package org.kuali.common.devops.jenkins.monitor.ses;
   
   import org.kuali.common.aws.model.ImmutableAWSCredentials;
   import org.kuali.common.core.build.ValidatingBuilder;
   import org.kuali.common.core.validate.annotation.IdiotProofImmutable;
   
   import com.amazonaws.auth.AWSCredentials;
   import com.amazonaws.regions.Region;
   import com.amazonaws.regions.Regions;
  import com.amazonaws.services.simpleemail.AmazonSimpleEmailServiceClient;
  import com.amazonaws.services.simpleemail.model.Body;
  import com.amazonaws.services.simpleemail.model.Content;
  import com.amazonaws.services.simpleemail.model.Destination;
  import com.amazonaws.services.simpleemail.model.Message;
  import com.amazonaws.services.simpleemail.model.SendEmailRequest;
  
  @IdiotProofImmutable
  public final class DefaultEmailService implements EmailService {
  
  	private static final String[] EMPTY_STRING_ARRAY = {};
  
  	private final ImmutableAWSCredentials credentials;
  	private final Region region;
  	private final AmazonSimpleEmailServiceClient client;
  
  	@Override
  	public void send(Email email) {
  		// Construct an object to contain the recipient address.
  		Destination destination = new Destination().withToAddresses(email.getTo().toArray(EMPTY_STRING_ARRAY));
  
  		// Create the subject and body of the message.
  		Content subject = new Content().withData(email.getSubject());
  		Content contentBody = new Content().withData(email.getBody());
  		Body body = new Body();
  		if (email.isHtml()) {
  			body.setHtml(contentBody);
  		} else {
  			body.setText(contentBody);
  		}
  
  		// Create a message with the specified subject and body.
  		Message message = new Message().withSubject(subject).withBody(body);
  
  		// Assemble the email.
  		SendEmailRequest request = new SendEmailRequest().withSource(email.getFrom()).withDestination(destination).withMessage(message);
  
  		// Send the email.
  		client.sendEmail(request);
  	}
  
  	private DefaultEmailService(Builder builder) {
  		this.credentials = ImmutableAWSCredentials.copyOf(builder.credentials);
  		this.region = builder.region;
  		this.client = new AmazonSimpleEmailServiceClient(credentials);
  		this.client.setRegion(region);
  	}
  
  	public static Builder builder() {
  		return new Builder();
  	}
  
  	public static class Builder extends ValidatingBuilder<DefaultEmailService> {
  
  		private AWSCredentials credentials;
  		private Region region = Region.getRegion(Regions.US_EAST_1);
  
  		public Builder withCredentials(AWSCredentials credentials) {
  			this.credentials = credentials;
  			return this;
  		}
  
  		public Builder withRegion(Region region) {
  			this.region = region;
  			return this;
  		}
  
  		@Override
  		public DefaultEmailService build() {
  			return validate(new DefaultEmailService(this));
  		}
  	}
  
  	public AWSCredentials getCredentials() {
  		return credentials;
  	}
  
  	public Region getRegion() {
  		return region;
  	}
  
  }