/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF 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.
 */

package org.apache.seatunnel.engine.server.task.operation.source;

import org.apache.seatunnel.api.source.SourceSplit;
import org.apache.seatunnel.common.utils.RetryUtils;
import org.apache.seatunnel.common.utils.SerializationUtils;
import org.apache.seatunnel.engine.common.Constant;
import org.apache.seatunnel.engine.server.SeaTunnelServer;
import org.apache.seatunnel.engine.server.TaskExecutionService;
import org.apache.seatunnel.engine.server.checkpoint.operation.CheckpointErrorReportOperation;
import org.apache.seatunnel.engine.server.exception.TaskGroupContextNotFoundException;
import org.apache.seatunnel.engine.server.execution.TaskLocation;
import org.apache.seatunnel.engine.server.serializable.TaskDataSerializerHook;
import org.apache.seatunnel.engine.server.task.SourceSplitEnumeratorTask;
import org.apache.seatunnel.engine.server.task.operation.TaskOperation;

import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;

import java.io.IOException;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

public class RestoredSplitOperation extends TaskOperation {

    private byte[] splits;
    private Integer subtaskIndex;

    public RestoredSplitOperation() {}

    public RestoredSplitOperation(
            TaskLocation enumeratorLocation, byte[] splits, int subtaskIndex) {
        super(enumeratorLocation);
        this.splits = splits;
        this.subtaskIndex = subtaskIndex;
    }

    @Override
    protected void writeInternal(ObjectDataOutput out) throws IOException {
        super.writeInternal(out);
        out.writeByteArray(splits);
        out.writeInt(subtaskIndex);
    }

    @Override
    protected void readInternal(ObjectDataInput in) throws IOException {
        super.readInternal(in);
        splits = in.readByteArray();
        subtaskIndex = in.readInt();
    }

    @Override
    public int getFactoryId() {
        return TaskDataSerializerHook.FACTORY_ID;
    }

    @Override
    public int getClassId() {
        return TaskDataSerializerHook.RESTORED_SPLIT_OPERATOR;
    }

    @Override
    public void run() throws Exception {
        SeaTunnelServer server = getService();
        TaskExecutionService taskExecutionService = server.getTaskExecutionService();
        RetryUtils.retryWithException(
                () -> {
                    ClassLoader classLoader =
                            taskExecutionService
                                    .getExecutionContext(taskLocation.getTaskGroupLocation())
                                    .getClassLoader();

                    List<SourceSplit> deserialize =
                            Arrays.stream(
                                            (Object[])
                                                    SerializationUtils.deserialize(
                                                            splits, classLoader))
                                    .map(o -> (SourceSplit) o)
                                    .collect(Collectors.toList());
                    SourceSplitEnumeratorTask<SourceSplit> task =
                            taskExecutionService.getTask(taskLocation);
                    task.getExecutionContext()
                            .getTaskExecutionService()
                            .asyncExecuteFunction(
                                    taskLocation.getTaskGroupLocation(),
                                    () -> {
                                        try {
                                            task.addSplitsBack(deserialize, subtaskIndex);
                                        } catch (Exception e) {
                                            task.getExecutionContext()
                                                    .sendToMaster(
                                                            new CheckpointErrorReportOperation(
                                                                    taskLocation, e));
                                        }
                                    });
                    return null;
                },
                new RetryUtils.RetryMaterial(
                        Constant.OPERATION_RETRY_TIME,
                        true,
                        exception ->
                                exception instanceof TaskGroupContextNotFoundException
                                        && !server.taskIsEnded(taskLocation.getTaskGroupLocation()),
                        Constant.OPERATION_RETRY_SLEEP));
    }
}
