", ex2);
		}
		return null;
	}

}