/*
 * SPDX-License-Identifier: Apache-2.0
 *
 * The OpenSearch Contributors require contributions made to
 * this file be licensed under the Apache-2.0 license or a
 * compatible open source license.
 */

/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch 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.
 */

/*
 * Modifications Copyright OpenSearch Contributors. See
 * GitHub history for details.
 */

package org.opensearch.index.seqno;

import org.opensearch.action.ActionListener;
import org.opensearch.action.support.replication.ReplicationResponse;
import org.opensearch.common.inject.Inject;
import org.opensearch.core.index.shard.ShardId;

import java.util.Objects;

/**
 * Syncs retention leases
 *
 * @opensearch.internal
 */
public class RetentionLeaseSyncer {
    private final SyncAction syncAction;
    private final BackgroundSyncAction backgroundSyncAction;

    @Inject
    public RetentionLeaseSyncer(RetentionLeaseSyncAction syncAction, RetentionLeaseBackgroundSyncAction backgroundSyncAction) {
        this(syncAction::sync, backgroundSyncAction::backgroundSync);
    }

    public RetentionLeaseSyncer(SyncAction syncAction, BackgroundSyncAction backgroundSyncAction) {
        this.syncAction = Objects.requireNonNull(syncAction);
        this.backgroundSyncAction = Objects.requireNonNull(backgroundSyncAction);
    }

    public static final RetentionLeaseSyncer EMPTY = new RetentionLeaseSyncer(
        (shardId, primaryAllocationId, primaryTerm, retentionLeases, listener) -> listener.onResponse(new ReplicationResponse()),
        (shardId, primaryAllocationId, primaryTerm, retentionLeases) -> {}
    );

    public void sync(
        ShardId shardId,
        String primaryAllocationId,
        long primaryTerm,
        RetentionLeases retentionLeases,
        ActionListener<ReplicationResponse> listener
    ) {
        syncAction.sync(shardId, primaryAllocationId, primaryTerm, retentionLeases, listener);
    }

    public void backgroundSync(ShardId shardId, String primaryAllocationId, long primaryTerm, RetentionLeases retentionLeases) {
        backgroundSyncAction.backgroundSync(shardId, primaryAllocationId, primaryTerm, retentionLeases);
    }

    /**
     * Represents an action that is invoked to sync retention leases to replica shards after a retention lease is added
     * or removed on the primary. The specified listener is invoked when the syncing completes with success or failure.
     *
     * @opensearch.internal
     */
    public interface SyncAction {
        void sync(
            ShardId shardId,
            String primaryAllocationId,
            long primaryTerm,
            RetentionLeases retentionLeases,
            ActionListener<ReplicationResponse> listener
        );
    }

    /**
     * Represents an action that is invoked periodically to sync retention leases to replica shards after some retention
     * lease has been renewed or expired.
     *
     * @opensearch.internal
     */
    public interface BackgroundSyncAction {
        void backgroundSync(ShardId shardId, String primaryAllocationId, long primaryTerm, RetentionLeases retentionLeases);
    }
}