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/******************************************************************************
 * Copyright 2009-2018 Exactpro (Exactpro Systems Limited)
 *
 * Licensed 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 com.exactpro.sf.storage;

import java.io.Serializable;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Timestamp;
import java.sql.Types;
import java.text.ParseException;
import java.time.Instant;
import java.util.Date;

import org.hibernate.HibernateException;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.engine.spi.SharedSessionContractImplementor;
import org.hibernate.type.StringType;
import org.hibernate.usertype.UserType;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class TimestampToString implements UserType, Serializable{

	/**
	 *
	 */
	private static final long serialVersionUID = 638623394280381838L;

	private static final Logger logger = LoggerFactory.getLogger(TimestampToString.class);

	@Override
	public Object assemble(Serializable cached, Object obj) throws HibernateException {
		return cached;
	}

	@Override
	public Object deepCopy(Object obj) throws HibernateException {
        if(obj == null) {
            return null;
        }
		Date orig = (Date) obj;
		return new Timestamp(orig.getTime());
	}

	@Override
	public Serializable disassemble(Object obj) throws HibernateException {
		return (Serializable) obj;
	}

	@Override
	public boolean equals(Object a, Object b) throws HibernateException {
		return a.equals(b);
	}

	@Override
	public int hashCode(Object obj) throws HibernateException {
		return obj.hashCode();
	}

	@Override
	public boolean isMutable() {
		return false;
	}

	@Override
	public Object nullSafeGet(ResultSet ps, String[] names, SharedSessionContractImplementor s, Object owner)
			throws HibernateException, SQLException {
		String value = StringType.INSTANCE.nullSafeGet(ps, names[0], s);
		Date time = null;
		try {
			time = MessageRow.TIMESTAMP_FORMAT.get().parse(value);
		} catch (ParseException e) {
			logger.error(e.getMessage(), e);
		}
        return time != null ? new Timestamp(time.getTime()) : null;
	}

	@Override
	public void nullSafeSet(PreparedStatement ps, Object value, int index, SharedSessionContractImplementor s)
			throws HibernateException, SQLException {
        StringType.INSTANCE.set(ps, value == null ? "" : dateToString((Date)value), index, s);
	}

    public static String dateToString(Date value) {
        return MessageRow.TIMESTAMP_FORMAT.get().format(value);
    }

    public static String instantToString(Instant value) {
        return dateToString(new Date(value.toEpochMilli()));
    }

	@Override
	public Object replace(Object original, Object target, Object owner) throws HibernateException {
		return original;
	}

	@Override
	public Class returnedClass() {
		return Timestamp.class;
	}

	@Override
	public int[] sqlTypes() {
		return new int[] { Types.VARCHAR };
	}

}