/*
 * 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.processor.aggregator;

import java.util.Set;

import org.apache.camel.CamelContext;
import org.apache.camel.ContextTestSupport;
import org.apache.camel.Exchange;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.component.mock.MockEndpoint;
import org.apache.camel.processor.BodyInAggregatingStrategy;
import org.apache.camel.spi.AggregationRepository;
import org.junit.jupiter.api.Test;

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

public class AggregateCompletionOnlyOneTest extends ContextTestSupport {

    private MyRepo repo = new MyRepo();

    @Test
    public void testOnlyOne() throws Exception {
        MockEndpoint mock = getMockEndpoint("mock:aggregated");
        mock.expectedBodiesReceived("A", "B", "C", "END");

        template.sendBodyAndHeader("direct:start", "A", "id", "foo");
        template.sendBodyAndHeader("direct:start", "B", "id", "foo");
        template.sendBodyAndHeader("direct:start", "C", "id", "foo");
        template.sendBodyAndHeader("direct:start", "END", "id", "foo");

        assertMockEndpointsSatisfied();

        assertEquals(4, repo.getGet());
        // add and remove is not in use as we are completed immediately
        assertEquals(0, repo.getAdd());
        assertEquals(0, repo.getRemove());
        assertEquals(4, repo.getConfirm());
    }

    @Override
    protected RouteBuilder createRouteBuilder() throws Exception {
        return new RouteBuilder() {
            @Override
            public void configure() throws Exception {
                from("direct:start").aggregate(header("id"), new BodyInAggregatingStrategy()).aggregationRepository(repo)
                        .completionSize(1).to("mock:aggregated");
            }
        };
    }

    private class MyRepo implements AggregationRepository {

        private int add;
        private int get;
        private int remove;
        private int confirm;

        @Override
        public Exchange add(CamelContext camelContext, String key, Exchange exchange) {
            add++;
            return null;
        }

        @Override
        public Exchange get(CamelContext camelContext, String key) {
            get++;
            return null;
        }

        @Override
        public void remove(CamelContext camelContext, String key, Exchange exchange) {
            remove++;
        }

        @Override
        public void confirm(CamelContext camelContext, String exchangeId) {
            confirm++;
        }

        @Override
        public Set<String> getKeys() {
            return null;
        }

        public int getAdd() {
            return add;
        }

        public int getGet() {
            return get;
        }

        public int getRemove() {
            return remove;
        }

        public int getConfirm() {
            return confirm;
        }
    }
}
