/****************************************************************
 * Licensed to the Apache Software Foundation (ASF) under one   *
 * or more contributor license agreements.  See the NOTICE file *
 * distributed with this work for additional information        *
 * regarding copyright ownership.  The ASF 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.apache.james.modules.objectstorage.aws.s3;

import java.net.URI;

import org.apache.commons.configuration2.Configuration;
import org.apache.commons.lang3.StringUtils;
import org.apache.james.blob.objectstorage.aws.AwsS3AuthConfiguration;

public class AwsS3ConfigurationReader {

    static final String OBJECTSTORAGE_ENDPOINT = "objectstorage.s3.endPoint";
    static final String OBJECTSTORAGE_ACCESKEYID = "objectstorage.s3.accessKeyId";
    static final String OBJECTSTORAGE_SECRETKEY = "objectstorage.s3.secretKey";

    public static AwsS3AuthConfiguration from(Configuration configuration) {
        String endpoint = configuration.getString(OBJECTSTORAGE_ENDPOINT);
        if (StringUtils.isEmpty(endpoint)) {
            throw new NullPointerException("'endpoint' is mandatory");
        }

        return AwsS3AuthConfiguration.builder()
                .endpoint(URI.create(endpoint))
                .accessKeyId(configuration.getString(OBJECTSTORAGE_ACCESKEYID))
                .secretKey(configuration.getString(OBJECTSTORAGE_SECRETKEY))
                .build();
    }
}

