/*
 * 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 io.prestosql.plugin.mysql;

import com.google.inject.Binder;
import com.google.inject.Provides;
import com.google.inject.Scopes;
import com.google.inject.Singleton;
import com.mysql.jdbc.Driver;
import io.airlift.configuration.AbstractConfigurationAwareModule;
import io.prestosql.plugin.jdbc.BaseJdbcConfig;
import io.prestosql.plugin.jdbc.ConnectionFactory;
import io.prestosql.plugin.jdbc.DriverConnectionFactory;
import io.prestosql.plugin.jdbc.JdbcClient;

import java.sql.SQLException;
import java.util.Optional;
import java.util.Properties;

import static com.google.common.base.Preconditions.checkArgument;
import static io.airlift.configuration.ConfigBinder.configBinder;
import static io.prestosql.plugin.jdbc.DriverConnectionFactory.basicConnectionProperties;

public class MySqlClientModule
        extends AbstractConfigurationAwareModule
{
    @Override
    protected void setup(Binder binder)
    {
        binder.bind(JdbcClient.class).to(MySqlClient.class).in(Scopes.SINGLETON);
        ensureCatalogIsEmpty(buildConfigObject(BaseJdbcConfig.class).getConnectionUrl());
        configBinder(binder).bindConfig(MySqlConfig.class);
    }

    private static void ensureCatalogIsEmpty(String connectionUrl)
    {
        try {
            Driver driver = new Driver();
            Properties urlProperties = driver.parseURL(connectionUrl, null);
            checkArgument(urlProperties != null, "Invalid JDBC URL for MySQL connector");
            checkArgument(driver.database(urlProperties) == null, "Database (catalog) must not be specified in JDBC URL for MySQL connector");
        }
        catch (SQLException e) {
            throw new RuntimeException(e);
        }
    }

    @Provides
    @Singleton
    public static ConnectionFactory createConnectionFactory(BaseJdbcConfig config, MySqlConfig mySqlConfig)
            throws SQLException
    {
        Properties connectionProperties = basicConnectionProperties(config);
        connectionProperties.setProperty("useInformationSchema", "true");
        connectionProperties.setProperty("nullCatalogMeansCurrent", "false");
        connectionProperties.setProperty("useUnicode", "true");
        connectionProperties.setProperty("characterEncoding", "utf8");
        connectionProperties.setProperty("tinyInt1isBit", "false");
        if (mySqlConfig.isAutoReconnect()) {
            connectionProperties.setProperty("autoReconnect", String.valueOf(mySqlConfig.isAutoReconnect()));
            connectionProperties.setProperty("maxReconnects", String.valueOf(mySqlConfig.getMaxReconnects()));
        }
        if (mySqlConfig.getConnectionTimeout() != null) {
            connectionProperties.setProperty("connectTimeout", String.valueOf(mySqlConfig.getConnectionTimeout().toMillis()));
        }

        return new DriverConnectionFactory(
                new Driver(),
                config.getConnectionUrl(),
                Optional.ofNullable(config.getUserCredentialName()),
                Optional.ofNullable(config.getPasswordCredentialName()),
                connectionProperties);
    }
}
