/* 
 * _____________________________________________________________________________
 * 
 * INAF - OATS National Institute for Astrophysics - Astronomical Observatory of
 * Trieste INAF - IA2 Italian Center for Astronomical Archives
 * _____________________________________________________________________________
 * 
 * Copyright (C) 2016 Istituto Nazionale di Astrofisica
 * 
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License Version 3 as published by the
 * Free Software Foundation.
 * 
 * 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 General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */
package it.inaf.ia2.tsm.api;

import it.inaf.ia2.tsm.api.contract.DatabaseType;
import it.inaf.ia2.tsm.api.contract.TapSchema;
import it.inaf.ia2.tsm.api.contract.TapSchemaEntity;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Prepares an {@code INSERT} SQL query for a given {@link TapSchemaEntity} and
 * a given {@link TapSchema}.
 *
 * @author Sonia Zorba {@literal <zorba at oats.inaf.it>}
 */
public class InsertQueryBuilder {

    private static final Logger log = LoggerFactory.getLogger(InsertQueryBuilder.class);

    private final String query;
    private final List<EntityPropertyInfo> addedProperties;
    private final TapSchemaEntity tapSchemaEntity;

    protected InsertQueryBuilder(DatabaseType dbType, TapSchema tapSchema, TapSchemaEntity tapSchemaEntity, String tapSchemaTableName) {

        StringBuilder querySb = new StringBuilder("INSERT INTO ");
        querySb.append(TSMUtil.escapeName(tapSchema.getName(), dbType));
        querySb.append(".");
        querySb.append(TSMUtil.escapeName(tapSchemaTableName, dbType));
        querySb.append(" (");

        addedProperties = new ArrayList<>();
        this.tapSchemaEntity = tapSchemaEntity;

        boolean first = true;
        for (EntityPropertyInfo propertyInfo : EntityPropertyInfo.getEntityPropertiesInfo(tapSchemaTableName)) {
            if (propertyInfo.acceptVersion(tapSchema.getVersion())) {

                if (!first) {
                    querySb.append(", ");
                }
                querySb.append(propertyInfo.getPropertyKey());
                addedProperties.add(propertyInfo);
                first = false;
            }
        }
        querySb.append(") VALUES (");
        for (int i = 0; i < addedProperties.size(); i++) {
            if (i > 0) {
                querySb.append(",");
            }
            querySb.append("?");
        }
        querySb.append(")");

        query = querySb.toString();
    }

    protected void executeQuery(Connection connection) throws SQLException {

        try (PreparedStatement statement = connection.prepareStatement(query)) {
            log.debug("Executing query {}", query);
            int i = 1;
            for (EntityPropertyInfo property : addedProperties) {
                Object value = tapSchemaEntity.getValue(property.getPropertyKey(), property.getPropertyType());
                //log.debug("  [{}] {} ({})", i, value, property.getSqlType());
                statement.setObject(i, value, property.getSqlType());
                i++;
            }
            statement.executeUpdate();
        }
    }
}