/*
 * Copyright 2002-2016 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.mail.config;

import org.w3c.dom.Element;

import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.support.AbstractBeanDefinition;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.support.RootBeanDefinition;
import org.springframework.beans.factory.xml.ParserContext;
import org.springframework.integration.config.xml.AbstractChannelAdapterParser;
import org.springframework.integration.config.xml.IntegrationNamespaceUtils;
import org.springframework.integration.mail.ImapIdleChannelAdapter;
import org.springframework.integration.mail.ImapMailReceiver;
import org.springframework.util.StringUtils;
import org.springframework.util.xml.DomUtils;

/**
 * Parser for the <imap-idle-channel-adapter> element in the 'mail' namespace.
 *
 * @author Jonas Partner
 * @author Mark Fisher
 * @author Oleg Zhurakousky
 * @author Gary Russell
 */
public class ImapIdleChannelAdapterParser extends AbstractChannelAdapterParser {

	@Override
	protected AbstractBeanDefinition doParse(Element element, ParserContext parserContext, String channelName) {
		BeanDefinitionBuilder builder = BeanDefinitionBuilder.genericBeanDefinition(ImapIdleChannelAdapter.class);
		builder.addConstructorArgValue(this.parseImapMailReceiver(element, parserContext));
		builder.addPropertyReference("outputChannel", channelName);
		IntegrationNamespaceUtils.setReferenceIfAttributeDefined(builder, element, "error-channel", "errorChannel");

		Element txElement = DomUtils.getChildElementByTagName(element, "transactional");
		if (txElement != null) {
			IntegrationNamespaceUtils.setReferenceIfAttributeDefined(builder, txElement,
					"synchronization-factory", "transactionSynchronizationFactory");
		}
		IntegrationNamespaceUtils.setReferenceIfAttributeDefined(builder, element, "task-executor", "sendingTaskExecutor");
		AbstractBeanDefinition beanDefinition = builder.getBeanDefinition();
		IntegrationNamespaceUtils.configureAndSetAdviceChainIfPresent(null,
				DomUtils.getChildElementByTagName(element, "transactional"), beanDefinition, parserContext);
		return beanDefinition;
	}

	private BeanDefinition parseImapMailReceiver(Element element, ParserContext parserContext) {
		BeanDefinitionBuilder receiverBuilder = BeanDefinitionBuilder.genericBeanDefinition(ImapMailReceiver.class);
		IntegrationNamespaceUtils.setReferenceIfAttributeDefined(receiverBuilder, element, "search-term-strategy");
		IntegrationNamespaceUtils.setValueIfAttributeDefined(receiverBuilder, element, "user-flag");
		Object source = parserContext.extractSource(element);
		String uri = element.getAttribute("store-uri");
		if (StringUtils.hasText(uri)) {
			receiverBuilder.addConstructorArgValue(uri);
		}
		String session = element.getAttribute("session");
		if (StringUtils.hasText(session)) {
			if (element.hasAttribute("java-mail-properties") || element.hasAttribute("authenticator")) {
				parserContext.getReaderContext().error("Neither 'java-mail-properties' nor 'authenticator' " +
						"references are allowed when a 'session' reference has been provided.", source);
			}
			receiverBuilder.addPropertyReference("session", session);
		}
		else {
			IntegrationNamespaceUtils.setReferenceIfAttributeDefined(receiverBuilder, element, "java-mail-properties");
			IntegrationNamespaceUtils.setReferenceIfAttributeDefined(receiverBuilder, element, "authenticator",
					"javaMailAuthenticator");
		}
		IntegrationNamespaceUtils.setValueIfAttributeDefined(receiverBuilder, element, "max-fetch-size");
		receiverBuilder.addPropertyValue("shouldDeleteMessages", element.getAttribute("should-delete-messages"));
		String markAsRead = element.getAttribute("should-mark-messages-as-read");
		if (StringUtils.hasText(markAsRead)) {
			receiverBuilder.addPropertyValue("shouldMarkMessagesAsRead", markAsRead);
		}

		String selectorExpression = element.getAttribute("mail-filter-expression");

		RootBeanDefinition expressionDef = null;
		if (StringUtils.hasText(selectorExpression)) {
			expressionDef = new RootBeanDefinition("org.springframework.integration.config.ExpressionFactoryBean");
			expressionDef.getConstructorArgumentValues().addGenericArgumentValue(selectorExpression);
			receiverBuilder.addPropertyValue("selectorExpression", expressionDef);
		}
		IntegrationNamespaceUtils.setReferenceIfAttributeDefined(receiverBuilder, element, "header-mapper");
		IntegrationNamespaceUtils.setValueIfAttributeDefined(receiverBuilder, element, "embedded-parts-as-bytes");
		IntegrationNamespaceUtils.setValueIfAttributeDefined(receiverBuilder, element, "simple-content");

		return receiverBuilder.getBeanDefinition();
	}
}