/*
 * 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.action.resync;

import org.opensearch.action.support.replication.ReplicatedWriteRequest;
import org.opensearch.core.common.io.stream.StreamInput;
import org.opensearch.core.common.io.stream.StreamOutput;
import org.opensearch.core.index.shard.ShardId;
import org.opensearch.index.translog.Translog;

import java.io.IOException;
import java.util.Arrays;
import java.util.Objects;

/**
 * Represents a batch of operations sent from the primary to its replicas during the primary-replica resync.
 *
 *  @opensearch.internal
 */
public final class ResyncReplicationRequest extends ReplicatedWriteRequest<ResyncReplicationRequest> {

    private final long trimAboveSeqNo;
    private final Translog.Operation[] operations;
    private final long maxSeenAutoIdTimestampOnPrimary;

    ResyncReplicationRequest(StreamInput in) throws IOException {
        super(in);
        trimAboveSeqNo = in.readZLong();
        maxSeenAutoIdTimestampOnPrimary = in.readZLong();
        operations = in.readArray(Translog.Operation::readOperation, Translog.Operation[]::new);
    }

    public ResyncReplicationRequest(
        final ShardId shardId,
        final long trimAboveSeqNo,
        final long maxSeenAutoIdTimestampOnPrimary,
        final Translog.Operation[] operations
    ) {
        super(shardId);
        this.trimAboveSeqNo = trimAboveSeqNo;
        this.maxSeenAutoIdTimestampOnPrimary = maxSeenAutoIdTimestampOnPrimary;
        this.operations = operations;
    }

    public long getTrimAboveSeqNo() {
        return trimAboveSeqNo;
    }

    public long getMaxSeenAutoIdTimestampOnPrimary() {
        return maxSeenAutoIdTimestampOnPrimary;
    }

    public Translog.Operation[] getOperations() {
        return operations;
    }

    @Override
    public void writeTo(final StreamOutput out) throws IOException {
        super.writeTo(out);
        out.writeZLong(trimAboveSeqNo);
        out.writeZLong(maxSeenAutoIdTimestampOnPrimary);
        out.writeArray(Translog.Operation::writeOperation, operations);
    }

    @Override
    public boolean equals(final Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        final ResyncReplicationRequest that = (ResyncReplicationRequest) o;
        return trimAboveSeqNo == that.trimAboveSeqNo
            && maxSeenAutoIdTimestampOnPrimary == that.maxSeenAutoIdTimestampOnPrimary
            && Arrays.equals(operations, that.operations);
    }

    @Override
    public int hashCode() {
        return Objects.hash(trimAboveSeqNo, maxSeenAutoIdTimestampOnPrimary, operations);
    }

    @Override
    public String toString() {
        return "TransportResyncReplicationAction.Request{"
            + "shardId="
            + shardId
            + ", timeout="
            + timeout
            + ", index='"
            + index
            + '\''
            + ", trimAboveSeqNo="
            + trimAboveSeqNo
            + ", maxSeenAutoIdTimestampOnPrimary="
            + maxSeenAutoIdTimestampOnPrimary
            + ", ops="
            + operations.length
            + "}";
    }

}