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/*
 * Copyright 2024 Responsive Computing, Inc.
 *
 * This source code is licensed under the Responsive Business Source License Agreement v1.0
 * available at:
 *
 * https://www.responsive.dev/legal/responsive-bsl-10
 *
 * This software requires a valid Commercial License Key for production use. Trial and commercial
 * licenses can be obtained at https://www.responsive.dev
 */

package org.apache.kafka.streams.state.internals;

import dev.responsive.kafka.api.async.internals.stores.AbstractAsyncStoreBuilder;
import dev.responsive.kafka.api.async.internals.stores.AsyncFlushingKeyValueStore;
import dev.responsive.kafka.internal.stores.ResponsiveStoreBuilder;
import org.apache.kafka.common.serialization.Serde;
import org.apache.kafka.common.utils.Bytes;
import org.apache.kafka.common.utils.Time;
import org.apache.kafka.streams.state.KeyValueBytesStoreSupplier;
import org.apache.kafka.streams.state.KeyValueStore;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Essentially a copy of the {@link KeyValueStoreBuilder} class that
 * allows us to inject an additional layer, the {@link AsyncFlushingKeyValueStore}.
 * We also use this builder to coordinate between the async processor (which is
 * responsible for creating this builder) and the async flushing store (which is
 * created by this builder).
 */
public class AsyncKeyValueStoreBuilder
    extends AbstractAsyncStoreBuilder> {

  private static final Logger LOG =
      LoggerFactory.getLogger(AsyncKeyValueStoreBuilder.class);
  private final KeyValueBytesStoreSupplier storeSupplier;

  @SuppressWarnings("unchecked")
  public AsyncKeyValueStoreBuilder(
      final ResponsiveStoreBuilder responsiveBuilder
  ) {
    this(
        (KeyValueBytesStoreSupplier) responsiveBuilder.storeSupplier(),
        (Serde) responsiveBuilder.keySerde(),
        responsiveBuilder.innerValueSerde(),
        responsiveBuilder.time()
    );
  }

  private AsyncKeyValueStoreBuilder(
      final KeyValueBytesStoreSupplier storeSupplier,
      final Serde keySerde,
      final Serde valueSerde,
      final Time time
  ) {
    super(
        storeSupplier.name(),
        keySerde,
        valueSerde,
        time
    );
    this.storeSupplier = storeSupplier;
    LOG.debug("Created async KV store builder with valueSerde = {}", valueSerde);
  }

  @Override
  public KeyValueStore build() {
    final KeyValueStore store = storeSupplier.get();

    return new MeteredKeyValueStore<>(
        wrapAsyncFlushingKV(
            maybeWrapCaching(
                maybeWrapLogging(store))
        ),
        storeSupplier.metricsScope(),
        time,
        keySerde,
        valueSerde
    );
  }

  private KeyValueStore maybeWrapCaching(final KeyValueStore inner) {
    if (!cachingEnabled()) {
      return inner;
    }
    return new CachingKeyValueStore(inner, true);
  }

  private KeyValueStore maybeWrapLogging(final KeyValueStore inner) {
    if (!loggingEnabled()) {
      return inner;
    }
    return new ChangeLoggingKeyValueBytesStore(inner);
  }

}