/**
 * Licensed to JumpMind Inc under one or more contributor
 * license agreements.  See the NOTICE file distributed
 * with this work for additional information regarding
 * copyright ownership.  JumpMind Inc licenses this file
 * to you under the GNU General Public License, version 3.0 (GPLv3)
 * (the "License"); you may not use this file except in compliance
 * with the License.
 *
 * You should have received a copy of the GNU General Public License,
 * version 3.0 (GPLv3) along with this library; if not, see
 * <http://www.gnu.org/licenses/>.
 *
 * 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.jumpmind.db.platform.redshift;

import java.util.HashMap;
import java.util.Map;

import javax.sql.DataSource;

import org.apache.commons.lang.StringUtils;
import org.jumpmind.db.platform.AbstractJdbcDatabasePlatform;
import org.jumpmind.db.platform.DatabaseNamesConstants;
import org.jumpmind.db.sql.SqlTemplateSettings;

public class RedshiftDatabasePlatform extends AbstractJdbcDatabasePlatform {

    private Map<String, String> sqlScriptReplacementTokens;

    public RedshiftDatabasePlatform(DataSource dataSource, SqlTemplateSettings settings) {
        super(dataSource, overrideSettings(settings));
        sqlScriptReplacementTokens = new HashMap<String, String>();
        sqlScriptReplacementTokens.put("current_timestamp", "sysdate");
    }

    protected static SqlTemplateSettings overrideSettings(SqlTemplateSettings settings) {
        if (settings == null) {
            settings = new SqlTemplateSettings();
        }
        settings.setQueryTimeout(0);
        return settings;
    }

    @Override
    protected RedshiftDdlBuilder createDdlBuilder() {
        return new RedshiftDdlBuilder();
    }

    @Override
    protected RedshiftDdlReader createDdlReader() {
        return new RedshiftDdlReader(this);
    }

    @Override
    protected RedshiftJdbcSqlTemplate createSqlTemplate() {
        return new RedshiftJdbcSqlTemplate(dataSource, settings, null, getDatabaseInfo());
    }

    public String getName() {
        return DatabaseNamesConstants.REDSHIFT;
    }
    
    public String getDefaultCatalog() {
        return null;
    }

    public String getDefaultSchema() {
        if (StringUtils.isBlank(defaultSchema)) {
            defaultSchema = (String) getSqlTemplate().queryForObject("select current_schema()", String.class);
        }
        return defaultSchema;
    }

    @Override
    public Map<String, String> getSqlScriptReplacementTokens() {
        return sqlScriptReplacementTokens;
    }

}