/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.camel.attachment;

import jakarta.activation.DataHandler;

import org.apache.camel.AggregationStrategy;
import org.apache.camel.Exchange;
import org.apache.camel.builder.Builder;
import org.apache.camel.builder.ExchangeBuilder;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.impl.DefaultCamelContext;
import org.apache.camel.test.junit6.CamelTestSupport;
import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertTrue;

class MulticastAggregationStrategyTest extends CamelTestSupport {

    @Test
    void testAggregationStrategyWithAttachment() {
        Exchange exchange = ExchangeBuilder.anExchange(new DefaultCamelContext()).build();

        template.send("direct:start", exchange);

        AttachmentMessage msg = exchange.getMessage(AttachmentMessage.class);

        assertTrue(msg.hasAttachments());
    }

    @Override
    protected RouteBuilder createRouteBuilder() {
        return new RouteBuilder() {
            @Override
            public void configure() {
                from("direct:start")
                    .multicast(new AttachmentMessageAggregationStrategy()).stopOnException()
                        .to("direct:setBody", "direct:setAttachment")
                    .end();

                from("direct:setBody")
                        .setBody(Builder.constant("body"));

                from("direct:setAttachment")
                        .setBody(Builder.constant("attachment".getBytes()));
            }
        };
    }

    private static class AttachmentMessageAggregationStrategy implements AggregationStrategy {

        @Override
        public Exchange aggregate(Exchange oldExchange, Exchange newExchange) {
            if (oldExchange == null) {
                return newExchange;
            }

            if (newExchange.getIn().getBody() instanceof String) {
                oldExchange.getMessage().setBody(newExchange.getIn().getBody());
            } else {
                byte[] data = newExchange.getIn().getBody(byte[].class);
                oldExchange.getMessage(AttachmentMessage.class).addAttachment("attachment",
                        new DataHandler(data, "text/plain"));
            }

            return oldExchange;
        }
    }
}
