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package org.apache.james.mpt.imapmailbox.rabbitmq.host;

import java.time.Duration;
import java.util.concurrent.TimeUnit;

import org.apache.james.backends.rabbitmq.DockerRabbitMQ;
import org.apache.james.backends.rabbitmq.ReactorRabbitMQChannelPool;
import org.apache.james.backends.rabbitmq.SimpleConnectionPool;
import org.apache.james.core.quota.QuotaCountLimit;
import org.apache.james.core.quota.QuotaSizeLimit;
import org.apache.james.event.json.EventSerializer;
import org.apache.james.imap.api.process.ImapProcessor;
import org.apache.james.imap.encode.main.DefaultImapEncoderFactory;
import org.apache.james.imap.main.DefaultImapDecoderFactory;
import org.apache.james.imap.processor.main.DefaultImapProcessorFactory;
import org.apache.james.mailbox.MailboxManager;
import org.apache.james.mailbox.events.MailboxIdRegistrationKey;
import org.apache.james.mailbox.events.MemoryEventDeadLetters;
import org.apache.james.mailbox.events.RabbitMQEventBus;
import org.apache.james.mailbox.events.RetryBackoffConfiguration;
import org.apache.james.mailbox.events.RoutingKeyConverter;
import org.apache.james.mailbox.inmemory.InMemoryId;
import org.apache.james.mailbox.inmemory.InMemoryMessageId;
import org.apache.james.mailbox.inmemory.manager.InMemoryIntegrationResources;
import org.apache.james.mailbox.store.StoreSubscriptionManager;
import org.apache.james.mailbox.store.quota.DefaultUserQuotaRootResolver;
import org.apache.james.metrics.logger.DefaultMetricFactory;
import org.apache.james.metrics.tests.RecordingMetricFactory;
import org.apache.james.mpt.api.ImapFeatures;
import org.apache.james.mpt.api.ImapFeatures.Feature;
import org.apache.james.mpt.host.JamesImapHostSystem;

import com.google.common.collect.ImmutableSet;

public class RabbitMQEventBusHostSystem extends JamesImapHostSystem {
    private static final ImapFeatures SUPPORTED_FEATURES = ImapFeatures.of(Feature.NAMESPACE_SUPPORT,
        Feature.MOVE_SUPPORT,
        Feature.USER_FLAGS_SUPPORT,
        Feature.QUOTA_SUPPORT,
        Feature.ANNOTATION_SUPPORT,
        Feature.MOD_SEQ_SEARCH);

    private final DockerRabbitMQ dockerRabbitMQ;
    private RabbitMQEventBus eventBus;
    private SimpleConnectionPool connectionPool;
    private InMemoryIntegrationResources resources;
    private ReactorRabbitMQChannelPool reactorRabbitMQChannelPool;

    RabbitMQEventBusHostSystem(DockerRabbitMQ dockerRabbitMQ) {
        this.dockerRabbitMQ = dockerRabbitMQ;
    }

    @Override
    public void beforeTest() throws Exception {
        super.beforeTest();

        connectionPool = new SimpleConnectionPool(dockerRabbitMQ.createRabbitConnectionFactory(),
            SimpleConnectionPool.Configuration.builder()
                .retries(2)
                .initialDelay(Duration.ofMillis(5)));
        reactorRabbitMQChannelPool = new ReactorRabbitMQChannelPool(connectionPool.getResilientConnection(),
            ReactorRabbitMQChannelPool.Configuration.DEFAULT);
        reactorRabbitMQChannelPool.start();
        eventBus = createEventBus();
        eventBus.start();

        resources = InMemoryIntegrationResources.builder()
            .authenticator(authenticator)
            .authorizator(authorizator)
            .eventBus(eventBus)
            .defaultAnnotationLimits()
            .defaultMessageParser()
            .scanningSearchIndex()
            .noPreDeletionHooks()
            .storeQuotaManager()
            .build();

        ImapProcessor defaultImapProcessorFactory =
            DefaultImapProcessorFactory.createDefaultProcessor(
                resources.getMailboxManager(),
                eventBus,
                new StoreSubscriptionManager(resources.getMailboxManager().getMapperFactory()),
                resources.getQuotaManager(),
                resources.getDefaultUserQuotaRootResolver(),
                new DefaultMetricFactory());

        configure(new DefaultImapDecoderFactory().buildImapDecoder(),
            new DefaultImapEncoderFactory().buildImapEncoder(),
            defaultImapProcessorFactory);
    }

    private RabbitMQEventBus createEventBus() {
        InMemoryMessageId.Factory messageIdFactory = new InMemoryMessageId.Factory();
        InMemoryId.Factory mailboxIdFactory = new InMemoryId.Factory();
        EventSerializer eventSerializer = new EventSerializer(mailboxIdFactory, messageIdFactory, new DefaultUserQuotaRootResolver.DefaultQuotaRootDeserializer());
        RoutingKeyConverter routingKeyConverter = new RoutingKeyConverter(ImmutableSet.of(new MailboxIdRegistrationKey.Factory(mailboxIdFactory)));
        return new RabbitMQEventBus(reactorRabbitMQChannelPool.getSender(), reactorRabbitMQChannelPool::createReceiver,
            eventSerializer, RetryBackoffConfiguration.DEFAULT, routingKeyConverter, new MemoryEventDeadLetters(),
            new RecordingMetricFactory(),
            reactorRabbitMQChannelPool);
    }

    @Override
    public void afterTest() {
        eventBus.stop();
        reactorRabbitMQChannelPool.close();
        connectionPool.close();
    }

    @Override
    protected MailboxManager getMailboxManager() {
        return resources.getMailboxManager();
    }

    @Override
    public boolean supports(Feature... features) {
        return SUPPORTED_FEATURES.supports(features);
    }

    @Override
    public void setQuotaLimits(QuotaCountLimit maxMessageQuota, QuotaSizeLimit maxStorageQuota) {
        resources.getMaxQuotaManager().setGlobalMaxMessage(maxMessageQuota);
        resources.getMaxQuotaManager().setGlobalMaxStorage(maxStorageQuota);
    }

    @Override
    protected void await() {
        try {
            TimeUnit.SECONDS.sleep(5);
        } catch (InterruptedException e) {
            throw new RuntimeException(e);
        }
    }
}