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/*
 * 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.trino.transaction;

import com.google.common.collect.ImmutableList;
import com.google.inject.Binder;
import com.google.inject.Inject;
import com.google.inject.Module;
import com.google.inject.Provides;
import com.google.inject.Singleton;
import io.trino.metadata.CatalogManager;
import io.trino.spi.VersionEmbedder;
import jakarta.annotation.PreDestroy;

import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.ScheduledExecutorService;

import static io.airlift.concurrent.Threads.daemonThreadsNamed;
import static io.airlift.configuration.ConfigBinder.configBinder;
import static java.util.concurrent.Executors.newCachedThreadPool;
import static java.util.concurrent.Executors.newSingleThreadScheduledExecutor;

public class InMemoryTransactionManagerModule
        implements Module
{
    @Override
    public void configure(Binder binder)
    {
        configBinder(binder).bindConfig(TransactionManagerConfig.class);
        binder.bind(ExecutorCleanup.class).asEagerSingleton();
    }

    @Provides
    @Singleton
    @ForTransactionManager
    public static ScheduledExecutorService createTransactionIdleCheckExecutor()
    {
        return newSingleThreadScheduledExecutor(daemonThreadsNamed("transaction-idle-check"));
    }

    @Provides
    @Singleton
    @ForTransactionManager
    public static ExecutorService createTransactionFinishingExecutor()
    {
        return newCachedThreadPool(daemonThreadsNamed("transaction-finishing-%s"));
    }

    @Provides
    @Singleton
    public static TransactionManager createTransactionManager(
            TransactionManagerConfig config,
            CatalogManager catalogManager,
            VersionEmbedder versionEmbedder,
            @ForTransactionManager ScheduledExecutorService idleCheckExecutor,
            @ForTransactionManager ExecutorService finishingExecutor)
    {
        return InMemoryTransactionManager.create(config, idleCheckExecutor, catalogManager, versionEmbedder.embedVersion(finishingExecutor));
    }

    public static class ExecutorCleanup
    {
        private final List executors;

        @Inject
        public ExecutorCleanup(
                @ForTransactionManager ExecutorService transactionFinishingExecutor,
                @ForTransactionManager ScheduledExecutorService transactionIdleExecutor)
        {
            executors = ImmutableList.builder()
                    .add(transactionFinishingExecutor)
                    .add(transactionIdleExecutor)
                    .build();
        }

        @PreDestroy
        public void shutdown()
        {
            executors.forEach(ExecutorService::shutdownNow);
        }
    }
}