/**
 * =============================================================================
 *
 * ORCID (R) Open Source
 * http://orcid.org
 *
 * Copyright (c) 2012-2014 ORCID, Inc.
 * Licensed under an MIT-Style License (MIT)
 * http://orcid.org/open-source-license
 *
 * This copyright and license information (including a link to the full license)
 * shall be included in its entirety in all copies or substantial portion of
 * the software.
 *
 * =============================================================================
 */
package org.orcid.listener.s3;

import javax.xml.bind.JAXBException;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

import com.amazonaws.AmazonClientException;
import com.amazonaws.AmazonServiceException;
import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.auth.BasicAWSCredentials;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3Client;

@Component
public class S3MessagingService {

    Logger LOG = LoggerFactory.getLogger(S3MessagingService.class);

    private final AmazonS3 s3;    

    /**
     * Initialize the Amazon S3 connection object
     * 
     * @param secretKey
     *          Secret key to connect to S3
     * @param accessKey
     *          Access key to connect to S3
     */    
    @Autowired
    public S3MessagingService(@Value("${org.orcid.message-listener.s3.secretKey}") String secretKey, @Value("${org.orcid.message-listener.s3.accessKey}") String accessKey) throws JAXBException {
        try {
            AWSCredentials credentials = new BasicAWSCredentials(accessKey, secretKey);
            this.s3 = new AmazonS3Client(credentials);
        } catch (Exception e) {
            LOG.error("Unable to connect to the Amazon S3 service", e);
            throw e;
        }
    }

    /**
     * Sends the content to the given bucket
     * 
     * @param bucketName
     *          The name of the bucket.
     * @param elementName
     *          The name of the object to create.
     * @param elementContent
     *          the content of the object to create.
     *          
     * @return true if the element was correctly sent to the bucket
     * 
     **/
    public boolean send(String bucketName, String elementName, String elementContent) {
        try {
            s3.putObject(bucketName, elementName, elementContent);
            return true;
        } catch (AmazonServiceException ase) {
            LOG.error("AmazonServiceException while sending element '" + elementName + "' to bucket " + bucketName + " with error message '" + ase.getMessage()
                    + "' and status code '" + ase.getStatusCode() + "'");
            throw ase;
        } catch (AmazonClientException ace) {
            LOG.error("AmazonClientException while sending element '" + elementName + "' to bucket " + bucketName + " error message: " + ace.getMessage(), ace);
            throw ace;
        }        
    }

}