/*
 * 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.component.kafka.integration;

import java.util.Collections;
import java.util.Properties;
import org.apache.camel.EndpointInject;
import org.apache.camel.Exchange;
import org.apache.camel.builder.AggregationStrategies;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.component.kafka.KafkaConstants;
import org.apache.camel.component.kafka.consumer.DefaultKafkaManualAsyncCommitFactory;
import org.apache.camel.component.kafka.consumer.KafkaManualCommit;
import org.apache.camel.component.kafka.consumer.KafkaManualCommitFactory;
import org.apache.camel.component.mock.MockEndpoint;
import org.apache.camel.spring.boot.CamelAutoConfiguration;
import org.apache.camel.test.spring.junit5.CamelSpringBootTest;
import org.apache.kafka.clients.producer.ProducerRecord;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.RepeatedTest;
import org.junit.jupiter.api.condition.EnabledIfSystemProperty;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.test.annotation.DirtiesContext;

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

@DirtiesContext(classMode = DirtiesContext.ClassMode.AFTER_EACH_TEST_METHOD)
@CamelSpringBootTest
@SpringBootTest(
        classes = {
                CamelAutoConfiguration.class,
                BaseEmbeddedKafkaTestSupport.DefaulKafkaComponent.class,
                KafkaConsumerAsyncManualCommitIT.class,
                KafkaConsumerAsyncManualCommitIT.TestConfiguration.class,
        }
)
@EnabledIfSystemProperty(named = "enable.kafka.consumer.async", matches = "true",
                         disabledReason = "Temporarily disabled due to being flaky")
public class KafkaConsumerAsyncManualCommitIT extends BaseEmbeddedKafkaTestSupport {

    public static final String TOPIC = "testManualCommitTest";

    private final String from = "kafka:" + TOPIC
                    + "?groupId=group1&sessionTimeoutMs=30000&autoCommitEnable=false"
                    + "&allowManualCommit=true&autoOffsetReset=earliest&kafkaManualCommitFactory=#testFactory";


    @EndpointInject("mock:result")
    private MockEndpoint to;

    @EndpointInject("mock:resultBar")
    private MockEndpoint toBar;

    private org.apache.kafka.clients.producer.KafkaProducer<String, String> producer;

    @BeforeEach
    public void before() {
        Properties props = getDefaultProperties();
        producer = new org.apache.kafka.clients.producer.KafkaProducer<>(props);
    }

    @AfterEach
    public void after() {
        if (producer != null) {
            producer.close();
        }
        // clean all test topics
        kafkaAdminClient.deleteTopics(Collections.singletonList(TOPIC));
    }

    @RepeatedTest(4)
    public void kafkaManualCommit() throws Exception {
        to.expectedMessageCount(5);
        to.expectedBodiesReceivedInAnyOrder("message-0", "message-1", "message-2", "message-3", "message-4");
        // The LAST_RECORD_BEFORE_COMMIT header should include a value as we use
        // manual commit
        to.allMessages().header(KafkaConstants.LAST_RECORD_BEFORE_COMMIT).isNotNull();

        for (int k = 0; k < 5; k++) {
            String msg = "message-" + k;
            ProducerRecord<String, String> data = new ProducerRecord<>(TOPIC, "1", msg);
            producer.send(data);
        }

        to.assertIsSatisfied(3000);

        to.reset();

        // Second step: We shut down our route, we expect nothing will be recovered by our route
        context.getRouteController().stopRoute("foo");
        to.expectedMessageCount(0);

        // Third step: While our route is stopped, we send 3 records more to Kafka test topic
        for (int k = 5; k < 8; k++) {
            String msg = "message-" + k;
            ProducerRecord<String, String> data = new ProducerRecord<>(TOPIC, "1", msg);
            producer.send(data);
        }

        to.assertIsSatisfied(3000);

        to.reset();

        // Fourth step: We start again our route, since we have been committing the offsets from the first step,
        // we will expect to consume from the latest committed offset e.g from offset 5
        context.getRouteController().startRoute("foo");
        to.expectedMessageCount(3);
        to.expectedBodiesReceivedInAnyOrder("message-5", "message-6", "message-7");

        to.assertIsSatisfied(3000);
    }

    @Configuration
    public class TestConfiguration {
        @Bean("testFactory")
        public KafkaManualCommitFactory createKafkaManualCommitFactory (){
            return new DefaultKafkaManualAsyncCommitFactory();
        }
        @Bean
        public RouteBuilder routeBuilder() {
            return new RouteBuilder() {
                @Override
                public void configure() {
                    from(from).routeId("foo").to("direct:aggregate");
                    // With sync manual commit, this would throw a concurrent modification exception
                    // It can be used in aggregator with completion timeout/interval for instance
                    // WARN: records from one partition must be processed by one unique thread
                    from("direct:aggregate").routeId("aggregate").to(to)
                            .aggregate()
                            .constant(true)
                            .completionTimeout(1)
                            .aggregationStrategy(AggregationStrategies.groupedExchange())
                            .split().body()
                            .process(e -> {
                                KafkaManualCommit manual = e.getMessage().getBody(Exchange.class)
                                        .getMessage().getHeader(KafkaConstants.MANUAL_COMMIT, KafkaManualCommit.class);
                                assertNotNull(manual);
                                manual.commit();
                            });
                    from(from).routeId("bar").autoStartup(false).to(toBar);
                }
            };
        }
    }

}
