/*
 * Copyright (c) 2015, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
 *
 * WSO2 Inc. 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.wso2.carbon.ml.database.internal.ds;

import java.io.File;

import javax.sql.DataSource;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.wso2.carbon.utils.dbcreator.DatabaseCreator;

/**
 * Responsible for creating the ML db.
 */
public class LocalDatabaseCreator extends DatabaseCreator {

    private static final Log log = LogFactory.getLog(LocalDatabaseCreator.class);
    private DataSource dataSource;
    
    public LocalDatabaseCreator(DataSource dataSource) {
        super(dataSource);
        this.dataSource = dataSource;
    }

    /**
     * Creates ML database if the script exists; returns otherwise.
     *
     * @throws Exception
     */
    public void createRegistryDatabase() throws Exception{

        String databaseType = DatabaseCreator.getDatabaseType(this.dataSource.getConnection());

        String scripPath = getDbScriptLocation(databaseType);
        File scripFile = new File(scripPath);
        if(scripFile.exists()){
            super.createRegistryDatabase();
        }else {
            return;
        }
    }

    protected String getDbScriptLocation(String databaseType) {
        String scriptName = databaseType + ".sql";
        if (log.isDebugEnabled()) {
            log.debug("Loading database script from :" + scriptName);
        }
        String carbonHome = System.getProperty("carbon.home");
        return  carbonHome +
                "/dbscripts/ml/" + scriptName;

    }
}
