/* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
 * Software engineering by Intevation GmbH
 *
 * This file is Free Software under the GNU AGPL (>=v3)
 * and comes with ABSOLUTELY NO WARRANTY! Check out the
 * documentation coming with Dive4Elements River for details.
 */

package org.dive4elements.river.backend;

import org.dive4elements.artifacts.common.utils.Config;

public class SedDBCredentials extends Credentials {
    public static final String XPATH_USER = "/artifact-database/seddb-database/user/text()";

    public static final String XPATH_PASSWORD = "/artifact-database/seddb-database/password/text()";

    public static final String XPATH_DIALECT = "/artifact-database/seddb-database/dialect/text()";

    public static final String XPATH_DRIVER = "/artifact-database/seddb-database/driver/text()";

    public static final String XPATH_URL = "/artifact-database/seddb-database/url/text()";

    public static final String XPATH_CONNECTION_INIT_SQLS = "/artifact-database/seddb-database/connection-init-sqls/text()";

    public static final String XPATH_VALIDATION_QUERY = "/artifact-database/seddb-database/validation-query/text()";

    public static final String XPATH_MAX_WAIT = "/artifact-database/seddb-database/max-wait/text()";

    public static final String DEFAULT_USER = System.getProperty("flys.seddb.user", "seddb");

    public static final String DEFAULT_PASSWORD = System.getProperty("flys.seddb.password", "seddb");

    public static final String DEFAULT_DIALECT = System.getProperty("flys.seddb.dialect", "org.hibernate.dialect.PostgreSQLDialect");

    public static final String DEFAULT_DRIVER = System.getProperty("flys.seddb.driver", "org.postgresql.Driver");

    public static final String DEFAULT_URL = System.getProperty("flys.seddb.url", "jdbc:postgresql://localhost:5432/seddb");

    public static final String DEFAULT_CONNECTION_INIT_SQLS = System.getProperty("flys.seddb.connection.init.sqls");

    public static final String DEFAULT_VALIDATION_QUERY = System.getProperty("flys.seddb.connection.validation.query");

    public static final String DEFAULT_MAX_WAIT = System.getProperty("flys.seddb.connection.max.wait");

    public static final Class[] CLASSES = {};

    private static Credentials instance;

    public SedDBCredentials() {
    }

    public SedDBCredentials(final String user, final String password, final String dialect, final String driver, final String url,
            final String connectionInitSqls, final String validationQuery, final String maxWait) {
        super(user, password, dialect, driver, url, connectionInitSqls, validationQuery, maxWait, CLASSES);
    }

    public static synchronized Credentials getInstance() {
        if (instance == null) {
            final String user = Config.getStringXPath(XPATH_USER, DEFAULT_USER);
            final String password = Config.getStringXPath(XPATH_PASSWORD, DEFAULT_PASSWORD);
            final String dialect = Config.getStringXPath(XPATH_DIALECT, DEFAULT_DIALECT);
            final String driver = Config.getStringXPath(XPATH_DRIVER, DEFAULT_DRIVER);
            final String url = Config.getStringXPath(XPATH_URL, DEFAULT_URL);
            final String connectionInitSqls = Config.getStringXPath(XPATH_CONNECTION_INIT_SQLS, DEFAULT_CONNECTION_INIT_SQLS);
            final String validationQuery = Config.getStringXPath(XPATH_VALIDATION_QUERY, DEFAULT_VALIDATION_QUERY);
            final String maxWait = Config.getStringXPath(XPATH_MAX_WAIT, DEFAULT_MAX_WAIT);

            instance = new SedDBCredentials(user, password, dialect, driver, url, connectionInitSqls, validationQuery, maxWait);
        }
        return instance;
    }

    public static Credentials getDefault() {
        return new SedDBCredentials(DEFAULT_USER, DEFAULT_PASSWORD, DEFAULT_DIALECT, DEFAULT_DRIVER, DEFAULT_URL, DEFAULT_CONNECTION_INIT_SQLS,
                DEFAULT_VALIDATION_QUERY, DEFAULT_MAX_WAIT);
    }
}
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