/*
 * Copyright 2002-2017 the original author or 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
 *
 *      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.springframework.integration.amqp.config;

import org.w3c.dom.Element;

import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.xml.ParserContext;
import org.springframework.integration.amqp.outbound.AmqpOutboundEndpoint;
import org.springframework.integration.amqp.outbound.AsyncAmqpOutboundGateway;
import org.springframework.integration.amqp.support.DefaultAmqpHeaderMapper;
import org.springframework.integration.config.xml.AbstractConsumerEndpointParser;
import org.springframework.integration.config.xml.IntegrationNamespaceUtils;
import org.springframework.util.StringUtils;

/**
 * Parser for the AMQP 'outbound-channel-adapter' element.
 *
 * @author Mark Fisher
 * @author Oleg Zhurakousky
 * @author Gunnar Hillert
 * @author Artem Bilan
 * @author Gary Russell
 *
 * @since 2.1
 */
public class AmqpOutboundGatewayParser extends AbstractConsumerEndpointParser {

	@Override
	protected String getInputChannelAttributeName() {
		return "request-channel";
	}

	@Override
	protected BeanDefinitionBuilder parseHandler(Element element, ParserContext parserContext) {
		BeanDefinitionBuilder builder;
		boolean async = element.getLocalName().contains("async");
		if (async) {
			builder = BeanDefinitionBuilder.genericBeanDefinition(AsyncAmqpOutboundGateway.class);
			String asyncTemplateRef = element.getAttribute("async-template");
			if (!StringUtils.hasText(asyncTemplateRef)) {
				asyncTemplateRef = "asyncRabbitTemplate";
			}
			builder.addConstructorArgReference(asyncTemplateRef);
		}
		else {
			builder = BeanDefinitionBuilder.genericBeanDefinition(AmqpOutboundEndpoint.class);
			String amqpTemplateRef = element.getAttribute("amqp-template");
			if (!StringUtils.hasText(amqpTemplateRef)) {
				amqpTemplateRef = "amqpTemplate";
			}
			builder.addConstructorArgReference(amqpTemplateRef);
			builder.addPropertyValue("expectReply", true);
		}
		IntegrationNamespaceUtils.setValueIfAttributeDefined(builder, element, "exchange-name", true);
		BeanDefinition exchangeNameExpression =
				IntegrationNamespaceUtils.createExpressionDefIfAttributeDefined("exchange-name-expression", element);
		if (exchangeNameExpression != null) {
			builder.addPropertyValue("exchangeNameExpression", exchangeNameExpression);
		}
		IntegrationNamespaceUtils.setValueIfAttributeDefined(builder, element, "routing-key", true);
		BeanDefinition routingKeyExpression =
				IntegrationNamespaceUtils.createExpressionDefIfAttributeDefined("routing-key-expression", element);
		if (routingKeyExpression != null) {
			builder.addPropertyValue("routingKeyExpression", routingKeyExpression);
		}
		IntegrationNamespaceUtils.setValueIfAttributeDefined(builder, element, "reply-timeout", "sendTimeout");
		IntegrationNamespaceUtils.setValueIfAttributeDefined(builder, element, "requires-reply");
		IntegrationNamespaceUtils.setValueIfAttributeDefined(builder, element, "default-delivery-mode");
		IntegrationNamespaceUtils.setValueIfAttributeDefined(builder, element, "lazy-connect");

		IntegrationNamespaceUtils.setReferenceIfAttributeDefined(builder, element, "reply-channel", "outputChannel");
		IntegrationNamespaceUtils.setReferenceIfAttributeDefined(builder, element, "return-channel");
		BeanDefinition confirmCorrelationExpression =
				IntegrationNamespaceUtils.createExpressionDefIfAttributeDefined("confirm-correlation-expression", element);
		if (confirmCorrelationExpression != null) {
			builder.addPropertyValue("confirmCorrelationExpression", confirmCorrelationExpression);
		}

		IntegrationNamespaceUtils.setReferenceIfAttributeDefined(builder, element, "confirm-ack-channel");
		IntegrationNamespaceUtils.setReferenceIfAttributeDefined(builder, element, "confirm-nack-channel");

		BeanDefinitionBuilder mapperBuilder = BeanDefinitionBuilder
				.genericBeanDefinition(DefaultAmqpHeaderMapper.class);
		mapperBuilder.setFactoryMethod("outboundMapper");
		IntegrationNamespaceUtils.configureHeaderMapper(element, builder, parserContext, mapperBuilder,
				null);
		IntegrationNamespaceUtils.setValueIfAttributeDefined(builder, element, "delay-expression",
				"delayExpressionString");
		IntegrationNamespaceUtils.setValueIfAttributeDefined(builder, element, "headers-last", "headersMappedLast");

		return builder;
	}

}