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/*
 * Copyright 2017-2020 original authors
 *
 * 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
 *
 * https://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.micronaut.configuration.jdbc.dbcp;

import io.micronaut.configuration.jdbc.dbcp.metadata.DbcpDataSourcePoolMetadata;
import io.micronaut.context.annotation.EachBean;
import io.micronaut.context.annotation.Factory;
import io.micronaut.core.annotation.Nullable;
import io.micronaut.jdbc.DataSourceResolver;
import io.micronaut.jdbc.metadata.DataSourcePoolMetadata;
import org.apache.commons.dbcp2.BasicDataSource;

import javax.sql.DataSource;

/**
 * Creates a dbcp data source for each configuration bean.
 *
 * @author Christian Oestreich
 * @since 1.0
 */
@Factory
public class DatasourceFactory {

    private final DataSourceResolver dataSourceResolver;

    /**
     * Default constructor.
     * @param dataSourceResolver The data source resolver
     */
    public DatasourceFactory(@Nullable DataSourceResolver dataSourceResolver) {
        this.dataSourceResolver = dataSourceResolver == null ? DataSourceResolver.DEFAULT : dataSourceResolver;
    }

    /**
     * Method to create a metadata object that allows pool value lookup for each datasource object.
     *
     * @param dataSource The actual datasource
     * @return a {@link io.micronaut.jdbc.metadata.DataSourcePoolMetadata}
     */
    @EachBean(DataSource.class)
    public DataSourcePoolMetadata dbcpDataSourcePoolMetadata(
            DataSource dataSource) {
        DbcpDataSourcePoolMetadata dbcpDataSourcePoolMetadata = null;
        DataSource resolved = dataSourceResolver.resolve(dataSource);

        if (resolved instanceof BasicDataSource) {
            dbcpDataSourcePoolMetadata = new DbcpDataSourcePoolMetadata((BasicDataSource) resolved);
        }
        return dbcpDataSourcePoolMetadata;
    }
}