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/*
 * Copyright 2014 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 io.bitsensor.plugins.shaded.io.bitsensor.plugins.shaded.org.springframework.amqp.support.converter;

import java.util.Map;

import io.bitsensor.plugins.shaded.io.bitsensor.plugins.shaded.org.springframework.amqp.core.MessageProperties;
import io.bitsensor.plugins.shaded.io.bitsensor.plugins.shaded.org.springframework.amqp.support.AmqpHeaderMapper;
import io.bitsensor.plugins.shaded.io.bitsensor.plugins.shaded.org.springframework.amqp.support.SimpleAmqpHeaderMapper;
import io.bitsensor.plugins.shaded.org.springframework.beans.factory.InitializingBean;
import io.bitsensor.plugins.shaded.org.springframework.messaging.Message;
import io.bitsensor.plugins.shaded.org.springframework.messaging.support.MessageBuilder;
import io.bitsensor.plugins.shaded.org.springframework.util.Assert;

/**
 * Convert a {@link Message} from the messaging abstraction to and from a
 * {@link io.bitsensor.plugins.shaded.io.bitsensor.plugins.shaded.org.springframework.amqp.core.Message} using an underlying
 * {@link MessageConverter} for the payload and a
 * {@link io.bitsensor.plugins.shaded.io.bitsensor.plugins.shaded.org.springframework.amqp.support.AmqpHeaderMapper} to map the
 * AMQP headers to and from standard message headers.
 *
 * The inbound flag determines how headers should be mapped. If {@code true}
 * (default), the caller is an inbound listener (i.e. parsing an AMQP message
 * is considered to be a request).
 *
 * @author Stephane Nicoll
 * @since 1.4
 */
public class MessagingMessageConverter implements MessageConverter, InitializingBean {

	private MessageConverter payloadConverter;

	private AmqpHeaderMapper headerMapper;


	/**
	 * Create an instance with a default payload converter for an inbound
	 * handler.
	 * @see io.bitsensor.plugins.shaded.io.bitsensor.plugins.shaded.org.springframework.amqp.support.converter.SimpleMessageConverter
	 * @see io.bitsensor.plugins.shaded.io.bitsensor.plugins.shaded.org.springframework.amqp.support.SimpleAmqpHeaderMapper
	 */
	public MessagingMessageConverter() {
		this(new SimpleMessageConverter(), new SimpleAmqpHeaderMapper());
	}

	/**
	 * Create an instance with the specified payload converter and
	 * header mapper.
	 * @param payloadConverter the target {@link MessageConverter} for {@code payload}.
	 * @param headerMapper the {@link AmqpHeaderMapper} to map AMQP header to {@code MessageHeaders}.
	 */
	public MessagingMessageConverter(MessageConverter payloadConverter, AmqpHeaderMapper headerMapper) {
		Assert.notNull(payloadConverter, "PayloadConverter must not be null");
		Assert.notNull(headerMapper, "HeaderMapper must not be null");
		this.payloadConverter = payloadConverter;
		this.headerMapper = headerMapper;
	}


	/**
	 * Set the {@link MessageConverter} to use to convert the payload.
	 * @param payloadConverter the target {@link MessageConverter} for {@code payload}.
	 */
	public void setPayloadConverter(MessageConverter payloadConverter) {
		this.payloadConverter = payloadConverter;
	}

	/**
	 * Set the {@link AmqpHeaderMapper} to use to map AMQP headers to and from
	 * standard message headers.
	 * @param headerMapper the {@link AmqpHeaderMapper} to map AMQP header to {@code MessageHeaders}.
	 */
	public void setHeaderMapper(AmqpHeaderMapper headerMapper) {
		this.headerMapper = headerMapper;
	}

	@Override
	public void afterPropertiesSet() {
		Assert.notNull(this.payloadConverter, "Property 'payloadConverter' is required");
		Assert.notNull(this.headerMapper, "Property 'headerMapper' is required");
	}

	@Override
	public io.bitsensor.plugins.shaded.io.bitsensor.plugins.shaded.org.springframework.amqp.core.Message toMessage(Object object, MessageProperties messageProperties) throws MessageConversionException {
		if (!(object instanceof Message)) {
			throw new IllegalArgumentException("Could not convert [" + object + "] - only [" +
					Message.class.getName() + "] is handled by this converter");
		}
		Message input = (Message) object;
		io.bitsensor.plugins.shaded.io.bitsensor.plugins.shaded.org.springframework.amqp.core.Message amqpMessage = this.payloadConverter.toMessage(
				input.getPayload(), messageProperties);

		this.headerMapper.fromHeaders(input.getHeaders(), messageProperties);
		return amqpMessage;
	}

	@SuppressWarnings("unchecked")
	@Override
	public Object fromMessage(io.bitsensor.plugins.shaded.io.bitsensor.plugins.shaded.org.springframework.amqp.core.Message message) throws MessageConversionException {
		if (message == null) {
			return null;
		}
		Map mappedHeaders = this.headerMapper.toHeaders(message.getMessageProperties());
		Object convertedObject = extractPayload(message);
		MessageBuilder